如何使用文件对话框按钮更改现有wxPython对象的值

import wx

app = wx.App()

frame = wx.Frame(None, title="文件对话框示例", size=(400, 300))

panel = wx.Panel(frame)

button = wx.Button(panel, label="打开文件对话框")

def on_button_click(event):
    dialog = wx.FileDialog(panel, "选择文件", wildcard="All files (*.*)|*.*", style=wx.FD_OPEN | wx.FD_FILE_MUST_EXIST)
    if dialog.ShowModal() == wx.ID_OK:
        selected_file = dialog.GetPath()
        # 在这里更新现有wxPython对象的值
        # 例如，可以将选定的文件路径设置为文本框的值
        text_ctrl.SetValue(selected_file)
    dialog.Destroy()

button.Bind(wx.EVT_BUTTON, on_button_click)

text_ctrl = wx.TextCtrl(panel, style=wx.TE_READONLY)

sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(button, 0, wx.ALL, 10)
sizer.Add(text_ctrl, 0, wx.ALL, 10)
panel.SetSizer(sizer)

frame.Show()
app.MainLoop()