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:

        private void RealGLPanel_MouseDown(object sender, MouseEventArgs e)
        {
            oldRealGLPLPt.X = this.RealGLPanel.Location.X;
            oldRealGLPLPt.Y = this.RealGLPanel.Location.Y;

            RealGLPLPt.X = Cursor.Position.X;
            RealGLPLPt.Y = Cursor.Position.Y;
            this.RealGLPanel.BringToFront();
        }

        private void RealGLPanel_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                int tx, ty;                
                tx = Cursor.Position.X - RealGLPLPt.X;
                ty = Cursor.Position.Y - RealGLPLPt.Y;

                if (tx != 0 || ty != 0)
                {
                    int tempx = oldRealGLPLPt.X + tx;
                    int tempy = oldRealGLPLPt.Y + ty;

                    //此处可以添加对tempx和tempy的限定的代码
                    
                    this.RealGLPanel.Location = new System.Drawing.Point(tempx, tempy);
                }
                this.RealGLPanel.BringToFront();
            }
        }