Winform Selection Rectangle & Other Controls

  • Thread starter Thread starter Erdem
  • Start date Start date
E

Erdem

Hi everyone

I am developing a custom control (inherit from control) that just draws
rectangle border.
Then i insert more than 50 instance of this control in a panel.

The thing i am trying to do is : to draw Selection Rectangle in panel. User
would be able to select instances of my custom controls in panel , which are
in selection rectangle.

The problem is;

While i am drawing selection rectangle, my custom controls (that are in
panel) blinks (they repaint themselves). There are also labels in panel but
they dont get repaint. this shows i am making a mistake with my custom
control paint event.

When i set -- >SetStyle(ControlStyles.Opaque, true); , blinking decreases
but this time control doesnt draw its background (because of style it is
meant to be :) ) so it is not usefull.

Any Suggestions ?

Thanks in advance

Erdem

this is my custom control's constructor and Paint event


public myPanel()
{
InitializeComponent();
SetStyle(ControlStyles.ContainerControl, false);
SetStyle(ControlStyles.DoubleBuffer,true);
SetStyle(ControlStyles.AllPaintingInWmPaint,false);
SetStyle(ControlStyles.ResizeRedraw,true);
SetStyle(ControlStyles.UserPaint,true);
SetStyle(ControlStyles.SupportsTransparentBackColor,true);



}

protected override void OnPaint(PaintEventArgs e)
{
Color borderColor = _borderDrawColor;
if (Selected)
borderColor = BorderSelectedColor;

Graphics g = e.Graphics;
ControlPaint.DrawBorder(
g,
new Rectangle(0, 0, this.Width, this.Height),
borderColor,
_borderWidth,
ButtonBorderStyle.Solid,
borderColor,
_borderWidth,
ButtonBorderStyle.Solid,
borderColor,
_borderWidth,
ButtonBorderStyle.Solid,
borderColor,
_borderWidth,
ButtonBorderStyle.Solid);

g.Dispose();

}
 
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