[Gambas-user] IconView bug on LXDE 0.5.11

[Willy Raets]

On Sat, 2013-04-06 at 01:12 +0200, Benoît Minisini wrote:
> Le 03/04/2013 17:05, Willy Raets a écrit :
> > On Mon, 2013-03-18 at 19:30 +0100, Willy Raets wrote:
> >> When running a Gambas application using gb.qt4 on Lubuntu 12.10 with
> >> LXDE 0.5.11 IconView shows black.
> >> Using gb.gui or gb.gtk poses no problems, IconView shows normal.
> >>
> >> Problem is ONLY with LXDE 0.5.11, previous version of Lubuntu 12.04 with
> >> LXDE 0.5.8 shows the IconView normal. So does LXDE 0.5.10 on a Fedora
> >> box. Tested Xubuntu 12.10 with Xfce 0.4.10 as well, no problem there.
> >>
> >> On LXDE 0.5.11 I tested with both Gambas 3.4 and Gambas 3.4 rev. #5582
> >>
> >> Attached a source code archive with an example.
> >>
> >> System specification of the Lubuntu 12.10 LXDE 0.5.10 (in VM) are:
> >> [System]
> >> OperatingSystem=Linux
> >> Kernel=3.5.0-25-generic
> >> Architecture=x86
> >> Distribution=Ubuntu 12.10
> >> Desktop=LXDE
> >> Theme=QGtk
> >> Language=en_US.UTF-8
> >> Memory=1003M
> >>
> >> [Libraries]
> >> GStreamer=libgstreamer-0.10.so.0.30.0
> >> GTK+=libgtk-x11-2.0.so.0.2400.13
> >> Poppler=libpoppler.so.28.0.0
> >> Qt4=libQtCore.so.4.8.3
> >> SDL=libSDL-1.2.so.0.11.4
> >>
> >> Note: A user on Lubuntu 12.10 discovered this problem in one of my
> >> applications and he wasn't running in VM, so it is not VM releated.
> >
> > This problem with IconView occured on Lubuntu 12.10 - LXDE 0.5.12 first.
> > Now recently I had a bug report from a guy who recently installed
> > Lubuntu 12.04 - LXDE 0.5.8 with the same problem -> IconView is blacked
> > out.
> >
> > Strangely enought I have two Lubuntu 12.04 - LXDE 0.5.8 installed where
> > the problem doesn't occur. They where installed 1/2 year ago and kept
> > updated.
> >
> > I have two recently installs of Lubuntu 12.04 - LXDE 0.5.8 on end user
> > systems where the problem occurs as well.
> >
> > So it seems all recent Lubuntu installs as of 12.04 have the problem
> > with the IconView.
> >
> > So I made a little IconView tester to test the troubled Lubuntu 12.10.
> > When running it with gb.qt4 IconView blacks out
> > When running it with gb.gtk IconView works as expected
> >
> > Next I tested on a troubled Lubuntu 12.04 to run the gtk version of
> > IconView and it works, the qt4 version doesn't.
> >
> > So the problem seems to be gb.qt4 related.
> > Themes on ALL Lubuntu systems is QGtk.(those working and those not
> > working with gb.gt4 IconViewTest)
> >
> > Tested with Gambas 3.4.0 and 3.4.0 both rev#5598 and rev#5608
> >
> > Attached:
> > - Screenshot with gb.gtk used on Lubuntu 12.10
> > - Screenshot with gb.qt4 used on Lubuntu 12.10
> > - Source Archive of IconViewTester
> >
> > Source Archive is set to gb.gtk (the working version)
> > Run once with gb.gtk next set to component gb.qt4 and run again to see
> > the difference.
> >
> > Note: All my Lubuntu 12.04 that have been installed over 1/2 a year ago
> > work with both versions
> > All recently installed Lubuntu 12.04 work with only gb.gtk version.
> >
> > If more information is needed just let me know.
> > The Lubuntu 12.10 specification are in previous post (see above).
> >
> > The application I have this problem in is using gb.qt4.webkit so it has
> > to use gb.qt4 (since there is no gb.gtk.webkit -> why not actually?)
> 
> Lack of time to do it...
> 
> > else I could simply solve my problem by switching to gb.gtk
> >
> > Thanks..
> >
> >
> 
> I can't reproduce the problem, but it must come from the theme. Which 
> GTK+ theme do you use on the system you get the black background, and on 
> the system you don't get it?
> 
ALL themes are the system defaults. 

On all my installations I leave default theme, never change it (except
for the Lubuntu 12.10 on your request)

Tried changing the theme on the Lubuntu 12.10 with the other default
available themes. But that doesn't change the problem and IDE always
says Theme=QGtk

System 1: Lubuntu 12.04 - LXDE 0.5.8 - Gambas 3.4.0 - QGtk (default)
System 2: Lubuntu 12.04 - LXDE 0.5.8 - Gambas 3.4.0 - QGtk (default)
System 3: Lubuntu 12.04 - LXDE 0.5.8 - Gambas 3.4.0 - QGtk (default)
System 4: Lubuntu 12.10 - LXDE 0.5.11 - Gambas 3.4.0 rev#5608 - QGtk
(default)
-> not working with gb.qt4
system 3 and 4 are in a VM
system 1 and 2 are located at my work (so out of reach now)

System 5: Lubuntu 12.04 - LXDE 0.5.8 - Gambas 3.3.4 - QGtk (default)
System 6: Lubuntu 12.04 - LXDE 0.5.8 - Gambas 3.4.0 - QGtk (default)
-> working with gb,qt4
system 5 and 6 are in a VM

Attached:
IconViewOK.png -> shows IDE System Information and 
working gb.qt4 IconView on system 6

IconViewNotOK.png -> shows IDE Sytem Information and
working gb.gtk and non working gb.qt4 IconView on system 4

Only difference I noticed is:
System 1 -> 4 are installed in the past month
System 5 -> 7 are installed before september 2012 (but kept updated)

I compared versions of several files in synaptic and they all are same
versions for all the Lubuntu 12.04 systems.

Did you try installing Lubuntu 12.04 or 12.10 in a VM to see if problem
occurs as it only happens on Lubuntu?


-- 
Kind regards,

Willy (aka gbWilly)

http://gambasshowcase.org/
http://howtogambas.org
http://gambos.org



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