使用类Glade Gtk + python3更改微调器状态

Question

我开始学习使用gtk +创建ui的python3。

所以我想在点击按钮时让spinner开始在我的ui中工作，但点击按钮时没有任何反应

如果我按照GTK +教程，微调器工作正常。但我喜欢在我的代码中使用类我喜欢这里的sugestion（http://python-gtk-3-tutorial.readthedocs.org/en/latest/builder.html#example）来使一些类在connect_signals中调用动作

有人可以帮帮我吗？

我的python代码：

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys

try:
    from gi.repository import Gtk
except ImportError:
    print >> sys.stderr, 'ERRO: requer a lib python3-gi'
    sys.exit(1)

require_version('Gtk', '3.0')

class application:
    def __init__(self):
        self.builder = Gtk.Builder()
        self.builder.add_from_file("stack.glade")
        self.builder.connect_signals(actions())
        self.spinner = self.builder.get_object("spinner1")

    def spinner_start(self):
        self.spinner.start()

class actions:

    def onDeleteWindow(self, *args):
        Gtk.main_quit(*args)

    def onButtonClick(self, widget, button="button1"):
        application().spinner_start()

if __name__ == "__main__":
    main = application()
    window = main.builder.get_object("window1")
    window.show()
    Gtk.main()

我的林间文件：

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.18.3 -->
<interface>
  <requires lib="gtk+" version="3.12"/>
  <object class="GtkWindow" id="window1">
    <property name="can_focus">False</property>
    <child>
      <object class="GtkBox" id="box1">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="orientation">vertical</property>
        <child>
          <object class="GtkEntry" id="entry1">
            <property name="visible">True</property>
            <property name="can_focus">True</property>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <object class="GtkButton" id="button1">
            <property name="label" translatable="yes">button</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
            <signal name="clicked" handler="onButtonClick" swapped="no"/>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">1</property>
          </packing>
        </child>
        <child>
          <object class="GtkSpinner" id="spinner1">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">2</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>