[vtkusers] QVTK resizing on Windows XP

Mon Nov 30 14:47:49 EST 2009

Hello Clint,

I will do tests with Paraview tomorrow and report the results to you. I did not use Paraview for a while, but I cannot remember comparable problems with it.

lars

-------- Original-Nachricht --------
> Datum: Mon, 30 Nov 2009 12:13:05 -0700
> Von: Clinton Stimpson <clinton at elemtech.com>
> An: vtkusers at vtk.org
> Betreff: Re: [vtkusers] QVTK resizing on Windows XP

> 
> Oh, then maybe the saveImageToCache() is causing an extra render that is 
> "solving" you problem.  Do you see the same problem in an application like
> paraview, which uses splitters too?
> 
> Clint
> 
> On Monday 30 November 2009 12:07:35 pm Lars Friedrich Lars wrote:
> > No, I do not call setAutomaticImageCacheEnabled(true) in my application;
> > this features is deactivated. Some cross-platform experiments in the
> past
> > with this flag set to TRUE showed me that it does not reliably work in
> 100%
> > of the cases - as you confirmed below. I just call the related methods
> > after resizing the widget as explained in the previous mail. My
> application
> > is basically built as standalone application and - on demand (on windows
> > systems) - with an additional shared lib interface. The described
> > workaround works on windows Vista / XP / 2000 for the standalone version
> > and the shared lib interface; it also works on Ubuntu 64 bit.
> >
> > lars
> >
> >
> > -------- Original-Nachricht --------
> >
> > > Datum: Mon, 30 Nov 2009 08:21:04 -0700
> > > Von: Clinton Stimpson <clinton at elemtech.com>
> > > An: vtkusers at vtk.org
> > > Betreff: Re: [vtkusers] QVTK resizing on Windows XP
> > >
> > >
> > > Are you calling setAutomaticImageCacheEnabled(true) to enable image
> > > caching with it?
> > > Maybe you should avoid doing this.
> > > I don't know if its been found to be useful in practice as it was once
> > > tried in ParaView but it didn't work too well.  Whether one has
> problems
> > > with it is dependent on the windowing system.
> > >
> > > Personally, I think the problem QVTKWidget's image caching tries to
> > > solve, is best solved by the windowing system.  Mac OSX and some Linux
> > > desktops already do it.
> > >
> > > Clint
> > >
> > > On 11/30/2009 08:04 AM, Lars Friedrich Lars wrote:
> > > > Hello,
> > > >
> > > > I just would like to report a solution to the problem outlined in
> the
> > >
> > > previous mail:
> > > > It seems to be a pure QVTKWidget problem; after resizing the
> QVTKWidget
> > >
> > > invoking the following code-cascade works to successfully render the
> > >
> > > complete viewport:
> > > > qvtk->markCachedImageAsDirty();
> > > > qvtk->saveImageToCache();
> > > > qvtk->GetRenderWindow()->Render();
> > > >
> > > > However, it is really interesting that this problem occurs on
> Windows
> > > > XP
> > >
> > > only ...
> > >
> > > > I must admit that it is a very special situation as the Qt-based GUI
> is
> > >
> > > implemented within a DLL and called via a Delphi-client-application.
> You
> > > can read more about the related signal/slot problems here:
> > >
> http://lists.trolltech.com/pipermail/qt-interest/2009-November/014826.htm
> > >l
> > >
> > > > Maybe there are other people struggling around with similar problems
> > > > who
> > >
> > > can take advantage of this 'solution'.
> > >
> > > > regards,
> > > >
> > > > lars
> > > >
> > > >
> > > > -------- Original-Nachricht --------
> > > >
> > > >> Datum: Mon, 23 Nov 2009 20:31:22 +0100
> > > >> Von: "Lars Friedrich Lars"<lars-friedrich at gmx.net>
> > > >> An: vtkusers at vtk.org
> > > >> Betreff: [vtkusers] QVTK resizing on Windows XP
> > > >>
> > > >>
> > > >> Hello,
> > > >>
> > > >> I have an application which uses multiple QVTKWidgets to render
> > >
> > > different
> > >
> > > >> scenes (as shown on the attached screen shots). During run-time I
> can
> > > >> resize the widgets' size with the help of splitters. Normally a
> > >
> > > VTK-scene (the
> > >
> > > >> vtkRenderWindow ...) immediately adapts to the QVTKWidget's size.
> But
> > >
> > > on
> > >
> > > >> windows XP I am facing serious problems: as can be seen von the
> second
> > >
> > > screen
> > >
> > > >> shot, the vtkRenderWindow gets cut at the bottom.
> > > >>
> > > >> Did someone face similiar problems?
> > > >>
> > > >> It may the worth to annotate that the interactor (e.g. rotating the
> > > >> camera) still works in the cut area at the bottom, but the scene is
> > > >> not
> > >
> > > rendered.
> > >
> > > >> Furthermore, this problem solely exists on Windows XP (32 and 64
> bit)
> > > >> -
> > >
> > > it
> > >
> > > >> works on Windows 2000 / Vista / 7. It also works in an ordinary
> > >
> > > executable
> > >
> > > >> on Windows XP, but not when my user interface is called out of a
> DLL.
> > > >>
> > > >> I guess there are some problems with some openGL buffers in the
> > >
> > > background
> > >
> > > >> and the device context. Are there possibilities to force the render
> > >
> > > window
> > >
> > > >> to reallocate its buffer?
> > > >>
> > > >> Can you help me, please? I am kind of desperate.
> > > >>
> > > >> regards,
> > > >>
> > > >> lars
> > > >>
> > > >> --
> > > >> GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
> > > >> Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
> > >
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