1/*
2 * Copyright (C) 2015 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
17package com.android.systemui.statusbar.phone;
18
19import android.graphics.Canvas;
20import android.graphics.Point;
21import android.graphics.Rect;
22import android.graphics.drawable.Drawable;
23import android.view.View;
24import android.widget.ImageView;
25
26/** Creates a scaled-up version of an app icon for dragging. */
27class AppIconDragShadowBuilder extends View.DragShadowBuilder {
28    private final static int ICON_SCALE = 2;
29    final Drawable mDrawable;
30    final int mIconSize;  // Height and width in device-pixels.
31
32    public AppIconDragShadowBuilder(ImageView icon) {
33        mDrawable = icon.getDrawable();
34        // The Drawable may not be the same size as the ImageView, so use the ImageView size.
35        // The ImageView is not square because it has additional left and right padding to create
36        // a wider drop target, so use the height to create a square drag shadow.
37        mIconSize = icon.getHeight() * ICON_SCALE;
38    }
39
40    @Override
41    public void onProvideShadowMetrics(Point size, Point touch) {
42        size.set(mIconSize, mIconSize);
43        // Shift the drag shadow up slightly because the apps are at the bottom edge of the
44        // screen.
45        touch.set(mIconSize / 2, mIconSize * 2 / 3);
46    }
47
48    @Override
49    public void onDrawShadow(Canvas canvas) {
50        // The Drawable's native bounds may be different than the source ImageView. Force it
51        // to the correct size.
52        Rect oldBounds = mDrawable.copyBounds();
53        mDrawable.setBounds(0, 0, mIconSize, mIconSize);
54        mDrawable.draw(canvas);
55        mDrawable.setBounds(oldBounds);
56    }
57}
58