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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/*
* 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.icons;
import static android.graphics.Paint.ANTI_ALIAS_FLAG;
import static android.graphics.Paint.FILTER_BITMAP_FLAG;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Rect;
import android.util.Log;
import android.view.ViewDebug;
/**
* Used to draw a notification dot on top of an icon.
*/
public class DotRenderer {
private static final String TAG = "DotRenderer";
// The dot size is defined as a percentage of the app icon size.
private static final float SIZE_PERCENTAGE = 0.38f;
// Extra scale down of the dot
private static final float DOT_SCALE = 0.6f;
// Offset the dot slightly away from the icon if there's space.
private static final float OFFSET_PERCENTAGE = 0.02f;
private final float mDotCenterOffset;
private final int mOffset;
private final float mCircleRadius;
private final Paint mCirclePaint = new Paint(ANTI_ALIAS_FLAG | FILTER_BITMAP_FLAG);
private final Bitmap mBackgroundWithShadow;
private final float mBitmapOffset;
public DotRenderer(int iconSizePx) {
mDotCenterOffset = SIZE_PERCENTAGE * iconSizePx;
mOffset = (int) (OFFSET_PERCENTAGE * iconSizePx);
int size = (int) (DOT_SCALE * mDotCenterOffset);
ShadowGenerator.Builder builder = new ShadowGenerator.Builder(Color.TRANSPARENT);
builder.ambientShadowAlpha = 88;
mBackgroundWithShadow = builder.setupBlurForSize(size).createPill(size, size);
mCircleRadius = builder.radius;
mBitmapOffset = -mBackgroundWithShadow.getHeight() * 0.5f; // Same as width.
}
/**
* Draw a circle on top of the canvas according to the given params.
*/
public void draw(Canvas canvas, DrawParams params) {
if (params == null) {
Log.e(TAG, "Invalid null argument(s) passed in call to draw.");
return;
}
canvas.save();
// We draw the dot relative to its center.
float dotCenterX = params.leftAlign
? params.iconBounds.left + mDotCenterOffset / 2
: params.iconBounds.right - mDotCenterOffset / 2;
float dotCenterY = params.iconBounds.top + mDotCenterOffset / 2;
int offsetX = Math.min(mOffset, params.spaceForOffset.x);
int offsetY = Math.min(mOffset, params.spaceForOffset.y);
canvas.translate(dotCenterX + offsetX, dotCenterY - offsetY);
canvas.scale(params.scale, params.scale);
mCirclePaint.setColor(Color.BLACK);
canvas.drawBitmap(mBackgroundWithShadow, mBitmapOffset, mBitmapOffset, mCirclePaint);
mCirclePaint.setColor(params.color);
canvas.drawCircle(0, 0, mCircleRadius, mCirclePaint);
canvas.restore();
}
public static class DrawParams {
/** The color (possibly based on the icon) to use for the dot. */
@ViewDebug.ExportedProperty(category = "notification dot", formatToHexString = true)
public int color;
/** The bounds of the icon that the dot is drawn on top of. */
@ViewDebug.ExportedProperty(category = "notification dot")
public Rect iconBounds = new Rect();
/** The progress of the animation, from 0 to 1. */
@ViewDebug.ExportedProperty(category = "notification dot")
public float scale;
/** Overrides internally calculated offset if specified value is smaller. */
@ViewDebug.ExportedProperty(category = "notification dot")
public Point spaceForOffset = new Point();
/** Whether the dot should align to the top left of the icon rather than the top right. */
@ViewDebug.ExportedProperty(category = "notification dot")
public boolean leftAlign;
}
}
|
