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.statusbar.notification; 18 19 import android.annotation.Nullable; 20 import android.content.Context; 21 import android.graphics.Outline; 22 import android.util.AttributeSet; 23 import android.view.View; 24 import android.view.ViewGroup; 25 import android.view.ViewOutlineProvider; 26 import android.widget.LinearLayout; 27 28 import com.android.systemui.R; 29 import com.android.systemui.statusbar.AlphaOptimizedFrameLayout; 30 31 /** 32 * A view used to cast a shadow of a certain size on another view 33 */ 34 public class FakeShadowView extends AlphaOptimizedFrameLayout { 35 public static final float SHADOW_SIBLING_TRESHOLD = 0.1f; 36 private final int mShadowMinHeight; 37 38 private View mFakeShadow; 39 private float mOutlineAlpha; 40 FakeShadowView(Context context)41 public FakeShadowView(Context context) { 42 this(context, null); 43 } 44 FakeShadowView(Context context, @Nullable AttributeSet attrs)45 public FakeShadowView(Context context, @Nullable AttributeSet attrs) { 46 this(context, attrs, 0); 47 } 48 FakeShadowView(Context context, @Nullable AttributeSet attrs, int defStyleAttr)49 public FakeShadowView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { 50 this(context, attrs, defStyleAttr, 0); 51 } 52 FakeShadowView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes)53 public FakeShadowView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, 54 int defStyleRes) { 55 super(context, attrs, defStyleAttr, defStyleRes); 56 mFakeShadow = new View(context); 57 mFakeShadow.setVisibility(INVISIBLE); 58 mFakeShadow.setLayoutParams(new LinearLayout.LayoutParams( 59 ViewGroup.LayoutParams.MATCH_PARENT, 60 (int) (48 * getResources().getDisplayMetrics().density))); 61 mFakeShadow.setOutlineProvider(new ViewOutlineProvider() { 62 @Override 63 public void getOutline(View view, Outline outline) { 64 outline.setRect(0, 0, getWidth(), mFakeShadow.getHeight()); 65 outline.setAlpha(mOutlineAlpha); 66 } 67 }); 68 addView(mFakeShadow); 69 mShadowMinHeight = Math.max(1, context.getResources() 70 .getDimensionPixelSize(R.dimen.notification_divider_height)); 71 } 72 setFakeShadowTranslationZ(float fakeShadowTranslationZ, float outlineAlpha, int shadowYEnd, int outlineTranslation)73 public void setFakeShadowTranslationZ(float fakeShadowTranslationZ, float outlineAlpha, 74 int shadowYEnd, int outlineTranslation) { 75 if (fakeShadowTranslationZ == 0.0f) { 76 mFakeShadow.setVisibility(INVISIBLE); 77 } else { 78 mFakeShadow.setVisibility(VISIBLE); 79 fakeShadowTranslationZ = Math.max(mShadowMinHeight, fakeShadowTranslationZ); 80 mFakeShadow.setTranslationZ(fakeShadowTranslationZ); 81 mFakeShadow.setTranslationX(outlineTranslation); 82 mFakeShadow.setTranslationY(shadowYEnd - mFakeShadow.getHeight()); 83 if (outlineAlpha != mOutlineAlpha) { 84 mOutlineAlpha = outlineAlpha; 85 mFakeShadow.invalidateOutline(); 86 } 87 } 88 } 89 } 90