1 /* 2 * Copyright (C) 2016 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 17 package com.android.systemui.stackdivider; 18 19 import android.annotation.Nullable; 20 import android.content.Context; 21 import android.graphics.Canvas; 22 import android.graphics.Color; 23 import android.graphics.LinearGradient; 24 import android.graphics.Paint; 25 import android.graphics.Shader; 26 import android.util.AttributeSet; 27 import android.view.View; 28 import android.view.WindowManager; 29 30 import com.android.systemui.R; 31 32 /** 33 * Shadow for the minimized dock state on homescreen. 34 */ 35 public class MinimizedDockShadow extends View { 36 37 private final Paint mShadowPaint = new Paint(); 38 39 private int mDockSide = WindowManager.DOCKED_INVALID; 40 MinimizedDockShadow(Context context, @Nullable AttributeSet attrs)41 public MinimizedDockShadow(Context context, @Nullable AttributeSet attrs) { 42 super(context, attrs); 43 } 44 setDockSide(int dockSide)45 public void setDockSide(int dockSide) { 46 if (dockSide != mDockSide) { 47 mDockSide = dockSide; 48 updatePaint(getLeft(), getTop(), getRight(), getBottom()); 49 invalidate(); 50 } 51 } 52 updatePaint(int left, int top, int right, int bottom)53 private void updatePaint(int left, int top, int right, int bottom) { 54 int startColor = mContext.getResources().getColor( 55 R.color.minimize_dock_shadow_start, null); 56 int endColor = mContext.getResources().getColor( 57 R.color.minimize_dock_shadow_end, null); 58 final int middleColor = Color.argb( 59 (Color.alpha(startColor) + Color.alpha(endColor)) / 2, 0, 0, 0); 60 final int quarter = Color.argb( 61 (int) (Color.alpha(startColor) * 0.25f + Color.alpha(endColor) * 0.75f), 62 0, 0, 0); 63 if (mDockSide == WindowManager.DOCKED_TOP) { 64 mShadowPaint.setShader(new LinearGradient( 65 0, 0, 0, bottom - top, 66 new int[] { startColor, middleColor, quarter, endColor }, 67 new float[] { 0f, 0.35f, 0.6f, 1f }, Shader.TileMode.CLAMP)); 68 } else if (mDockSide == WindowManager.DOCKED_LEFT) { 69 mShadowPaint.setShader(new LinearGradient( 70 0, 0, right - left, 0, 71 new int[] { startColor, middleColor, quarter, endColor }, 72 new float[] { 0f, 0.35f, 0.6f, 1f }, Shader.TileMode.CLAMP)); 73 } else if (mDockSide == WindowManager.DOCKED_RIGHT) { 74 mShadowPaint.setShader(new LinearGradient( 75 right - left, 0, 0, 0, 76 new int[] { startColor, middleColor, quarter, endColor }, 77 new float[] { 0f, 0.35f, 0.6f, 1f }, Shader.TileMode.CLAMP)); 78 } 79 } 80 81 @Override onLayout(boolean changed, int left, int top, int right, int bottom)82 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 83 super.onLayout(changed, left, top, right, bottom); 84 if (changed) { 85 updatePaint(left, top, right, bottom); 86 invalidate(); 87 } 88 } 89 90 @Override onDraw(Canvas canvas)91 protected void onDraw(Canvas canvas) { 92 canvas.drawRect(0, 0, getWidth(), getHeight(), mShadowPaint); 93 } 94 95 @Override hasOverlappingRendering()96 public boolean hasOverlappingRendering() { 97 return false; 98 } 99 } 100