1e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet/* 2e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Copyright (C) 2011 The Android Open Source Project 3e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 4e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Licensed under the Apache License, Version 2.0 (the "License"); 5e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * you may not use this file except in compliance with the License. 6e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * You may obtain a copy of the License at 7e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 8e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * http://www.apache.org/licenses/LICENSE-2.0 9e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 10e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Unless required by applicable law or agreed to in writing, software 11e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * distributed under the License is distributed on an "AS IS" BASIS, 12e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * See the License for the specific language governing permissions and 14e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * limitations under the License. 15e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 16e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 17e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetpackage android.support.v7.widget; 18e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 19e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.content.Context; 20e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.content.res.TypedArray; 21e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.graphics.Canvas; 22e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.graphics.Paint; 23b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powellimport android.support.v4.view.GravityCompat; 24b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powellimport android.support.v4.view.ViewCompat; 25b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powellimport android.support.v4.view.ViewGroupCompat; 26e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.util.AttributeSet; 27e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.util.Log; 282c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglioimport android.util.LogPrinter; 29e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.util.Pair; 302c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglioimport android.util.Printer; 31e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.view.Gravity; 32e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.view.View; 33e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.view.ViewGroup; 34e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.view.accessibility.AccessibilityEvent; 35e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.widget.LinearLayout; 36e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 37e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport android.support.v7.gridlayout.R; 38e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 39e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport java.lang.reflect.Array; 40e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport java.util.ArrayList; 41e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport java.util.Arrays; 42e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport java.util.HashMap; 43e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport java.util.List; 44e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport java.util.Map; 45e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 46e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport static android.view.Gravity.*; 47e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport static android.view.View.MeasureSpec.EXACTLY; 48e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport static android.view.View.MeasureSpec.makeMeasureSpec; 49e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport static java.lang.Math.max; 50e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohetimport static java.lang.Math.min; 51e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 52e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet/** 53e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * A layout that places its children in a rectangular <em>grid</em>. 54e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 55e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The grid is composed of a set of infinitely thin lines that separate the 56e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * viewing area into <em>cells</em>. Throughout the API, grid lines are referenced 57e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * by grid <em>indices</em>. A grid with {@code N} columns 58e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * has {@code N + 1} grid indices that run from {@code 0} 59e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * through {@code N} inclusive. Regardless of how GridLayout is 60e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * configured, grid index {@code 0} is fixed to the leading edge of the 61e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * container and grid index {@code N} is fixed to its trailing edge 62e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * (after padding is taken into account). 63e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 64e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <h4>Row and Column Specs</h4> 65e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 66e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Children occupy one or more contiguous cells, as defined 67e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * by their {@link GridLayout.LayoutParams#rowSpec rowSpec} and 68e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout.LayoutParams#columnSpec columnSpec} layout parameters. 69e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Each spec defines the set of rows or columns that are to be 70e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * occupied; and how children should be aligned within the resulting group of cells. 71e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Although cells do not normally overlap in a GridLayout, GridLayout does 72e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * not prevent children being defined to occupy the same cell or group of cells. 73e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * In this case however, there is no guarantee that children will not themselves 74e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * overlap after the layout operation completes. 75e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 76e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <h4>Default Cell Assignment</h4> 77e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 78e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * If a child does not specify the row and column indices of the cell it 79e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * wishes to occupy, GridLayout assigns cell locations automatically using its: 80e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout#setOrientation(int) orientation}, 81e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout#setRowCount(int) rowCount} and 82e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout#setColumnCount(int) columnCount} properties. 83e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 84e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <h4>Space</h4> 85e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 86e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Space between children may be specified either by using instances of the 87b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell * dedicated {@link android.support.v7.widget.Space} view or by setting the 88e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 89e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link ViewGroup.MarginLayoutParams#leftMargin leftMargin}, 90e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link ViewGroup.MarginLayoutParams#topMargin topMargin}, 91e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link ViewGroup.MarginLayoutParams#rightMargin rightMargin} and 92e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link ViewGroup.MarginLayoutParams#bottomMargin bottomMargin} 93e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 94e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * layout parameters. When the 95e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout#setUseDefaultMargins(boolean) useDefaultMargins} 96e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * property is set, default margins around children are automatically 97e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * allocated based on the prevailing UI style guide for the platform. 98e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Each of the margins so defined may be independently overridden by an assignment 99e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * to the appropriate layout parameter. 100e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Default values will generally produce a reasonable spacing between components 101e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * but values may change between different releases of the platform. 102e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 103e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <h4>Excess Space Distribution</h4> 104e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 105e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * GridLayout's distribution of excess space is based on <em>priority</em> 106e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * rather than <em>weight</em>. 107e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 108e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * A child's ability to stretch is inferred from the alignment properties of 109e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * its row and column groups (which are typically set by setting the 110e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link LayoutParams#setGravity(int) gravity} property of the child's layout parameters). 111e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * If alignment was defined along a given axis then the component 112e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * is taken as <em>flexible</em> in that direction. If no alignment was set, 113e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * the component is instead assumed to be <em>inflexible</em>. 114e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 115e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Multiple components in the same row or column group are 116e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * considered to act in <em>parallel</em>. Such a 117e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * group is flexible only if <em>all</em> of the components 118e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * within it are flexible. Row and column groups that sit either side of a common boundary 119e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * are instead considered to act in <em>series</em>. The composite group made of these two 120e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * elements is flexible if <em>one</em> of its elements is flexible. 121e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 122e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * To make a column stretch, make sure all of the components inside it define a 123e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * gravity. To prevent a column from stretching, ensure that one of the components 124e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * in the column does not define a gravity. 125e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 126e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When the principle of flexibility does not provide complete disambiguation, 127e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * GridLayout's algorithms favour rows and columns that are closer to its <em>right</em> 128e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * and <em>bottom</em> edges. 129e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1302c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <h4>Interpretation of GONE</h4> 1312c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 1322c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * For layout purposes, GridLayout treats views whose visibility status is 1332c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * {@link View#GONE GONE}, as having zero width and height. This is subtly different from 1342c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * the policy of ignoring views that are marked as GONE outright. If, for example, a gone-marked 1352c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * view was alone in a column, that column would itself collapse to zero width if and only if 1362c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * no gravity was defined on the view. If gravity was defined, then the gone-marked 1372c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * view has no effect on the layout and the container should be laid out as if the view 1382c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * had never been added to it. 1392c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * These statements apply equally to rows as well as columns, and to groups of rows or columns. 1402c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 141e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <h5>Limitations</h5> 142e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 143e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * GridLayout does not provide support for the principle of <em>weight</em>, as defined in 144e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link LinearLayout.LayoutParams#weight}. In general, it is not therefore possible 145e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * to configure a GridLayout to distribute excess space between multiple components. 146e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 147e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Some common use-cases may nevertheless be accommodated as follows. 148e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * To place equal amounts of space around a component in a cell group; 149e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * use {@link #CENTER} alignment (or {@link LayoutParams#setGravity(int) gravity}). 150e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * For complete control over excess space distribution in a row or column; 151e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * use a {@link LinearLayout} subview to hold the components in the associated cell group. 152e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When using either of these techniques, bear in mind that cell groups may be defined to overlap. 153e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 154e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * See {@link GridLayout.LayoutParams} for a full description of the 155e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * layout parameters used by GridLayout. 156e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 157e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_orientation 158e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_rowCount 159e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_columnCount 160e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_useDefaultMargins 161e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_rowOrderPreserved 162e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_columnOrderPreserved 163e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 164b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powellpublic class GridLayout extends android.view.ViewGroup { 165e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 166e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Public constants 167e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 168e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 169e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The horizontal orientation. 170e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 171e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final int HORIZONTAL = LinearLayout.HORIZONTAL; 172e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 173e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 174e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The vertical orientation. 175e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 176e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final int VERTICAL = LinearLayout.VERTICAL; 177e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 178e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 179e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The constant used to indicate that a value is undefined. 180e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Fields can use this value to indicate that their values 181e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * have not yet been set. Similarly, methods can return this value 182e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * to indicate that there is no suitable value that the implementation 183e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * can return. 184e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The value used for the constant (currently {@link Integer#MIN_VALUE}) is 185e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * intended to avoid confusion between valid values whose sign may not be known. 186e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 187e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final int UNDEFINED = Integer.MIN_VALUE; 188e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 189e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 190e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * This constant is an {@link #setAlignmentMode(int) alignmentMode}. 191e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When the {@code alignmentMode} is set to {@link #ALIGN_BOUNDS}, alignment 192e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * is made between the edges of each component's raw 193e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * view boundary: i.e. the area delimited by the component's: 194e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link android.view.View#getTop() top}, 195e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link android.view.View#getLeft() left}, 196e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link android.view.View#getBottom() bottom} and 197e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link android.view.View#getRight() right} properties. 198e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 199e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * For example, when {@code GridLayout} is in {@link #ALIGN_BOUNDS} mode, 200e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * children that belong to a row group that uses {@link #TOP} alignment will 201e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * all return the same value when their {@link android.view.View#getTop()} 202e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * method is called. 203e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 204e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setAlignmentMode(int) 205e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 206e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final int ALIGN_BOUNDS = 0; 207e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 208e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 209e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * This constant is an {@link #setAlignmentMode(int) alignmentMode}. 210e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When the {@code alignmentMode} is set to {@link #ALIGN_MARGINS}, 211e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * the bounds of each view are extended outwards, according 212e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * to their margins, before the edges of the resulting rectangle are aligned. 213e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 214e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * For example, when {@code GridLayout} is in {@link #ALIGN_MARGINS} mode, 215e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * the quantity {@code top - layoutParams.topMargin} is the same for all children that 216e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * belong to a row group that uses {@link #TOP} alignment. 217e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 218e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setAlignmentMode(int) 219e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 220e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final int ALIGN_MARGINS = 1; 221e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 222e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Misc constants 223e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 224e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static final int MAX_SIZE = 100000; 225e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static final int DEFAULT_CONTAINER_MARGIN = 0; 226e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static final int UNINITIALIZED_HASH = 0; 2272c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio static final Printer LOG_PRINTER = new LogPrinter(Log.DEBUG, GridLayout.class.getName()); 2282c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio static final Printer NO_PRINTER = new Printer() { 2292c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio @Override 2302c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public void println(String x) { 2312c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 2322c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio }; 233e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 234e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Defaults 235e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 236e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int DEFAULT_ORIENTATION = HORIZONTAL; 237e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int DEFAULT_COUNT = UNDEFINED; 238e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final boolean DEFAULT_USE_DEFAULT_MARGINS = false; 239e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final boolean DEFAULT_ORDER_PRESERVED = true; 240e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int DEFAULT_ALIGNMENT_MODE = ALIGN_MARGINS; 241e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 242e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // TypedArray indices 243e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 244e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int ORIENTATION = R.styleable.GridLayout_orientation; 245e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int ROW_COUNT = R.styleable.GridLayout_rowCount; 246e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int COLUMN_COUNT = R.styleable.GridLayout_columnCount; 247e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int USE_DEFAULT_MARGINS = R.styleable.GridLayout_useDefaultMargins; 248e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int ALIGNMENT_MODE = R.styleable.GridLayout_alignmentMode; 249e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int ROW_ORDER_PRESERVED = R.styleable.GridLayout_rowOrderPreserved; 250e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int COLUMN_ORDER_PRESERVED = R.styleable.GridLayout_columnOrderPreserved; 251e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 252e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Instance variables 253e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 254b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell final Axis mHorizontalAxis = new Axis(true); 255b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell final Axis mVerticalAxis = new Axis(false); 256b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell int mOrientation = DEFAULT_ORIENTATION; 257b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell boolean mUseDefaultMargins = DEFAULT_USE_DEFAULT_MARGINS; 258b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell int mAlignmentMode = DEFAULT_ALIGNMENT_MODE; 259b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell int mDefaultGap; 260b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell int mLastLayoutParamsHashCode = UNINITIALIZED_HASH; 261b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell Printer mPrinter = LOG_PRINTER; 262e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 263e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Constructors 264e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 265e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 266e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@inheritDoc} 267e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 268e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public GridLayout(Context context, AttributeSet attrs, int defStyle) { 269e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet super(context, attrs, defStyle); 270b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mDefaultGap = context.getResources().getDimensionPixelOffset(R.dimen.default_gap); 271e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.GridLayout); 272e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet try { 273e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setRowCount(a.getInt(ROW_COUNT, DEFAULT_COUNT)); 274e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setColumnCount(a.getInt(COLUMN_COUNT, DEFAULT_COUNT)); 275e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setOrientation(a.getInt(ORIENTATION, DEFAULT_ORIENTATION)); 276e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setUseDefaultMargins(a.getBoolean(USE_DEFAULT_MARGINS, DEFAULT_USE_DEFAULT_MARGINS)); 277e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setAlignmentMode(a.getInt(ALIGNMENT_MODE, DEFAULT_ALIGNMENT_MODE)); 278e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setRowOrderPreserved(a.getBoolean(ROW_ORDER_PRESERVED, DEFAULT_ORDER_PRESERVED)); 279e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setColumnOrderPreserved(a.getBoolean(COLUMN_ORDER_PRESERVED, DEFAULT_ORDER_PRESERVED)); 280e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } finally { 281e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet a.recycle(); 282e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 283e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 284e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 285e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 286e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@inheritDoc} 287e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 288e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public GridLayout(Context context, AttributeSet attrs) { 289e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this(context, attrs, 0); 290e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 291e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 292e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 293e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@inheritDoc} 294e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 295e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public GridLayout(Context context) { 296e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet //noinspection NullableProblems 297e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this(context, null); 298e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 299e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 300e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Implementation 301e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 302e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 303e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns the current orientation. 304e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 305e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return either {@link #HORIZONTAL} or {@link #VERTICAL} 306e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 307e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setOrientation(int) 308e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 309e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_orientation 310e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 311e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int getOrientation() { 312b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return mOrientation; 313e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 314e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 315e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 3162c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 3172c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * GridLayout uses the orientation property for two purposes: 3182c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <ul> 3192c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <li> 3202c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * To control the 'direction' in which default row/column indices are generated 3212c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * when they are not specified in a component's layout parameters. 3222c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * </li> 3232c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <li> 3242c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * To control which axis should be processed first during the layout operation: 3252c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * when orientation is {@link #HORIZONTAL} the horizontal axis is laid out first. 3262c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * </li> 3272c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * </ul> 3282c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 3292c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * The order in which axes are laid out is important if, for example, the height of 3302c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * one of GridLayout's children is dependent on its width - and its width is, in turn, 3312c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * dependent on the widths of other components. 3322c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <p> 3332c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * If your layout contains a {@link android.widget.TextView} (or derivative: 3342c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * {@code Button}, {@code EditText}, {@code CheckBox}, etc.) which is 3352c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * in multi-line mode (the default) it is normally best to leave GridLayout's 3362c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * orientation as {@code HORIZONTAL} - because {@code TextView} is capable of 3372c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * deriving its height for a given width, but not the other way around. 3382c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <p> 3392c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * Other than the effects above, orientation does not affect the actual layout operation of 3402c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * GridLayout, so it's fine to leave GridLayout in {@code HORIZONTAL} mode even if 3412c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * the height of the intended layout greatly exceeds its width. 342e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 343e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The default value of this property is {@link #HORIZONTAL}. 344e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 345e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param orientation either {@link #HORIZONTAL} or {@link #VERTICAL} 346e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 347e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #getOrientation() 348e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 349e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_orientation 350e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 351e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setOrientation(int orientation) { 352b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (this.mOrientation != orientation) { 353b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell this.mOrientation = orientation; 354e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateStructure(); 355e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet requestLayout(); 356e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 357e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 358e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 359e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 360e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns the current number of rows. This is either the last value that was set 361e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * with {@link #setRowCount(int)} or, if no such value was set, the maximum 362e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * value of each the upper bounds defined in {@link LayoutParams#rowSpec}. 363e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 364e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return the current number of rows 365e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 366e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setRowCount(int) 367e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see LayoutParams#rowSpec 368e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 369e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_rowCount 370e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 371e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int getRowCount() { 372b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return mVerticalAxis.getCount(); 373e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 374e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 375e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 376e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * RowCount is used only to generate default row/column indices when 377e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * they are not specified by a component's layout parameters. 378e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 379e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param rowCount the number of rows 380e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 381e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #getRowCount() 382e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see LayoutParams#rowSpec 383e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 384e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_rowCount 385e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 386e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setRowCount(int rowCount) { 387b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mVerticalAxis.setCount(rowCount); 388e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateStructure(); 389e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet requestLayout(); 390e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 391e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 392e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 393e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns the current number of columns. This is either the last value that was set 394e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * with {@link #setColumnCount(int)} or, if no such value was set, the maximum 395e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * value of each the upper bounds defined in {@link LayoutParams#columnSpec}. 396e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 397e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return the current number of columns 398e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 399e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setColumnCount(int) 400e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see LayoutParams#columnSpec 401e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 402e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_columnCount 403e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 404e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int getColumnCount() { 405b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return mHorizontalAxis.getCount(); 406e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 407e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 408e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 409e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * ColumnCount is used only to generate default column/column indices when 410e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * they are not specified by a component's layout parameters. 411e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 412e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param columnCount the number of columns. 413e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 414e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #getColumnCount() 415e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see LayoutParams#columnSpec 416e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 417e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_columnCount 418e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 419e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setColumnCount(int columnCount) { 420b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mHorizontalAxis.setCount(columnCount); 421e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateStructure(); 422e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet requestLayout(); 423e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 424e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 425e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 426e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns whether or not this GridLayout will allocate default margins when no 427e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * corresponding layout parameters are defined. 428e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 429e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return {@code true} if default margins should be allocated 430e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 431e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setUseDefaultMargins(boolean) 432e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 433e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_useDefaultMargins 434e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 435e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean getUseDefaultMargins() { 436b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return mUseDefaultMargins; 437e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 438e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 439e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 440e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When {@code true}, GridLayout allocates default margins around children 441e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * based on the child's visual characteristics. Each of the 442e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * margins so defined may be independently overridden by an assignment 443e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * to the appropriate layout parameter. 444e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 445e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When {@code false}, the default value of all margins is zero. 446e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 447e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When setting to {@code true}, consider setting the value of the 448e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link #setAlignmentMode(int) alignmentMode} 449e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * property to {@link #ALIGN_BOUNDS}. 450e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 451e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The default value of this property is {@code false}. 452e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 453e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param useDefaultMargins use {@code true} to make GridLayout allocate default margins 454e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 455e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #getUseDefaultMargins() 456e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setAlignmentMode(int) 457e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 458e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see MarginLayoutParams#leftMargin 459e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see MarginLayoutParams#topMargin 460e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see MarginLayoutParams#rightMargin 461e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see MarginLayoutParams#bottomMargin 462e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 463e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_useDefaultMargins 464e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 465e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setUseDefaultMargins(boolean useDefaultMargins) { 466b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell this.mUseDefaultMargins = useDefaultMargins; 467e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet requestLayout(); 468e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 469e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 470e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 471e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns the alignment mode. 472e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 473e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return the alignment mode; either {@link #ALIGN_BOUNDS} or {@link #ALIGN_MARGINS} 474e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 475e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #ALIGN_BOUNDS 476e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #ALIGN_MARGINS 477e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 478e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setAlignmentMode(int) 479e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 480e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_alignmentMode 481e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 482e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int getAlignmentMode() { 483b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return mAlignmentMode; 484e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 485e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 486e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 487e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Sets the alignment mode to be used for all of the alignments between the 488e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * children of this container. 489e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 490e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The default value of this property is {@link #ALIGN_MARGINS}. 491e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 492e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param alignmentMode either {@link #ALIGN_BOUNDS} or {@link #ALIGN_MARGINS} 493e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 494e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #ALIGN_BOUNDS 495e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #ALIGN_MARGINS 496e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 497e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #getAlignmentMode() 498e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 499e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_alignmentMode 500e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 501e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setAlignmentMode(int alignmentMode) { 502b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell this.mAlignmentMode = alignmentMode; 503e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet requestLayout(); 504e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 505e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 506e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 507e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns whether or not row boundaries are ordered by their grid indices. 508e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 509e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return {@code true} if row boundaries must appear in the order of their indices, 510e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code false} otherwise 511e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 512e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setRowOrderPreserved(boolean) 513e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 514e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_rowOrderPreserved 515e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 516e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean isRowOrderPreserved() { 517b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return mVerticalAxis.isOrderPreserved(); 518e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 519e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 520e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 521e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When this property is {@code true}, GridLayout is forced to place the row boundaries 522e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * so that their associated grid indices are in ascending order in the view. 523e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 524e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When this property is {@code false} GridLayout is at liberty to place the vertical row 525e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * boundaries in whatever order best fits the given constraints. 526e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 527e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The default value of this property is {@code true}. 528e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 529e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param rowOrderPreserved {@code true} to force GridLayout to respect the order 530e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * of row boundaries 531e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 532e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #isRowOrderPreserved() 533e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 534e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_rowOrderPreserved 535e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 536e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setRowOrderPreserved(boolean rowOrderPreserved) { 537b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mVerticalAxis.setOrderPreserved(rowOrderPreserved); 538e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateStructure(); 539e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet requestLayout(); 540e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 541e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 542e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 543e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns whether or not column boundaries are ordered by their grid indices. 544e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 545e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return {@code true} if column boundaries must appear in the order of their indices, 546e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code false} otherwise 547e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 548e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #setColumnOrderPreserved(boolean) 549e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 550e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_columnOrderPreserved 551e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 552e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean isColumnOrderPreserved() { 553b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return mHorizontalAxis.isOrderPreserved(); 554e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 555e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 556e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 557e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When this property is {@code true}, GridLayout is forced to place the column boundaries 558e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * so that their associated grid indices are in ascending order in the view. 559e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 560e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * When this property is {@code false} GridLayout is at liberty to place the horizontal column 561e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * boundaries in whatever order best fits the given constraints. 562e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 563e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The default value of this property is {@code true}. 564e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 565e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param columnOrderPreserved use {@code true} to force GridLayout to respect the order 566e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * of column boundaries. 567e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 568e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see #isColumnOrderPreserved() 569e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 570e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_columnOrderPreserved 571e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 572e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setColumnOrderPreserved(boolean columnOrderPreserved) { 573b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mHorizontalAxis.setOrderPreserved(columnOrderPreserved); 574e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateStructure(); 575e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet requestLayout(); 576e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 577e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 5782c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio /** 5792c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * Return the printer that will log diagnostics from this layout. 5802c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 5812c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * @see #setPrinter(android.util.Printer) 5822c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 5832c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * @return the printer associated with this view 5842c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio */ 5852c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public Printer getPrinter() { 586b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return mPrinter; 5872c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 5882c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 5892c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio /** 5902c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * Set the printer that will log diagnostics from this layout. 5912c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * The default value is created by {@link android.util.LogPrinter}. 5922c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 5932c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * @param printer the printer associated with this layout 5942c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 5952c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * @see #getPrinter() 5962c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio */ 5972c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public void setPrinter(Printer printer) { 598b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell this.mPrinter = (printer == null) ? NO_PRINTER : printer; 5992c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 6002c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 601e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Static utility methods 602e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 603e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static int max2(int[] a, int valueIfEmpty) { 604e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int result = valueIfEmpty; 605e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = a.length; i < N; i++) { 606e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result = Math.max(result, a[i]); 607e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 608e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 609e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 610e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 611e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @SuppressWarnings("unchecked") 612e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static <T> T[] append(T[] a, T[] b) { 613e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet T[] result = (T[]) Array.newInstance(a.getClass().getComponentType(), a.length + b.length); 614e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet System.arraycopy(a, 0, result, 0, a.length); 615e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet System.arraycopy(b, 0, result, a.length, b.length); 616e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 617e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 618e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 619e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static Alignment getAlignment(int gravity, boolean horizontal) { 620e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int mask = horizontal ? HORIZONTAL_GRAVITY_MASK : VERTICAL_GRAVITY_MASK; 621e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int shift = horizontal ? AXIS_X_SHIFT : AXIS_Y_SHIFT; 622e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int flags = (gravity & mask) >> shift; 623e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet switch (flags) { 624e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case (AXIS_SPECIFIED | AXIS_PULL_BEFORE): 6252c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return horizontal ? LEFT : TOP; 626e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case (AXIS_SPECIFIED | AXIS_PULL_AFTER): 6272c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return horizontal ? RIGHT : BOTTOM; 628e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case (AXIS_SPECIFIED | AXIS_PULL_BEFORE | AXIS_PULL_AFTER): 629e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return FILL; 630e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case AXIS_SPECIFIED: 631e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return CENTER; 632b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell case (AXIS_SPECIFIED | AXIS_PULL_BEFORE | GravityCompat.RELATIVE_LAYOUT_DIRECTION): 633e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return START; 634b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell case (AXIS_SPECIFIED | AXIS_PULL_AFTER | GravityCompat.RELATIVE_LAYOUT_DIRECTION): 635e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return END; 636e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet default: 637e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return UNDEFINED_ALIGNMENT; 638e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 639e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 640e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 641e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** @noinspection UnusedParameters*/ 642e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int getDefaultMargin(View c, boolean horizontal, boolean leading) { 643b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (c.getClass() == android.support.v7.widget.Space.class) { 644e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return 0; 645e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 646b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return mDefaultGap / 2; 647e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 648e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 649e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int getDefaultMargin(View c, boolean isAtEdge, boolean horizontal, boolean leading) { 6502c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return /*isAtEdge ? DEFAULT_CONTAINER_MARGIN :*/ getDefaultMargin(c, horizontal, leading); 651e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 652e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 6532c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio private int getDefaultMargin(View c, LayoutParams p, boolean horizontal, boolean leading) { 654b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (!mUseDefaultMargins) { 655e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return 0; 656e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 657e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec spec = horizontal ? p.columnSpec : p.rowSpec; 658b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell Axis axis = horizontal ? mHorizontalAxis : mVerticalAxis; 659e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval span = spec.span; 660b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell boolean leading1 = (horizontal && isLayoutRtlCompat()) ? !leading : leading; 661e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet boolean isAtEdge = leading1 ? (span.min == 0) : (span.max == axis.getCount()); 662e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 663e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return getDefaultMargin(c, isAtEdge, horizontal, leading); 664e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 665e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 666e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int getMargin1(View view, boolean horizontal, boolean leading) { 667e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams lp = getLayoutParams(view); 668e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int margin = horizontal ? 669e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet (leading ? lp.leftMargin : lp.rightMargin) : 670e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet (leading ? lp.topMargin : lp.bottomMargin); 6712c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return margin == UNDEFINED ? getDefaultMargin(view, lp, horizontal, leading) : margin; 672e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 673e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 674b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell private boolean isLayoutRtlCompat() { 675b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return ViewCompat.getLayoutDirection(this) == ViewCompat.LAYOUT_DIRECTION_RTL; 676b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell } 677b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell 678e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int getMargin(View view, boolean horizontal, boolean leading) { 679b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (mAlignmentMode == ALIGN_MARGINS) { 680e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return getMargin1(view, horizontal, leading); 681e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } else { 682b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell Axis axis = horizontal ? mHorizontalAxis : mVerticalAxis; 683e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int[] margins = leading ? axis.getLeadingMargins() : axis.getTrailingMargins(); 684e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams lp = getLayoutParams(view); 685e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec spec = horizontal ? lp.columnSpec : lp.rowSpec; 686e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int index = leading ? spec.span.min : spec.span.max; 687e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return margins[index]; 688e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 689e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 690e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 691e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int getTotalMargin(View child, boolean horizontal) { 692e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return getMargin(child, horizontal, true) + getMargin(child, horizontal, false); 693e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 694e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 695e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static boolean fits(int[] a, int value, int start, int end) { 696e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (end > a.length) { 697e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 698e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 699e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = start; i < end; i++) { 700e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (a[i] > value) { 701e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 702e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 703e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 704e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return true; 705e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 706e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 707e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static void procrusteanFill(int[] a, int start, int end, int value) { 708e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int length = a.length; 709e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arrays.fill(a, Math.min(start, length), Math.min(end, length), value); 710e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 711e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 712e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static void setCellGroup(LayoutParams lp, int row, int rowSpan, int col, int colSpan) { 713e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet lp.setRowSpecSpan(new Interval(row, row + rowSpan)); 714e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet lp.setColumnSpecSpan(new Interval(col, col + colSpan)); 715e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 716e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 717e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Logic to avert infinite loops by ensuring that the cells can be placed somewhere. 718e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static int clip(Interval minorRange, boolean minorWasDefined, int count) { 719e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int size = minorRange.size(); 720e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (count == 0) { 721e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return size; 722e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 723e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int min = minorWasDefined ? min(minorRange.min, count) : 0; 724e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return min(size, count - min); 725e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 726e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 727e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // install default indices for cells that don't define them 728e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void validateLayoutParams() { 729b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell final boolean horizontal = (mOrientation == HORIZONTAL); 730b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell final Axis axis = horizontal ? mHorizontalAxis : mVerticalAxis; 731e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final int count = (axis.definedCount != UNDEFINED) ? axis.definedCount : 0; 732e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 733e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int major = 0; 734e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int minor = 0; 735e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int[] maxSizes = new int[count]; 736e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 737e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = getChildCount(); i < N; i++) { 738e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams lp = (LayoutParams) getChildAt(i).getLayoutParams(); 739e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 740e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final Spec majorSpec = horizontal ? lp.rowSpec : lp.columnSpec; 741e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final Interval majorRange = majorSpec.span; 742e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final boolean majorWasDefined = majorSpec.startDefined; 743e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final int majorSpan = majorRange.size(); 744e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (majorWasDefined) { 745e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet major = majorRange.min; 746e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 747e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 748e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final Spec minorSpec = horizontal ? lp.columnSpec : lp.rowSpec; 749e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final Interval minorRange = minorSpec.span; 750e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final boolean minorWasDefined = minorSpec.startDefined; 751e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final int minorSpan = clip(minorRange, minorWasDefined, count); 752e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (minorWasDefined) { 753e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet minor = minorRange.min; 754e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 755e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 756e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (count != 0) { 757e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Find suitable row/col values when at least one is undefined. 758e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!majorWasDefined || !minorWasDefined) { 759e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet while (!fits(maxSizes, major, minor, minor + minorSpan)) { 760e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (minorWasDefined) { 761e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet major++; 762e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } else { 763e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (minor + minorSpan <= count) { 764e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet minor++; 765e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } else { 766e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet minor = 0; 767e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet major++; 768e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 769e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 770e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 771e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 772e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet procrusteanFill(maxSizes, minor, minor + minorSpan, major + majorSpan); 773e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 774e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 775e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (horizontal) { 776e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setCellGroup(lp, major, majorSpan, minor, minorSpan); 777e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } else { 778e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setCellGroup(lp, minor, minorSpan, major, majorSpan); 779e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 780e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 781e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet minor = minor + minorSpan; 782e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 783e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 784e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 785e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void invalidateStructure() { 786b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mLastLayoutParamsHashCode = UNINITIALIZED_HASH; 787b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (mHorizontalAxis != null) mHorizontalAxis.invalidateStructure(); 788b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (mVerticalAxis != null) mVerticalAxis.invalidateStructure(); 789e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // This can end up being done twice. Better twice than not at all. 790e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateValues(); 791e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 792e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 793e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void invalidateValues() { 794e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Need null check because requestLayout() is called in View's initializer, 795e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // before we are set up. 796b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (mHorizontalAxis != null && mVerticalAxis != null) { 797b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mHorizontalAxis.invalidateValues(); 798b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mVerticalAxis.invalidateValues(); 7992c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 800e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 801e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 802e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final LayoutParams getLayoutParams(View c) { 803e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return (LayoutParams) c.getLayoutParams(); 804e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 805e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 8062c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio private static void handleInvalidParams(String msg) { 8072c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio throw new IllegalArgumentException(msg + ". "); 8082c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 8092c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 8102c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio private void checkLayoutParams(LayoutParams lp, boolean horizontal) { 8112c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio String groupName = horizontal ? "column" : "row"; 8122c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio Spec spec = horizontal ? lp.columnSpec : lp.rowSpec; 8132c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio Interval span = spec.span; 8142c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio if (span.min != UNDEFINED && span.min < 0) { 8152c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio handleInvalidParams(groupName + " indices must be positive"); 8162c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 817b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell Axis axis = horizontal ? mHorizontalAxis : mVerticalAxis; 8182c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int count = axis.definedCount; 8192c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio if (count != UNDEFINED) { 8202c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio if (span.max > count) { 8212c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio handleInvalidParams(groupName + 8222c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio " indices (start + span) mustn't exceed the " + groupName + " count"); 8232c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 8242c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio if (span.size() > count) { 8252c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio handleInvalidParams(groupName + " span mustn't exceed the " + groupName + " count"); 8262c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 8272c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 8282c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 8292c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 8302c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio @Override 8312c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { 8322c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio if (!(p instanceof LayoutParams)) { 8332c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return false; 8342c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 8352c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio LayoutParams lp = (LayoutParams) p; 8362c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 8372c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio checkLayoutParams(lp, true); 8382c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio checkLayoutParams(lp, false); 8392c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 8402c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return true; 8412c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 8422c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 843e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 844e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected LayoutParams generateDefaultLayoutParams() { 845e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new LayoutParams(); 846e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 847e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 848e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 849e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public LayoutParams generateLayoutParams(AttributeSet attrs) { 850e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new LayoutParams(getContext(), attrs); 851e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 852e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 853e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 854e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { 855e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new LayoutParams(p); 856e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 857e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 858e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Draw grid 859e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 860e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void drawLine(Canvas graphics, int x1, int y1, int x2, int y2, Paint paint) { 861b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (isLayoutRtlCompat()) { 862e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int width = getWidth(); 8632c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio graphics.drawLine(width - x1, y1, width - x2, y2, paint); 864e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } else { 8652c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio graphics.drawLine(x1, y1, x2, y2, paint); 866e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 867e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 868e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 869e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int computeLayoutParamsHashCode() { 870e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int result = 1; 871e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = getChildCount(); i < N; i++) { 872e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet View c = getChildAt(i); 873e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (c.getVisibility() == View.GONE) continue; 874e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams lp = (LayoutParams) c.getLayoutParams(); 875e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result = 31 * result + lp.hashCode(); 876e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 877e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 878e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 879e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 8802c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio private void consistencyCheck() { 881b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (mLastLayoutParamsHashCode == UNINITIALIZED_HASH) { 8822c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio validateLayoutParams(); 883b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mLastLayoutParamsHashCode = computeLayoutParamsHashCode(); 884b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell } else if (mLastLayoutParamsHashCode != computeLayoutParamsHashCode()) { 885b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mPrinter.println("The fields of some layout parameters were modified in between " 8862c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio + "layout operations. Check the javadoc for GridLayout.LayoutParams#rowSpec."); 887e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateStructure(); 8882c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio consistencyCheck(); 889e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 890e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 891e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 892e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Measurement 893e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 8942c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio // Note: padding has already been removed from the supplied specs 895e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void measureChildWithMargins2(View child, int parentWidthSpec, int parentHeightSpec, 896e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int childWidth, int childHeight) { 897e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int childWidthSpec = getChildMeasureSpec(parentWidthSpec, 8982c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio getTotalMargin(child, true), childWidth); 899e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int childHeightSpec = getChildMeasureSpec(parentHeightSpec, 9002c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio getTotalMargin(child, false), childHeight); 901e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet child.measure(childWidthSpec, childHeightSpec); 902e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 903e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 9042c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio // Note: padding has already been removed from the supplied specs 905e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void measureChildrenWithMargins(int widthSpec, int heightSpec, boolean firstPass) { 906e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = getChildCount(); i < N; i++) { 907e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet View c = getChildAt(i); 908e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (c.getVisibility() == View.GONE) continue; 909e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams lp = getLayoutParams(c); 910e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (firstPass) { 911e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet measureChildWithMargins2(c, widthSpec, heightSpec, lp.width, lp.height); 912e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } else { 913b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell boolean horizontal = (mOrientation == HORIZONTAL); 914e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec spec = horizontal ? lp.columnSpec : lp.rowSpec; 915e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (spec.alignment == FILL) { 916e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval span = spec.span; 917b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell Axis axis = horizontal ? mHorizontalAxis : mVerticalAxis; 918e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int[] locations = axis.getLocations(); 919e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int cellSize = locations[span.max] - locations[span.min]; 920e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int viewSize = cellSize - getTotalMargin(c, horizontal); 921e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (horizontal) { 922e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet measureChildWithMargins2(c, widthSpec, heightSpec, viewSize, lp.height); 923e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } else { 924e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet measureChildWithMargins2(c, widthSpec, heightSpec, lp.width, viewSize); 925e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 926e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 927e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 928e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 929e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 930e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 9312c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio static int adjust(int measureSpec, int delta) { 9322c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return makeMeasureSpec( 9332c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio MeasureSpec.getSize(measureSpec + delta), MeasureSpec.getMode(measureSpec)); 9342c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 9352c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 936e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 937e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected void onMeasure(int widthSpec, int heightSpec) { 9382c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio consistencyCheck(); 939e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 940e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** If we have been called by {@link View#measure(int, int)}, one of width or height 941e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * is likely to have changed. We must invalidate if so. */ 942e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateValues(); 943e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 9442c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int hPadding = getPaddingLeft() + getPaddingRight(); 9452c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int vPadding = getPaddingTop() + getPaddingBottom(); 9462c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 9472c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int widthSpecSansPadding = adjust( widthSpec, -hPadding); 9482c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int heightSpecSansPadding = adjust(heightSpec, -vPadding); 949e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 9502c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio measureChildrenWithMargins(widthSpecSansPadding, heightSpecSansPadding, true); 9512c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 9522c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int widthSansPadding; 9532c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int heightSansPadding; 954e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 955e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Use the orientation property to decide which axis should be laid out first. 956b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell if (mOrientation == HORIZONTAL) { 957b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell widthSansPadding = mHorizontalAxis.getMeasure(widthSpecSansPadding); 9582c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio measureChildrenWithMargins(widthSpecSansPadding, heightSpecSansPadding, false); 959b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell heightSansPadding = mVerticalAxis.getMeasure(heightSpecSansPadding); 960e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } else { 961b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell heightSansPadding = mVerticalAxis.getMeasure(heightSpecSansPadding); 9622c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio measureChildrenWithMargins(widthSpecSansPadding, heightSpecSansPadding, false); 963b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell widthSansPadding = mHorizontalAxis.getMeasure(widthSpecSansPadding); 964e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 965e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 9662c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int measuredWidth = Math.max(widthSansPadding + hPadding, getSuggestedMinimumWidth()); 9672c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int measuredHeight = Math.max(heightSansPadding + vPadding, getSuggestedMinimumHeight()); 968e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 969e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setMeasuredDimension( 970b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell ViewCompat.resolveSizeAndState(measuredWidth, widthSpec, 0), 971b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell ViewCompat.resolveSizeAndState(measuredHeight, heightSpec, 0)); 972e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 973e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 974e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int getMeasurement(View c, boolean horizontal) { 975e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return horizontal ? c.getMeasuredWidth() : c.getMeasuredHeight(); 976e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 977e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 978e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final int getMeasurementIncludingMargin(View c, boolean horizontal) { 979e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (c.getVisibility() == View.GONE) { 980e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return 0; 981e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 982e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return getMeasurement(c, horizontal) + getTotalMargin(c, horizontal); 983e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 984e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 985e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 986e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void requestLayout() { 987e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet super.requestLayout(); 988b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell invalidateStructure(); 989e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 990e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 991e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final Alignment getAlignment(Alignment alignment, boolean horizontal) { 992e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return (alignment != UNDEFINED_ALIGNMENT) ? alignment : 993e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet (horizontal ? START : BASELINE); 994e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 995e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 996e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Layout container 997e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 998e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 999e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@inheritDoc} 1000e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1001e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 1002e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet The layout operation is implemented by delegating the heavy lifting to the 1003e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet to the mHorizontalAxis and mVerticalAxis instances of the internal Axis class. 1004e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Together they compute the locations of the vertical and horizontal lines of 1005e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet the grid (respectively!). 1006e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1007e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet This method is then left with the simpler task of applying margins, gravity 1008e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet and sizing to each child view and then placing it in its cell. 1009e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1010e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 1011e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 10122c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio consistencyCheck(); 1013e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1014e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int targetWidth = right - left; 1015e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int targetHeight = bottom - top; 1016e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1017e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int paddingLeft = getPaddingLeft(); 1018e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int paddingTop = getPaddingTop(); 1019e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int paddingRight = getPaddingRight(); 1020e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int paddingBottom = getPaddingBottom(); 1021e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1022b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mHorizontalAxis.layout(targetWidth - paddingLeft - paddingRight); 1023b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mVerticalAxis.layout(targetHeight - paddingTop - paddingBottom); 1024e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1025b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell int[] hLocations = mHorizontalAxis.getLocations(); 1026b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell int[] vLocations = mVerticalAxis.getLocations(); 1027e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1028e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = getChildCount(); i < N; i++) { 1029e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet View c = getChildAt(i); 1030e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (c.getVisibility() == View.GONE) continue; 1031e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams lp = getLayoutParams(c); 1032e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec columnSpec = lp.columnSpec; 1033e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec rowSpec = lp.rowSpec; 1034e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1035e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval colSpan = columnSpec.span; 1036e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval rowSpan = rowSpec.span; 1037e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1038e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int x1 = hLocations[colSpan.min]; 1039e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int y1 = vLocations[rowSpan.min]; 1040e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1041e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int x2 = hLocations[colSpan.max]; 1042e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int y2 = vLocations[rowSpan.max]; 1043e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1044e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int cellWidth = x2 - x1; 1045e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int cellHeight = y2 - y1; 1046e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1047e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int pWidth = getMeasurement(c, true); 1048e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int pHeight = getMeasurement(c, false); 1049e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1050e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Alignment hAlign = getAlignment(columnSpec.alignment, true); 1051e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Alignment vAlign = getAlignment(rowSpec.alignment, false); 1052e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1053b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell Bounds boundsX = mHorizontalAxis.getGroupBounds().getValue(i); 1054b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell Bounds boundsY = mVerticalAxis.getGroupBounds().getValue(i); 1055e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1056e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Gravity offsets: the location of the alignment group relative to its cell group. 1057e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int gravityOffsetX = hAlign.getGravityOffset(c, cellWidth - boundsX.size(true)); 1058e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int gravityOffsetY = vAlign.getGravityOffset(c, cellHeight - boundsY.size(true)); 1059e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1060e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int leftMargin = getMargin(c, true, true); 1061e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int topMargin = getMargin(c, false, true); 1062e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int rightMargin = getMargin(c, true, false); 1063e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int bottomMargin = getMargin(c, false, false); 1064e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 10652c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int sumMarginsX = leftMargin + rightMargin; 10662c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int sumMarginsY = topMargin + bottomMargin; 10672c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio 1068e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Alignment offsets: the location of the view relative to its alignment group. 10692c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int alignmentOffsetX = boundsX.getOffset(this, c, hAlign, pWidth + sumMarginsX, true); 10702c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int alignmentOffsetY = boundsY.getOffset(this, c, vAlign, pHeight + sumMarginsY, false); 1071e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 10722c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int width = hAlign.getSizeInCell(c, pWidth, cellWidth - sumMarginsX); 10732c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int height = vAlign.getSizeInCell(c, pHeight, cellHeight - sumMarginsY); 1074e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1075e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int dx = x1 + gravityOffsetX + alignmentOffsetX; 1076e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1077b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell int cx = !isLayoutRtlCompat() ? paddingLeft + leftMargin + dx : 1078e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet targetWidth - width - paddingRight - rightMargin - dx; 1079e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int cy = paddingTop + y1 + gravityOffsetY + alignmentOffsetY + topMargin; 1080e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1081e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (width != c.getMeasuredWidth() || height != c.getMeasuredHeight()) { 1082e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet c.measure(makeMeasureSpec(width, EXACTLY), makeMeasureSpec(height, EXACTLY)); 1083e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1084e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet c.layout(cx, cy, cx + width, cy + height); 1085e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1086e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1087e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1088e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Inner classes 1089e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1090e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 1091e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet This internal class houses the algorithm for computing the locations of grid lines; 1092e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet along either the horizontal or vertical axis. A GridLayout uses two instances of this class - 1093e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet distinguished by the "horizontal" flag which is true for the horizontal axis and false 1094e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for the vertical one. 1095e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1096e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final class Axis { 1097e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int NEW = 0; 1098e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int PENDING = 1; 1099e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int COMPLETE = 2; 1100e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1101e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public final boolean horizontal; 1102e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1103e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int definedCount = UNDEFINED; 1104e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int maxIndex = UNDEFINED; 1105e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1106e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet PackedMap<Spec, Bounds> groupBounds; 1107e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean groupBoundsValid = false; 1108e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1109e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet PackedMap<Interval, MutableInt> forwardLinks; 1110e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean forwardLinksValid = false; 1111e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1112e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet PackedMap<Interval, MutableInt> backwardLinks; 1113e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean backwardLinksValid = false; 1114e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1115e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int[] leadingMargins; 1116e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean leadingMarginsValid = false; 1117e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1118e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int[] trailingMargins; 1119e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean trailingMarginsValid = false; 1120e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1121e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public Arc[] arcs; 1122e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean arcsValid = false; 1123e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1124e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int[] locations; 1125e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean locationsValid = false; 1126e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1127e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet boolean orderPreserved = DEFAULT_ORDER_PRESERVED; 1128e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1129e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private MutableInt parentMin = new MutableInt(0); 1130e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private MutableInt parentMax = new MutableInt(-MAX_SIZE); 1131e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1132e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private Axis(boolean horizontal) { 1133e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.horizontal = horizontal; 1134e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1135e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1136e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int calculateMaxIndex() { 1137e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // the number Integer.MIN_VALUE + 1 comes up in undefined cells 1138e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int result = -1; 1139e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = getChildCount(); i < N; i++) { 1140e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet View c = getChildAt(i); 1141e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams params = getLayoutParams(c); 1142e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec spec = horizontal ? params.columnSpec : params.rowSpec; 1143e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval span = spec.span; 1144e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result = max(result, span.min); 1145e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result = max(result, span.max); 11462c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio result = max(result, span.size()); 1147e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1148e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result == -1 ? UNDEFINED : result; 1149e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1150e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1151e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int getMaxIndex() { 1152e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (maxIndex == UNDEFINED) { 1153e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet maxIndex = max(0, calculateMaxIndex()); // use zero when there are no children 1154e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1155e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return maxIndex; 1156e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1157e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1158e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int getCount() { 1159e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return max(definedCount, getMaxIndex()); 1160e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1161e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1162e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setCount(int count) { 11632c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio if (count != UNDEFINED && count < getMaxIndex()) { 11642c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio handleInvalidParams((horizontal ? "column" : "row") + 11652c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio "Count must be greater than or equal to the maximum of all grid indices " + 11662c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio "(and spans) defined in the LayoutParams of each child"); 11672c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 1168e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.definedCount = count; 1169e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1170e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1171e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean isOrderPreserved() { 1172e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return orderPreserved; 1173e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1174e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1175e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setOrderPreserved(boolean orderPreserved) { 1176e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.orderPreserved = orderPreserved; 1177e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateStructure(); 1178e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1179e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1180e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private PackedMap<Spec, Bounds> createGroupBounds() { 1181e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Assoc<Spec, Bounds> assoc = Assoc.of(Spec.class, Bounds.class); 1182e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = getChildCount(); i < N; i++) { 1183e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet View c = getChildAt(i); 11842c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio // we must include views that are GONE here, see introductory javadoc 1185e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams lp = getLayoutParams(c); 1186e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec spec = horizontal ? lp.columnSpec : lp.rowSpec; 1187e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Bounds bounds = getAlignment(spec.alignment, horizontal).getBounds(); 1188e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet assoc.put(spec, bounds); 1189e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1190e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return assoc.pack(); 1191e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1192e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1193e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void computeGroupBounds() { 1194e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Bounds[] values = groupBounds.values; 1195e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < values.length; i++) { 1196e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet values[i].reset(); 1197e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1198e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = getChildCount(); i < N; i++) { 1199e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet View c = getChildAt(i); 12002c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio // we must include views that are GONE here, see introductory javadoc 1201e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams lp = getLayoutParams(c); 1202e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec spec = horizontal ? lp.columnSpec : lp.rowSpec; 12032c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio groupBounds.getValue(i).include(GridLayout.this, c, spec, this); 1204e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1205e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1206e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1207e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public PackedMap<Spec, Bounds> getGroupBounds() { 1208e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (groupBounds == null) { 1209e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet groupBounds = createGroupBounds(); 1210e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1211e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!groupBoundsValid) { 1212e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet computeGroupBounds(); 1213e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet groupBoundsValid = true; 1214e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1215e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return groupBounds; 1216e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1217e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1218e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Add values computed by alignment - taking the max of all alignments in each span 1219e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private PackedMap<Interval, MutableInt> createLinks(boolean min) { 1220e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Assoc<Interval, MutableInt> result = Assoc.of(Interval.class, MutableInt.class); 1221e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec[] keys = getGroupBounds().keys; 1222e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = keys.length; i < N; i++) { 1223e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval span = min ? keys[i].span : keys[i].span.inverse(); 1224e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result.put(span, new MutableInt()); 1225e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1226e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result.pack(); 1227e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1228e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1229e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void computeLinks(PackedMap<Interval, MutableInt> links, boolean min) { 1230e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet MutableInt[] spans = links.values; 1231e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < spans.length; i++) { 1232e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet spans[i].reset(); 1233e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1234e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1235e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Use getter to trigger a re-evaluation 1236e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Bounds[] bounds = getGroupBounds().values; 1237e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < bounds.length; i++) { 1238e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int size = bounds[i].size(min); 1239e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet MutableInt valueHolder = links.getValue(i); 1240e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // this effectively takes the max() of the minima and the min() of the maxima 1241e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet valueHolder.value = max(valueHolder.value, min ? size : -size); 1242e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1243e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1244e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1245e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private PackedMap<Interval, MutableInt> getForwardLinks() { 1246e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (forwardLinks == null) { 1247e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet forwardLinks = createLinks(true); 1248e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1249e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!forwardLinksValid) { 1250e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet computeLinks(forwardLinks, true); 1251e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet forwardLinksValid = true; 1252e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1253e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return forwardLinks; 1254e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1255e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1256e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private PackedMap<Interval, MutableInt> getBackwardLinks() { 1257e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (backwardLinks == null) { 1258e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet backwardLinks = createLinks(false); 1259e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1260e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!backwardLinksValid) { 1261e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet computeLinks(backwardLinks, false); 1262e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet backwardLinksValid = true; 1263e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1264e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return backwardLinks; 1265e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1266e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1267e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void include(List<Arc> arcs, Interval key, MutableInt size, 1268e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet boolean ignoreIfAlreadyPresent) { 1269e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 1270e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Remove self referential links. 1271e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet These appear: 1272e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet . as parental constraints when GridLayout has no children 1273e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet . when components have been marked as GONE 1274e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1275e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (key.size() == 0) { 1276e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return; 1277e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1278e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // this bit below should really be computed outside here - 1279e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // its just to stop default (row/col > 0) constraints obliterating valid entries 1280e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (ignoreIfAlreadyPresent) { 1281e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (Arc arc : arcs) { 1282e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval span = arc.span; 1283e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (span.equals(key)) { 1284e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return; 1285e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1286e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1287e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1288e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet arcs.add(new Arc(key, size)); 1289e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1290e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1291e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void include(List<Arc> arcs, Interval key, MutableInt size) { 1292e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet include(arcs, key, size, true); 1293e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1294e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1295e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Group arcs by their first vertex, returning an array of arrays. 1296e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // This is linear in the number of arcs. 1297e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arc[][] groupArcsByFirstVertex(Arc[] arcs) { 1298e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int N = getCount() + 1; // the number of vertices 1299e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arc[][] result = new Arc[N][]; 1300e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int[] sizes = new int[N]; 1301e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (Arc arc : arcs) { 1302e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet sizes[arc.span.min]++; 1303e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1304e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < sizes.length; i++) { 1305e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result[i] = new Arc[sizes[i]]; 1306e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1307e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // reuse the sizes array to hold the current last elements as we insert each arc 1308e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arrays.fill(sizes, 0); 1309e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (Arc arc : arcs) { 1310e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int i = arc.span.min; 1311e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result[i][sizes[i]++] = arc; 1312e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1313e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1314e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 1315e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1316e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1317e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private Arc[] topologicalSort(final Arc[] arcs) { 1318e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new Object() { 1319e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arc[] result = new Arc[arcs.length]; 1320e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int cursor = result.length - 1; 1321e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arc[][] arcsByVertex = groupArcsByFirstVertex(arcs); 1322e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int[] visited = new int[getCount() + 1]; 1323e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1324e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet void walk(int loc) { 1325e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet switch (visited[loc]) { 1326e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case NEW: { 1327e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet visited[loc] = PENDING; 1328e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (Arc arc : arcsByVertex[loc]) { 1329e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet walk(arc.span.max); 1330e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result[cursor--] = arc; 1331e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1332e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet visited[loc] = COMPLETE; 1333e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet break; 1334e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1335e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case PENDING: { 13362c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio // le singe est dans l'arbre 1337e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet assert false; 1338e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet break; 1339e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1340e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case COMPLETE: { 1341e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet break; 1342e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1343e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1344e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1345e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1346e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arc[] sort() { 1347e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int loc = 0, N = arcsByVertex.length; loc < N; loc++) { 1348e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet walk(loc); 1349e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1350e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet assert cursor == -1; 1351e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 1352e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1353e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet }.sort(); 1354e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1355e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1356e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private Arc[] topologicalSort(List<Arc> arcs) { 1357e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return topologicalSort(arcs.toArray(new Arc[arcs.size()])); 1358e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1359e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1360e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void addComponentSizes(List<Arc> result, PackedMap<Interval, MutableInt> links) { 1361e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < links.keys.length; i++) { 1362e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval key = links.keys[i]; 1363e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet include(result, key, links.values[i], false); 1364e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1365e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1366e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1367e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private Arc[] createArcs() { 1368e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet List<Arc> mins = new ArrayList<Arc>(); 1369e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet List<Arc> maxs = new ArrayList<Arc>(); 1370e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1371e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Add the minimum values from the components. 1372e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet addComponentSizes(mins, getForwardLinks()); 1373e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Add the maximum values from the components. 1374e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet addComponentSizes(maxs, getBackwardLinks()); 1375e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1376e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Add ordering constraints to prevent row/col sizes from going negative 1377e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (orderPreserved) { 1378e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Add a constraint for every row/col 1379e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < getCount(); i++) { 1380e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet include(mins, new Interval(i, i + 1), new MutableInt(0)); 1381e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1382e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1383e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1384e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Add the container constraints. Use the version of include that allows 1385e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // duplicate entries in case a child spans the entire grid. 1386e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int N = getCount(); 1387e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet include(mins, new Interval(0, N), parentMin, false); 1388e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet include(maxs, new Interval(N, 0), parentMax, false); 1389e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1390e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Sort 1391e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arc[] sMins = topologicalSort(mins); 1392e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arc[] sMaxs = topologicalSort(maxs); 1393e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1394e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return append(sMins, sMaxs); 1395e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1396e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1397e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void computeArcs() { 1398e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // getting the links validates the values that are shared by the arc list 1399e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet getForwardLinks(); 1400e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet getBackwardLinks(); 1401e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1402e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1403e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public Arc[] getArcs() { 1404e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (arcs == null) { 1405e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet arcs = createArcs(); 1406e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1407e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!arcsValid) { 1408e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet computeArcs(); 1409e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet arcsValid = true; 1410e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1411e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return arcs; 1412e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1413e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1414e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private boolean relax(int[] locations, Arc entry) { 1415e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!entry.valid) { 1416e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 1417e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1418e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval span = entry.span; 1419e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int u = span.min; 1420e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int v = span.max; 1421e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int value = entry.value.value; 1422e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int candidate = locations[u] + value; 1423e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (candidate > locations[v]) { 1424e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet locations[v] = candidate; 1425e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return true; 1426e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1427e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 1428e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1429e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1430e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void init(int[] locations) { 1431e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arrays.fill(locations, 0); 1432e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1433e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1434e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private String arcsToString(List<Arc> arcs) { 1435e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet String var = horizontal ? "x" : "y"; 1436e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet StringBuilder result = new StringBuilder(); 1437e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet boolean first = true; 1438e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (Arc arc : arcs) { 1439e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (first) { 1440e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet first = false; 1441e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } else { 1442e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result = result.append(", "); 1443e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1444e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int src = arc.span.min; 1445e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int dst = arc.span.max; 1446e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int value = arc.value.value; 1447e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result.append((src < dst) ? 14482c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio var + dst + "-" + var + src + ">=" + value : 14492c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio var + src + "-" + var + dst + "<=" + -value); 1450e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1451e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1452e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result.toString(); 1453e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1454e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1455e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void logError(String axisName, Arc[] arcs, boolean[] culprits0) { 1456e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet List<Arc> culprits = new ArrayList<Arc>(); 1457e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet List<Arc> removed = new ArrayList<Arc>(); 1458e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int c = 0; c < arcs.length; c++) { 1459e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arc arc = arcs[c]; 1460e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (culprits0[c]) { 1461e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet culprits.add(arc); 1462e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1463e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!arc.valid) { 1464e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet removed.add(arc); 1465e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1466e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1467b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell mPrinter.println(axisName + " constraints: " + arcsToString(culprits) + 14682c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio " are inconsistent; permanently removing: " + arcsToString(removed) + ". "); 1469e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1470e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1471e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 1472e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Bellman-Ford variant - modified to reduce typical running time from O(N^2) to O(N) 1473e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1474e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet GridLayout converts its requirements into a system of linear constraints of the 1475e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet form: 1476e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1477e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet x[i] - x[j] < a[k] 1478e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1479e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Where the x[i] are variables and the a[k] are constants. 1480e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1481e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet For example, if the variables were instead labeled x, y, z we might have: 1482e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1483e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet x - y < 17 1484e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet y - z < 23 1485e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet z - x < 42 1486e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1487e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet This is a special case of the Linear Programming problem that is, in turn, 1488e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet equivalent to the single-source shortest paths problem on a digraph, for 1489e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet which the O(n^2) Bellman-Ford algorithm the most commonly used general solution. 1490e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1491e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void solve(Arc[] arcs, int[] locations) { 1492e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet String axisName = horizontal ? "horizontal" : "vertical"; 1493e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int N = getCount() + 1; // The number of vertices is the number of columns/rows + 1. 1494e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet boolean[] originalCulprits = null; 1495e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1496e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int p = 0; p < arcs.length; p++) { 1497e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet init(locations); 1498e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1499e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // We take one extra pass over traditional Bellman-Ford (and omit their final step) 1500e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < N; i++) { 1501e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet boolean changed = false; 1502e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int j = 0, length = arcs.length; j < length; j++) { 1503e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet changed |= relax(locations, arcs[j]); 1504e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1505e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!changed) { 1506e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (originalCulprits != null) { 1507e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet logError(axisName, arcs, originalCulprits); 1508e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1509e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return; 1510e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1511e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1512e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1513e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet boolean[] culprits = new boolean[arcs.length]; 1514e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < N; i++) { 1515e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int j = 0, length = arcs.length; j < length; j++) { 1516e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet culprits[j] |= relax(locations, arcs[j]); 1517e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1518e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1519e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1520e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (p == 0) { 1521e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet originalCulprits = culprits; 1522e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1523e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1524e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < arcs.length; i++) { 1525e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (culprits[i]) { 1526e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Arc arc = arcs[i]; 1527e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Only remove max values, min values alone cannot be inconsistent 1528e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (arc.span.min < arc.span.max) { 1529e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet continue; 1530e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1531e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet arc.valid = false; 1532e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet break; 1533e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1534e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1535e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1536e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1537e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1538e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void computeMargins(boolean leading) { 1539e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int[] margins = leading ? leadingMargins : trailingMargins; 1540e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = getChildCount(); i < N; i++) { 1541e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet View c = getChildAt(i); 1542e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (c.getVisibility() == View.GONE) continue; 1543e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams lp = getLayoutParams(c); 1544e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec spec = horizontal ? lp.columnSpec : lp.rowSpec; 1545e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval span = spec.span; 1546e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int index = leading ? span.min : span.max; 1547e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet margins[index] = max(margins[index], getMargin1(c, horizontal, leading)); 1548e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1549e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1550e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1551e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // External entry points 1552e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1553e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int[] getLeadingMargins() { 1554e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (leadingMargins == null) { 1555e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet leadingMargins = new int[getCount() + 1]; 1556e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1557e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!leadingMarginsValid) { 1558e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet computeMargins(true); 1559e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet leadingMarginsValid = true; 1560e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1561e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return leadingMargins; 1562e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1563e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1564e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int[] getTrailingMargins() { 1565e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (trailingMargins == null) { 1566e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet trailingMargins = new int[getCount() + 1]; 1567e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1568e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!trailingMarginsValid) { 1569e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet computeMargins(false); 1570e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet trailingMarginsValid = true; 1571e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1572e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return trailingMargins; 1573e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1574e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1575e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void computeLocations(int[] a) { 1576e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet solve(getArcs(), a); 1577e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!orderPreserved) { 1578e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Solve returns the smallest solution to the constraint system for which all 1579e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // values are positive. One value is therefore zero - though if the row/col 1580e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // order is not preserved this may not be the first vertex. For consistency, 1581e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // translate all the values so that they measure the distance from a[0]; the 1582e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // leading edge of the parent. After this transformation some values may be 1583e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // negative. 1584e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int a0 = a[0]; 1585e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0, N = a.length; i < N; i++) { 1586e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet a[i] = a[i] - a0; 1587e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1588e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1589e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1590e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1591e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int[] getLocations() { 1592e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (locations == null) { 1593e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int N = getCount() + 1; 1594e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet locations = new int[N]; 1595e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1596e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!locationsValid) { 1597e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet computeLocations(locations); 1598e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet locationsValid = true; 1599e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1600e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return locations; 1601e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1602e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1603e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int size(int[] locations) { 1604e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // The parental edges are attached to vertices 0 and N - even when order is not 1605e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // being preserved and other vertices fall outside this range. Measure the distance 1606e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // between vertices 0 and N, assuming that locations[0] = 0. 1607e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return locations[getCount()]; 1608e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1609e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1610e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void setParentConstraints(int min, int max) { 1611e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet parentMin.value = min; 1612e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet parentMax.value = -max; 1613e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet locationsValid = false; 1614e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1615e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1616e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int getMeasure(int min, int max) { 1617e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setParentConstraints(min, max); 1618e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return size(getLocations()); 1619e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1620e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1621e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int getMeasure(int measureSpec) { 1622e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int mode = MeasureSpec.getMode(measureSpec); 1623e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int size = MeasureSpec.getSize(measureSpec); 1624e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet switch (mode) { 1625e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case MeasureSpec.UNSPECIFIED: { 1626e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return getMeasure(0, MAX_SIZE); 1627e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1628e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case MeasureSpec.EXACTLY: { 1629e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return getMeasure(size, size); 1630e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1631e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet case MeasureSpec.AT_MOST: { 1632e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return getMeasure(0, size); 1633e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1634e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet default: { 1635e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet assert false; 1636e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return 0; 1637e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1638e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1639e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1640e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1641e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void layout(int size) { 1642e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setParentConstraints(size, size); 1643e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet getLocations(); 1644e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1645e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1646e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void invalidateStructure() { 1647e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet maxIndex = UNDEFINED; 1648e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1649e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet groupBounds = null; 1650e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet forwardLinks = null; 1651e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet backwardLinks = null; 1652e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1653e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet leadingMargins = null; 1654e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet trailingMargins = null; 1655e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet arcs = null; 1656e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1657e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet locations = null; 1658e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1659e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet invalidateValues(); 1660e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1661e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1662e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void invalidateValues() { 1663e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet groupBoundsValid = false; 1664e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet forwardLinksValid = false; 1665e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet backwardLinksValid = false; 1666e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1667e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet leadingMarginsValid = false; 1668e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet trailingMarginsValid = false; 1669e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet arcsValid = false; 1670e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1671e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet locationsValid = false; 1672e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1673e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1674e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1675e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1676e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Layout information associated with each of the children of a GridLayout. 1677e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 1678e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * GridLayout supports both row and column spanning and arbitrary forms of alignment within 1679e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * each cell group. The fundamental parameters associated with each cell group are 1680e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * gathered into their vertical and horizontal components and stored 1681e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * in the {@link #rowSpec} and {@link #columnSpec} layout parameters. 1682e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout.Spec Specs} are immutable structures 1683e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * and may be shared between the layout parameters of different children. 1684e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 1685e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The row and column specs contain the leading and trailing indices along each axis 1686e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * and together specify the four grid indices that delimit the cells of this cell group. 1687e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 1688e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The alignment properties of the row and column specs together specify 1689e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * both aspects of alignment within the cell group. It is also possible to specify a child's 1690e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * alignment within its cell group by using the {@link GridLayout.LayoutParams#setGravity(int)} 1691e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * method. 1692e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1693e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <h4>WRAP_CONTENT and MATCH_PARENT</h4> 1694e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1695e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Because the default values of the {@link #width} and {@link #height} 1696e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * properties are both {@link #WRAP_CONTENT}, this value never needs to be explicitly 1697e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * declared in the layout parameters of GridLayout's children. In addition, 1698e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * GridLayout does not distinguish the special size value {@link #MATCH_PARENT} from 1699e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link #WRAP_CONTENT}. A component's ability to expand to the size of the parent is 1700e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * instead controlled by the principle of <em>flexibility</em>, 1701e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * as discussed in {@link GridLayout}. 1702e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1703e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <h4>Summary</h4> 1704e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1705e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * You should not need to use either of the special size values: 1706e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code WRAP_CONTENT} or {@code MATCH_PARENT} when configuring the children of 1707e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * a GridLayout. 1708e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1709e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <h4>Default values</h4> 1710e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1711e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <ul> 1712e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #width} = {@link #WRAP_CONTENT}</li> 1713e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #height} = {@link #WRAP_CONTENT}</li> 1714e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #topMargin} = 0 when 1715e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout#setUseDefaultMargins(boolean) useDefaultMargins} is 1716e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code false}; otherwise {@link #UNDEFINED}, to 1717e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * indicate that a default value should be computed on demand. </li> 1718e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #leftMargin} = 0 when 1719e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout#setUseDefaultMargins(boolean) useDefaultMargins} is 1720e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code false}; otherwise {@link #UNDEFINED}, to 1721e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * indicate that a default value should be computed on demand. </li> 1722e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #bottomMargin} = 0 when 1723e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout#setUseDefaultMargins(boolean) useDefaultMargins} is 1724e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code false}; otherwise {@link #UNDEFINED}, to 1725e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * indicate that a default value should be computed on demand. </li> 1726e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #rightMargin} = 0 when 1727e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link GridLayout#setUseDefaultMargins(boolean) useDefaultMargins} is 1728e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code false}; otherwise {@link #UNDEFINED}, to 1729e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * indicate that a default value should be computed on demand. </li> 1730e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #rowSpec}<code>.row</code> = {@link #UNDEFINED} </li> 1731e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #rowSpec}<code>.rowSpan</code> = 1 </li> 1732e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #rowSpec}<code>.alignment</code> = {@link #BASELINE} </li> 1733e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #columnSpec}<code>.column</code> = {@link #UNDEFINED} </li> 1734e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #columnSpec}<code>.columnSpan</code> = 1 </li> 1735e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #columnSpec}<code>.alignment</code> = {@link #START} </li> 1736e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * </ul> 1737e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1738e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * See {@link GridLayout} for a more complete description of the conventions 1739e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * used by GridLayout in the interpretation of the properties of this class. 1740e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1741e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_Layout_layout_row 1742e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_Layout_layout_rowSpan 1743e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_Layout_layout_column 1744e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_Layout_layout_columnSpan 1745e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_Layout_layout_gravity 1746e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1747e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static class LayoutParams extends MarginLayoutParams { 1748e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1749e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Default values 1750e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1751e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int DEFAULT_WIDTH = WRAP_CONTENT; 1752e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int DEFAULT_HEIGHT = WRAP_CONTENT; 1753e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int DEFAULT_MARGIN = UNDEFINED; 1754e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int DEFAULT_ROW = UNDEFINED; 1755e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int DEFAULT_COLUMN = UNDEFINED; 1756e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final Interval DEFAULT_SPAN = new Interval(UNDEFINED, UNDEFINED + 1); 1757e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int DEFAULT_SPAN_SIZE = DEFAULT_SPAN.size(); 1758e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1759e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // TypedArray indices 1760e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1761e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int MARGIN = R.styleable.GridLayout_Layout_android_layout_margin; 1762e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int LEFT_MARGIN = R.styleable.GridLayout_Layout_android_layout_marginLeft; 1763e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int TOP_MARGIN = R.styleable.GridLayout_Layout_android_layout_marginTop; 1764e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int RIGHT_MARGIN = R.styleable.GridLayout_Layout_android_layout_marginRight; 1765e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int BOTTOM_MARGIN = R.styleable.GridLayout_Layout_android_layout_marginBottom; 1766e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1767e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int COLUMN = R.styleable.GridLayout_Layout_layout_column; 1768e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int COLUMN_SPAN = R.styleable.GridLayout_Layout_layout_columnSpan; 1769e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1770e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int ROW = R.styleable.GridLayout_Layout_layout_row; 1771e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int ROW_SPAN = R.styleable.GridLayout_Layout_layout_rowSpan; 1772e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1773e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int GRAVITY = R.styleable.GridLayout_Layout_layout_gravity; 1774e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1775e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Instance variables 1776e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1777e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1778e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The spec that defines the vertical characteristics of the cell group 1779e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * described by these layout parameters. 1780e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * If an assignment is made to this field after a measurement or layout operation 1781e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * has already taken place, a call to 1782e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link ViewGroup#setLayoutParams(ViewGroup.LayoutParams)} 1783e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * must be made to notify GridLayout of the change. GridLayout is normally able 1784e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * to detect when code fails to observe this rule, issue a warning and take steps to 1785e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * compensate for the omission. This facility is implemented on a best effort basis 1786e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * and should not be relied upon in production code - so it is best to include the above 1787e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * calls to remove the warnings as soon as it is practical. 1788e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1789e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public Spec rowSpec = Spec.UNDEFINED; 1790e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1791e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1792e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The spec that defines the horizontal characteristics of the cell group 1793e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * described by these layout parameters. 1794e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * If an assignment is made to this field after a measurement or layout operation 1795e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * has already taken place, a call to 1796e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link ViewGroup#setLayoutParams(ViewGroup.LayoutParams)} 1797e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * must be made to notify GridLayout of the change. GridLayout is normally able 1798e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * to detect when code fails to observe this rule, issue a warning and take steps to 1799e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * compensate for the omission. This facility is implemented on a best effort basis 1800e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * and should not be relied upon in production code - so it is best to include the above 1801e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * calls to remove the warnings as soon as it is practical. 1802e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1803e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public Spec columnSpec = Spec.UNDEFINED; 1804e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1805e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Constructors 1806e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1807e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private LayoutParams( 1808e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int width, int height, 1809e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int left, int top, int right, int bottom, 1810e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec rowSpec, Spec columnSpec) { 1811e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet super(width, height); 1812e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet setMargins(left, top, right, bottom); 1813e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.rowSpec = rowSpec; 1814e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.columnSpec = columnSpec; 1815e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1816e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1817e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1818e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Constructs a new LayoutParams instance for this <code>rowSpec</code> 1819e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * and <code>columnSpec</code>. All other fields are initialized with 1820e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * default values as defined in {@link LayoutParams}. 1821e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1822e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param rowSpec the rowSpec 1823e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param columnSpec the columnSpec 1824e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1825e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public LayoutParams(Spec rowSpec, Spec columnSpec) { 1826e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this(DEFAULT_WIDTH, DEFAULT_HEIGHT, 1827e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN, DEFAULT_MARGIN, 1828e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet rowSpec, columnSpec); 1829e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1830e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1831e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1832e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Constructs a new LayoutParams with default values as defined in {@link LayoutParams}. 1833e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1834e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public LayoutParams() { 1835e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this(Spec.UNDEFINED, Spec.UNDEFINED); 1836e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1837e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1838e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Copying constructors 1839e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1840e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1841e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@inheritDoc} 1842e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1843e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public LayoutParams(ViewGroup.LayoutParams params) { 1844e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet super(params); 1845e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1846e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1847e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1848e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@inheritDoc} 1849e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1850e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public LayoutParams(MarginLayoutParams params) { 1851e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet super(params); 1852e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1853e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1854e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1855e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@inheritDoc} 1856e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1857e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public LayoutParams(LayoutParams that) { 1858e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet super(that); 1859e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.rowSpec = that.rowSpec; 1860e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.columnSpec = that.columnSpec; 1861e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1862e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1863e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // AttributeSet constructors 1864e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1865e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1866e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@inheritDoc} 1867e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1868e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Values not defined in the attribute set take the default values 1869e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * defined in {@link LayoutParams}. 1870e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1871e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public LayoutParams(Context context, AttributeSet attrs) { 1872e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet super(context, attrs); 1873e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet reInitSuper(context, attrs); 1874e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet init(context, attrs); 1875e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1876e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1877e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Implementation 1878e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1879e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Reinitialise the margins using a different default policy than MarginLayoutParams. 1880e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // Here we use the value UNDEFINED (as distinct from zero) to represent the undefined state 1881e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // so that a layout manager default can be accessed post set up. We need this as, at the 1882e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // point of installation, we do not know how many rows/cols there are and therefore 1883e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // which elements are positioned next to the container's trailing edges. We need to 1884e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // know this as margins around the container's boundary should have different 1885e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // defaults to those between peers. 1886e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1887e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // This method could be parametrized and moved into MarginLayout. 1888e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void reInitSuper(Context context, AttributeSet attrs) { 1889e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet TypedArray a = 1890e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet context.obtainStyledAttributes(attrs, R.styleable.GridLayout_Layout); 1891e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet try { 1892e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int margin = a.getDimensionPixelSize(MARGIN, DEFAULT_MARGIN); 1893e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1894e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.leftMargin = a.getDimensionPixelSize(LEFT_MARGIN, margin); 1895e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.topMargin = a.getDimensionPixelSize(TOP_MARGIN, margin); 1896e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.rightMargin = a.getDimensionPixelSize(RIGHT_MARGIN, margin); 1897e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.bottomMargin = a.getDimensionPixelSize(BOTTOM_MARGIN, margin); 1898e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } finally { 1899e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet a.recycle(); 1900e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1901e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1902e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1903e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private void init(Context context, AttributeSet attrs) { 1904e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.GridLayout_Layout); 1905e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet try { 1906e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int gravity = a.getInt(GRAVITY, Gravity.NO_GRAVITY); 1907e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1908e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int column = a.getInt(COLUMN, DEFAULT_COLUMN); 1909e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int colSpan = a.getInt(COLUMN_SPAN, DEFAULT_SPAN_SIZE); 1910e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.columnSpec = spec(column, colSpan, getAlignment(gravity, true)); 1911e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1912e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int row = a.getInt(ROW, DEFAULT_ROW); 1913e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int rowSpan = a.getInt(ROW_SPAN, DEFAULT_SPAN_SIZE); 1914e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.rowSpec = spec(row, rowSpan, getAlignment(gravity, false)); 1915e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } finally { 1916e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet a.recycle(); 1917e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1918e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1919e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1920e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 1921e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Describes how the child views are positioned. Default is {@code LEFT | BASELINE}. 1922e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * See {@link Gravity}. 1923e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1924e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param gravity the new gravity value 1925e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 1926e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @attr ref android.R.styleable#GridLayout_Layout_layout_gravity 1927e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1928e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void setGravity(int gravity) { 1929e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet rowSpec = rowSpec.copyWriteAlignment(getAlignment(gravity, false)); 1930e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet columnSpec = columnSpec.copyWriteAlignment(getAlignment(gravity, true)); 1931e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1932e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1933e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 1934e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected void setBaseAttributes(TypedArray attributes, int widthAttr, int heightAttr) { 1935e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.width = attributes.getLayoutDimension(widthAttr, DEFAULT_WIDTH); 1936e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.height = attributes.getLayoutDimension(heightAttr, DEFAULT_HEIGHT); 1937e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1938e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1939e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final void setRowSpecSpan(Interval span) { 1940e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet rowSpec = rowSpec.copyWriteSpan(span); 1941e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1942e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1943e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final void setColumnSpecSpan(Interval span) { 1944e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet columnSpec = columnSpec.copyWriteSpan(span); 1945e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1946e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1947e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 1948e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean equals(Object o) { 1949e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (this == o) return true; 1950e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (o == null || getClass() != o.getClass()) return false; 1951e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1952e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet LayoutParams that = (LayoutParams) o; 1953e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1954e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!columnSpec.equals(that.columnSpec)) return false; 1955e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!rowSpec.equals(that.rowSpec)) return false; 1956e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1957e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return true; 1958e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1959e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1960e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 1961e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int hashCode() { 1962e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int result = rowSpec.hashCode(); 1963e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result = 31 * result + columnSpec.hashCode(); 1964e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 1965e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1966e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1967e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1968e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 1969e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet In place of a HashMap from span to Int, use an array of key/value pairs - stored in Arcs. 1970e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Add the mutables completesCycle flag to avoid creating another hash table for detecting cycles. 1971e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 1972e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final static class Arc { 1973e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public final Interval span; 1974e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public final MutableInt value; 1975e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean valid = true; 1976e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1977e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public Arc(Interval span, MutableInt value) { 1978e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.span = span; 1979e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.value = value; 1980e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1981e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1982e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 1983e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public String toString() { 1984e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return span + " " + (!valid ? "+>" : "->") + " " + value; 1985e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1986e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1987e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1988e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // A mutable Integer - used to avoid heap allocation during the layout operation 1989e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1990e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final static class MutableInt { 1991e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int value; 1992e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1993e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public MutableInt() { 1994e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet reset(); 1995e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 1996e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 1997e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public MutableInt(int value) { 1998e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.value = value; 1999e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2000e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2001e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void reset() { 2002e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet value = Integer.MIN_VALUE; 2003e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2004e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2005e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2006e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public String toString() { 2007e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return Integer.toString(value); 2008e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2009e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2010e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2011e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final static class Assoc<K, V> extends ArrayList<Pair<K, V>> { 2012e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private final Class<K> keyType; 2013e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private final Class<V> valueType; 2014e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2015e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private Assoc(Class<K> keyType, Class<V> valueType) { 2016e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.keyType = keyType; 2017e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.valueType = valueType; 2018e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2019e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2020e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static <K, V> Assoc<K, V> of(Class<K> keyType, Class<V> valueType) { 2021e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new Assoc<K, V>(keyType, valueType); 2022e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2023e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2024e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public void put(K key, V value) { 2025e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet add(Pair.create(key, value)); 2026e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2027e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2028e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @SuppressWarnings(value = "unchecked") 2029e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public PackedMap<K, V> pack() { 2030e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int N = size(); 2031e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet K[] keys = (K[]) Array.newInstance(keyType, N); 2032e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet V[] values = (V[]) Array.newInstance(valueType, N); 2033e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < N; i++) { 2034e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet keys[i] = get(i).first; 2035e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet values[i] = get(i).second; 2036e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2037e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new PackedMap<K, V>(keys, values); 2038e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2039e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2040e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2041e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 2042e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet This data structure is used in place of a Map where we have an index that refers to the order 2043e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet in which each key/value pairs were added to the map. In this case we store keys and values 2044e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet in arrays of a length that is equal to the number of unique keys. We also maintain an 2045e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet array of indexes from insertion order to the compacted arrays of keys and values. 2046e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2047e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Note that behavior differs from that of a LinkedHashMap in that repeated entries 2048e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet *do* get added multiples times. So the length of index is equals to the number of 2049e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet items added. 2050e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2051e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet This is useful in the GridLayout class where we can rely on the order of children not 2052e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet changing during layout - to use integer-based lookup for our internal structures 2053e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet rather than using (and storing) an implementation of Map<Key, ?>. 2054e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2055e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @SuppressWarnings(value = "unchecked") 2056e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final static class PackedMap<K, V> { 2057e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public final int[] index; 2058e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public final K[] keys; 2059e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public final V[] values; 2060e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2061e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private PackedMap(K[] keys, V[] values) { 2062e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.index = createIndex(keys); 2063e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2064e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.keys = compact(keys, index); 2065e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.values = compact(values, index); 2066e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2067e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2068e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public V getValue(int i) { 2069e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return values[index[i]]; 2070e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2071e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2072e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static <K> int[] createIndex(K[] keys) { 2073e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int size = keys.length; 2074e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int[] result = new int[size]; 2075e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2076e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Map<K, Integer> keyToIndex = new HashMap<K, Integer>(); 2077e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < size; i++) { 2078e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet K key = keys[i]; 2079e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Integer index = keyToIndex.get(key); 2080e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (index == null) { 2081e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet index = keyToIndex.size(); 2082e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet keyToIndex.put(key, index); 2083e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2084e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result[i] = index; 2085e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2086e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 2087e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2088e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2089e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 2090e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Create a compact array of keys or values using the supplied index. 2091e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2092e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static <K> K[] compact(K[] a, int[] index) { 2093e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int size = a.length; 2094e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Class<?> componentType = a.getClass().getComponentType(); 2095e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet K[] result = (K[]) Array.newInstance(componentType, max2(index, -1) + 1); 2096e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2097e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // this overwrite duplicates, retaining the last equivalent entry 2098e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet for (int i = 0; i < size; i++) { 2099e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result[index[i]] = a[i]; 2100e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2101e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 2102e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2103e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2104e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2105e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 2106e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet For each group (with a given alignment) we need to store the amount of space required 2107e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet before the alignment point and the amount of space required after it. One side of this 2108e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet calculation is always 0 for START and END alignments but we don't make use of this. 2109e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet For CENTER and BASELINE alignments both sides are needed and in the BASELINE case no 2110e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet simple optimisations are possible. 2111e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2112e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet The general algorithm therefore is to create a Map (actually a PackedMap) from 2113e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet group to Bounds and to loop through all Views in the group taking the maximum 2114e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet of the values for each View. 2115e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2116e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static class Bounds { 2117e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int before; 2118e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int after; 2119e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int flexibility; // we're flexible iff all included specs are flexible 2120e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2121e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private Bounds() { 2122e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet reset(); 2123e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2124e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2125e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected void reset() { 2126e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet before = Integer.MIN_VALUE; 2127e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet after = Integer.MIN_VALUE; 2128e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet flexibility = CAN_STRETCH; // from the above, we're flexible when empty 2129e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2130e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2131e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected void include(int before, int after) { 2132e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.before = max(this.before, before); 2133e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.after = max(this.after, after); 2134e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2135e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2136e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected int size(boolean min) { 2137e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!min) { 2138e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (canStretch(flexibility)) { 2139e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return MAX_SIZE; 2140e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2141e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2142e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return before + after; 2143e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2144e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 21452c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio protected int getOffset(GridLayout gl, View c, Alignment a, int size, boolean horizontal) { 2146b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return before - a.getAlignmentValue(c, size, ViewGroupCompat.getLayoutMode(gl)); 2147e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2148e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 21492c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio protected final void include(GridLayout gl, View c, Spec spec, Axis axis) { 2150e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.flexibility &= spec.getFlexibility(); 21512c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio boolean horizontal = axis.horizontal; 21522c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio int size = gl.getMeasurementIncludingMargin(c, horizontal); 21532c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio Alignment alignment = gl.getAlignment(spec.alignment, horizontal); 2154e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet // todo test this works correctly when the returned value is UNDEFINED 2155b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell int before = alignment.getAlignmentValue(c, size, ViewGroupCompat.getLayoutMode(gl)); 2156e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet include(before, size - before); 2157e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2158e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2159e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2160e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public String toString() { 2161e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return "Bounds{" + 2162e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet "before=" + before + 2163e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet ", after=" + after + 2164e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet '}'; 2165e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2166e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2167e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2168e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2169e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * An Interval represents a contiguous range of values that lie between 2170e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * the interval's {@link #min} and {@link #max} values. 2171e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 2172e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Intervals are immutable so may be passed as values and used as keys in hash tables. 2173e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * It is not necessary to have multiple instances of Intervals which have the same 2174e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link #min} and {@link #max} values. 2175e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 2176e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Intervals are often written as {@code [min, max]} and represent the set of values 2177e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code x} such that {@code min <= x < max}. 2178e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2179e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final static class Interval { 2180e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2181e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The minimum value. 2182e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2183e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public final int min; 2184e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2185e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2186e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The maximum value. 2187e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2188e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public final int max; 2189e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2190e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2191e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Construct a new Interval, {@code interval}, where: 2192e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <ul> 2193e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li> {@code interval.min = min} </li> 2194e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li> {@code interval.max = max} </li> 2195e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * </ul> 2196e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2197e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param min the minimum value. 2198e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param max the maximum value. 2199e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2200e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public Interval(int min, int max) { 2201e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.min = min; 2202e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.max = max; 2203e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2204e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2205e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int size() { 2206e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return max - min; 2207e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2208e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2209e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval inverse() { 2210e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new Interval(max, min); 2211e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2212e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2213e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2214e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns {@code true} if the {@link #getClass class}, 2215e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link #min} and {@link #max} properties of this Interval and the 2216e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * supplied parameter are pairwise equal; {@code false} otherwise. 2217e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2218e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param that the object to compare this interval with 2219e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2220e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return {@code true} if the specified object is equal to this 2221e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code Interval}, {@code false} otherwise. 2222e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2223e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2224e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean equals(Object that) { 2225e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (this == that) { 2226e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return true; 2227e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2228e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (that == null || getClass() != that.getClass()) { 2229e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 2230e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2231e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2232e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Interval interval = (Interval) that; 2233e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2234e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (max != interval.max) { 2235e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 2236e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2237e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet //noinspection RedundantIfStatement 2238e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (min != interval.min) { 2239e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 2240e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2241e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2242e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return true; 2243e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2244e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2245e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2246e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int hashCode() { 2247e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int result = min; 2248e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result = 31 * result + max; 2249e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 2250e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2251e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2252e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2253e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public String toString() { 2254e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return "[" + min + ", " + max + "]"; 2255e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2256e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2257e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2258e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2259e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * A Spec defines the horizontal or vertical characteristics of a group of 2260e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * cells. Each spec. defines the <em>grid indices</em> and <em>alignment</em> 2261e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * along the appropriate axis. 2262e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 2263e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The <em>grid indices</em> are the leading and trailing edges of this cell group. 2264e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * See {@link GridLayout} for a description of the conventions used by GridLayout 2265e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * for grid indices. 2266e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 2267e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The <em>alignment</em> property specifies how cells should be aligned in this group. 2268e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * For row groups, this specifies the vertical alignment. 2269e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * For column groups, this specifies the horizontal alignment. 2270e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 2271e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Use the following static methods to create specs: 2272e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <ul> 2273e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #spec(int)}</li> 2274e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #spec(int, int)}</li> 2275e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #spec(int, Alignment)}</li> 2276e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li>{@link #spec(int, int, Alignment)}</li> 2277e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * </ul> 2278e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2279e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2280e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static class Spec { 2281e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static final Spec UNDEFINED = spec(GridLayout.UNDEFINED); 2282e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2283e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final boolean startDefined; 2284e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final Interval span; 2285e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final Alignment alignment; 2286e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2287e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private Spec(boolean startDefined, Interval span, Alignment alignment) { 2288e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.startDefined = startDefined; 2289e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.span = span; 2290e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this.alignment = alignment; 2291e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2292e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2293e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private Spec(boolean startDefined, int start, int size, Alignment alignment) { 2294e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet this(startDefined, new Interval(start, start + size), alignment); 2295e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2296e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2297e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final Spec copyWriteSpan(Interval span) { 2298e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new Spec(startDefined, span, alignment); 2299e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2300e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2301e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final Spec copyWriteAlignment(Alignment alignment) { 2302e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new Spec(startDefined, span, alignment); 2303e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2304e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2305e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet final int getFlexibility() { 2306e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return (alignment == UNDEFINED_ALIGNMENT) ? INFLEXIBLE : CAN_STRETCH; 2307e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2308e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2309e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2310e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns {@code true} if the {@code class}, {@code alignment} and {@code span} 2311e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * properties of this Spec and the supplied parameter are pairwise equal, 2312e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code false} otherwise. 2313e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2314e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param that the object to compare this spec with 2315e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2316e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return {@code true} if the specified object is equal to this 2317e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code Spec}; {@code false} otherwise 2318e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2319e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2320e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public boolean equals(Object that) { 2321e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (this == that) { 2322e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return true; 2323e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2324e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (that == null || getClass() != that.getClass()) { 2325e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 2326e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2327e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2328e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Spec spec = (Spec) that; 2329e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2330e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!alignment.equals(spec.alignment)) { 2331e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 2332e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2333e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet //noinspection RedundantIfStatement 2334e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet if (!span.equals(spec.span)) { 2335e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return false; 2336e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2337e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2338e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return true; 2339e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2340e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2341e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2342e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int hashCode() { 2343e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int result = span.hashCode(); 2344e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet result = 31 * result + alignment.hashCode(); 2345e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return result; 2346e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2347e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2348e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2349e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2350e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Return a Spec, {@code spec}, where: 2351e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <ul> 2352e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li> {@code spec.span = [start, start + size]} </li> 2353e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li> {@code spec.alignment = alignment} </li> 2354e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * </ul> 23552c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <p> 23562c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * To leave the start index undefined, use the value {@link #UNDEFINED}. 2357e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2358e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param start the start 2359e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param size the size 2360e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param alignment the alignment 2361e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2362e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static Spec spec(int start, int size, Alignment alignment) { 2363e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new Spec(start != UNDEFINED, start, size, alignment); 2364e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2365e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2366e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2367e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Return a Spec, {@code spec}, where: 2368e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <ul> 2369e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li> {@code spec.span = [start, start + 1]} </li> 2370e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li> {@code spec.alignment = alignment} </li> 2371e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * </ul> 23722c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <p> 23732c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * To leave the start index undefined, use the value {@link #UNDEFINED}. 2374e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2375e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param start the start index 2376e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param alignment the alignment 23772c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 23782c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * @see #spec(int, int, Alignment) 2379e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2380e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static Spec spec(int start, Alignment alignment) { 2381e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return spec(start, 1, alignment); 2382e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2383e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2384e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2385e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Return a Spec, {@code spec}, where: 2386e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <ul> 2387e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li> {@code spec.span = [start, start + size]} </li> 2388e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * </ul> 23892c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <p> 23902c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * To leave the start index undefined, use the value {@link #UNDEFINED}. 2391e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2392e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param start the start 2393e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param size the size 23942c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 23952c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * @see #spec(int, Alignment) 2396e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2397e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static Spec spec(int start, int size) { 2398e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return spec(start, size, UNDEFINED_ALIGNMENT); 2399e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2400e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2401e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2402e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Return a Spec, {@code spec}, where: 2403e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <ul> 2404e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <li> {@code spec.span = [start, start + 1]} </li> 2405e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * </ul> 24062c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * <p> 24072c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * To leave the start index undefined, use the value {@link #UNDEFINED}. 2408e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2409e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param start the start index 24102c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * 24112c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * @see #spec(int, int) 2412e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2413e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static Spec spec(int start) { 2414e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return spec(start, 1); 2415e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2416e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2417e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2418e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Alignments specify where a view should be placed within a cell group and 2419e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * what size it should be. 2420e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 2421e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The {@link LayoutParams} class contains a {@link LayoutParams#rowSpec rowSpec} 2422e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * and a {@link LayoutParams#columnSpec columnSpec} each of which contains an 2423e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@code alignment}. Overall placement of the view in the cell 2424e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * group is specified by the two alignments which act along each axis independently. 2425e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 2426e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The GridLayout class defines the most common alignments used in general layout: 2427e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link #TOP}, {@link #LEFT}, {@link #BOTTOM}, {@link #RIGHT}, {@link #START}, 2428e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link #END}, {@link #CENTER}, {@link #BASELINE} and {@link #FILL}. 2429e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2430e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 2431e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * An Alignment implementation must define {@link #getAlignmentValue(View, int, int)}, 2432e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * to return the appropriate value for the type of alignment being defined. 2433e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The enclosing algorithms position the children 2434e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * so that the locations defined by the alignment values 2435e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * are the same for all of the views in a group. 2436e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 2437e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2438e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static abstract class Alignment { 2439e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Alignment() { 2440e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2441e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2442e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet abstract int getGravityOffset(View view, int cellDelta); 2443e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2444e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2445e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns an alignment value. In the case of vertical alignments the value 2446e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * returned should indicate the distance from the top of the view to the 2447e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * alignment location. 2448e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * For horizontal alignments measurement is made from the left edge of the component. 2449e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2450e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param view the view to which this alignment should be applied 2451e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param viewSize the measured size of the view 24522c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio * @param mode the basis of alignment: CLIP or OPTICAL 2453e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return the alignment value 2454e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 24552c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio abstract int getAlignmentValue(View view, int viewSize, int mode); 2456e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2457e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2458e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Returns the size of the view specified by this alignment. 2459e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * In the case of vertical alignments this method should return a height; for 2460e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * horizontal alignments this method should return the width. 2461e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * <p> 2462e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * The default implementation returns {@code viewSize}. 2463e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2464e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param view the view to which this alignment should be applied 2465e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param viewSize the measured size of the view 2466e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @param cellSize the size of the cell into which this view will be placed 2467e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @return the aligned size 2468e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2469e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int getSizeInCell(View view, int viewSize, int cellSize) { 2470e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return viewSize; 2471e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2472e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2473e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet Bounds getBounds() { 2474e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new Bounds(); 2475e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2476e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2477e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2478e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static final Alignment UNDEFINED_ALIGNMENT = new Alignment() { 2479e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2480e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int getGravityOffset(View view, int cellDelta) { 2481e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return UNDEFINED; 2482e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2483e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2484e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 24852c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public int getAlignmentValue(View view, int viewSize, int mode) { 2486e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return UNDEFINED; 2487e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2488e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet }; 2489e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2490e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2491e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be aligned with the <em>start</em> 2492e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * edges of the other views in its cell group. 2493e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2494e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final Alignment LEADING = new Alignment() { 2495e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2496e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int getGravityOffset(View view, int cellDelta) { 2497e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return 0; 2498e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2499e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2500e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 25012c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public int getAlignmentValue(View view, int viewSize, int mode) { 2502e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return 0; 2503e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2504e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet }; 2505e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2506e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2507e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be aligned with the <em>end</em> 2508e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * edges of the other views in its cell group. 2509e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2510e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final Alignment TRAILING = new Alignment() { 2511e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2512e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int getGravityOffset(View view, int cellDelta) { 2513e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return cellDelta; 2514e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2515e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2516e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 25172c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public int getAlignmentValue(View view, int viewSize, int mode) { 2518e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return viewSize; 2519e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2520e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet }; 2521e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2522e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2523e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be aligned with the <em>top</em> 2524e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * edges of the other views in its cell group. 2525e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2526e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final Alignment TOP = LEADING; 2527e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2528e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2529e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be aligned with the <em>bottom</em> 2530e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * edges of the other views in its cell group. 2531e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2532e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final Alignment BOTTOM = TRAILING; 2533e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2534e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2535e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be aligned with the <em>start</em> 2536e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * edges of the other views in its cell group. 2537e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2538e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final Alignment START = LEADING; 2539e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2540e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2541e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be aligned with the <em>end</em> 2542e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * edges of the other views in its cell group. 2543e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2544e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final Alignment END = TRAILING; 2545e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2546e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static Alignment createSwitchingAlignment(final Alignment ltr, final Alignment rtl) { 2547e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new Alignment() { 2548e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2549e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int getGravityOffset(View view, int cellDelta) { 2550b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell boolean isLayoutRtl = ViewCompat.getLayoutDirection(view) == 2551b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell ViewCompat.LAYOUT_DIRECTION_RTL; 2552b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return (!isLayoutRtl ? ltr : rtl).getGravityOffset(view, cellDelta); 2553e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2554e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2555e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 25562c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public int getAlignmentValue(View view, int viewSize, int mode) { 2557b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell boolean isLayoutRtl = ViewCompat.getLayoutDirection(view) == 2558b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell ViewCompat.LAYOUT_DIRECTION_RTL; 2559b12ba0547b2fad1c4dfc12dec36c5e7893974e67Adam Powell return (!isLayoutRtl ? ltr : rtl).getAlignmentValue(view, viewSize, mode); 2560e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2561e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet }; 2562e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2563e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2564e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2565e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be aligned with the <em>left</em> 2566e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * edges of the other views in its cell group. 2567e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2568e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final Alignment LEFT = createSwitchingAlignment(START, END); 2569e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2570e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2571e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be aligned with the <em>right</em> 2572e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * edges of the other views in its cell group. 2573e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2574e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final Alignment RIGHT = createSwitchingAlignment(END, START); 2575e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2576e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2577e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be <em>centered</em> with the other views in its cell group. 2578e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * This constant may be used in both {@link LayoutParams#rowSpec rowSpecs} and {@link 2579e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * LayoutParams#columnSpec columnSpecs}. 2580e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2581e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final Alignment CENTER = new Alignment() { 2582e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2583e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int getGravityOffset(View view, int cellDelta) { 2584e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return cellDelta >> 1; 2585e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2586e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2587e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 25882c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public int getAlignmentValue(View view, int viewSize, int mode) { 2589e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return viewSize >> 1; 2590e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2591e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet }; 2592e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2593e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2594e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should be aligned with the <em>baselines</em> 2595e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * of the other views in its cell group. 2596e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * This constant may only be used as an alignment in {@link LayoutParams#rowSpec rowSpecs}. 2597e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * 2598e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * @see View#getBaseline() 2599e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2600e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final Alignment BASELINE = new Alignment() { 2601e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2602e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int getGravityOffset(View view, int cellDelta) { 2603e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return 0; // baseline gravity is top 2604e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2605e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2606e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 26072c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public int getAlignmentValue(View view, int viewSize, int mode) { 26082c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio if (view.getVisibility() == GONE) { 26092c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return 0; 26102c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio } 2611e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int baseline = view.getBaseline(); 26122c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return baseline == -1 ? UNDEFINED : baseline; 2613e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2614e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2615e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2616e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public Bounds getBounds() { 2617e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return new Bounds() { 2618e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /* 2619e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet In a baseline aligned row in which some components define a baseline 2620e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet and some don't, we need a third variable to properly account for all 2621e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet the sizes. This tracks the maximum size of all the components - 2622e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet including those that don't define a baseline. 2623e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2624e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private int size; 2625e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2626e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2627e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected void reset() { 2628e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet super.reset(); 2629e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet size = Integer.MIN_VALUE; 2630e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2631e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2632e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2633e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected void include(int before, int after) { 2634e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet super.include(before, after); 2635e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet size = max(size, before + after); 2636e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2637e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2638e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2639e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet protected int size(boolean min) { 2640e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return max(super.size(min), size); 2641e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2642e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2643e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 26442c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio protected int getOffset(GridLayout gl, View c, Alignment a, int size, boolean hrz) { 26452c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio return max(0, super.getOffset(gl, c, a, size, hrz)); 2646e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2647e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet }; 2648e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2649e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet }; 2650e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2651e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet /** 2652e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * Indicates that a view should expanded to fit the boundaries of its cell group. 2653e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * This constant may be used in both {@link LayoutParams#rowSpec rowSpecs} and 2654e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet * {@link LayoutParams#columnSpec columnSpecs}. 2655e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet */ 2656e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public static final Alignment FILL = new Alignment() { 2657e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2658e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet int getGravityOffset(View view, int cellDelta) { 2659e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return 0; 2660e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2661e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2662e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 26632c78c295c13866c37e778375d1b37d6ff6016190Fabrice Di Meglio public int getAlignmentValue(View view, int viewSize, int mode) { 2664e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return UNDEFINED; 2665e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2666e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2667e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet @Override 2668e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet public int getSizeInCell(View view, int viewSize, int cellSize) { 2669e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return cellSize; 2670e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2671e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet }; 2672e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2673e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet static boolean canStretch(int flexibility) { 2674e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet return (flexibility & CAN_STRETCH) != 0; 2675e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet } 2676e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet 2677e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int INFLEXIBLE = 0; 2678e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet private static final int CAN_STRETCH = 2; 2679e1feb53bd8abfa46613fdd0abcf7a015c7e706c1Xavier Ducrohet} 2680