def METHOD_NAME(self, event):
    """
    listbox = self.taskListBox.component('listbox')
    index = listbox.nearest(event.y)
    listbox.selection_clear(0)
    listbox.activate(index)
    self.taskListBox.select_set(index)
    self.setCurrentTask()
    """
    self._popupMenu.post(event.widget.winfo_pointerx(),
                         event.widget.winfo_pointery())
    return "break"