Hi there, I'm creating a new editor, with new widgets, along the lines of QmitkStdMultiWidgetEditor and QmitkStdMultiWidget. The window displays from 1x1 up to 5x5 QmitkRenderWindows.
However, I'm facing the following problem. If VTK tries to render before the Qt widget is visible, then on a Mac you get an "Invalid drawable" error and the application keeps going, but on Linux, you get an X windows error message, and the application crashes. BUT. Any view (subclass of QmitkFunctionality, or berry::QtViewPart) can call mitk::RenderingManager::GetInstance()->RequestUpdateAll() any time it wants. Also, any view derived from QmitkFunctionality as opposed to berry::QtViewPart will tend to open the QmitkStdMultiWidgetEditor by default, even if it doesn't really need it. By this I mean, something like the datamanager plugin should not really care about whether the QmitkStdMultiWidgetEditor is open or not, as it only needs to manage the datastore, and doesn't care about the visualisation). So, it seems difficult to stop VTK doing a Render on any windows before the widget is drawn on-screen, and I'm not sure how I should be preventing it. Qt filters on the QmitkRenderWindow can squash PaintEvents, but it wouldnt stop the mitk::RenderingManager. So currently my Editor is creating a number (say 2x2) of QmitkRenderWindow, and then when you change the number of rows and columns will dynamically allocate new widgets and add them to the layout. Adding things to layouts tends to trigger paint events. An alternative might be to instantiate the right number of widgets and show/hide them, but the problem still seems to exist, as each time you add them to a layout, you get paint events that you aren't ready for. It seems that MITK is currently working nicely because there is only 1 editor with rendering windows, so they are all visible at the same point. Any ideas? I think it's more philosophical guidance I'm after so that I head in the right general direction. M ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ mitk-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mitk-users
