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 con­
       tainer for the mega-widget.  It is used to build mega-wid­
       gets,  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

       tains 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


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