Re: [wxperl-users] Validators

[Mattia B. <mb...@ds...>]

> Hi Marcus,
> Validators are similar to, but not the same as, Perl/Tk.  As you say, in
> Perl/Tk, changes to the underlying variable immediately appear in the Tk
> widget - a great feature but also a source of problems, as you have found.
> 
> However, I think that Wx validators only transfer the data to the control
> when $window->TransferDataToWindow is called, and back again when
> $window->TransferDataFromWindow is called. (I'll check this out with some
> trials).
This is correct.

> For wxDialogs, these are both called automatically as part of Dialog
> initialisation and dismissal (TransferDataFromWindow is only called when the
> modal result is wxID_OK, I think).
And this too.
BTW, there is a wxValidator overview in the wxWindows manual
(Topics overview -> wxValidator overview; I am not sure how much C++=oriented
 it is, but may be worth reading, especially "How validators interact with dialogs")
 
> One feature I'm thinking of implementing is the ability to supply a callback
> for the TransferToWindow and TransferFromWindow wxValidator methods, so that
> we can supply data from object methods and pump data back into object
> methods, rather than having to rely on variable addresses. (Most of my Perl
> code is OO, and so I want to be able to use property accessors, rather than
> property addresses).
This looks like a nice feature, BTW

Regards
Mattia