[tcltk-perl] RE: $widget->exists

[Konovalov, V. <vko...@sp...>]

> The following change:
> 
>              * lib/Tcl/Tk.pm: perlTk compatibility: sub PathName,
>              Exists, class, toplevel, parent, *all* winfo methods.
> 
> broke our app, because we used $bwtree->exists($path) to access the
> ".tree exists path" subcommand of BWTree.  After this change this
> method call was routed to winfo instead.  I fixed it in our sources be
> removing the winfo override for exists.  I suggest we make that
> official too.  There is already Tcl::Tk::Exists() for doing 'winfo
> exists' checks.

Let it be like you said!

Will you insert this change by yourself?



> 
> Anyway, this illustrates that we need a better mechanism to deal with
> conflicts like this.  There should be a way for force method calls to
> resolve a particular way.

Firstly, you can always define specific method for any widget and no
AUTOLOAD will mix with it.

Secondly, situation was worse recently, when all non-trivial widgets created
methods in Tcl::Tk::Widget package and therefore could mix with each other
easily.



Also, there exists a TODO comment in AUTOLOAD and there is an explanation
about restricting method names in Widget autoloading mechanism

Personally to me, I very like current situation where exists such a
mechanism when you can work in perlTk way even with new widgets. like in
http://www.perlmonks.org/index.pl?node_id=346153


Best regards,
Vadim.