[Lazarus] GroupBox AutoSize issues

Mattias Gaertner nc-gaertnma at netcologne.de
Tue Mar 17 17:46:01 CET 2015

On Tue, 17 Mar 2015 16:12:30 +0000
Henry Vermaak <henry.vermaak at gmail.com> wrote:

> Hi
> A while ago we managed to fix the GroupBox auto sizing not taking the
> length of the caption into account.  I've been using the fixes_1_2
> branch and that's working OK.
> I switched to fixes_1_4 and started seeing some strange behaviour.
> Initially it appears that the auto sizing works correctly (see
> groupbox1.png) but when you resize the window it changes and cuts the
> caption off (see groupbox2.png).  It doesn't resize again after that.
> This only happens when you've got some anchors set.
> Does anyone know what could have caused this?  If not I'll have to
> bisect, which I'd rather avoid!

The LCL gtk2 interface computed the preferred size of a groupbox
including the child controls, which lead to a loop.
We need another way to compute the size of a groupbox without the child


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