bug#5177: 23.1.90; scrollbar thumb stops working after being dragged

[Jan Djärv]

Ken Brown skrev:
> On 12/12/2009 11:41 AM, Angelo Graziosi wrote:
> > Il 12/12/2009 17.09, Ken Brown ha scritto:
> > > On 12/12/2009 7:29 AM, Jan Djärv wrote:
> > > > Angelo Graziosi skrev:
> > > > > Ken Brown ha scritto:
> > > > > > It would be helpful if a few people who have built emacs on other
> > > > > > systems could see if they can reproduce this bug. And if you could
> > > > > > report which version of Gtk+ you have, that might help narrow the
> > > > > > problem down.
> > > > >
> > > > > On Kubuntu-8.04 GTK+ is 2.12.9 and on Kubuntu-9.10 it is 2.18.3 (as
> > > > > on Cygwin). If it is a GTK+ problem, why other GTK+ applications do
> > > > > not show that behavior?
> > > > >
> > > > > ...and, it look to me that 23.1 (and the build I did with
> > > > > CVS-2009.11.14) work better. But perhaps I am wrong (a sort of
> > > > > illusion :-()
> > > >
> > > > Found the problem.
> > >
> > > That fixed it. Thanks.
> >
> > I still see an unexpected behavior: if I move the mouse pointer on the 
> > scrollbar thumb and click with mouse-1 (only a simple click, tic-tac), 
> > the thumb stops to follow the scrolling of the buffer I do with mouse 
> > wheel; if I re-click in the same manner, it works again. For the 
> > remainder, all works as expected.
>
> Yes, I can confirm that.  (I have to admit I would never have thought to 
> just click on the thumb without dragging it!)

Ah, it is a race condition.  I'll have to get back to you on this.

        Jan D.