1 /* 2 * Copyright (C) 2021 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 */ 16 package com.android.launcher3.taskbar; 17 18 import android.animation.Animator; 19 import android.animation.AnimatorListenerAdapter; 20 import android.animation.ObjectAnimator; 21 import android.annotation.Nullable; 22 import android.content.Context; 23 import android.graphics.Rect; 24 import android.util.AttributeSet; 25 import android.view.View; 26 27 import androidx.annotation.ColorInt; 28 import androidx.core.content.ContextCompat; 29 30 import com.android.launcher3.LauncherAnimUtils; 31 import com.android.launcher3.R; 32 33 /** 34 * View to render a handle that changes color based on the background to ensure contrast. Used for 35 * the taskbar when stashed as well as the bubble bar when stashed. 36 */ 37 public class StashedHandleView extends View { 38 39 private static final long COLOR_CHANGE_DURATION = 120; 40 41 private final @ColorInt int mStashedHandleLightColor; 42 private final @ColorInt int mStashedHandleDarkColor; 43 private final Rect mSampledRegion = new Rect(); 44 private final int[] mTmpArr = new int[2]; 45 46 private @Nullable ObjectAnimator mColorChangeAnim; 47 StashedHandleView(Context context)48 public StashedHandleView(Context context) { 49 this(context, null); 50 } 51 StashedHandleView(Context context, AttributeSet attrs)52 public StashedHandleView(Context context, AttributeSet attrs) { 53 this(context, attrs, 0); 54 } 55 StashedHandleView(Context context, AttributeSet attrs, int defStyleAttr)56 public StashedHandleView(Context context, AttributeSet attrs, int defStyleAttr) { 57 this(context, attrs, defStyleAttr, 0); 58 } 59 StashedHandleView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)60 public StashedHandleView(Context context, AttributeSet attrs, int defStyleAttr, 61 int defStyleRes) { 62 super(context, attrs, defStyleAttr, defStyleRes); 63 64 mStashedHandleLightColor = ContextCompat.getColor(context, 65 R.color.taskbar_stashed_handle_light_color); 66 mStashedHandleDarkColor = ContextCompat.getColor(context, 67 R.color.taskbar_stashed_handle_dark_color); 68 } 69 70 /** 71 * Updates mSampledRegion to be the location of the stashedHandleBounds relative to the screen. 72 * @see #getSampledRegion() 73 */ updateSampledRegion(Rect stashedHandleBounds)74 public void updateSampledRegion(Rect stashedHandleBounds) { 75 getLocationOnScreen(mTmpArr); 76 // Translations are temporary due to animations, remove them for the purpose of determining 77 // the final region we want sampled. 78 mTmpArr[0] -= Math.round(getTranslationX()); 79 mTmpArr[1] -= Math.round(getTranslationY()); 80 mSampledRegion.set(stashedHandleBounds); 81 mSampledRegion.offset(mTmpArr[0], mTmpArr[1]); 82 } 83 getSampledRegion()84 public Rect getSampledRegion() { 85 return mSampledRegion; 86 } 87 88 /** 89 * Updates the handle color. 90 * @param isRegionDark Whether the background behind the handle is dark, and thus the handle 91 * should be light (and vice versa). 92 * @param animate Whether to animate the change, or apply it immediately. 93 */ updateHandleColor(boolean isRegionDark, boolean animate)94 public void updateHandleColor(boolean isRegionDark, boolean animate) { 95 int newColor = isRegionDark ? mStashedHandleLightColor : mStashedHandleDarkColor; 96 if (mColorChangeAnim != null) { 97 mColorChangeAnim.cancel(); 98 } 99 if (animate) { 100 mColorChangeAnim = ObjectAnimator.ofArgb(this, 101 LauncherAnimUtils.VIEW_BACKGROUND_COLOR, newColor); 102 mColorChangeAnim.addListener(new AnimatorListenerAdapter() { 103 @Override 104 public void onAnimationEnd(Animator animation) { 105 mColorChangeAnim = null; 106 } 107 }); 108 mColorChangeAnim.setDuration(COLOR_CHANGE_DURATION); 109 mColorChangeAnim.start(); 110 } else { 111 setBackgroundColor(newColor); 112 } 113 } 114 } 115