1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher3.widget;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.view.View;
import com.android.launcher3.graphics.HolographicOutlineHelper;
import com.android.launcher3.Launcher;
import com.android.launcher3.PendingAddItemInfo;
import com.android.launcher3.Workspace;
import com.android.launcher3.graphics.DragPreviewProvider;
/**
* Extension of {@link DragPreviewProvider} with logic specific to pending widgets/shortcuts
* dragged from the widget tray.
*/
public class PendingItemPreviewProvider extends DragPreviewProvider {
private final PendingAddItemInfo mAddInfo;
private final Bitmap mPreviewBitmap;
public PendingItemPreviewProvider(View view, PendingAddItemInfo addInfo, Bitmap preview) {
super(view);
mAddInfo = addInfo;
mPreviewBitmap = preview;
}
@Override
public Bitmap createDragOutline(Canvas canvas) {
Workspace workspace = Launcher.getLauncher(mView.getContext()).getWorkspace();
int[] size = workspace.estimateItemSize(mAddInfo, false);
int w = size[0];
int h = size[1];
final Bitmap b = Bitmap.createBitmap(w, h, Bitmap.Config.ALPHA_8);
canvas.setBitmap(b);
Rect src = new Rect(0, 0, mPreviewBitmap.getWidth(), mPreviewBitmap.getHeight());
float scaleFactor = Math.min((w - DRAG_BITMAP_PADDING) / (float) mPreviewBitmap.getWidth(),
(h - DRAG_BITMAP_PADDING) / (float) mPreviewBitmap.getHeight());
int scaledWidth = (int) (scaleFactor * mPreviewBitmap.getWidth());
int scaledHeight = (int) (scaleFactor * mPreviewBitmap.getHeight());
Rect dst = new Rect(0, 0, scaledWidth, scaledHeight);
// center the image
dst.offset((w - scaledWidth) / 2, (h - scaledHeight) / 2);
canvas.drawBitmap(mPreviewBitmap, src, dst, null);
// Don't clip alpha values for the drag outline if we're using the default widget preview
boolean clipAlpha = !(mAddInfo instanceof PendingAddWidgetInfo &&
(((PendingAddWidgetInfo) mAddInfo).previewImage == 0));
HolographicOutlineHelper.getInstance(mView.getContext())
.applyExpensiveOutlineWithBlur(b, canvas, clipAlpha);
canvas.setBitmap(null);
return b;
}
}
|
