def add_pane(self):
master = PanedWindow(bg=BACKGROUND_COLOR)
master.pack(side=LEFT)
master.propagate(0)
canvas = self.get_map().get_canvas()
hbar = Scrollbar(master, orient=HORIZONTAL)
hbar.pack(side=BOTTOM, fill=X)
hbar.config(command=canvas.xview)
vbar = Scrollbar(master, orient=VERTICAL)
vbar.pack(side=RIGHT, fill=Y)
vbar.config(command=canvas.yview)
canvas.config(xscrollcommand=hbar.set, yscrollcommand=vbar.set)
canvas.pack(side=LEFT, expand=True, fill=BOTH)
master.config(width=PANE_W, height=PANE_H)
master.add(canvas)
