The draw_event, resize_event, close_event, key_press_event, key_release_event, pick_event, scroll_event, button_press_event, button_release_event, motion_notify_event, enter_notify_event and leave_notify_event methods of .FigureCanvasBase are deprecated. They had inconsistent signatures across backends, and made it difficult to improve event metadata.
In order to trigger an event on a canvas, directly construct an .Event object of the correct class and call canvas.callbacks.process(event.name, event).