Silverlight UI拖拽相关....

说明：该类库只能应用到同类对象上面，因为拖拽事件里牵扯到类型转换问题，很难做到通用，所以我只做了一类的例子。我正在寻找更加优化的解决方案，如果你有更好的方法，请留言！

 

1. 拖拽类库（直接使用该类就行）

using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Net; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Controls; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Documents; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Ink; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Input; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Media; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Media.Animation; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Shapes; namespace MouseDemo { /// <summary> /// 用于拖拽图元对象的类库 /// </summary> public class DragLibrary { private Rectangle m_MyRect; //图元区域 bool isMouseDown; //判断图元是否选中 double PointY; //Y轴刻度 double PointX; //X轴刻度 //相关构造<a href="/tag/hanshu/" target="_blank" class="keywords">函数</a> public DragLibrary() { } public DragLibrary(Rectangle myRect) { m_MyRect = myRect; m_MyRect.MouseLeftButtonDown += new MouseButtonEventHandler(Handle_MouseDown); m_MyRect.MouseMove += new MouseEventHandler(Handle_MouseMove); m_MyRect.MouseLeftButtonUp += new MouseButtonEventHandler(Handle_MouseUp); } //鼠标按下处理事件 public void Handle_MouseDown(object sender,MouseEventArgs args) { PointY = args.GetPosition(null).Y; PointX = args.GetPosition(null).X; isMouseDown = true; m_MyRect.CaptureMouse(); } //鼠标移动处理事件 public void Handle_MouseMove(object sender,MouseEventArgs args) { if (isMouseDown) { // Cal<a href="/tag/cula/" target="_blank" class="keywords">cula</a>te the current position of the object. double deltaV = args.GetPosition(null).Y - PointY; double deltaH = args.GetPosition(null).X - PointX; double newTop = deltaV + (double)m_MyRect.GetValue(Canvas.TopProperty); double newLeft = deltaH + (double)m_MyRect.GetValue(Canvas.LeftProperty); // Set new position of object. m_MyRect.SetValue(Canvas.TopProperty,newTop); m_MyRect.SetValue(Canvas.LeftProperty,newLeft); // Update position global variables. PointY = args.GetPosition(null).Y; PointX = args.GetPosition(null).X; } } //鼠标释放处理事件 public void Handle_MouseUp(object sender,MouseEventArgs args) { isMouseDown = false; m_MyRect.ReleaseMouseCapture(); PointY = -1; PointX = -1; } } }   

2. 使用方法：

 

//只需要将XAML页面要拖拽的Rectangle对象作为参数传递给该类就行。

DragLibrary drag = new DragLibrary(rect);