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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* Copyright (C) 2010 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.browser;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.widget.ImageButton;
/**
*
*/
public class CircularProgressView extends ImageButton {
private static final int[] ALPHAS = {
64, 96, 128, 160, 192, 192, 160, 128, 96, 64
};
// 100 ms delay between frames, 10fps
private static int ALPHA_REFRESH_DELAY = 100;
private int mEndAngle;
private int mProgress;
private Paint mPaint;
private int mAlpha;
private boolean mAnimated;
private RectF mRect;
private int mMaxProgress;
/**
* @param context
* @param attrs
* @param defStyle
*/
public CircularProgressView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
/**
* @param context
* @param attrs
*/
public CircularProgressView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
/**
* @param context
*/
public CircularProgressView(Context context) {
super(context);
init(context);
}
private void init(Context ctx) {
mEndAngle = 0;
mProgress = 0;
mMaxProgress = 100;
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setColor(Color.BLACK);
mRect = new RectF();
}
void setMaxProgress(int max) {
mMaxProgress = max;
}
private synchronized boolean isAnimated() {
return mAnimated;
}
private synchronized void setAnimated(boolean animated) {
mAnimated = animated;
}
void setProgress(int progress) {
mProgress = progress;
mEndAngle = 360 * progress / mMaxProgress;
invalidate();
if (!isAnimated() && (progress > 0) && (progress < mMaxProgress)) {
setAnimated(true);
mAlpha = 0;
post(new Runnable() {
@Override
public void run() {
if (isAnimated()) {
mAlpha = (mAlpha + 1) % ALPHAS.length;
mPaint.setAlpha(ALPHAS[mAlpha]);
invalidate();
postDelayed(this, ALPHA_REFRESH_DELAY);
}
}
});
} else if ((progress <= 0) || (progress >= mMaxProgress)) {
setAnimated(false);
}
}
@Override
public void onDraw(Canvas canvas) {
int w = getWidth();
int h = getHeight();
float cx = w * 0.5f;
float cy = h * 0.5f;
mRect.set(0, 0, w, h);
if ((mProgress > 0) && (mProgress < mMaxProgress)) {
Path p = new Path();
p.moveTo(cx, cy);
p.lineTo(cx, 0);
p.arcTo(mRect, 270, mEndAngle);
p.lineTo(cx, cy);
int state = canvas.save();
canvas.drawPath(p, mPaint);
canvas.restoreToCount(state);
}
super.onDraw(canvas);
}
}
|
