1 /*
2  * Copyright 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 
17 package com.android.quickstep.views;
18 
19 import android.content.Context;
20 import android.graphics.Canvas;
21 import android.graphics.Paint;
22 import android.graphics.Rect;
23 import android.graphics.drawable.Drawable;
24 import android.util.AttributeSet;
25 import android.util.TypedValue;
26 import android.widget.FrameLayout;
27 
28 import androidx.annotation.Nullable;
29 
30 public class SplitPlaceholderView extends FrameLayout {
31 
32     private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
33     private final Rect mTempRect = new Rect();
34 
35     @Nullable
36     private IconView mIconView;
37 
SplitPlaceholderView(Context context, AttributeSet attrs)38     public SplitPlaceholderView(Context context, AttributeSet attrs) {
39         super(context, attrs);
40 
41         mPaint.setColor(getThemeBackgroundColor(context));
42         setWillNotDraw(false);
43     }
44 
45     @Override
dispatchDraw(Canvas canvas)46     protected void dispatchDraw(Canvas canvas) {
47         // Call this before super call to draw below the children.
48         drawBackground(canvas);
49 
50         super.dispatchDraw(canvas);
51 
52         if (mIconView != null) {
53             // Center the icon view in the visible area.
54             getLocalVisibleRect(mTempRect);
55             FloatingTaskView parent = (FloatingTaskView) getParent();
56             parent.centerIconView(mIconView, mTempRect.centerX(), mTempRect.centerY());
57         }
58     }
59 
60     @Nullable
getIconView()61     public IconView getIconView() {
62         return mIconView;
63     }
64 
setIcon(Drawable drawable, int iconSize)65     public void setIcon(Drawable drawable, int iconSize) {
66         if (mIconView == null) {
67             mIconView = new IconView(getContext());
68             addView(mIconView);
69         }
70         mIconView.setDrawable(drawable);
71         mIconView.setDrawableSize(iconSize, iconSize);
72         FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(iconSize, iconSize);
73         mIconView.setLayoutParams(params);
74     }
75 
drawBackground(Canvas canvas)76     private void drawBackground(Canvas canvas) {
77         FloatingTaskView parent = (FloatingTaskView) getParent();
78         parent.drawRoundedRect(canvas, mPaint);
79     }
80 
getThemeBackgroundColor(Context context)81     private static int getThemeBackgroundColor(Context context) {
82         final TypedValue value = new TypedValue();
83         context.getTheme().resolveAttribute(android.R.attr.colorBackground, value, true);
84         return value.data;
85     }
86 }
87