nested_sizers.py 文件源码

def __init__(self):
        """Constructor"""
        wx.Frame.__init__(self, None, title="Center the Button")
        panel = wx.Panel(self)

        main_sizer = wx.BoxSizer(wx.VERTICAL)

        btn = wx.Button(panel, label="Centered")
        main_sizer.AddStretchSpacer()
        main_sizer.Add(btn, 0, wx.CENTER)
        main_sizer.AddStretchSpacer()

        panel.SetSizer(main_sizer)

        self.Show()