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
|
using System.ComponentModel;
using Android.Graphics.Drawables;
using Android.OS;
using Android.Widget;
namespace Xamarin.Forms.Platform.Android
{
public class SliderRenderer : ViewRenderer<Slider, SeekBar>, SeekBar.IOnSeekBarChangeListener
{
double _max;
double _min;
public SliderRenderer()
{
AutoPackage = false;
}
double Value
{
get { return _min + (_max - _min) * (Control.Progress / 1000.0); }
set { Control.Progress = (int)((value - _min) / (_max - _min) * 1000.0); }
}
void SeekBar.IOnSeekBarChangeListener.OnProgressChanged(SeekBar seekBar, int progress, bool fromUser)
{
((IElementController)Element).SetValueFromRenderer(Slider.ValueProperty, Value);
}
void SeekBar.IOnSeekBarChangeListener.OnStartTrackingTouch(SeekBar seekBar)
{
}
void SeekBar.IOnSeekBarChangeListener.OnStopTrackingTouch(SeekBar seekBar)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<Slider> e)
{
base.OnElementChanged(e);
if (e.OldElement == null)
{
var seekBar = new SeekBar(Context);
SetNativeControl(seekBar);
seekBar.Max = 1000;
seekBar.SetOnSeekBarChangeListener(this);
}
Slider slider = e.NewElement;
_min = slider.Minimum;
_max = slider.Maximum;
Value = slider.Value;
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
Slider view = Element;
switch (e.PropertyName)
{
case "Maximum":
_max = view.Maximum;
break;
case "Minimum":
_min = view.Minimum;
break;
case "Value":
if (Value != view.Value)
Value = view.Value;
break;
}
}
protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
base.OnLayout(changed, l, t, r, b);
BuildVersionCodes androidVersion = Build.VERSION.SdkInt;
if (androidVersion >= BuildVersionCodes.JellyBean)
{
// Thumb only supported JellyBean and higher
if (Control == null)
return;
SeekBar seekbar = Control;
Drawable thumb = seekbar.Thumb;
int thumbTop = seekbar.Height / 2 - thumb.IntrinsicHeight / 2;
thumb.SetBounds(thumb.Bounds.Left, thumbTop, thumb.Bounds.Left + thumb.IntrinsicWidth, thumbTop + thumb.IntrinsicHeight);
}
}
}
}
|
