StackView.java revision a32edd4b4c894f4fb3d9fd7e9d5b80321df79e20
144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen/* 244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * Copyright (C) 2010 The Android Open Source Project 344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * 444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * Licensed under the Apache License, Version 2.0 (the "License"); 544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * you may not use this file except in compliance with the License. 644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * You may obtain a copy of the License at 744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * 844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * http://www.apache.org/licenses/LICENSE-2.0 944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * 1044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * Unless required by applicable law or agreed to in writing, software 1144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * distributed under the License is distributed on an "AS IS" BASIS, 1244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * See the License for the specific language governing permissions and 1444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * limitations under the License. 1544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen */ 1644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 1744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenpackage android.widget; 1844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 19a18a86b43e40e3c15dcca0ae0148d641be9b25feChet Haaseimport android.animation.ObjectAnimator; 20e5ebcb0107a939395e03592fd44c746cd09e311dRomain Guyimport android.animation.PropertyValuesHolder; 2144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.content.Context; 2232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohenimport android.graphics.Bitmap; 23839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohenimport android.graphics.BlurMaskFilter; 2432a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohenimport android.graphics.Canvas; 2532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohenimport android.graphics.Matrix; 2632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohenimport android.graphics.Paint; 2732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohenimport android.graphics.PorterDuff; 2832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohenimport android.graphics.PorterDuffXfermode; 2944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.graphics.Rect; 309b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohenimport android.graphics.RectF; 31d51bbb5b56446519db88f49f2682da782b0069acAdam Cohenimport android.graphics.Region; 32839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohenimport android.graphics.TableMaskFilter; 3344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.util.AttributeSet; 3444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.util.Log; 3544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.view.MotionEvent; 3644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.view.VelocityTracker; 3744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.view.View; 3844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.view.ViewConfiguration; 3944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.view.ViewGroup; 40b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohenimport android.view.animation.LinearInterpolator; 4144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenimport android.widget.RemoteViews.RemoteView; 4244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 4344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen@RemoteView 4444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen/** 4544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * A view that displays its children in a stack and allows users to discretely swipe 4644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * through the children. 4744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen */ 4844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohenpublic class StackView extends AdapterViewAnimator { 4944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private final String TAG = "StackView"; 5044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 5144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen /** 5244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * Default animation parameters 5344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen */ 54e5ebcb0107a939395e03592fd44c746cd09e311dRomain Guy private static final int DEFAULT_ANIMATION_DURATION = 400; 55e5ebcb0107a939395e03592fd44c746cd09e311dRomain Guy private static final int MINIMUM_ANIMATION_DURATION = 50; 5644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 5744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen /** 58839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen * Parameters effecting the perspective visuals 59839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen */ 60839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen private static float PERSPECTIVE_SHIFT_FACTOR = 0.12f; 61e5ebcb0107a939395e03592fd44c746cd09e311dRomain Guy @SuppressWarnings({"FieldCanBeLocal"}) 62839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen private static float PERSPECTIVE_SCALE_FACTOR = 0.35f; 63839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 64839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen /** 65839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen * Represent the two possible stack modes, one where items slide up, and the other 66839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen * where items slide down. The perspective is also inverted between these two modes. 67839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen */ 68839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen private static final int ITEMS_SLIDE_UP = 0; 69839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen private static final int ITEMS_SLIDE_DOWN = 1; 70839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 71839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen /** 7244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * These specify the different gesture states 7344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen */ 745b53f9186e7812c93bc578d18e92cb123481fcbcRomain Guy private static final int GESTURE_NONE = 0; 755b53f9186e7812c93bc578d18e92cb123481fcbcRomain Guy private static final int GESTURE_SLIDE_UP = 1; 765b53f9186e7812c93bc578d18e92cb123481fcbcRomain Guy private static final int GESTURE_SLIDE_DOWN = 2; 7744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 7844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen /** 7944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * Specifies how far you need to swipe (up or down) before it 8044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * will be consider a completed gesture when you lift your finger 8144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen */ 82a9238c89a43500ed0bcdeaee182be08ff991c627Adam Cohen private static final float SWIPE_THRESHOLD_RATIO = 0.2f; 83a9238c89a43500ed0bcdeaee182be08ff991c627Adam Cohen 84a9238c89a43500ed0bcdeaee182be08ff991c627Adam Cohen /** 85a9238c89a43500ed0bcdeaee182be08ff991c627Adam Cohen * Specifies the total distance, relative to the size of the stack, 86a9238c89a43500ed0bcdeaee182be08ff991c627Adam Cohen * that views will be slid, either up or down 87a9238c89a43500ed0bcdeaee182be08ff991c627Adam Cohen */ 885b53f9186e7812c93bc578d18e92cb123481fcbcRomain Guy private static final float SLIDE_UP_RATIO = 0.7f; 8944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 9044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen /** 9144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * Sentinel value for no current active pointer. 9244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * Used by {@link #mActivePointerId}. 9344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen */ 9444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private static final int INVALID_POINTER = -1; 9544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 9644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen /** 97839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen * Number of active views in the stack. One fewer view is actually visible, as one is hidden. 98839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen */ 99839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen private static final int NUM_ACTIVE_VIEWS = 5; 100839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 101dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen private static final int FRAME_PADDING = 4; 102839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 103839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen /** 10444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * These variables are all related to the current state of touch interaction 10544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * with the stack 10644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen */ 10744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private float mInitialY; 10844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private float mInitialX; 10944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private int mActivePointerId; 11044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private int mYVelocity = 0; 11144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private int mSwipeGestureType = GESTURE_NONE; 112dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen private int mSlideAmount; 11344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private int mSwipeThreshold; 11444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private int mTouchSlop; 11544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private int mMaximumVelocity; 11644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private VelocityTracker mVelocityTracker; 1173352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen private boolean mTransitionIsSetup = false; 11844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 1199b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen private static HolographicHelper sHolographicHelper; 12032a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen private ImageView mHighlight; 12132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen private StackSlider mStackSlider; 12244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private boolean mFirstLayoutHappened = false; 123839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen private int mStackMode; 124dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen private int mFramePadding; 125d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen private final Rect invalidateRect = new Rect(); 12644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 12744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen public StackView(Context context) { 12844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen super(context); 12944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen initStackView(); 13044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 13144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 13244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen public StackView(Context context, AttributeSet attrs) { 13344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen super(context, attrs); 13444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen initStackView(); 13544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 13644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 13744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private void initStackView() { 13896d8d56302da81b24333b204e6d7f15064538036Adam Cohen configureViewAnimator(NUM_ACTIVE_VIEWS, 1); 13944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen setStaticTransformationsEnabled(true); 14044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen final ViewConfiguration configuration = ViewConfiguration.get(getContext()); 141b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen mTouchSlop = configuration.getScaledTouchSlop(); 14244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 14344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mActivePointerId = INVALID_POINTER; 14432a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 14532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mHighlight = new ImageView(getContext()); 14632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mHighlight.setLayoutParams(new LayoutParams(mHighlight)); 14732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen addViewInLayout(mHighlight, -1, new LayoutParams(mHighlight)); 14832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mStackSlider = new StackSlider(); 14932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 1509b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen if (sHolographicHelper == null) { 151dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen sHolographicHelper = new HolographicHelper(mContext); 15232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 1539b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen setClipChildren(false); 1549b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen setClipToPadding(false); 1551480fddea874a42adb43b4bcdac6704e4c3e110bAdam Cohen 156839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen // This sets the form of the StackView, which is currently to have the perspective-shifted 157839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen // views above the active view, and have items slide down when sliding out. The opposite is 158839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen // available by using ITEMS_SLIDE_UP. 159839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen mStackMode = ITEMS_SLIDE_DOWN; 160839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 1611480fddea874a42adb43b4bcdac6704e4c3e110bAdam Cohen // This is a flag to indicate the the stack is loading for the first time 1621480fddea874a42adb43b4bcdac6704e4c3e110bAdam Cohen mWhichChild = -1; 163dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen 164dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen // Adjust the frame padding based on the density, since the highlight changes based 165dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen // on the density 166dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen final float density = mContext.getResources().getDisplayMetrics().density; 167dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen mFramePadding = (int) Math.ceil(density * FRAME_PADDING); 16844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 16944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 17044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen /** 17144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * Animate the views between different relative indexes within the {@link AdapterViewAnimator} 17244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen */ 17344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen void animateViewForTransition(int fromIndex, int toIndex, View view) { 17496d8d56302da81b24333b204e6d7f15064538036Adam Cohen if (fromIndex == -1 && toIndex != 0) { 17544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Fade item in 17644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (view.getAlpha() == 1) { 17744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen view.setAlpha(0); 17844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 179b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen view.setVisibility(VISIBLE); 180b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen 1812794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase ObjectAnimator fadeIn = ObjectAnimator.ofFloat(view, "alpha", view.getAlpha(), 1.0f); 1822794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase fadeIn.setDuration(DEFAULT_ANIMATION_DURATION); 18344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen fadeIn.start(); 18496d8d56302da81b24333b204e6d7f15064538036Adam Cohen } else if (fromIndex == 0 && toIndex == 1) { 18544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Slide item in 18644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen view.setVisibility(VISIBLE); 18732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 188839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen int duration = Math.round(mStackSlider.getDurationForNeutralPosition(mYVelocity)); 18944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 190b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen StackSlider animationSlider = new StackSlider(mStackSlider); 1912794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder slideInY = PropertyValuesHolder.ofFloat("YProgress", 0.0f); 1922794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder slideInX = PropertyValuesHolder.ofFloat("XProgress", 0.0f); 1932794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase ObjectAnimator pa = ObjectAnimator.ofPropertyValuesHolder(animationSlider, 194839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen slideInX, slideInY); 1952794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase pa.setDuration(duration); 196839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen pa.setInterpolator(new LinearInterpolator()); 197839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen pa.start(); 19896d8d56302da81b24333b204e6d7f15064538036Adam Cohen } else if (fromIndex == 1 && toIndex == 0) { 19944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Slide item out 200839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen int duration = Math.round(mStackSlider.getDurationForOffscreenPosition(mYVelocity)); 20144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 202b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen StackSlider animationSlider = new StackSlider(mStackSlider); 2032794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder slideOutY = PropertyValuesHolder.ofFloat("YProgress", 1.0f); 2042794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder slideOutX = PropertyValuesHolder.ofFloat("XProgress", 0.0f); 2052794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase ObjectAnimator pa = ObjectAnimator.ofPropertyValuesHolder(animationSlider, 2062794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase slideOutX, slideOutY); 2072794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase pa.setDuration(duration); 208839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen pa.setInterpolator(new LinearInterpolator()); 209839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen pa.start(); 21096d8d56302da81b24333b204e6d7f15064538036Adam Cohen } else if (fromIndex == -1 && toIndex == 0) { 21144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Make sure this view that is "waiting in the wings" is invisible 21244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen view.setAlpha(0.0f); 213b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen view.setVisibility(INVISIBLE); 214b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen LayoutParams lp = (LayoutParams) view.getLayoutParams(); 215dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen lp.setVerticalOffset(-mSlideAmount); 21644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } else if (toIndex == -1) { 21744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Fade item out 2182794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase ObjectAnimator fadeOut = ObjectAnimator.ofFloat(view, "alpha", view.getAlpha(), 0.0f); 2192794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase fadeOut.setDuration(DEFAULT_ANIMATION_DURATION); 22044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen fadeOut.start(); 22144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 222839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 223839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen // Implement the faked perspective 224839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (toIndex != -1) { 225f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen transformViewAtIndex(toIndex, view); 226f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen } 227f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen } 228839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 2293352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen private void setupStackSlider(View v, int mode) { 2303352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mStackSlider.setMode(mode); 2313352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen if (v != null) { 2323352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mHighlight.setImageBitmap(sHolographicHelper.createOutline(v)); 2333352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mHighlight.setRotation(v.getRotation()); 2343352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mHighlight.setTranslationY(v.getTranslationY()); 2353352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mHighlight.bringToFront(); 2363352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen v.bringToFront(); 2373352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mStackSlider.setView(v); 2383352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen 2393352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen v.setVisibility(VISIBLE); 2403352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen } 2413352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen } 2423352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen 2433352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen @Override 2443352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen @android.view.RemotableViewMethod 2453352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen public void showNext() { 2463352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen if (!mTransitionIsSetup) { 2473352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen View v = getViewAtRelativeIndex(1); 2483352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen if (v != null) { 2493352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen setupStackSlider(v, StackSlider.NORMAL_MODE); 2503352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mStackSlider.setYProgress(0); 2513352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mStackSlider.setXProgress(0); 2523352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen } 2533352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen } 2543352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen super.showNext(); 2553352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen } 2563352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen 2573352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen @Override 2583352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen @android.view.RemotableViewMethod 2593352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen public void showPrevious() { 2603352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen if (!mTransitionIsSetup) { 2613352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen View v = getViewAtRelativeIndex(0); 2623352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen if (v != null) { 2633352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen setupStackSlider(v, StackSlider.NORMAL_MODE); 2643352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mStackSlider.setYProgress(1); 2653352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mStackSlider.setXProgress(0); 2663352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen } 2673352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen } 2683352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen super.showPrevious(); 2693352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen } 2703352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen 271f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen private void transformViewAtIndex(int index, View view) { 272dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen float maxPerpectiveShift = mMeasuredHeight * PERSPECTIVE_SHIFT_FACTOR; 273839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 27496d8d56302da81b24333b204e6d7f15064538036Adam Cohen index = mMaxNumActiveViews - index - 1; 27596d8d56302da81b24333b204e6d7f15064538036Adam Cohen if (index == mMaxNumActiveViews - 1) index--; 276839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 27796d8d56302da81b24333b204e6d7f15064538036Adam Cohen float r = (index * 1.0f) / (mMaxNumActiveViews - 2); 278839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 279f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen float scale = 1 - PERSPECTIVE_SCALE_FACTOR * (1 - r); 2802794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", scale); 2812794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", scale); 282839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 283f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen r = (float) Math.pow(r, 2); 284839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 285f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen int stackDirection = (mStackMode == ITEMS_SLIDE_UP) ? 1 : -1; 286dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen float perspectiveTranslation = -stackDirection * r * maxPerpectiveShift; 287dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen float scaleShiftCorrection = stackDirection * (1 - scale) * 288dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen (mMeasuredHeight * (1 - PERSPECTIVE_SHIFT_FACTOR) / 2.0f); 289dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen float transY = perspectiveTranslation + scaleShiftCorrection; 290f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen 2912794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder translationY = PropertyValuesHolder.ofFloat("translationY", transY); 2922794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase ObjectAnimator pa = ObjectAnimator.ofPropertyValuesHolder(view, scaleX, scaleY, translationY); 2932794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase pa.setDuration(100); 294f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen pa.start(); 295f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen } 296f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen 29796d8d56302da81b24333b204e6d7f15064538036Adam Cohen @Override 29896d8d56302da81b24333b204e6d7f15064538036Adam Cohen void showOnly(int childIndex, boolean animate, boolean onLayout) { 29996d8d56302da81b24333b204e6d7f15064538036Adam Cohen super.showOnly(childIndex, animate, onLayout); 30096d8d56302da81b24333b204e6d7f15064538036Adam Cohen 30196d8d56302da81b24333b204e6d7f15064538036Adam Cohen // Here we need to make sure that the z-order of the children is correct 3023352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen for (int i = mCurrentWindowEnd; i >= mCurrentWindowStart; i--) { 30396d8d56302da81b24333b204e6d7f15064538036Adam Cohen int index = modulo(i, getWindowSize()); 30496d8d56302da81b24333b204e6d7f15064538036Adam Cohen View v = mViewsMap.get(index).view; 30596d8d56302da81b24333b204e6d7f15064538036Adam Cohen if (v != null) v.bringToFront(); 30696d8d56302da81b24333b204e6d7f15064538036Adam Cohen } 3073352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mTransitionIsSetup = false; 30896d8d56302da81b24333b204e6d7f15064538036Adam Cohen } 30996d8d56302da81b24333b204e6d7f15064538036Adam Cohen 310f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen private void updateChildTransforms() { 31196d8d56302da81b24333b204e6d7f15064538036Adam Cohen for (int i = 0; i < getNumActiveViews(); i++) { 312f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen View v = getViewAtRelativeIndex(i); 313f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen if (v != null) { 314f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen transformViewAtIndex(i, v); 315f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen } 316839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 31744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 31844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 319dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen @Override 320dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen FrameLayout getFrameForChild() { 321dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen FrameLayout fl = new FrameLayout(mContext); 322dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen fl.setPadding(mFramePadding, mFramePadding, mFramePadding, mFramePadding); 323dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen return fl; 324dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen } 325dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen 32644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen /** 32744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen * Apply any necessary tranforms for the child that is being added. 32844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen */ 32944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen void applyTransformForChildAtIndex(View child, int relativeIndex) { 33044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 33144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 33244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen @Override 3339b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen protected void dispatchDraw(Canvas canvas) { 334d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen canvas.getClipBounds(invalidateRect); 335d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen final int childCount = getChildCount(); 336d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen for (int i = 0; i < childCount; i++) { 337d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen LayoutParams lp = (LayoutParams) getChildAt(i).getLayoutParams(); 338d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen invalidateRect.union(lp.getInvalidateRect()); 339d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen lp.resetInvalidateRect(); 34044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 341d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen 342d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen canvas.save(Canvas.CLIP_SAVE_FLAG); 343d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen canvas.clipRect(invalidateRect, Region.Op.UNION); 344d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen super.dispatchDraw(canvas); 345d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen canvas.restore(); 3469b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 34744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 3489b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen private void onLayout() { 34944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (!mFirstLayoutHappened) { 350dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen mSlideAmount = Math.round(SLIDE_UP_RATIO * getMeasuredHeight()); 351f04e22571f17bf850ef89adddf2b12171e536619Adam Cohen updateChildTransforms(); 352dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen mSwipeThreshold = Math.round(SWIPE_THRESHOLD_RATIO * mSlideAmount); 35344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mFirstLayoutHappened = true; 35444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 35544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 35644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 35744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen @Override 35844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen public boolean onInterceptTouchEvent(MotionEvent ev) { 35944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen int action = ev.getAction(); 36044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen switch(action & MotionEvent.ACTION_MASK) { 36144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen case MotionEvent.ACTION_DOWN: { 36244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (mActivePointerId == INVALID_POINTER) { 36344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mInitialX = ev.getX(); 36444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mInitialY = ev.getY(); 36544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mActivePointerId = ev.getPointerId(0); 36644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 36744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen break; 36844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 36944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen case MotionEvent.ACTION_MOVE: { 37044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen int pointerIndex = ev.findPointerIndex(mActivePointerId); 37144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (pointerIndex == INVALID_POINTER) { 37244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // no data for our primary pointer, this shouldn't happen, log it 37344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen Log.d(TAG, "Error: No data for our primary pointer."); 37444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen return false; 37544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 37644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen float newY = ev.getY(pointerIndex); 37744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen float deltaY = newY - mInitialY; 37844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 37932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen beginGestureIfNeeded(deltaY); 38044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen break; 38144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 38244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen case MotionEvent.ACTION_POINTER_UP: { 38344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen onSecondaryPointerUp(ev); 38444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen break; 38544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 38644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen case MotionEvent.ACTION_UP: 38744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen case MotionEvent.ACTION_CANCEL: { 38844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mActivePointerId = INVALID_POINTER; 38944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mSwipeGestureType = GESTURE_NONE; 39044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 39144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 39244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 39344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen return mSwipeGestureType != GESTURE_NONE; 39444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 39544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 39632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen private void beginGestureIfNeeded(float deltaY) { 39732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen if ((int) Math.abs(deltaY) > mTouchSlop && mSwipeGestureType == GESTURE_NONE) { 3983d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen int swipeGestureType = deltaY < 0 ? GESTURE_SLIDE_UP : GESTURE_SLIDE_DOWN; 39932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen cancelLongPress(); 40032a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen requestDisallowInterceptTouchEvent(true); 40132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 402d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen if (mAdapter == null) return; 403d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen 404839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen int activeIndex; 405839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (mStackMode == ITEMS_SLIDE_UP) { 40696d8d56302da81b24333b204e6d7f15064538036Adam Cohen activeIndex = (swipeGestureType == GESTURE_SLIDE_DOWN) ? 0 : 1; 407839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } else { 40896d8d56302da81b24333b204e6d7f15064538036Adam Cohen activeIndex = (swipeGestureType == GESTURE_SLIDE_DOWN) ? 1 : 0; 409839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 41032a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 4113352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen int stackMode; 4121b065cd1401253f999caa5d0ac12909407cef00eAdam Cohen if (mLoopViews) { 4133352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen stackMode = StackSlider.NORMAL_MODE; 41496d8d56302da81b24333b204e6d7f15064538036Adam Cohen } else if (mCurrentWindowStartUnbounded + activeIndex == -1) { 41596d8d56302da81b24333b204e6d7f15064538036Adam Cohen activeIndex++; 4163352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen stackMode = StackSlider.BEGINNING_OF_STACK_MODE; 41796d8d56302da81b24333b204e6d7f15064538036Adam Cohen } else if (mCurrentWindowStartUnbounded + activeIndex == mAdapter.getCount() - 1) { 4183352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen stackMode = StackSlider.END_OF_STACK_MODE; 4193d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } else { 4203352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen stackMode = StackSlider.NORMAL_MODE; 42132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 4223d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 4233352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen mTransitionIsSetup = stackMode == StackSlider.NORMAL_MODE; 4243352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen 4253d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen View v = getViewAtRelativeIndex(activeIndex); 4263d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen if (v == null) return; 4273d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 4283352b6807f9b728b91cceb3ea5f2a065ace95da3Adam Cohen setupStackSlider(v, stackMode); 4293d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 4303d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen // We only register this gesture if we've made it this far without a problem 4313d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mSwipeGestureType = swipeGestureType; 432a32edd4b4c894f4fb3d9fd7e9d5b80321df79e20Adam Cohen cancelHandleClick(); 43332a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 43432a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 43532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 43644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen @Override 43744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen public boolean onTouchEvent(MotionEvent ev) { 438a32edd4b4c894f4fb3d9fd7e9d5b80321df79e20Adam Cohen super.onTouchEvent(ev); 439a32edd4b4c894f4fb3d9fd7e9d5b80321df79e20Adam Cohen 44044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen int action = ev.getAction(); 44144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen int pointerIndex = ev.findPointerIndex(mActivePointerId); 44244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (pointerIndex == INVALID_POINTER) { 44344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // no data for our primary pointer, this shouldn't happen, log it 44444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen Log.d(TAG, "Error: No data for our primary pointer."); 44544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen return false; 44644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 44744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 44844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen float newY = ev.getY(pointerIndex); 44932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen float newX = ev.getX(pointerIndex); 45044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen float deltaY = newY - mInitialY; 45132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen float deltaX = newX - mInitialX; 45244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (mVelocityTracker == null) { 45344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mVelocityTracker = VelocityTracker.obtain(); 45444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 45544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mVelocityTracker.addMovement(ev); 45644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 45744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen switch (action & MotionEvent.ACTION_MASK) { 45844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen case MotionEvent.ACTION_MOVE: { 45932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen beginGestureIfNeeded(deltaY); 46032a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 461dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen float rx = deltaX / (mSlideAmount * 1.0f); 46232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen if (mSwipeGestureType == GESTURE_SLIDE_DOWN) { 463dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen float r = (deltaY - mTouchSlop * 1.0f) / mSlideAmount * 1.0f; 464839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (mStackMode == ITEMS_SLIDE_DOWN) r = 1 - r; 46532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mStackSlider.setYProgress(1 - r); 46632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mStackSlider.setXProgress(rx); 46732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen return true; 46832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } else if (mSwipeGestureType == GESTURE_SLIDE_UP) { 469dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen float r = -(deltaY + mTouchSlop * 1.0f) / mSlideAmount * 1.0f; 470839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (mStackMode == ITEMS_SLIDE_DOWN) r = 1 - r; 47132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mStackSlider.setYProgress(r); 47232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mStackSlider.setXProgress(rx); 47332a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen return true; 47444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 47544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen break; 47644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 47744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen case MotionEvent.ACTION_UP: { 47844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen handlePointerUp(ev); 47944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen break; 48044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 48144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen case MotionEvent.ACTION_POINTER_UP: { 48244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen onSecondaryPointerUp(ev); 48344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen break; 48444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 48544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen case MotionEvent.ACTION_CANCEL: { 48644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mActivePointerId = INVALID_POINTER; 48744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mSwipeGestureType = GESTURE_NONE; 48844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen break; 48944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 49044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 49144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen return true; 49244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 49344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 49444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private final Rect touchRect = new Rect(); 49544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private void onSecondaryPointerUp(MotionEvent ev) { 49644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen final int activePointerIndex = ev.getActionIndex(); 49744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen final int pointerId = ev.getPointerId(activePointerIndex); 49844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (pointerId == mActivePointerId) { 49944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 50096d8d56302da81b24333b204e6d7f15064538036Adam Cohen int activeViewIndex = (mSwipeGestureType == GESTURE_SLIDE_DOWN) ? 0 : 1; 50144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 50244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen View v = getViewAtRelativeIndex(activeViewIndex); 50344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (v == null) return; 50444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 50544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Our primary pointer has gone up -- let's see if we can find 50644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // another pointer on the view. If so, then we should replace 50744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // our primary pointer with this new pointer and adjust things 50844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // so that the view doesn't jump 50944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen for (int index = 0; index < ev.getPointerCount(); index++) { 51044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (index != activePointerIndex) { 51144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 51244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen float x = ev.getX(index); 51344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen float y = ev.getY(index); 51444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 51544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen touchRect.set(v.getLeft(), v.getTop(), v.getRight(), v.getBottom()); 5165b53f9186e7812c93bc578d18e92cb123481fcbcRomain Guy if (touchRect.contains(Math.round(x), Math.round(y))) { 51744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen float oldX = ev.getX(activePointerIndex); 51844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen float oldY = ev.getY(activePointerIndex); 51944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 52044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // adjust our frame of reference to avoid a jump 52144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mInitialY += (y - oldY); 52244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mInitialX += (x - oldX); 52344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 52444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mActivePointerId = ev.getPointerId(index); 52544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (mVelocityTracker != null) { 52644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mVelocityTracker.clear(); 52744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 52844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // ok, we're good, we found a new pointer which is touching the active view 52944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen return; 53044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 53144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 53244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 53344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // if we made it this far, it means we didn't find a satisfactory new pointer :(, 5343d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen // so end the gesture 53544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen handlePointerUp(ev); 53644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 53744729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 53844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 53944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen private void handlePointerUp(MotionEvent ev) { 54044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen int pointerIndex = ev.findPointerIndex(mActivePointerId); 54144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen float newY = ev.getY(pointerIndex); 54244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen int deltaY = (int) (newY - mInitialY); 54344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 5443d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen if (mVelocityTracker != null) { 5453d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mVelocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 5463d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mYVelocity = (int) mVelocityTracker.getYVelocity(mActivePointerId); 5473d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } 54844729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 54944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen if (mVelocityTracker != null) { 55044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mVelocityTracker.recycle(); 55144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mVelocityTracker = null; 55244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 55344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 5543d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen if (deltaY > mSwipeThreshold && mSwipeGestureType == GESTURE_SLIDE_DOWN 5553d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen && mStackSlider.mMode == StackSlider.NORMAL_MODE) { 55644729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Swipe threshold exceeded, swipe down 557839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (mStackMode == ITEMS_SLIDE_UP) { 558839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen showPrevious(); 55996d8d56302da81b24333b204e6d7f15064538036Adam Cohen } else { 56096d8d56302da81b24333b204e6d7f15064538036Adam Cohen showNext(); 561839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 56232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mHighlight.bringToFront(); 5633d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } else if (deltaY < -mSwipeThreshold && mSwipeGestureType == GESTURE_SLIDE_UP 5643d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen && mStackSlider.mMode == StackSlider.NORMAL_MODE) { 56544729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Swipe threshold exceeded, swipe up 566839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (mStackMode == ITEMS_SLIDE_UP) { 567839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen showNext(); 56896d8d56302da81b24333b204e6d7f15064538036Adam Cohen } else { 56996d8d56302da81b24333b204e6d7f15064538036Adam Cohen showPrevious(); 570839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 571839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 57232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mHighlight.bringToFront(); 573839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } else if (mSwipeGestureType == GESTURE_SLIDE_UP ) { 57444729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Didn't swipe up far enough, snap back down 575839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen int duration; 576839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float finalYProgress = (mStackMode == ITEMS_SLIDE_DOWN) ? 1 : 0; 577839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (mStackMode == ITEMS_SLIDE_UP || mStackSlider.mMode != StackSlider.NORMAL_MODE) { 578839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen duration = Math.round(mStackSlider.getDurationForNeutralPosition()); 579839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } else { 580839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen duration = Math.round(mStackSlider.getDurationForOffscreenPosition()); 581839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 58232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 583b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen StackSlider animationSlider = new StackSlider(mStackSlider); 5842794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder snapBackY = PropertyValuesHolder.ofFloat("YProgress", finalYProgress); 5852794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder snapBackX = PropertyValuesHolder.ofFloat("XProgress", 0.0f); 5862794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase ObjectAnimator pa = ObjectAnimator.ofPropertyValuesHolder(animationSlider, 587839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen snapBackX, snapBackY); 5882794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase pa.setDuration(duration); 589839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen pa.setInterpolator(new LinearInterpolator()); 590839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen pa.start(); 59132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } else if (mSwipeGestureType == GESTURE_SLIDE_DOWN) { 59244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen // Didn't swipe down far enough, snap back up 593839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float finalYProgress = (mStackMode == ITEMS_SLIDE_DOWN) ? 0 : 1; 594839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen int duration; 595839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (mStackMode == ITEMS_SLIDE_DOWN || mStackSlider.mMode != StackSlider.NORMAL_MODE) { 596839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen duration = Math.round(mStackSlider.getDurationForNeutralPosition()); 597839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } else { 598839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen duration = Math.round(mStackSlider.getDurationForOffscreenPosition()); 599839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 6003d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 601b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen StackSlider animationSlider = new StackSlider(mStackSlider); 6022794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder snapBackY = 6032794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder.ofFloat("YProgress",finalYProgress); 6042794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase PropertyValuesHolder snapBackX = PropertyValuesHolder.ofFloat("XProgress", 0.0f); 6052794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase ObjectAnimator pa = ObjectAnimator.ofPropertyValuesHolder(animationSlider, 606839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen snapBackX, snapBackY); 6072794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase pa.setDuration(duration); 608839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen pa.start(); 60944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 61044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 61144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mActivePointerId = INVALID_POINTER; 61244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen mSwipeGestureType = GESTURE_NONE; 61332a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 61432a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 61532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen private class StackSlider { 61632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen View mView; 61732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen float mYProgress; 61832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen float mXProgress; 61932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 6203d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen static final int NORMAL_MODE = 0; 6213d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen static final int BEGINNING_OF_STACK_MODE = 1; 6223d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen static final int END_OF_STACK_MODE = 2; 6233d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 6243d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen int mMode = NORMAL_MODE; 6253d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 626b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen public StackSlider() { 627b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen } 628b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen 629b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen public StackSlider(StackSlider copy) { 630b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen mView = copy.mView; 631b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen mYProgress = copy.mYProgress; 632b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen mXProgress = copy.mXProgress; 6333d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mMode = copy.mMode; 634b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen } 635b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen 63632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen private float cubic(float r) { 637839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return (float) (Math.pow(2 * r - 1, 3) + 1) / 2.0f; 63832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 63932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 64032a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen private float highlightAlphaInterpolator(float r) { 64132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen float pivot = 0.4f; 64232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen if (r < pivot) { 643839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return 0.85f * cubic(r / pivot); 64432a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } else { 645839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return 0.85f * cubic(1 - (r - pivot) / (1 - pivot)); 64632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 64732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 64832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 64932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen private float viewAlphaInterpolator(float r) { 65032a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen float pivot = 0.3f; 65132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen if (r > pivot) { 652839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return (r - pivot) / (1 - pivot); 65332a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } else { 65432a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen return 0; 65532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 65632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 65732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 658b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen private float rotationInterpolator(float r) { 659b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen float pivot = 0.2f; 660b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen if (r < pivot) { 661b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen return 0; 662b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen } else { 663839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return (r - pivot) / (1 - pivot); 664b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen } 665b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen } 666b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen 66732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen void setView(View v) { 66832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mView = v; 66932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 67032a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 67132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen public void setYProgress(float r) { 67232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen // enforce r between 0 and 1 67332a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen r = Math.min(1.0f, r); 67432a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen r = Math.max(0, r); 67532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 67632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mYProgress = r; 67732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen final LayoutParams viewLp = (LayoutParams) mView.getLayoutParams(); 67832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen final LayoutParams highlightLp = (LayoutParams) mHighlight.getLayoutParams(); 67932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 680839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen int stackDirection = (mStackMode == ITEMS_SLIDE_UP) ? 1 : -1; 681839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 6823d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen switch (mMode) { 6833d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen case NORMAL_MODE: 684dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen viewLp.setVerticalOffset(Math.round(-r * stackDirection * mSlideAmount)); 685dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen highlightLp.setVerticalOffset(Math.round(-r * stackDirection * mSlideAmount)); 6863d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mHighlight.setAlpha(highlightAlphaInterpolator(r)); 6873d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 688839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float alpha = viewAlphaInterpolator(1 - r); 6893d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 6903d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen // We make sure that views which can't be seen (have 0 alpha) are also invisible 6913d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen // so that they don't interfere with click events. 6923d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen if (mView.getAlpha() == 0 && alpha != 0 && mView.getVisibility() != VISIBLE) { 6933d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mView.setVisibility(VISIBLE); 6943d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } else if (alpha == 0 && mView.getAlpha() != 0 6953d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen && mView.getVisibility() == VISIBLE) { 6963d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mView.setVisibility(INVISIBLE); 6973d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } 698b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen 6993d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mView.setAlpha(alpha); 700839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen mView.setRotationX(stackDirection * 90.0f * rotationInterpolator(r)); 701839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen mHighlight.setRotationX(stackDirection * 90.0f * rotationInterpolator(r)); 7023d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen break; 70396d8d56302da81b24333b204e6d7f15064538036Adam Cohen case END_OF_STACK_MODE: 704839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen r = r * 0.2f; 705dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen viewLp.setVerticalOffset(Math.round(-stackDirection * r * mSlideAmount)); 706dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen highlightLp.setVerticalOffset(Math.round(-stackDirection * r * mSlideAmount)); 7073d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mHighlight.setAlpha(highlightAlphaInterpolator(r)); 7083d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen break; 70996d8d56302da81b24333b204e6d7f15064538036Adam Cohen case BEGINNING_OF_STACK_MODE: 710839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen r = (1-r) * 0.2f; 711dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen viewLp.setVerticalOffset(Math.round(stackDirection * r * mSlideAmount)); 712dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen highlightLp.setVerticalOffset(Math.round(stackDirection * r * mSlideAmount)); 7133d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mHighlight.setAlpha(highlightAlphaInterpolator(r)); 7143d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen break; 715b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen } 71632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 71732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 71832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen public void setXProgress(float r) { 71932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen // enforce r between 0 and 1 7203d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen r = Math.min(2.0f, r); 7213d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen r = Math.max(-2.0f, r); 72232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 72332a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen mXProgress = r; 72432a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 72532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen final LayoutParams viewLp = (LayoutParams) mView.getLayoutParams(); 72632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen final LayoutParams highlightLp = (LayoutParams) mHighlight.getLayoutParams(); 72732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 7283d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen r *= 0.2f; 729dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen viewLp.setHorizontalOffset(Math.round(r * mSlideAmount)); 730dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen highlightLp.setHorizontalOffset(Math.round(r * mSlideAmount)); 73132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 73232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 7333d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen void setMode(int mode) { 7343d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen mMode = mode; 7353d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } 7363d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 7373d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen float getDurationForNeutralPosition() { 738839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return getDuration(false, 0); 7393d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } 7403d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 7413d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen float getDurationForOffscreenPosition() { 742839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return getDuration(true, 0); 743839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 744839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 745839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float getDurationForNeutralPosition(float velocity) { 746839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return getDuration(false, velocity); 747839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 748839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 749839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float getDurationForOffscreenPosition(float velocity) { 750839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return getDuration(true, velocity); 7513d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } 7523d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 753839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen private float getDuration(boolean invert, float velocity) { 7543d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen if (mView != null) { 7553d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen final LayoutParams viewLp = (LayoutParams) mView.getLayoutParams(); 7563d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 757839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float d = (float) Math.sqrt(Math.pow(viewLp.horizontalOffset, 2) + 758839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen Math.pow(viewLp.verticalOffset, 2)); 759dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen float maxd = (float) Math.sqrt(Math.pow(mSlideAmount, 2) + 760dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen Math.pow(0.4f * mSlideAmount, 2)); 761839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 762839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (velocity == 0) { 763839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return (invert ? (1 - d / maxd) : d / maxd) * DEFAULT_ANIMATION_DURATION; 764839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } else { 765839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float duration = invert ? d / Math.abs(velocity) : 766839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen (maxd - d) / Math.abs(velocity); 767839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (duration < MINIMUM_ANIMATION_DURATION || 768839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen duration > DEFAULT_ANIMATION_DURATION) { 769839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return getDuration(invert, 0); 770839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } else { 771839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen return duration; 772839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 773839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 7743d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } 7753d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen return 0; 7763d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen } 7773d07af03421f4727ef7e97c5c19e6ade50b19060Adam Cohen 778e5ebcb0107a939395e03592fd44c746cd09e311dRomain Guy // Used for animations 779e5ebcb0107a939395e03592fd44c746cd09e311dRomain Guy @SuppressWarnings({"UnusedDeclaration"}) 780839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen public float getYProgress() { 78132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen return mYProgress; 78232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 78332a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 784e5ebcb0107a939395e03592fd44c746cd09e311dRomain Guy // Used for animations 785e5ebcb0107a939395e03592fd44c746cd09e311dRomain Guy @SuppressWarnings({"UnusedDeclaration"}) 786839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen public float getXProgress() { 78732a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen return mXProgress; 78832a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 78944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 79044729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen 79144729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen @Override 79244729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen public void onRemoteAdapterConnected() { 79344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen super.onRemoteAdapterConnected(); 7941480fddea874a42adb43b4bcdac6704e4c3e110bAdam Cohen // On first run, we want to set the stack to the end. 79596d8d56302da81b24333b204e6d7f15064538036Adam Cohen if (mWhichChild == -1) { 79696d8d56302da81b24333b204e6d7f15064538036Adam Cohen mWhichChild = 0; 7973042944c6ec68210ba1746540b53789e70d15ef4Adam Cohen } 79896d8d56302da81b24333b204e6d7f15064538036Adam Cohen setDisplayedChild(mWhichChild); 79944729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen } 80032a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 8019b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen LayoutParams createOrReuseLayoutParams(View v) { 8029b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen final ViewGroup.LayoutParams currentLp = v.getLayoutParams(); 8039b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen if (currentLp instanceof LayoutParams) { 8049b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen LayoutParams lp = (LayoutParams) currentLp; 8059b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen lp.setHorizontalOffset(0); 8069b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen lp.setVerticalOffset(0); 807839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen lp.width = 0; 808839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen lp.width = 0; 8099b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen return lp; 8109b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 8119b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen return new LayoutParams(v); 81232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 81332a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 8149b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen @Override 8159b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 8169b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen boolean dataChanged = mDataChanged; 8179b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen if (dataChanged) { 8189b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen handleDataChanged(); 8199b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 8209b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen // if the data changes, mWhichChild might be out of the bounds of the adapter 8219b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen // in this case, we reset mWhichChild to the beginning 8229b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen if (mWhichChild >= mAdapter.getCount()) 8239b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mWhichChild = 0; 8249b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 8259b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen showOnly(mWhichChild, true, true); 8266364f2bbe5254b4274f3feffc48f4259eacc205eWinson Chung refreshChildren(); 8279b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 8289b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 8299b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen final int childCount = getChildCount(); 8309b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen for (int i = 0; i < childCount; i++) { 8319b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen final View child = getChildAt(i); 8329b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 8339b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int childRight = mPaddingLeft + child.getMeasuredWidth(); 8349b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int childBottom = mPaddingTop + child.getMeasuredHeight(); 8359b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen LayoutParams lp = (LayoutParams) child.getLayoutParams(); 8369b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 8379b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen child.layout(mPaddingLeft + lp.horizontalOffset, mPaddingTop + lp.verticalOffset, 8389b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen childRight + lp.horizontalOffset, childBottom + lp.verticalOffset); 8399b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 8409b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 8419b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 8429b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mDataChanged = false; 8439b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen onLayout(); 8449b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 8459b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 846839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen private void measureChildren() { 847839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen final int count = getChildCount(); 848839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen final int childWidth = mMeasuredWidth - mPaddingLeft - mPaddingRight; 849839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen final int childHeight = Math.round(mMeasuredHeight*(1-PERSPECTIVE_SHIFT_FACTOR)) 850839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen - mPaddingTop - mPaddingBottom; 851839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 852839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen for (int i = 0; i < count; i++) { 853839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen final View child = getChildAt(i); 854839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen child.measure(MeasureSpec.makeMeasureSpec(childWidth, MeasureSpec.EXACTLY), 855839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen MeasureSpec.makeMeasureSpec(childHeight, MeasureSpec.EXACTLY)); 856839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 857839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 858839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 859839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen @Override 860839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 861839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); 862839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); 863839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen final int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); 864839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen final int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); 865839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 866839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen boolean haveChildRefSize = (mReferenceChildWidth != -1 && mReferenceChildHeight != -1); 867839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 868839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen // We need to deal with the case where our parent hasn't told us how 869839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen // big we should be. In this case we should 870839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float factor = 1/(1 - PERSPECTIVE_SHIFT_FACTOR); 871839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (heightSpecMode == MeasureSpec.UNSPECIFIED) { 872839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen heightSpecSize = haveChildRefSize ? 873839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen Math.round(mReferenceChildHeight * (1 + factor)) + 874839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen mPaddingTop + mPaddingBottom : 0; 875839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } else if (heightSpecMode == MeasureSpec.AT_MOST) { 876839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen heightSpecSize = haveChildRefSize ? Math.min( 877839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen Math.round(mReferenceChildHeight * (1 + factor)) + mPaddingTop + 878839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen mPaddingBottom, heightSpecSize) : 0; 879839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 880839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 881839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen if (widthSpecMode == MeasureSpec.UNSPECIFIED) { 882839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen widthSpecSize = haveChildRefSize ? mReferenceChildWidth + mPaddingLeft + 883839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen mPaddingRight : 0; 884839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } else if (heightSpecMode == MeasureSpec.AT_MOST) { 885839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen widthSpecSize = haveChildRefSize ? Math.min(mReferenceChildWidth + mPaddingLeft + 886839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen mPaddingRight, widthSpecSize) : 0; 887839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 888839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 889839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen setMeasuredDimension(widthSpecSize, heightSpecSize); 890839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen measureChildren(); 891839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen } 892839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 8939b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen class LayoutParams extends ViewGroup.LayoutParams { 8949b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int horizontalOffset; 8959b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int verticalOffset; 8969b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen View mView; 897d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen int left, top, right, bottom; 898d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen private final Rect parentRect = new Rect(); 899d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen private final Rect invalidateRect = new Rect(); 900d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen private final RectF invalidateRectf = new RectF(); 901d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen private final Rect globalInvalidateRect = new Rect(); 9029b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 9039b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen LayoutParams(View view) { 9049b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen super(0, 0); 905839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen width = 0; 906839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen height = 0; 9079b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen horizontalOffset = 0; 9089b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen verticalOffset = 0; 9099b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mView = view; 9109b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 9119b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 9129b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen LayoutParams(Context c, AttributeSet attrs) { 9139b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen super(c, attrs); 9149b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen horizontalOffset = 0; 9159b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen verticalOffset = 0; 916839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen width = 0; 917839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen height = 0; 918b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen } 919b04f7ad90b7d5d5e0998e3b56960004cf56e6e8fAdam Cohen 9209b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen void invalidateGlobalRegion(View v, Rect r) { 921d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen // We need to make a new rect here, so as not to modify the one passed 922d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen globalInvalidateRect.set(r); 9239b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen View p = v; 9249b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen if (!(v.getParent() != null && v.getParent() instanceof View)) return; 9259b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 9269b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen boolean firstPass = true; 9279b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen parentRect.set(0, 0, 0, 0); 9289b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int depth = 0; 929b7f4d030a2ed9301bf47c41fefc1b338f4347ffeAdam Cohen while (p.getParent() != null && p.getParent() instanceof View 930d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen && !parentRect.contains(globalInvalidateRect)) { 9319b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen if (!firstPass) { 932d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen globalInvalidateRect.offset(p.getLeft() - p.getScrollX(), p.getTop() 933d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen - p.getScrollY()); 9349b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen depth++; 9359b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 9369b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen firstPass = false; 9379b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen p = (View) p.getParent(); 938b7f4d030a2ed9301bf47c41fefc1b338f4347ffeAdam Cohen parentRect.set(p.getScrollX(), p.getScrollY(), 939b7f4d030a2ed9301bf47c41fefc1b338f4347ffeAdam Cohen p.getWidth() + p.getScrollX(), p.getHeight() + p.getScrollY()); 940839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen 9419b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 9429b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 943d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen p.invalidate(globalInvalidateRect.left, globalInvalidateRect.top, 944d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen globalInvalidateRect.right, globalInvalidateRect.bottom); 945d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen } 946d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen 947d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen Rect getInvalidateRect() { 948d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen return invalidateRect; 949d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen } 9509b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 951d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen void resetInvalidateRect() { 952d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen invalidateRect.set(0, 0, 0, 0); 9539b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 95432a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 955a18a86b43e40e3c15dcca0ae0148d641be9b25feChet Haase // This is public so that ObjectAnimator can access it 9569b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen public void setVerticalOffset(int newVerticalOffset) { 9579b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int offsetDelta = newVerticalOffset - verticalOffset; 9589b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen verticalOffset = newVerticalOffset; 95932a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 9609b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen if (mView != null) { 9619b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mView.requestLayout(); 9629b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int top = Math.min(mView.getTop() + offsetDelta, mView.getTop()); 9639b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int bottom = Math.max(mView.getBottom() + offsetDelta, mView.getBottom()); 9649b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 965d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen invalidateRectf.set(mView.getLeft(), top, mView.getRight(), bottom); 9669b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 9679b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen float xoffset = -invalidateRectf.left; 9689b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen float yoffset = -invalidateRectf.top; 9699b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen invalidateRectf.offset(xoffset, yoffset); 9709b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mView.getMatrix().mapRect(invalidateRectf); 9719b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen invalidateRectf.offset(-xoffset, -yoffset); 972d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen invalidateRect.union((int) Math.floor(invalidateRectf.left), 9739b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen (int) Math.floor(invalidateRectf.top), 9749b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen (int) Math.ceil(invalidateRectf.right), 9759b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen (int) Math.ceil(invalidateRectf.bottom)); 9769b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 9779b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen invalidateGlobalRegion(mView, invalidateRect); 9789b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 9799b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 9809b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 9819b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen public void setHorizontalOffset(int newHorizontalOffset) { 9829b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int offsetDelta = newHorizontalOffset - horizontalOffset; 9839b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen horizontalOffset = newHorizontalOffset; 9849b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 9859b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen if (mView != null) { 9869b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mView.requestLayout(); 9879b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int left = Math.min(mView.getLeft() + offsetDelta, mView.getLeft()); 9889b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen int right = Math.max(mView.getRight() + offsetDelta, mView.getRight()); 9899b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen invalidateRectf.set(left, mView.getTop(), right, mView.getBottom()); 9909b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 9919b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen float xoffset = -invalidateRectf.left; 9929b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen float yoffset = -invalidateRectf.top; 9939b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen invalidateRectf.offset(xoffset, yoffset); 9949b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mView.getMatrix().mapRect(invalidateRectf); 9959b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen invalidateRectf.offset(-xoffset, -yoffset); 9969b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 997d51bbb5b56446519db88f49f2682da782b0069acAdam Cohen invalidateRect.union((int) Math.floor(invalidateRectf.left), 9989b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen (int) Math.floor(invalidateRectf.top), 9999b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen (int) Math.ceil(invalidateRectf.right), 10009b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen (int) Math.ceil(invalidateRectf.bottom)); 10019b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 10029b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen invalidateGlobalRegion(mView, invalidateRect); 10039b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 10049b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 100532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 100632a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 10079b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen private static class HolographicHelper { 10089b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen private final Paint mHolographicPaint = new Paint(); 10099b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen private final Paint mErasePaint = new Paint(); 1010839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen private final Paint mBlurPaint = new Paint(); 101132a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 1012dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen HolographicHelper(Context context) { 1013dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen initializePaints(context); 10149b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 10159b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 1016dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen void initializePaints(Context context) { 1017dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen final float density = context.getResources().getDisplayMetrics().density; 1018dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen 10199b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mHolographicPaint.setColor(0xff6699ff); 10209b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mHolographicPaint.setFilterBitmap(true); 1021839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen mHolographicPaint.setMaskFilter(TableMaskFilter.CreateClipTable(0, 30)); 10229b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 10239b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mErasePaint.setFilterBitmap(true); 1024dfcdddd7c408dddb22fb0867e4799d4c29d2f55fAdam Cohen mBlurPaint.setMaskFilter(new BlurMaskFilter(2*density, BlurMaskFilter.Blur.NORMAL)); 10259b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 10269b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 10279b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen Bitmap createOutline(View v) { 10289b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen if (v.getMeasuredWidth() == 0 || v.getMeasuredHeight() == 0) { 10299b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen return null; 10309b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 10319b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 10329b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen Bitmap bitmap = Bitmap.createBitmap(v.getMeasuredWidth(), v.getMeasuredHeight(), 10339b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen Bitmap.Config.ARGB_8888); 10349b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen Canvas canvas = new Canvas(bitmap); 103532a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen 10369b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen float rotationX = v.getRotationX(); 1037839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float rotation = v.getRotation(); 1038839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen float translationY = v.getTranslationY(); 10399b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen v.setRotationX(0); 1040839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen v.setRotation(0); 1041839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen v.setTranslationY(0); 10429b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen v.draw(canvas); 10439b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen v.setRotationX(rotationX); 1044839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen v.setRotation(rotation); 1045839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen v.setTranslationY(translationY); 10469b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 10479b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen drawOutline(canvas, bitmap); 10489b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen return bitmap; 10499b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 10509b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen 10519b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen final Matrix id = new Matrix(); 10529b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen void drawOutline(Canvas dest, Bitmap src) { 1053839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen int[] xy = new int[2]; 1054839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen Bitmap mask = src.extractAlpha(mBlurPaint, xy); 1055839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen Canvas maskCanvas = new Canvas(mask); 1056839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen maskCanvas.drawBitmap(src, -xy[0], -xy[1], mErasePaint); 10579b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen dest.drawColor(0, PorterDuff.Mode.CLEAR); 10589b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen dest.setMatrix(id); 1059839f4a54e5a6fe602dbc5998b01412d809eba722Adam Cohen dest.drawBitmap(mask, xy[0], xy[1], mHolographicPaint); 10609b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen mask.recycle(); 10619b073948cfb84c0dd04f8a94ee1f7f263f027c83Adam Cohen } 106232a42f1587db77b958d62c3de4f2734eb0a3b965Adam Cohen } 106344729e3d1c01265858eec566c7b7c676c46a7916Adam Cohen} 1064