In my current application I am using pyqtgraphs ParameterTree that inherently implements an undo function for its elements. However this interferes with my global undo-stack, therefore I would like to filter Strg+Z events. ParameterTree inherits from QTreeWidget, therefore I tried some methods. Firstly, I tried to install an Event Filter (but I am not sure, if I have done this right to be fair). class FooterWidget(ParameterTree): """ Class for meta-properties of the map footer. """ def __init__(self, main_gui, parent=None): super().__init__(parent=parent) self.viewport().installEventFilter(self) ... def eventFilter(self, object, event): if isinstance(event, QKeyEvent): return(event.key() & Qt.Key_Control > 0) return False This however does not prevent the Ctrl+Z action from being done. Also when I am filtering any keyPresses (i.e. eventFilter returns True in any case), I still see some input visible. This makes me guess that in fact the actual event is propagated to the children of the parameter tree before the actual event filter. Also a reimplementation of the keyPressEvent method did not help. Is there any way to interfere with the local undo of the Parameter Tree or rather its items? Continue reading...
