[incr Tk] is Tk extension that provides object-oriented features that are missing from the Tk extension to Tcl. The OO features provided by itk are useful for building megawidgets.
|Archetype||base class for all [incr Tk] mega-widgets|
|Toplevel||base class for mega-widgets in a top-level window|
|Widget||base class for mega-widgets within a frame|
|itk||framework for building mega-widgets in Tcl/Tk|
|itkvars||variables used by [incr Tk]|
|usual||The usual command is used outside of an [incr Tcl] class definition to define the usual set of option-handling commands for a component widget.|