At 09:15 AM 5/8/2008, Robin Dunn wrote:
> Phil Mayes wrote:
> >Hi all,
> >I want to limit the number of characters typed into the text field of a 
> >CB_DROPDOWN ComboBox.  I thought I had seen a way of getting the TextCtrl 
> >so I can  apply SetMaxLength(), but can't find any references to it in 
> >the archives.
> 
> Unfortunately there isn't a built-in way to do tha with a combobox. You'll 
> have to catch events (EVT_CHAR and/or maybe EVT_TEXT) and impose the limit 
> yourself.

Thank you Robin, that works well:

     def OnTextValue(self, evt):
         """User has inserted text into combo box;
         check that maximum length is not exceeded
         """
         wnd = evt.GetEventObject()
         s = wnd.GetValue()
         over = len(s) - self.valueLength
         if over >  0:
             n = wnd.GetInsertionPoint()
             m = n - over
             wnd.SetValue(s[:m] + s[n:])
             wnd.SetInsertionPoint(m)

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