[PyQt] QGraphicsView, QTableView and a QComboBox Editor

[Aron Bierbaum]

We are running into a few issues with item views and QGraphicsView. We
have a custom delegate that displays a combo box with valid values.
The issue we are seeing is that this works great when using the basic
QTableView. But as soon as we add the view to a QGraphicsProxyWidget
so that we can place it in a QGraphicsScene, the combo box no longer
appears when editing. Does anyone have any ideas how to work around
this, or do you know if this is a known issue? I have attached a
simple example showing the issue.

Thanks,
Aron
-------------- next part --------------
import sys
from PyQt4 import QtCore, QtGui

class ListModel(QtCore.QAbstractListModel):
   def __init__(self, parent = None):
      QtCore.QAbstractListModel.__init__(self, parent)

      self._values = [True, False, True, False]

   def rowCount(self, parentIdx):
      return len(self._values)

   def flags(self, index):
      """
      Returns the item flags for the given \p index.
      """
      if not index.isValid():
         return QtCore.Qt.ItemIsEnabled

      return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEditable

   def data(self, index, role = QtCore.Qt.DisplayRole):
      if not index.isValid():
         if role == QtCore.Qt.UserRole:
            return None
         else:
            return QtCore.QVariant()

      value = self._values[index.row()]

      if QtCore.Qt.UserRole == role:
         return values
      elif role == QtCore.Qt.DisplayRole or role == QtCore.Qt.EditRole:
         return QtCore.QVariant(value)
      return QtCore.QVariant()


if __name__ == "__main__":
   app = QtGui.QApplication(sys.argv)

   list_view1 = QtGui.QListView()
   model1 = ListModel()
   list_view1.setModel(model1)
   list_view1.setWindowTitle("Working")
   list_view1.show()

   list_view2 = QtGui.QListView()
   model2 = ListModel()
   list_view2.setModel(model2)

   scene = QtGui.QGraphicsScene()
   proxy = scene.addWidget(list_view2)
   graphics_view = QtGui.QGraphicsView(scene)
   graphics_view.setWindowTitle("Not Working")
   graphics_view.show()


   app.exec_()