wxpython: "background text" into MDI parent frame

[dazzler]

How do I add "background text" into MDI parent frame, the text will be now erased if I move the MDI Parent frame, or I can also erase text with moving MDI Child frame, need to somehow refresh the text, how to do it?

wx.FULL_REPAINT_ON_RESIZE style on MDI parent frame would help a little, but I would also need to call self.Layout() (and I still can erase the text moving child frame over the text...)

#!/usr/bin/env python
# -*- coding: UTF-8 -*-
 
import wx
 
class MyFrame(wx.MDIParentFrame):
   def __init__(self):
 
      wx.MDIParentFrame.__init__(self, None, title="testing", id=-1, size=(400, 400), style=wx.DEFAULT_FRAME_STYLE | wx.FRAME_NO_WINDOW_MENU)
 
      background_text = wx.StaticText(self, id=-1, label="This is background text", style=wx.ALIGN_RIGHT)
      background_text.SetBackgroundColour("#BB0000")
 
      vbox = wx.BoxSizer(wx.VERTICAL)
      vbox.AddSpacer((1,1),1)
      vbox.Add(background_text, 0, wx.ALL|wx.ALIGN_RIGHT, 5)
 
      self.SetAutoLayout(True)
      self.SetSizer(vbox)
      self.Layout()
 
      child_frame = wx.MDIChildFrame(self, -1, "MDI child", size=(150,150))
      child_frame.Show(True)
 
app = wx.PySimpleApp()
MyFrame().Show()
app.MainLoop()