Re: Verifying Entry inputs

On Fri, 25 Feb 2005 09:11:56 +0100, Hans-Joachim Widmaier
<hjwidmaier@xxxxxx> wrote:
> Hi all,
> 
> I'd like to have Entry widgets that allow only numbers (float) as inputs, and 
> only
> in a certain range. 

May be this function will help you:

def entry_float(entry, new_text, new_text_length, position):
    """Connect insert-text signal to this function to validate
    floating type"""
    lst_old_string = list(entry.get_chars(0, -1))
    _pos = entry.get_position()
    lst_new_string = lst_old_string.insert(_pos, new_text)
    _string = "".join(lst_old_string)
    _hid = entry.get_data('handlerid')
    entry.handler_block(_hid)
    try:
        _val = float(_string)
        _pos = entry.insert_text(new_text, _pos)
    except StandardError, e:
        pass
    entry.handler_unblock(_hid)
    gtk.idle_add(lambda t: t.set_position(t.get_position()+1), entry)
    entry.stop_emission("insert-text")
    pass


Usage:-
 self.etrInfo = gtk.Entry()
 handlerid = self.etrInfo.connect("insert_text",  entry_float)
 self.etrInfo.set_data('handlerid', handlerid)

Regards,
Baiju M
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