Override drag and drop behavior associated with Slicer main window

slicer_mainwindow_drag_and_drop_override.py

class EventManager(qt.QObject):
    def eventFilter(self, object, event):
        """
        Custom event filter for Slicer Main Window.

        Inputs: Object (QObject), Event (QEvent)
        """
        if event.type() == qt.QEvent.DragEnter:
            self.dragEnterEvent(event)
            return True
        if event.type() == qt.QEvent.Drop:
            self.dropEvent(event)
            return True
        return False

    def dragEnterEvent(self, event):
        """
        Actions to do when a drag enter event occurs in the Main Window.

        Read up on https://doc.qt.io/qt-5.12/dnd.html#dropping
        Input: Event (QEvent)
        """
        event.ignore()

    def dropEvent(self, event):
        """
        Actions to do when an item is dropped onto the Main Window.

        Read up on https://doc.qt.io/qt-5.12/dnd.html#dropping
        Input: Event (QEvent)
        """
        pass


event_manager = EventManager()

slicer.util.mainWindow().installEventFilter(event_manager)