[Urwid] detecting when an edit box has changed

[Ian Ward]

Derek Peschel wrote:
> On Fri, Jul 07, 2006 at 11:36:09PM -0400, Ian Ward wrote:
>> Eric S. Johansson wrote:
>>
>>> is there any way to detect when an edit box has changed short of 
>>> comparing against some "original" data source?
>> You can hook its keypress() function and check if it returned None 
>> (which means that the key was handled by the edit widget. To do that you 
>> can either subclass the Edit widget or the WidgetWrap class to define 
>> your own keypress function.
> 
> I swore I'd let urwid wait for a day or two, but people keep addressing
> topics I've also been thinking about.
> 
> All keypresses don't create changed text; some just move the cursor.  Even
> the keystrokes that you expect to change text (like backspace) don't always,
> as when you backspace at the beginning of the text.  

With Urwid 0.9.5 you can now hook the set_edit_text() function to 
capture all changes to the text in an Edit widget.

Hope this helps!

Ian