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
141
|
/*
This file is part of Subsonic.
Subsonic is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Subsonic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
Copyright 2009 (C) Sindre Mehus
*/
package github.daneren2005.subphonic.util;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ProgressBar;
import github.daneren2005.subphonic.R;
/**
* @author Sindre Mehus
* @version $Id$
*/
public class HorizontalSlider extends ProgressBar {
private final Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.slider_knob);
private boolean slidingEnabled;
private OnSliderChangeListener listener;
private static final int PADDING = 2;
private boolean sliding;
private int sliderPosition;
private int startPosition;
public interface OnSliderChangeListener {
void onSliderChanged(View view, int position, boolean inProgress);
}
public HorizontalSlider(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public HorizontalSlider(Context context, AttributeSet attrs) {
super(context, attrs, android.R.attr.progressBarStyleHorizontal);
}
public HorizontalSlider(Context context) {
super(context);
}
public void setSlidingEnabled(boolean slidingEnabled) {
if (this.slidingEnabled != slidingEnabled) {
this.slidingEnabled = slidingEnabled;
invalidate();
}
}
public boolean isSlidingEnabled() {
return slidingEnabled;
}
public void setOnSliderChangeListener(OnSliderChangeListener listener) {
this.listener = listener;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int max = getMax();
if (!slidingEnabled || max == 0) {
return;
}
int paddingLeft = getPaddingLeft();
int paddingRight = getPaddingRight();
int paddingTop = getPaddingTop();
int paddingBottom = getPaddingBottom();
int w = getWidth() - paddingLeft - paddingRight;
int h = getHeight() - paddingTop - paddingBottom;
int position = sliding ? sliderPosition : getProgress();
int bitmapWidth = bitmap.getWidth();
int bitmapHeight = bitmap.getWidth();
float x = paddingLeft + w * ((float) position / max) - bitmapWidth / 2.0F;
x = Math.max(x, paddingLeft);
x = Math.min(x, paddingLeft + w - bitmapWidth);
float y = paddingTop + h / 2.0F - bitmapHeight / 2.0F;
canvas.drawBitmap(bitmap, x, y, null);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!slidingEnabled) {
return false;
}
int action = event.getAction();
if (action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_MOVE) {
if (action == MotionEvent.ACTION_DOWN) {
sliding = true;
startPosition = getProgress();
}
float x = event.getX() - PADDING;
float width = getWidth() - 2 * PADDING;
sliderPosition = Math.round((float) getMax() * (x / width));
sliderPosition = Math.max(sliderPosition, 0);
setProgress(Math.min(startPosition, sliderPosition));
setSecondaryProgress(Math.max(startPosition, sliderPosition));
if (listener != null) {
listener.onSliderChanged(this, sliderPosition, true);
}
} else if (action == MotionEvent.ACTION_UP) {
sliding = false;
setProgress(sliderPosition);
setSecondaryProgress(0);
if (listener != null) {
listener.onSliderChanged(this, sliderPosition, false);
}
}
return true;
}
}
|