imo each form-component should have a paramter called "changeListener" which does the obvious - like in desktop gui-programming. I proposed this some time ago with no echo ... So, those who would like that, should scream "DO IT" now :-)
> -----Original Message----- > From: Stephane Decleire [mailto:[EMAIL PROTECTED] > Sent: Monday, May 29, 2006 4:26 PM > To: Tapestry users > Subject: Re: Retrieve the old value of a field in the form listener > > > Yes i could ... > but it looks like an elephant gun just to keep the trac of an > old value > that Tapestry has to know ... but where ? :-\ > > Peter Svensson wrote: > > > Maybe you could store the old value in a state object ? It's > > described in > > chapter four of Enjoying Web Development with tapestry, and as it > > turns out > > the first four chapters are freely downloadable from; > > > > http://agileskills2.org/EWDT/ > > > > Then you can save the latest or last value in that object, > which will > > survive between pages (or user sessions) as you wish. You > could even > > have a > > queue which you could use for undo. > > > > Cheers, > > PS > > > > On 5/29/06, Stephane Decleire > <[EMAIL PROTECTED]> wrote: > > > >> > >> Perhaps i took a wrong approach ... > >> In fact, i need to apply specific code if a particular > field of my form > >> has been updated and not in the other case. So i need to > compare the old > >> to the new value of this field but i can't find a way to > get the old > >> value after the form has benn submitted ... > >> > >> Stephane Decleire wrote: > >> > >> > Hi all, > >> > > >> > I need to get the old value of a form field in the > listener of this > >> > form but i can't get this value before it's been updated > with the data > >> > submitted by the client ... > >> > Any idea is welcome ! > >> > > >> > >> -- > >> Stéphane Decleire > >> > >> 05 56 57 99 20 > >> 06 63 78 69 06 > >> > >> > >> > > > > -- > Stéphane Decleire > > 05 56 57 99 20 > 06 63 78 69 06 > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
