backend_tkagg.py 文件源码

def __init__(self, canvas, num, window):
        FigureManagerBase.__init__(self, canvas, num)
        self.window = window
        self.window.withdraw()
        self.set_window_title("Figure %d" % num)
        self.canvas = canvas
        self._num =  num
        if matplotlib.rcParams['toolbar']=='toolbar2':
            self.toolbar = NavigationToolbar2TkAgg( canvas, self.window )
        else:
            self.toolbar = None
        if self.toolbar is not None:
            self.toolbar.update()
        self.canvas._tkcanvas.pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)
        self._shown = False

        def notify_axes_change(fig):
            'this will be called whenever the current axes is changed'
            if self.toolbar != None: self.toolbar.update()
        self.canvas.figure.add_axobserver(notify_axes_change)