[C #]-custom controls (including source code)-rounded panel

Rounded panelCode

 

  Using  System;
  Using  System. Collections. Generic;
  Using  System. componentmodel;
  Using  System. diagnostics;
  Using  System. LINQ;
  Using System. text;

  Namespace  Mycontrollibrary
{
  Public     Partial     Class  Roundpanel: system. Windows. Forms. Panel
{
  Public  Roundpanel ()
{
Initializecomponent ();

  This  . Padding  =    New  System. Windows. Forms. Padding (  0  ,  0  ,  0  ,  0  );
  This  . Margin  =     New  System. Windows. Forms. Padding (  0 ,  0  ,  0  ,  0  );
  This  . Backgroundimagelayout  =  System. Windows. Forms. imagelayout. Stretch;
}


  //  Rounded corner
  //  ========================================================== ========================================================== ==================== 
    Private     Int  _ Radius;  //  Corner radian  
  
  ///     <Summary>  Rounded corner radians (0 indicates not rounded corner)  </Summary>  
  [Browsable ( True  )]
[Description (  "  Rounded corner radians (0 indicates not rounded corner)  "  )]
  Public     Int  _ Setroundradius
{
  Get  
{
  Return  _ Radius;
}
  Set  
{
 If  (Value  <     0  ) {_ Radius  =     0  ;}
  Else  {_ Radius  =  Value ;}
  Base  . Refresh ();
}
}


  // Rounded corner code  
    Public     Void  Round (system. Drawing. region Region)
{
  //  Bytes -----------------------------------------------------------------------------------------------
  //  It is already the easiest way to modify the form Attributes provided by. Net (You have to call the API yourself before)  
  System. Drawing. drawing2d. graphicspath opath  =    New  System. Drawing. drawing2d. graphicspath ();
  Int  X  =     0  ;
  Int  Y  =     0  ;
  Int  Thiswidth =     This  . Width;
  Int  Thisheight  =     This  . Height;
  Int  Angle  =  _ Radius;
  If  (Angle  >    0  )
{
System. Drawing. Graphics g  =  Creategraphics ();
Opath. addarc (X, Y, angle, angle,  180  ,  90  );  //  Upper left corner  
  Opath. addarc (thiswidth  - Angle, Y, angle, angle,  270  ,  90  );  //  Upper right corner  
  Opath. addarc (thiswidth  -  Angle, thisheight  -  Angle,  0  ,  90 );  //  Bottom right corner  
  Opath. addarc (x, thisheight  -  Angle,  90  ,  90  );  //  Lower left corner  
  Opath. closeallfigures ();
Region  =    New  System. Drawing. region (opath );
}
  //  Bytes -----------------------------------------------------------------------------------------------  
    Else  
{
Opath. addline (x  +  Angle, Y, thiswidth  -  Angle, y );  // Top  
  Opath. addline (thiswidth, y  +  Angle, thiswidth, thisheight  -  Angle );  //  Right side  
  Opath. addline (thiswidth  -  Angle, thisheight, X  +  Angle, thisheight ); //  Bottom edge  
  Opath. addline (X, Y  +  Angle, X, thisheight  -  Angle );  //  Left  
  Opath. closeallfigures ();
Region  =     New System. Drawing. region (opath );
}
}
  //  ========================================================== ========================================================== ====================  
  

  Public  Roundpanel (icontainer container)
{
Container. Add (  This  );

Initializecomponent ();
}

  Protected     Override    Void  Onpaint (system. Windows. Forms. painteventargs PE)
{
  Base  . Onpaint (PE );
Round (  This  . Region );  //  Rounded corner  
  }

  Protected     Override     Void Onresize (eventargs)
{
  Base  . Onresize (eventargs );
  Base  . Refresh ();
}
}
}