Method notify_axes_change

lib/matplotlib/backend_bases.py:2797–2800

(fig)

        @self.canvas.figure.add_axobserver
        def notify_axes_change(fig):
            # Called whenever the current Axes is changed.
            if self.toolmanager is None and self.toolbar is not None:
                self.toolbar.update()

    @classmethod
    def create_with_canvas(cls, canvas_class, figure, num):