如何自动滚动gtk.scrolledwindow？

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

class ScrolledWindowExample(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title='Scrolled Window Example')

        # 创建一个滚动窗口
        self.scrolled_window = Gtk.ScrolledWindow()
        self.add(self.scrolled_window)

        # 创建一个垂直滚动条
        self.vadjustment = Gtk.Adjustment(0, 0, 100, 1, 10, 0)
        self.scrolled_window.set_vadjustment(self.vadjustment)

        # 创建一个水平滚动条
        self.hadjustment = Gtk.Adjustment(0, 0, 100, 1, 10, 0)
        self.scrolled_window.set_hadjustment(self.hadjustment)

        # 创建一个水平和垂直滚动条的容器
        self.box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
        self.scrolled_window.add(self.box)

        # 添加一些小部件到容器中
        for i in range(20):
            button = Gtk.Button(label='Button ' + str(i))
            self.box.pack_start(button, True, True, 0)

        # 设置滚动条的值，以便自动滚动到最新的内容
        self.vadjustment.set_value(self.vadjustment.get_upper() - self.vadjustment.get_page_size())
        self.hadjustment.set_value(self.hadjustment.get_upper() - self.hadjustment.get_page_size())

window = ScrolledWindowExample()
window.connect('destroy', Gtk.main_quit)
window.show_all()
Gtk.main()