Hello Brandon, Your comment is not correct for Win32 version. ROOT under Windows has several threads and each has its own event loop. (UNIX version has only event loop) For example Win32 and Qt flavors always create the internal GUI thread with the active event loop regardless of whether one calls the TApplication::Run method or not. What really makes sense is the "ROOT batch" mode. In "batch" mode ROOT doesn't create any real implementation of its GUI layer and by this reason no graphical images is created at all. In "batch" mode under Windows GUI thread (with its own internal GUI event loop) is NOT created regardless of TApplication::Run method calling. The UNIX application design assumed it can be used on machine with no X11 at all. However on Windows platform one can image any Windows OS with no Win32 layer present. This means there was no technical need to distinguish "GUI" and "non-GUI" environment, because the second case would have meant we intend to run ROOT under MS DOS system: Windows - Win32 = MS DOS. I understand the GDK flavor has eliminated one (redundant in fact) thread and by this reason the Eric's application behavior was changed. ---- Best regards Valeri > -----Original Message----- > From: Brandon Kohn [mailto:blk@maia-institute.org] > Sent: Thursday, January 08, 2004 6:15 AM > To: ANCIANT E.; 'Valeri Fine'; 'Rene Brun'; 'roottalk@root.cern.ch' > Subject: Re: [ROOT] > > Assuming that you are using the latest version of ROOT, the problem with > resizing (really refreshing the canvas) is due to the fact that you must > have the instance of the application running it's event loop. This is done > using TApplication::Run(); Try placing this at the end of your test program, > and see if you get resizing behavior then. > > Regards > Brandon > ----- Original Message ----- > From: "ANCIANT E." <eric_anciant@sodern.fr> > To: "'Valeri Fine'" <fine@bnl.gov>; "'Brandon Kohn'" > <blk@maia-institute.org>; "'Rene Brun'" <Rene.Brun@cern.ch>; > "'roottalk@root.cern.ch'" <roottalk@pcroot.cern.ch> > Sent: Thursday, January 08, 2004 11:11 AM > Subject: RE: [ROOT] > > > > Thanks a lot for the quick help, > > > > indeed, instanciating one TApplication solve my "pop-up" problem > > no need to have it run ( which is not what I was looking for since I use > > Root > > rather as a display facility .. ) > > > > however now I got an Error message : > > > > Error in <TWinNTSystem::BaseName>: name = 0 > > > > Besides, when I try to resize the window of my canvas (without the > > TApplication instance running), > > the content of the window (Canvas?, pads, histograms ..) don't get > resized. > > > > I don't know if it is linked to the error message. > > > > Or I guess I could wrap everything within the App and launch my > application > > through a button ? > > > > regards, > > > > eric > > > > > > > > > > > -----Message d'origine----- > > > De: Valeri Fine [SMTP:fine@bnl.gov] > > > Date: mercredi 7 janvier 2004 18:23 > > > À: 'Brandon Kohn'; 'ANCIANT E.'; 'roottalk@root.cern.ch' > > > Objet: RE: [ROOT] > > > > > > I think the reason for your troubles is the "gdk" version. > > > Did you say you did use very "gdk" in past? > > > > > No, it is the first time I try GDK ( before I was using root 3.02 > > with win32 ) > > > > >
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