[Qt-interest] Create a new GUI Thread

[Malyushytsky, Alex]

Is dialog modal?
Modal dialogs have its own event loops.
If vtk widget rely on QApplication event loop it might be a problem.
In this case try to use modeless dialog.

Also there is a vtkuser mailing list which might provide more help, cause people there might have better knowledge what is required to support functionality of vtkwidgets.

Regards,
   Alex

________________________________
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Luis Roberto P. Paula
Sent: Wednesday, February 11, 2009 5:33 AM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] Create a new GUI Thread

Hi Andreas,

>> So you want two event loops that run in parallel, not one loop that blocks
the other (which can be done with QDialog::exec())? May I ask why?

I'm using VTK (www.vtk.org<http://www.vtk.org>) with QT and for some reson, the callbacks of vtk are only captured if the observers are set before the command qApp->exec() in the main function.

It works fine for the main window, but I also have vtkwidgets in a Dialog that is loaded after the click of a button in the main window. In the Dialog, the callbacks are not working. The Dialog callbacks only works if it is loaded before the qApp->exec() in the main function.


Luis


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