1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16package android.transition; 17 18import android.animation.Animator; 19import android.animation.AnimatorListenerAdapter; 20import android.animation.ObjectAnimator; 21import android.animation.TimeInterpolator; 22import android.graphics.Path; 23import android.transition.Transition.TransitionListener; 24import android.view.View; 25 26import com.android.internal.R; 27 28/** 29 * This class is used by Slide and Explode to create an animator that goes from the start 30 * position to the end position. It takes into account the canceled position so that it 31 * will not blink out or shift suddenly when the transition is interrupted. 32 */ 33class TranslationAnimationCreator { 34 35 /** 36 * Creates an animator that can be used for x and/or y translations. When interrupted, 37 * it sets a tag to keep track of the position so that it may be continued from position. 38 * 39 * @param view The view being moved. This may be in the overlay for onDisappear. 40 * @param values The values containing the view in the view hierarchy. 41 * @param viewPosX The x screen coordinate of view 42 * @param viewPosY The y screen coordinate of view 43 * @param startX The start translation x of view 44 * @param startY The start translation y of view 45 * @param endX The end translation x of view 46 * @param endY The end translation y of view 47 * @param interpolator The interpolator to use with this animator. 48 * @return An animator that moves from (startX, startY) to (endX, endY) unless there was 49 * a previous interruption, in which case it moves from the current position to (endX, endY). 50 */ 51 static Animator createAnimation(View view, TransitionValues values, int viewPosX, int viewPosY, 52 float startX, float startY, float endX, float endY, TimeInterpolator interpolator, 53 Transition transition) { 54 float terminalX = view.getTranslationX(); 55 float terminalY = view.getTranslationY(); 56 int[] startPosition = (int[]) values.view.getTag(R.id.transitionPosition); 57 if (startPosition != null) { 58 startX = startPosition[0] - viewPosX + terminalX; 59 startY = startPosition[1] - viewPosY + terminalY; 60 } 61 // Initial position is at translation startX, startY, so position is offset by that amount 62 int startPosX = viewPosX + Math.round(startX - terminalX); 63 int startPosY = viewPosY + Math.round(startY - terminalY); 64 65 view.setTranslationX(startX); 66 view.setTranslationY(startY); 67 if (startX == endX && startY == endY) { 68 return null; 69 } 70 Path path = new Path(); 71 path.moveTo(startX, startY); 72 path.lineTo(endX, endY); 73 ObjectAnimator anim = ObjectAnimator.ofFloat(view, View.TRANSLATION_X, View.TRANSLATION_Y, 74 path); 75 76 TransitionPositionListener listener = new TransitionPositionListener(view, values.view, 77 startPosX, startPosY, terminalX, terminalY); 78 transition.addListener(listener); 79 anim.addListener(listener); 80 anim.addPauseListener(listener); 81 anim.setInterpolator(interpolator); 82 return anim; 83 } 84 85 private static class TransitionPositionListener extends AnimatorListenerAdapter implements 86 TransitionListener { 87 88 private final View mViewInHierarchy; 89 private final View mMovingView; 90 private final int mStartX; 91 private final int mStartY; 92 private int[] mTransitionPosition; 93 private float mPausedX; 94 private float mPausedY; 95 private final float mTerminalX; 96 private final float mTerminalY; 97 98 private TransitionPositionListener(View movingView, View viewInHierarchy, 99 int startX, int startY, float terminalX, float terminalY) { 100 mMovingView = movingView; 101 mViewInHierarchy = viewInHierarchy; 102 mStartX = startX - Math.round(mMovingView.getTranslationX()); 103 mStartY = startY - Math.round(mMovingView.getTranslationY()); 104 mTerminalX = terminalX; 105 mTerminalY = terminalY; 106 mTransitionPosition = (int[]) mViewInHierarchy.getTag(R.id.transitionPosition); 107 if (mTransitionPosition != null) { 108 mViewInHierarchy.setTagInternal(R.id.transitionPosition, null); 109 } 110 } 111 112 @Override 113 public void onAnimationCancel(Animator animation) { 114 if (mTransitionPosition == null) { 115 mTransitionPosition = new int[2]; 116 } 117 mTransitionPosition[0] = Math.round(mStartX + mMovingView.getTranslationX()); 118 mTransitionPosition[1] = Math.round(mStartY + mMovingView.getTranslationY()); 119 mViewInHierarchy.setTagInternal(R.id.transitionPosition, mTransitionPosition); 120 } 121 122 @Override 123 public void onAnimationEnd(Animator animator) { 124 } 125 126 @Override 127 public void onAnimationPause(Animator animator) { 128 mPausedX = mMovingView.getTranslationX(); 129 mPausedY = mMovingView.getTranslationY(); 130 mMovingView.setTranslationX(mTerminalX); 131 mMovingView.setTranslationY(mTerminalY); 132 } 133 134 @Override 135 public void onAnimationResume(Animator animator) { 136 mMovingView.setTranslationX(mPausedX); 137 mMovingView.setTranslationY(mPausedY); 138 } 139 140 @Override 141 public void onTransitionStart(Transition transition) { 142 } 143 144 @Override 145 public void onTransitionEnd(Transition transition) { 146 mMovingView.setTranslationX(mTerminalX); 147 mMovingView.setTranslationY(mTerminalY); 148 transition.removeListener(this); 149 } 150 151 @Override 152 public void onTransitionCancel(Transition transition) { 153 } 154 155 @Override 156 public void onTransitionPause(Transition transition) { 157 } 158 159 @Override 160 public void onTransitionResume(Transition transition) { 161 } 162 } 163 164} 165