http://www.satisoft.com/tcltk/gridplus2

New and Enhanced Features
------------------------------------------
*) New "=default" option to specify default dropdown option.
*) New "~command" link option to specify command to invoke when
   link is selected.

Changes
-------------
*) "checkbutton" modified so that "+" option always results in a
   checked button.

Bug Fixes
-------------
*) Fix "gpset" to ensure that window is updated.
*) Fix problem clearing "radiobutton" group values.
*) Fix "link" indent "-" option problem.
*) Fix gap in theme style border when text is null (Due to
   ::ttk::labelframe bug?)

WHAT IS GRIDPLUS:
====================

GRIDPLUS is a package intended to simplify GUI screen layout
development for Tcl/Tk programmers. It is a "Grid" based layout
system
which builds on, simplifies and extends the existing grid manager.
GRIDPLUS layouts are defined as a hierarchy of grids. Each cell in a
grid consists of two elements. These will usually be a text label and
some other widget such as an entry. It is also allowed to have just
one element in a cell, or a cell which is empty. GRIDPLUS grids can
also be stretched to neatly fill the cells in which they are
positioned.

While the GRIDPLUS grid can be used "native", GRIDPLUS commands/
options exist to create grids of Buttons, Checkbuttons, Date
selectors, Dropdowns (Comboboxes), Entries, Menubuttons, Links and
Radiobuttons. All places where text can be displayed make use of the
TCL message catalogue facility.

In effect GRIDPLUS is much more than an alternative to the grid
geometry manager, it provides most, if not all, of the facilities
required to build complete screens/windows. Although aimed at
producing data entry/update/display form screens for database
applications, it may be useful for other tasks.

GRIDPLUS also includes the following features:-

*) Scrollable text widget with support for tags.
*) Scrollable tablelist.
*) Scrollable tree.
*) Calendar style date display/selector.
*) Notebook widget.
*) Simple drop-down menus.
*) Simple method to specify widget traversal order when
   using the TAB key to navigate the screen.
*) A group facility to enable/disable groups of widgets
   and menu options.
*) Facility to include non-GRIDPLUS widgets in groups.
*) Simple pattern/procedure based entry validations.
*) Works with toplevel windows.
*) ...and much, much more!!