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 public class StashedHandleView extends View { 34 35 private static final long COLOR_CHANGE_DURATION = 120; 36 37 private final @ColorInt int mStashedHandleLightColor; 38 private final @ColorInt int mStashedHandleDarkColor; 39 private final Rect mSampledRegion = new Rect(); 40 private final int[] mTmpArr = new int[2]; 41 42 private @Nullable ObjectAnimator mColorChangeAnim; 43 StashedHandleView(Context context)44 public StashedHandleView(Context context) { 45 this(context, null); 46 } 47 StashedHandleView(Context context, AttributeSet attrs)48 public StashedHandleView(Context context, AttributeSet attrs) { 49 this(context, attrs, 0); 50 } 51 StashedHandleView(Context context, AttributeSet attrs, int defStyleAttr)52 public StashedHandleView(Context context, AttributeSet attrs, int defStyleAttr) { 53 this(context, attrs, defStyleAttr, 0); 54 } 55 StashedHandleView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)56 public StashedHandleView(Context context, AttributeSet attrs, int defStyleAttr, 57 int defStyleRes) { 58 super(context, attrs, defStyleAttr, defStyleRes); 59 60 mStashedHandleLightColor = ContextCompat.getColor(context, 61 R.color.taskbar_stashed_handle_light_color); 62 mStashedHandleDarkColor = ContextCompat.getColor(context, 63 R.color.taskbar_stashed_handle_dark_color); 64 } 65 66 /** 67 * Updates mSampledRegion to be the location of the stashedHandleBounds relative to the screen. 68 * @see #getSampledRegion() 69 */ updateSampledRegion(Rect stashedHandleBounds)70 public void updateSampledRegion(Rect stashedHandleBounds) { 71 getLocationOnScreen(mTmpArr); 72 // Translations are temporary due to animations, remove them for the purpose of determining 73 // the final region we want sampled. 74 mTmpArr[0] -= Math.round(getTranslationX()); 75 mTmpArr[1] -= Math.round(getTranslationY()); 76 mSampledRegion.set(stashedHandleBounds); 77 mSampledRegion.offset(mTmpArr[0], mTmpArr[1]); 78 } 79 getSampledRegion()80 public Rect getSampledRegion() { 81 return mSampledRegion; 82 } 83 84 /** 85 * Updates the handle color. 86 * @param isRegionDark Whether the background behind the handle is dark, and thus the handle 87 * should be light (and vice versa). 88 * @param animate Whether to animate the change, or apply it immediately. 89 */ updateHandleColor(boolean isRegionDark, boolean animate)90 public void updateHandleColor(boolean isRegionDark, boolean animate) { 91 int newColor = isRegionDark ? mStashedHandleLightColor : mStashedHandleDarkColor; 92 if (mColorChangeAnim != null) { 93 mColorChangeAnim.cancel(); 94 } 95 if (animate) { 96 mColorChangeAnim = ObjectAnimator.ofArgb(this, 97 LauncherAnimUtils.VIEW_BACKGROUND_COLOR, newColor); 98 mColorChangeAnim.addListener(new AnimatorListenerAdapter() { 99 @Override 100 public void onAnimationEnd(Animator animation) { 101 mColorChangeAnim = null; 102 } 103 }); 104 mColorChangeAnim.setDuration(COLOR_CHANGE_DURATION); 105 mColorChangeAnim.start(); 106 } else { 107 setBackgroundColor(newColor); 108 } 109 } 110 } 111