NAME

       itk - framework for building mega-widgets in Tcl/Tk
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DESCRIPTION

       Mega-widgets  are  high-level  widgets  that are constructed using Tk widgets as component
       parts, usually without any C code.  A  fileselectionbox,  for  example,  may  have  a  few
       listboxes,  some entry widgets and some control buttons.  These individual widgets are put
       together in a way that makes them act like one big widget.  A fileselectionbox mega-widget
       can be created with a command like:
              fileselectionbox .fsb -background blue -foreground white
       Once it has been created, it can be reconfigured with a command like:
              .fsb configure -background green -foreground black
       and  all  of  its  internal  components  will change color.  Each mega-widget has a set of
       methods that can be used to manipulate it.  For example,  the  current  selection  can  be
       queried from a fileselectionbox like this:
              set fileName [.fsb get]
       In  effect,  a  mega-widget  looks  and acts exactly like a Tk widget, but is considerably
       easier to implement.

       [incr Tk] is a framework for building mega-widgets.  It uses  [incr Tcl]  to  support  the
       object paradigm, and adds base classes which provide default widget behaviors.

       All  [incr Tk]  widgets  are  derived  from  the Archetype base class.  This class manages
       internal component widgets, and provides methods like "configure"  and  "cget"  to  access
       configuration options.

       The  Widget  base class inherits everything from Archetype, and adds a Tk frame which acts
       as a container for the mega-widget.  It is used to build mega-widgets that sit  inside  of
       other  frames  and  toplevels.   Derived classes create other internal components and pack
       them into the "hull" frame created by the Widget base class.

       The Toplevel base class inherits everything from Archetype, but adds a Tk  toplevel  which
       acts as a container for the mega-widget.  It is used to build mega-widgets, such as dialog
       boxes, that have their  own  toplevel  window.   Derived  classes  create  other  internal
       components and pack them into the "hull" toplevel created by the Toplevel base class.

[incr Widgets] LIBRARY

       [incr Widgets]  is  a mega-widget library built using [incr Tk].  It can be used right out
       of the box, and contains more than 30 different widget classes, including:

       -      fileselectiondialog

       -      tabnotebook

       -      panedwindow

       -      combobox

       -      optionmenu

       -      scrolledlistbox

       -      scrolledframe

       -      messagedialog

       -      and many others...

       The catalog demo in the "iwidgets/demos" directory shows all of the available  widgets  in
       action.  Each widget class has its own man page describing the features available.

KEYWORDS

       class, object, object-oriented, mega-widget