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GDI - Draw On TOP Of Controls

Posted on 2004-08-20
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Medium Priority
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Last Modified: 2008-02-01
Hi .. Everything I want to do is to draw a thin Line around the border of a control (when it is activated).

I can draw something with:
                  System.Drawing.Rectangle clientRect = this.ActiveControl.ClientRectangle;
                  System.Drawing.Pen dP = new System.Drawing.Pen(Color.Red,15);
                  System.Drawing.Graphics gdiSurface = this.ActiveControl.CreateGraphics();
                  gdiSurface.DrawRectangle(dP, clientRect);

but it will always paint where I do not want it to :)

is there a possibility to paint on top of the controls .. say .. around the border of a textbox
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Question by:somnatic
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4 Comments
 
LVL 5

Expert Comment

by:AdrianJMartin
ID: 11850728
the border is drawn on the control's surface if you want to draw arround that then you need to draw on the controls container......
0
 
LVL 4

Author Comment

by:somnatic
ID: 11850840
then say I want to redraw a border in another color ...
how would I do that ?
0
 
LVL 5

Accepted Solution

by:
AdrianJMartin earned 2000 total points
ID: 11850961
Ahh the border is actually part of the the control....

Add a handler to the buttons paint event, something like:-

private void button2_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
      Rectangle r = new Rectangle( new Point(0,0) , new Size( button2.Width -1, button2.Height -1 ) );
      Graphics g = e.Graphics;
      g.DrawRectangle( Pens.Red , r );  // Don't call Dispose on g -- you didn't create it!!!!!

}

you may need to alter the width of the pen to hide the existing border, or alter the FlatStyle property.......
0
 
LVL 4

Author Comment

by:somnatic
ID: 11850996
yep .. that did the trick :)
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