Summary

widgets ::= [macros] element+

element ::= widget_type [options] [element+] .

options ::= equate+
macros ::= equate+

equate ::= something = something
               -or-
           something = "some string"

Details

• a widget spec consists of an optional set of macros and one or more child elements
• an element consists of:
• a widget_type (one of the Tkinter standard widgets, i.e. Text, Label, Button, etc...)
• an optional set of options for the widget.
• an optional set of child elements for the widget (this only makes sense for Frame widgets though.)
• a trailing dot .
• both options and macros consist of one or more equates
• equates are either:
• thing = thing
• thing = "quoted string"

Additionally

widget_types are case-INsensitive; macros are substituted for values of equates in each element; whitespace is not syntactically significant, you can indent your text as you like, you can even put things all on one line...

Any options from the grid layout manager can be included and they'll be picked out and applied to the widget's gridding.

See the demos (included in the source) for more info.