Re: [ANNOUNCE] Tk::Gripes and Tk::SignalSlot

Ala Qumsieh <[email protected]> writes:
>Tk::Gripes is not a module, but rather the (hopefully)
>first in a series of articles that outline things I do
>not like about Tk. These articles can address
>anything, ranging from syntax, to functionality, to
>appearance.
>
>The first such article addresses Tk's binding
>mechanism, Tk::bind. It can be found on PerlTk.org:
>
>http://www.perltk.org/index.php?option=com_content&task=view&id=49&Itemid=28
>
>Briefly, Tk::bind only allows a single callback to be
>bound to an event, which is an unnecessary
>restriction, and can add a lot of confusion and
>complexity to maintaing a large code base, especially
>for programs that require a lot of user interaction.

Well :
   A. There is nothing stopping that callback calling others.
   B. It isn't true
        bind associates a callback with a tag 
        when an event occurs Tk calls the callbacks - in sequence 
        - for all the bindtags associate with the widget via bindtags.

So if you are writing a mega-widget you should bind to the class name
of that implements it. And leave the specific instance name tag for 
end-user use.

There is even a mechanism for a derived class to inherit bindings 
from its base class(es)!


  




>
>Tk::SignalSlot is a module that attempts to offer a
>cleaner, and more modular alternative to Tk::bind. It
>is loosely based on, and borrows its nomenclature
>from, Qt's signal/slot mechanism. Essentially, it
>allows you to connect() any number of callbacks to a
>specific event. You can them disconnect() connected
>callbacks very easily without affecting anything else,
>resulting in simpler, more maintainable code.
>
>Tk::SignalSlot is making its way to a CPAN mirror near
>you. In a couple of hours, you should be able to
>access it here:
>
> http://search.cpan.org/~aqumsieh/Tk-SignalSlot-0.1/
>
>Comments welcome.
>--Ala
>
>
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