RE: [wxperl-users] Re: wxValidator available via wxPerl

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

> Dear Mattia (or others, if they can help),
> I've been delving into how to use wxValidators, and I think I understand the
> concept (and I like it!).
> 
> However, I'm having real trouble deriving my own validator (called,
> unimaginitively, myValidator) from Wx::PlValidator.
> 
> >From the wxWindows documentation, all validators must implement a Clone
> method.  I have tried implementing a Clone method, which I can see getting
> called, but myValidator's Validate, TransferFromWindow, and TransferToWindow
> never seem to get called.
> 
> Here is my code (with the methods apart from Clone doing nothing useful
> apart from printing to STDOUT):
> 
> VVVVVVVVVVVVVVVVVVVV
> use Wx;
> 
> package myValidator;
This is OK ( in fact the sample I sant uses this code )

> ^^^^^^^^^^^^
> 
 
> Could you post a very simple example of how to create a validator class in
> Perl, and how to create a frame which uses it, please?
Here is your example ( modified minimal sample, use Help->About to
show the validator dialog )

I am getting a "Attempt to free unreferenced scalar at 
C:/Developement/wxPerl/wxPerl/blib/lib/Wx.pm line 61.", 
which I was not getting when I first tested Validators.
It is obviously something I am doing wrong with reference
counting in wxPerl; will fix.

A caveat: do not use a validator after you did
->SetValidator(); for implementation reasons,
once you do ->SetValidator() it is no more valid.

Regards
Mattia