[tcltk-perl] how to extract perlTk support to separate files (modules)

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

Once we have now every type of perlTk widget to live on its own package --
(Button in Tcl::Tk::Widget::Button and so on), it will be extremely easy to
separate those into separate module and have them removed from Tk.pm file.

Say, create files
./lib/Tcl/Tk/Widget/Menu.pm
./lib/Tcl/Tk/Widget/Menubutton.pm

put proper text in there (we already have text in $Tcl::Tk::VTEMP), put
there methods (those are currently arguments to
"create_method_in_widget_package") and here it is.
Need only to replace in those subroutines $wint{$$wid} with more correct
$wid->interp

After small addition to Tcl::Tk::Widget::AUTOLOAD widget package will be
loaded on demand.

Right now, Tk.pm is small enough, and I think there's no real need to remove
something yet.
Module could grow twice its size, then we'll move out documentation to
Tcl::Tk.pod file.

However I'll move one or more Tix widgets to see how it works and to create
a sample way for other widgets to follow.
First candidate is Tix's Balloon widget.

If anyone have ideas, please let me know.

Best regards,
Vadim.