silverlight 2 事件变化

在silverlight2中，事件的处理发生了些变化，类似button，togglebutton等控件的MouSELEftButtonDown，MouSELEftButtonUp等事件已经在类的级别设置为已处理，因此这些类的实例不会再响应这两个事件，当然我们有时候依然要用到这两个事件，解决的@L_618_1@也很简单。我们需要重载这些类的OnMouSELEftButtonDown和OnMouSELEftButtonUp@L_618_1@来设置已处理的标志为未处理就可以了。

1. public class ActivityControl : Button
2.     {
3.         private bool _isMouseDown = false;
4.         private Point _oldPoint;
6.         public ActivityType ActivityType { get; set; }
8.         public ActivityControl()
9.         {
10.             this.MouSELEftButtonDown += new MouseButtonEventHandler(ActivityControl_MouSELEftButtonDown);
11.             this.MouSELEftButtonUp += new MouseButtonEventHandler(ActivityControl_MouSELEftButtonUp);
12.             this.MouseMove += new MouseEventHandler(ActivityControl_MouseMovE);
13.         }
15.         protected override void OnMouSELEftButtonDown(MouseButtonEventArgs E)
16.         {
17.             base.onMouSELEftButtonDown(E);
18.             e.Handled = false;
19.         }
21.         protected override void OnMouSELEftButtonUp(MouseButtonEventArgs E)
22.         {
23.             base.onMouSELEftButtonUp(E);
24.             e.Handled = false;
25.         }
27.         void ActivityControl_MouseMove(object sender, MouseEventArgs E)
28.         {
29.             if (_isMouseDown)
30.             {
31.                 Point p = e.GetPosition(null);
32.                 this.SETVALue(Canvas.LeftProperty, p.X - _oldPoint.X + (double)this.GetValue(Canvas.LeftProperty));
33.                 this.SETVALue(Canvas.TopProperty, p.Y - _oldPoint.Y + (double)this.GetValue(Canvas.TopProperty));
34.                 _oldPoint = p;
35.             }
36.         }
38.         void ActivityControl_MouSELEftButtonUp(object sender, MouseButtonEventArgs E)
39.         {
40.             if (_isMouseDown)
41.             {
42.                 _isMouseDown = false;
43.                 this.ReleaseMouseCapture();
44.             }
45.         }
47.         void ActivityControl_MouSELEftButtonDown(object sender, MouseButtonEventArgs E)
48.         {
49.             _isMouseDown = true;
50.             _oldPoint = e.GetPosition(null);
51.             this.CaptureMouse();
52.         }

我们只需要简单加上@H_173_403@@H_505_404@e.Handled = false;这句代码就可激活这两个事件了。@H_173_403@

@H_505_404@silverlight2之所以有这个变化是为了和WPF保持一致。@H_173_403@