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

       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.

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

       All [incrTk] 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.

       class, object, object-oriented, mega-widget

itk                                                    3.0                                             itk(3itk)

       itk - framework for building mega-widgets in Tcl/Tk
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[incrWidgets]  is a mega-widget library built using [incrTk].  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.