随心所欲移动Panel

　　C# Winform编程时,有时需要在程序执行时,使窗体中的panel控件可以随意的移动,这时可以采用下面这种方法:

　　主要包括以下两步:

@1:给panel(此处以 RealGLPanel为例说明)添加MouseDown和MouseMove事件处理函数,如此处对应为: RealGLPanel_MouseMove

　　　　和 RealGLPanel_MouseDown

　　@2:编写两个函数的实现代码(真的不长,不要怕)

　　具体的代码实现如下:

 1         private void RealGLPanel_MouseDown(object sender, MouseEventArgs e)
 2         {
 3             oldRealGLPLPt.X = this.RealGLPanel.Location.X;
 4             oldRealGLPLPt.Y = this.RealGLPanel.Location.Y;
 5 
 6             RealGLPLPt.X = Cursor.Position.X;
 7             RealGLPLPt.Y = Cursor.Position.Y;
 8             this.RealGLPanel.BringToFront();
 9         }
10 
11         private void RealGLPanel_MouseMove(object sender, MouseEventArgs e)
12         {
13             if (e.Button == MouseButtons.Left)
14             {
15                 int tx, ty;                
16                 tx = Cursor.Position.X - RealGLPLPt.X;
17                 ty = Cursor.Position.Y - RealGLPLPt.Y;
18 
19                 if (tx != 0 || ty != 0)
20                 {
21                     int tempx = oldRealGLPLPt.X + tx;
22                     int tempy = oldRealGLPLPt.Y + ty;
23 
24                     //此处可以添加对tempx和tempy的限定的代码
25                     
26                     this.RealGLPanel.Location = new System.Drawing.Point(tempx, tempy);
27                 }
28                 this.RealGLPanel.BringToFront();
29             }
30         }