[Lazarus] Custom control with stepwise size adjustment

gabor gabor at poczta.onet.pl
Wed Sep 19 14:29:16 CEST 2018

How to properly create a control with step-size adjustment? I mean a 
control whose width is a multiple of, eg. 16 (16,32,48...).
In delphi, I simply override TCustomControl.SetBounds method.

procedure TMyControl.SetBounds(aTop, aLeft, aWidth, aHeight: Integer);
   aWidth := (aWidth div 16) * 16;
   if aWidth = 0 then
     aWidth := 16;
   aHeight := (aHeight div 16) * 16;
   if aHeight = 0 then
     aHeight := 16;
   inherited SetBounds(aTop, aLeft, aWidth, aHeight);

Unfortunately, the same does not work well with LCL. Especially in 
connection with Anchors or in form designer.
So how to deal with it?

Regards, MichaƂ.

More information about the Lazarus mailing list