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
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/*
* Copyright (C) 2017 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.graphics;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Outline;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
public class FastScrollThumbDrawable extends Drawable {
private static final Matrix sMatrix = new Matrix();
private final Path mPath = new Path();
private final Paint mPaint;
private final boolean mIsRtl;
public FastScrollThumbDrawable(Paint paint, boolean isRtl) {
mPaint = paint;
mIsRtl = isRtl;
}
@Override
public void getOutline(Outline outline) {
if (mPath.isConvex()) {
outline.setConvexPath(mPath);
}
}
@Override
protected void onBoundsChange(Rect bounds) {
mPath.reset();
float r = bounds.height() * 0.5f;
// The path represents a rotate tear-drop shape, with radius of one corner is 1/5th of the
// other 3 corners.
float diameter = 2 * r;
float r2 = r / 5;
mPath.addRoundRect(bounds.left, bounds.top, bounds.left + diameter, bounds.top + diameter,
new float[] {r, r, r, r, r2, r2, r, r},
Path.Direction.CCW);
sMatrix.setRotate(-45, bounds.left + r, bounds.top + r);
if (mIsRtl) {
sMatrix.postTranslate(bounds.width(), 0);
sMatrix.postScale(-1, 1, bounds.width(), 0);
}
mPath.transform(sMatrix);
}
@Override
public void draw(Canvas canvas) {
canvas.drawPath(mPath, mPaint);
}
@Override
public void setAlpha(int i) {
// Not supported
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
// Not supported
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
}
|
