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 */ 16 17 package com.android.systemui.statusbar; 18 19 import android.content.Context; 20 import android.graphics.Outline; 21 import android.graphics.Rect; 22 import android.graphics.RectF; 23 import android.util.AttributeSet; 24 import android.view.View; 25 import android.view.ViewOutlineProvider; 26 27 /** 28 * Like {@link ExpandableView}, but setting an outline for the height and clipping. 29 */ 30 public abstract class ExpandableOutlineView extends ExpandableView { 31 32 private final Rect mOutlineRect = new Rect(); 33 private boolean mCustomOutline; 34 private float mOutlineAlpha = -1f; 35 36 ViewOutlineProvider mProvider = new ViewOutlineProvider() { 37 @Override 38 public void getOutline(View view, Outline outline) { 39 int translation = (int) getTranslation(); 40 if (!mCustomOutline) { 41 outline.setRect(translation, 42 mClipTopAmount, 43 getWidth() + translation, 44 Math.max(getActualHeight(), mClipTopAmount)); 45 } else { 46 outline.setRect(mOutlineRect); 47 } 48 outline.setAlpha(mOutlineAlpha); 49 } 50 }; 51 ExpandableOutlineView(Context context, AttributeSet attrs)52 public ExpandableOutlineView(Context context, AttributeSet attrs) { 53 super(context, attrs); 54 setOutlineProvider(mProvider); 55 } 56 57 @Override setActualHeight(int actualHeight, boolean notifyListeners)58 public void setActualHeight(int actualHeight, boolean notifyListeners) { 59 super.setActualHeight(actualHeight, notifyListeners); 60 invalidateOutline(); 61 } 62 63 @Override setClipTopAmount(int clipTopAmount)64 public void setClipTopAmount(int clipTopAmount) { 65 super.setClipTopAmount(clipTopAmount); 66 invalidateOutline(); 67 } 68 setOutlineAlpha(float alpha)69 protected void setOutlineAlpha(float alpha) { 70 if (alpha != mOutlineAlpha) { 71 mOutlineAlpha = alpha; 72 invalidateOutline(); 73 } 74 } 75 76 @Override getOutlineAlpha()77 public float getOutlineAlpha() { 78 return mOutlineAlpha; 79 } 80 setOutlineRect(RectF rect)81 protected void setOutlineRect(RectF rect) { 82 if (rect != null) { 83 setOutlineRect(rect.left, rect.top, rect.right, rect.bottom); 84 } else { 85 mCustomOutline = false; 86 setClipToOutline(false); 87 invalidateOutline(); 88 } 89 } 90 91 @Override getOutlineTranslation()92 public int getOutlineTranslation() { 93 return mCustomOutline ? mOutlineRect.left : (int) getTranslation(); 94 } 95 updateOutline()96 public void updateOutline() { 97 if (mCustomOutline) { 98 return; 99 } 100 boolean hasOutline = true; 101 if (isChildInGroup()) { 102 hasOutline = isGroupExpanded() && !isGroupExpansionChanging(); 103 } else if (isSummaryWithChildren()) { 104 hasOutline = !isGroupExpanded() || isGroupExpansionChanging(); 105 } 106 setOutlineProvider(hasOutline ? mProvider : null); 107 } 108 isOutlineShowing()109 public boolean isOutlineShowing() { 110 ViewOutlineProvider op = getOutlineProvider(); 111 return op != null; 112 } 113 setOutlineRect(float left, float top, float right, float bottom)114 protected void setOutlineRect(float left, float top, float right, float bottom) { 115 mCustomOutline = true; 116 setClipToOutline(true); 117 118 mOutlineRect.set((int) left, (int) top, (int) right, (int) bottom); 119 120 // Outlines need to be at least 1 dp 121 mOutlineRect.bottom = (int) Math.max(top, mOutlineRect.bottom); 122 mOutlineRect.right = (int) Math.max(left, mOutlineRect.right); 123 124 invalidateOutline(); 125 } 126 127 } 128