1 /*
2  * Copyright (C) 2023 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.car.carlauncher;
18 
19 import android.graphics.Canvas;
20 import android.graphics.Point;
21 import android.graphics.drawable.Drawable;
22 import android.view.View;
23 
24 import androidx.annotation.NonNull;
25 
26 /**
27  * Custom View.DragShadowBuilder that handles the drawing and deploying of drag shadow when an
28  * app icon is long pressed and dragged.
29  */
30 public class AppItemDragShadowBuilder extends View.DragShadowBuilder{
31     private final Drawable mIcon;
32     private final int mScaledSize;
33     private final float mTouchPointX;
34     private final float mTouchPointY;
35 
36     /**
37      * @param icon Drawable to be drawn as the drag shadow to represent the view being dragged.
38      */
AppItemDragShadowBuilder(Drawable icon, float touchPointX, float touchPointY, int scaledSize)39     public AppItemDragShadowBuilder(Drawable icon, float touchPointX, float touchPointY,
40             int scaledSize) {
41         super();
42         mIcon = icon;
43         mScaledSize = scaledSize;
44         mTouchPointX = touchPointX;
45         mTouchPointY = touchPointY;
46     }
47 
48     @Override
onProvideShadowMetrics(Point outShadowSize, Point outShadowTouchPoint)49     public void onProvideShadowMetrics(Point outShadowSize, Point outShadowTouchPoint) {
50         outShadowSize.set(mScaledSize, mScaledSize);
51         outShadowTouchPoint.set((int) mTouchPointX, (int) mTouchPointY);
52     }
53 
54     @Override
onDrawShadow(@onNull Canvas canvas)55     public void onDrawShadow(@NonNull Canvas canvas) {
56         mIcon.setBounds(0, 0, mScaledSize, mScaledSize);
57         mIcon.draw(canvas);
58     }
59 }
60