[vtkusers] QVTKWidget is flickering

[Clinton Stimpson]

The flicker comes from converting the parent widget of QVTKWidget (in this 
case, your view manager) from an alien widget to a native one.

In your Workspace.__init__, you can call 
self.view_manager.setAttribute(QtCore.Qt.WA_NativeWindow)
so its a native window from the start.

Clint

On Monday, June 04, 2012 01:17:37 PM José M. Rodriguez Bacallao wrote:
> I am using Archlinux, 64 and 32 bits, and using vtk 5.10.
> I also tried setting self.view_manager.setUpdatesEnabled(False/True)
> but nothing happens
> 
> On Mon, Jun 4, 2012 at 1:04 PM, Clinton Stimpson <clinton at elemtech.com> 
wrote:
> > Which platform... VTK version ?
> > 
> > On Monday, June 04, 2012 12:55:34 PM José M. Rodriguez Bacallao wrote:
> >> hi folks, as I posted previously, I am trying to use QVTKWidget with
> >> QStackedWidget, I have two QStackedWidget nested one inside the other.
> >> For examples, I have a QMainWindow and as central widget is a
> >> QStackWidget that manage what I call "applications". An application is
> >> a simple QWidget, and, in my case, is a QWidget with a QStackWidget
> >> inside it that manage QVTKWidget's (image viewers). The problem arise
> >> when I add a QVTKWidget to the internal QStackedWidget, it show ok
> >> but, has an annoying flickering and I canot allow this in a medical
> >> application, here I post an example code to demostrate what I mean:
> >> 
> >> 
> >> from PyQt4 import QtGui, QtCore
> >> import images, vtk
> >> 
> >> 
> >> class Workspace(QtGui.QMainWindow):
> >> 
> >>     def __init__(self, parent=None):
> >>         super(Workspace, self).__init__(parent)
> >> 
> >>         self.main_tb = self.addToolBar('main')
> >>         self.add_action = self.main_tb.addAction('Add viewer')
> >>         self.add_action.triggered.connect(self.add_viewer)
> >> 
> >>         self.app_manager = QtGui.QStackedWidget(self)
> >>         self.app_manager.setStyleSheet('background: red;')
> >>         self.setCentralWidget(self.app_manager)
> >> 
> >>         self.workspace_app = QtGui.QWidget(self.app_manager)
> >>         self.view_manager = QtGui.QStackedWidget(self.workspace_app)
> >>         self.view_manager.setStyleSheet('background: blue;')
> >>         self.workspace_app_layout =
> >> QtGui.QHBoxLayout(self.workspace_app)
> >> self.workspace_app_layout.addWidget(self.view_manager)
> >> 
> >>         self.app_manager.addWidget(self.workspace_app)
> >>         self.app_manager.setCurrentWidget(self.workspace_app)
> >> 
> >>     def add_viewer(self):
> >>         viewer = vtk.QVTKWidget(self)
> >>         self.renderer = vtk.vtkRenderer()
> >>         self.renderer.SetBackground(0, 0, 0)
> >>         viewer.GetRenderWindow().AddRenderer(self.renderer)
> >>         self.view_manager.addWidget(viewer)
> >>         self.view_manager.setCurrentWidget(viewer)
> >> 
> >> 
> >> if __name__ == '__main__':
> >>     app = QtGui.QApplication([])
> >>     w = Workspace()
> >>     w.showFullScreen()
> >>     app.exec_()
> >> 
> >> any ideas please, I need to solve this issue as quickly as possible
> >> because of my deadline!!!.
> >> _______________________________________________
> >> Powered by www.kitware.com
> >> 
> >> Visit other Kitware open-source projects at
> >> http://www.kitware.com/opensource/opensource.html
> >> 
> >> Please keep messages on-topic and check the VTK FAQ at:
> >> http://www.vtk.org/Wiki/VTK_FAQ
> >> 
> >> Follow this link to subscribe/unsubscribe:
> >> http://www.vtk.org/mailman/listinfo/vtkusers
> > 
> > --
> > Clinton Stimpson
> > Elemental Technologies, Inc
> > Computational Simulation Software, LLC
> > www.csimsoft.com
> 
> _______________________________________________
> Powered by www.kitware.com
> 
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
> 
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
> 
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
-- 
Clinton Stimpson
Elemental Technologies, Inc
Computational Simulation Software, LLC
www.csimsoft.com