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 
ExpandableOutlineView(Context context, AttributeSet attrs)35     public ExpandableOutlineView(Context context, AttributeSet attrs) {
36         super(context, attrs);
37         setOutlineProvider(new ViewOutlineProvider() {
38             @Override
39             public void getOutline(View view, Outline outline) {
40                 if (!mCustomOutline) {
41                     outline.setRect(0,
42                             mClipTopAmount,
43                             getWidth(),
44                             Math.max(getActualHeight(), mClipTopAmount));
45                 } else {
46                     outline.setRect(mOutlineRect);
47                 }
48             }
49         });
50     }
51 
52     @Override
setActualHeight(int actualHeight, boolean notifyListeners)53     public void setActualHeight(int actualHeight, boolean notifyListeners) {
54         super.setActualHeight(actualHeight, notifyListeners);
55         invalidateOutline();
56     }
57 
58     @Override
setClipTopAmount(int clipTopAmount)59     public void setClipTopAmount(int clipTopAmount) {
60         super.setClipTopAmount(clipTopAmount);
61         invalidateOutline();
62     }
63 
setOutlineRect(RectF rect)64     protected void setOutlineRect(RectF rect) {
65         if (rect != null) {
66             setOutlineRect(rect.left, rect.top, rect.right, rect.bottom);
67         } else {
68             mCustomOutline = false;
69             invalidateOutline();
70         }
71     }
72 
setOutlineRect(float left, float top, float right, float bottom)73     protected void setOutlineRect(float left, float top, float right, float bottom) {
74         mCustomOutline = true;
75 
76         mOutlineRect.set((int) left, (int) top, (int) right, (int) bottom);
77 
78         // Outlines need to be at least 1 dp
79         mOutlineRect.bottom = (int) Math.max(top, mOutlineRect.bottom);
80         mOutlineRect.right = (int) Math.max(left, mOutlineRect.right);
81 
82         invalidateOutline();
83     }
84 
85 }
86