Moving a shape with mouse

Moving a shape with mouse

• Lukasz Pietrzak

  Very Helpful...

  Thanks 30000
  

  
  
  

• praveen gupta

  http://www.codeproject.com/csharp/drawtools.asp
  

• WebMetro

  Howdy,

  This depends on the scenario you are in, but everything is possible.

  You need to override the OnPaintBackground method of your form or control and set comment out the base update statement. You should be overriding the OnPaint method at any rate, and its in here that you should be calling the Clear method from your graphics context. So an example might look like the following:

  protected override void OnPaintBackground(PaintEventArgs pevent)

  {

  //Don't allow the background to paint

  }

  protected override void OnPaint(PaintEventArgs e)

  {

  //Setup the new back buffers where _screenBackBufer is a Bitmap

  if (this._screenBackBuffer == null)

  this._screenBackBuffer = new Bitmap(this.ClientSize.Width, this.ClientSize.Height);

  //New empty buffers wher _screenGraphics is a graphic object

  this._screenGraphics = Graphics.FromImage(this._screenBackBuffer);

  //Set the background color of our form

  this._screenGraphics.Clear(this._formBackColor);

  this._screenGraphics.SmoothingMode = SmoothingMode.AntiAlias;

  //Are we in design time mode

  if (this.DesignMode)

  {

  //Clean up

  this._screenGraphics.Dispose();

  //Copy the back buffer to the screen

  e.Graphics.DrawImageUnscaled(this._screenBackBuffer, 0, 0);

  return;

  }

  try

  {

  //Draw everything now in this method

  this.DrawObjects();

  //Clean up

  this._screenGraphics.Dispose();

  //Copy the back buffer to the screen

  e.Graphics.DrawImageUnscaled(this._screenBackBuffer, 0, 0);

  }

  catch

  {

  //just incase

  this.Invalidate();

  }

  }

  Good luck with it..

  
  
  

• Nilushan

  it's an idea, as i'm new i'll try , the execution time is important i'll analyse.

  
  

  
  

  thanks X 20000
  

  
  
  
• Moving a shape with mouse