如何滚动到wxTextCtrl底部并重绘屏幕

import wx

class MyFrame(wx.Frame):
    def __init__(self, *args, **kw):
        super(MyFrame, self).__init__(*args, **kw)
        
        # 创建一个 wxTextCtrl 控件
        self.text_ctrl = wx.TextCtrl(self, style=wx.TE_MULTILINE | wx.HSCROLL | wx.VSCROLL)
        
        # 添加一些文本以便测试滚动
        self.text_ctrl.AppendText("Line 1\nLine 2\nLine 3\n" * 50)
        
        # 创建一个按钮，点击后滚动到底部
        self.scroll_to_bottom_btn = wx.Button(self, label="Scroll to Bottom")
        self.scroll_to_bottom_btn.Bind(wx.EVT_BUTTON, self.on_scroll_to_bottom)
        
        # 设置布局
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.text_ctrl, 1, wx.EXPAND)
        sizer.Add(self.scroll_to_bottom_btn, 0, wx.CENTER)
        self.SetSizer(sizer)
    
    def on_scroll_to_bottom(self, event):
        # 滚动到文本控件的底部
        self.text_ctrl.ScrollLines(self.text_ctrl.GetNumberOfLines() - self.text_ctrl.GetLineLength(self.text_ctrl.GetNumberOfLines() - 1))
        
        # 重绘屏幕
        self.text_ctrl.Refresh()

if __name__ == "__main__":
    app = wx.App(False)
    frame = MyFrame(None, title="wxTextCtrl Scroll Example", size=(400, 300))
    frame.Show(True)
    app.MainLoop()