Create User Control based on Control class : Control : GUI Windows Forms C# Examples

    
using  System;
using  System.Drawing;
using  System.Drawing.Imaging;
using  System.Drawing.Drawing2D;
using  System.Windows.Forms;

public  class  SpriteTest  :  Form
{
        public  SpriteTest()
        {
                this.SuspendLayout();

                this.AutoScaleDimensions  =  new  System.Drawing.SizeF(6F,  13F);
                this.AutoScaleMode  =  System.Windows.Forms.AutoScaleMode.Font;
                this.ClientSize  =  new  System.Drawing.Size(295,  270);
                this.Text  =  "Sprite  Test";
                this.Load  +=  new  System.EventHandler(this.SpriteTest_Load);
                this.ResumeLayout(false);
        }

        private  bool  isDraggingA  =  false;
        private  bool  isDraggingB  =  false;

        private  EllipseShape  ellipseA,  ellipseB;

        private  void  SpriteTest_Load(object  sender,  EventArgs  e)
        {
                ellipseA  =  new  EllipseShape();
                ellipseA.Width  =  ellipseA.Height  =  100;
                ellipseA.Top  =  ellipseA.Left  =  30;
                ellipseA.BackColor  =  Color.Red;
                this.Controls.Add(ellipseA);

                ellipseB  =  new  EllipseShape();
                ellipseB.Width  =  ellipseB.Height  =  100;
                ellipseB.Top  =  ellipseB.Left  =  130;
                ellipseB.BackColor  =  Color.Azure;
                this.Controls.Add(ellipseB);

                ellipseA.MouseDown  +=  new  MouseEventHandler(Ellipse_MouseDown);
                ellipseA.MouseUp  +=  new  MouseEventHandler(Ellipse_MouseUp);
                ellipseA.MouseMove  +=  new  MouseEventHandler(Ellipse_MouseMove);

                ellipseB.MouseDown  +=  new  MouseEventHandler(Ellipse_MouseDown);
                ellipseB.MouseUp  +=  new  MouseEventHandler(Ellipse_MouseUp);
                ellipseB.MouseMove  +=  new  MouseEventHandler(Ellipse_MouseMove);
        }

        private  void  Ellipse_MouseDown(object  sender,  MouseEventArgs  e)
        {
                Control  control  =  (Control)sender;

                if  (e.Button  ==  MouseButtons.Left)
                {
                        control.Tag  =  new  Point(e.X,  e.Y);
                        if  (control  ==  ellipseA)
                        {
                                isDraggingA  =  true;
                        }
                        else
                        {
                                isDraggingB  =  true;
                        }
                }
        }

        private  void  Ellipse_MouseUp(object  sender,  MouseEventArgs  e)
        {
                isDraggingA  =  false;
                isDraggingB  =  false;
        }

        private  void  Ellipse_MouseMove(object  sender,  MouseEventArgs  e)
        {
                Control  control  =  (Control)sender;

                if  ((isDraggingA  &&  control  ==  ellipseA)  ||  (isDraggingB  &&  control  ==  ellipseB))
                {
                        Point  point  =  (Point)control.Tag;

                        control.Left  =  e.X  +  control.Left  -  point.X;
                        control.Top  =  e.Y  +  control.Top  -  point.Y;
                }
        }
        [STAThread]
        static  void  Main()
        {
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new  SpriteTest());
        }
        
}
class  EllipseShape  :  Control
{
        public  EllipseShape(){}

        private  GraphicsPath  path  =  null;

        private  void  RefreshPath()
        {
                path  =  new  GraphicsPath();
                path.AddEllipse(this.ClientRectangle);
                this.Region  =  new  Region(path);
        }

        protected  override  void  OnPaint(PaintEventArgs  e)
        {
                base.OnPaint(e);
                if  (path  !=  null)
                {
                        e.Graphics.SmoothingMode  =  SmoothingMode.AntiAlias;
                        e.Graphics.FillPath(new  SolidBrush(this.BackColor),  path);
                        e.Graphics.DrawPath(new  Pen(this.ForeColor,  1),  path);
                }
        }

        protected  override  void  OnResize(System.EventArgs  e)
        {
                base.OnResize(e);
                RefreshPath();
                this.Invalidate();
        }
}