keep track of your tk widgets easily

when writing a tk application, it's almost always a good idea to keep track of your widgets: this allows to change their state later on.

most of the time, a simple hash is enough; but it is usually wrapped up in methods to make the hash private to the window object. and of course, those methods are duplicated in all modules, under a form or another...

since duplication is bad, i just released Tk::Role::HasWidgets which is a moose role, and provides with a convenient way to store & retrieve your widgets:
use Moose;
    with 'Tk::Role::HasWidgets';

    # when creating a widget
    $self->_set_w( 'my_button', $button );

    # later on, in one of the methods
    $self->_w( 'my_button' )->configure( ... );

the methods featured in this role begin with "_", that is, they are following perl convention of private methods. this is on purpose: remember that this module is a role, consumed by your class. and you don't want those methods to be available outside of the window class, do you?

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