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
|
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media;
namespace Tango.Graphics2D
{
public class BindingEventContainer : DependencyObject
{
private DrawingVisual _visual;
private FrameworkElement _element;
public event EventHandler<BindingEventArgs> ValueChanged;
public Object Value
{
get { return (Object)GetValue(ValueProperty); }
set { SetValue(ValueProperty, value); }
}
public static readonly DependencyProperty ValueProperty =
DependencyProperty.Register("Value", typeof(Object), typeof(BindingEventContainer), new PropertyMetadata(null, (d, e) => (d as BindingEventContainer).OnValueChanged()));
public BindingEventContainer(DrawingVisual visual, FrameworkElement element)
{
_visual = visual;
_element = element;
}
private void OnValueChanged()
{
ValueChanged?.Invoke(this, new BindingEventArgs()
{
Element = _element,
Visual = _visual,
Value = Value,
});
}
public static BindingEventContainer Generate(DrawingVisual visual, FrameworkElement element, DependencyProperty elementProperty)
{
BindingEventContainer container = new BindingEventContainer(visual, element);
Binding binding = new Binding();
binding.Mode = BindingMode.OneWay;
binding.Source = element;
binding.Path = new PropertyPath(elementProperty);
BindingOperations.SetBinding(container, BindingEventContainer.ValueProperty, binding);
return container;
}
}
}
|
