1ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav/* 2ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * Copyright (C) 2015 The Android Open Source Project 3ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * 4ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * Licensed under the Apache License, Version 2.0 (the "License"); 5ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * you may not use this file except in compliance with the License. 6ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * You may obtain a copy of the License at 7ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * 8ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * http://www.apache.org/licenses/LICENSE-2.0 9ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * 10ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * Unless required by applicable law or agreed to in writing, software 11ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * distributed under the License is distributed on an "AS IS" BASIS, 12ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * See the License for the specific language governing permissions and 14ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * limitations under the License. 15ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav */ 16ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 17ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslavpackage com.android.packageinstaller.permission.ui; 18ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 19ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslavimport android.content.Context; 20ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslavimport android.util.AttributeSet; 21ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslavimport android.view.Gravity; 22ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslavimport android.view.View; 23ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslavimport android.widget.LinearLayout; 24ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslavimport com.android.packageinstaller.R; 25ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 26ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav/** 27ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * An extension of LinearLayout that automatically switches to vertical 28ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav * orientation when it can't fit its child views horizontally. 29ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav */ 30ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslavpublic class ButtonBarLayout extends LinearLayout { 31ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav /** Whether the current configuration allows stacking. */ 32ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav private boolean mAllowStacking; 33ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 34ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav private int mLastWidthSize = -1; 35ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 36ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav public ButtonBarLayout(Context context, AttributeSet attrs) { 37ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav super(context, attrs); 38ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav mAllowStacking = true; 39ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 40ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 41ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav public void setAllowStacking(boolean allowStacking) { 42ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav if (mAllowStacking != allowStacking) { 43ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav mAllowStacking = allowStacking; 44ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav if (!mAllowStacking && getOrientation() == LinearLayout.VERTICAL) { 45ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav setStacked(false); 46ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 47ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav requestLayout(); 48ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 49ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 50ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 51ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav @Override 52ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 53ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 54ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 55ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav if (mAllowStacking) { 56ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav if (widthSize > mLastWidthSize && isStacked()) { 57ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav // We're being measured wider this time, try un-stacking. 58ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav setStacked(false); 59ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 60ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 61ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav mLastWidthSize = widthSize; 62ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 63ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 64ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav boolean needsRemeasure = false; 65ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 66ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav // If we're not stacked, make sure the measure spec is AT_MOST rather 67ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav // than EXACTLY. This ensures that we'll still get TOO_SMALL so that we 68ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav // know to stack the buttons. 69ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav final int initialWidthMeasureSpec; 70ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav if (!isStacked() && MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY) { 71ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav initialWidthMeasureSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.AT_MOST); 72ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 73ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav // We'll need to remeasure again to fill excess space. 74ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav needsRemeasure = true; 75ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } else { 76ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav initialWidthMeasureSpec = widthMeasureSpec; 77ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 78ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 79ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav super.onMeasure(initialWidthMeasureSpec, heightMeasureSpec); 80ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 81ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav if (mAllowStacking && !isStacked()) { 82ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav final int measuredWidth = getMeasuredWidthAndState(); 83ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav final int measuredWidthState = measuredWidth & MEASURED_STATE_MASK; 84ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav if (measuredWidthState == MEASURED_STATE_TOO_SMALL) { 85ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav setStacked(true); 86ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 87ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav // Measure again in the new orientation. 88ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav needsRemeasure = true; 89ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 90ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 91ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 92ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav if (needsRemeasure) { 93ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav super.onMeasure(widthMeasureSpec, heightMeasureSpec); 94ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 95ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 96ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 97ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav private void setStacked(boolean stacked) { 98ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav setOrientation(stacked ? LinearLayout.VERTICAL : LinearLayout.HORIZONTAL); 995e3cc5335e208fff39b0983a88f37e92b3da8c69Svet Ganov setGravity(stacked ? Gravity.END : Gravity.BOTTOM); 100ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 101ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav final View spacer = findViewById(R.id.spacer); 102ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav if (spacer != null) { 103ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav spacer.setVisibility(stacked ? View.GONE : View.INVISIBLE); 104ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 105ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 106ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav // Reverse the child order. This is specific to the Material button 107ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav // bar's layout XML and will probably not generalize. 108ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav final int childCount = getChildCount(); 109ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav for (int i = childCount - 2; i >= 0; i--) { 110ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav bringChildToFront(getChildAt(i)); 111ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 112ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 113ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav 114ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav private boolean isStacked() { 115ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav return getOrientation() == LinearLayout.VERTICAL; 116ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav } 117ef861375eebd9ac6cce7c0bb163380ab1c951063Svetoslav} 118