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
|
package com.google.android.DemoKit;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
public class Slider extends View {
interface SliderPositionListener {
void onPositionChange(double value);
}
private Drawable mIndicator;
private Drawable mBackground;
private double mPosition;
private SliderPositionListener mListener;
private boolean mVertical;
public Slider(Context context) {
super(context);
initSliderView(context, false);
}
public Slider(Context context, AttributeSet attrs) {
super(context, attrs);
initSliderView(context, false);
}
public void setSliderBackground(Drawable background) {
mBackground = background;
invalidate();
}
public void setPositionListener(SliderPositionListener listener) {
mListener = listener;
}
public void setPosition(double position) {
if (mPosition != position) {
invalidate();
mPosition = position;
if (mListener != null) {
mListener.onPositionChange(mPosition);
}
}
}
private OnTouchListener mClickListener = new OnTouchListener() {
public boolean onTouch(View v, MotionEvent m) {
Rect r = new Rect();
getDrawingRect(r);
double position;
if (mVertical) {
double y = m.getY();
position = Math.max(0, (r.bottom - y) / r.height());
} else {
double x = m.getX();
position = Math.max(0, (x - r.left) / r.width());
}
position = Math.min(1, position);
setPosition(position);
return true;
}
};
protected void initSliderView(Context context, boolean vertical) {
mPosition = 0;
mVertical = vertical;
Resources res = context.getResources();
if (mVertical) {
mBackground = res
.getDrawable(R.drawable.scrubber_vertical_blue_holo_dark);
} else {
mBackground = res
.getDrawable(R.drawable.scrubber_horizontal_holo_dark);
}
mIndicator = res.getDrawable(R.drawable.scrubber_control_holo_dark);
this.setOnTouchListener(mClickListener);
}
protected void onDraw(Canvas canvas) {
Rect r = new Rect();
getDrawingRect(r);
if (mVertical) {
int lineX = r.centerX();
int bgW = mBackground.getIntrinsicWidth() / 2;
if (bgW == 0) {
bgW = 5;
}
mBackground.setBounds(lineX - bgW, r.top + 10, lineX + bgW,
r.bottom - 10);
mBackground.draw(canvas);
final int kMargin = 48;
int indicatorY = (int) (r.bottom - (r.height() - kMargin)
* mPosition)
- kMargin / 2;
Utilities.centerAround(lineX, indicatorY, mIndicator);
mIndicator.draw(canvas);
} else {
int lineY = r.centerY();
int bgH = mBackground.getIntrinsicHeight() / 2;
if (bgH == 0) {
bgH = 5;
}
mBackground.setBounds(r.left + 10, lineY - bgH, r.right - 10, lineY
+ bgH);
mBackground.draw(canvas);
final int kMargin = 48;
int indicatorX = (int) ((r.width() - kMargin) * mPosition) + r.left
+ kMargin / 2;
Utilities.centerAround(indicatorX, lineY, mIndicator);
mIndicator.draw(canvas);
}
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (mVertical) {
setMeasuredDimension(mIndicator.getIntrinsicWidth(),
getMeasuredHeight());
} else {
setMeasuredDimension(getMeasuredWidth(),
mIndicator.getIntrinsicHeight());
}
}
}
|
