def showEvent(self, event):
        """ Reimplemented to connect signal handlers and event filter.
        """
        super().showEvent(event)
        self._text_edit.cursorPositionChanged.connect(
            self._cursor_position_changed)
        self._text_edit.installEventFilter(self)
 Reimplemented to connect signal handlers and event filter.
        
angrmanagement/vendor/qtconsole/call_tip_widget.py