[Lazarus] Blinks when clicks in a tab editor

[Mattias Gaertner]

On Mon, 10 Jun 2013 08:32:27 +0100
Graeme Geldenhuys <graeme at geldenhuys.co.uk> wrote:

> On 2013-06-09 20:31, Mattias Gaertner wrote:
> > 
> > I guess it happens only on some Window managers.
> 
> It happens here under stock Gnome 2 desktop environment, and under JWM
> (Joe's Window Manager).
> 
> What is even more strange is that if I have a few tabs open, say 8 tabs
> in the editor. The "white flash" occurs with every tab change, except
> when I go from the 5th tab back to the 4th tab. This is reproducible
> with 5+ tabs, even after a Lazarus IDE restart and even reproducible
> between window manager switches (eg: Gnome 2 DE -> JWM or back).
> 
> So what makes tabs 4 & 5 special? I can video this if you wanted to see.

I could see a blink of synedits right column on some page changes. It
is reproducible as long as the IDE is running. After a restart it was
gone.

I found a suspicious gtk2 draw call and disabled it.
Please test with 41658.

Mattias