wxPython freeze/thaw example

wxfreeze.py

import wx
 
class MyForm(wx.Frame):
  
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, "Tutorial", size=(500,500))
        self.btnNum = 1
  
        # Add a panel so it looks the correct on all platforms
        self.panel = wx.Panel(self, wx.ID_ANY)
        self.panel.Bind(wx.EVT_LEFT_DOWN, self.onClick)
         
        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.panel.SetSizer(self.sizer)
 
    def onClick(self, event):
        self.Freeze()
        btn = wx.Button(self.panel, label="Button #%s" % self.btnNum)
        self.sizer.Add(btn, 0, wx.ALL, 5)
        self.sizer.Layout()
        self.Thaw()
         
        self.btnNum += 1
  
# Run the program
if __name__ == "__main__":
    app = wx.App(False)
    frame = MyForm()
    frame.Show()
    app.MainLoop()