Hi Kene,
I had a similar issue with OCC display initialization (I use tabs in my
application,
each of which contains a QtGui.QMainWindow).
To avoid issues with the display initialization I use Qt signals to initialize
the OCC display
_after_ the Qt GUI has initialized and is displayed.
In class ViewerMainWindow(QtGui.QMainWindow):
---------------------------------------------------------
def __init__(self):
self.graphicsView = MyQtViewer3d(self.viewer_centralwidget) # derived
from qtViewer3d
self._graphicsinitialized = False
self.connect(self.graphicsView,
QtCore.SIGNAL("sigGraphicsInitialised"), self.slotGraphicsInitialised)
def AssertGraphicsInitialized(self):
# This fucntion will be called each time the application switches
# to the viewer window. Using this function occ graphics driver
initialization is delayed until the
# viewer window is displayed the first time to ensure the GUI has
already been
# created upon graphics driver initialization.
if not self._graphicsinitialized:
self.graphicsView.InitDriver()
def slotGraphicsInitialised(self):
self._graphicsinitialized = True
self.SetDefaultBackground()
In class class MyQtViewer3d(qtViewer3d)
---------------------------------------------------------
def InitDriver(self):
qtViewer3d.InitDriver(self)
self._display.EnableAntiAliasing()
self.SetupTrihedron()
self.context=self._display.GetContext().GetObject() #
AIS_InteractiveContext
self.emit(QtCore.SIGNAL("sigGraphicsInitialised"), ())
Which Qt signal you could use to trigger a call to AssertGraphicsInitialized
depends on your application of course.
You might also try to simply override the paintEvent method:
def paintEvent(self, event):
QtGui.QMainWindow.paintEvent(self, event)
self. AssertGraphicsInitialized()
Hope this helps,
Mark
Am 29.03.2013 um 02:57 schrieb Kene Meniru:
> Hi:
>
> I am creating an app which customizes QtGui.QMainWindow. I am using
> splitters to split my screen into four areas and have the following code in
> my __init__ definition to create tabs in one of the areas:
>
> ----- start code
>
> # Create TabWidget
> self.viewArea = QtGui.QTabWidget()
> # Add tabs
> self.modelTab = modelview.ModelView(self)
> self.reportTab = QtGui.QTextBrowser()
> self.viewArea.addTab(self.modelTab, "Model")
> self.viewArea.addTab(self.reportTab, "Report")
> self.modelTab.InitDriver()
>
> ------ end code
>
> The modelview module contains the code provided below but it does not work
> for me. It produces the following messages and dies with a "Segmentation
> fault".
>
> ###### 3D rendering pipe initialisation #####
> Display3d class initialization starting ...
> Graphic device created.
>
> I would like to load the OCCViewer in the modelTab so that I can use
> pythonOCC in that tab.
>
> Any help will be sincerely appreciated. Thanks.
>
> ----- start modelview module code
>
> from PyQt4 import QtGui
> import OCCViewer
>
>
> class qtBaseViewer(QtGui.QWidget):
> ''' The base Qt Widget for an OCC viewer
> '''
> def __init__(self, parent=None):
> super(qtBaseViewer, self).__init__(parent)
> self._display = None
> self._inited = False
> self.setMouseTracking(True) # enable Mouse Tracking
> self.setFocusPolicy(QtCore.Qt.WheelFocus) # Strong focus
> self.setAttribute(QtCore.Qt.WA_PaintOnScreen)
> self.setAttribute(QtCore.Qt.WA_NoSystemBackground)
>
> def GetHandle(self):
> return int(self.winId())
>
> def resizeEvent(self, event):
> if self._inited:
> self._display.OnResize()
>
>
> class ModelView(qtBaseViewer):
> def __init__(self, *kargs):
> super(ModelView, self).__init__(*kargs)
> self._drawbox = False
> self._zoom_area = False
> self._select_area = False
> self._inited = False
> self._leftisdown = False
> self._middleisdown = False
> self._rightisdown = False
> self._selection = None
>
> def InitDriver(self):
> self._display = OCCViewer.Viewer3d(self.GetHandle())
> self._display.Create()
> self._display.DisplayTriedron()
> self._display.SetModeShaded()
> self._inited = True
> print "Inited!!"
>
> ----- end modelview module code
>
>
> --
>
> Kene
> ::::::::::::::::::
> kemen...@gmail.com
>
>
> _______________________________________________
> Pythonocc-users mailing list
> Pythonocc-users@gna.org
> https://mail.gna.org/listinfo/pythonocc-users
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