/
RangeSliderTrackLayer.cs
59 lines (44 loc) · 1.46 KB
/
RangeSliderTrackLayer.cs
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
using System;
using UIKit;
using CoreGraphics;
using CoreAnimation;
namespace sliderDemo
{
class RangeSliderTrackLayer : CALayer
{
public override void DrawInContext (CGContext ctx)
{
base.DrawInContext (ctx);
// clip
var cornerRadius = Bounds.Height / 2.0f;
UIBezierPath switchOutline = UIBezierPath.FromRoundedRect( (CGRect)Bounds, (nfloat)cornerRadius);
ctx.AddPath (switchOutline.CGPath);
ctx.Clip ();
// 1) fill the track
ctx.SetFillColor (UIColor.Green.CGColor);
ctx.AddPath(switchOutline.CGPath);
ctx.FillPath ();
// 2) fill the highlighed range //Skipped for demo
// 3) add a highlight over the track
CGRect highlight = new CGRect(cornerRadius/2, Bounds.Height/2,
Bounds.Width - cornerRadius, Bounds.Height/2);
UIBezierPath highlightPath = UIBezierPath.FromRoundedRect ((CGRect)highlight, (nfloat)highlight.Height / 2.0f);
ctx.AddPath(highlightPath.CGPath);
ctx.SetFillColor( UIColor.FromWhiteAlpha((nfloat)1.0f, (nfloat)0.4f).CGColor);
ctx.FillPath ();
// 4) inner shadow
ctx.SetShadow( new CGSize(0f, 2.0f), 3.0f, UIColor.Gray.CGColor);
ctx.AddPath (switchOutline.CGPath);
ctx.SetStrokeColor(UIColor.Gray.CGColor);
ctx.StrokePath ();
// 5) outline the track
ctx.AddPath( switchOutline.CGPath);
ctx.SetStrokeColor(UIColor.Black.CGColor);
ctx.SetLineWidth ((nfloat)0.5f);
ctx.StrokePath ();
//
// ctx.SetFillColor (UIColor.Blue.CGColor);
// ctx.FillRect (Bounds);
}
}
}