redraw the text

def draw(self, parent, box):
        '''redraw the text'''
        import wx
        if self.textctrl is None:
            self.textctrl = wx.TextCtrl(parent, style=wx.TE_MULTILINE|wx.TE_READONLY)
            self.textctrl.WriteText(self.text)
            self._resize()
            box.Add(self.textctrl, flag=wx.LEFT, border=0)
        box.Layout()