个人代码库のC#可移动按钮“相关代码”

Technorati 标签: C#, 可移动代码, 按钮

        #region 可移动按钮“相关代码”



        Point mouse_offset;

        private void Button_MouseDown(object sender , MouseEventArgs e)

        {

            mouse_offset = e.Location; //将当前鼠标相对于“窗体”左上角的坐标赋值给mouse_offset

        }



        private void Button_MouseMove(object sender , MouseEventArgs e)

        {



            if ( e.Button == MouseButtons.Left )

            {

                //将相对屏幕坐标转换为相对工作区的坐标。

                int left = PointToClient(Control.MousePosition).X - mouse_offset.X;

                int top = PointToClient(Control.MousePosition).Y - mouse_offset.Y;

                

                //左右可能越界

                if(left<0)

                    left=0;

                if ( left > this.Width )

                    left = this.Width - ( (Button)sender ).Width;



                //上下可能越界

                if ( top < 0 )

                    top = 0;

                if ( top > this.Height )

                    top = this.Height - ( (Button)sender ).Height;



                

                ( (Button)sender ).Left = left;

                ( (Button)sender ).Top = top;

            }

        }



        #endregion