PIEMNU20.TBK - by Paolo Tosolini  October '92
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This is an Asymetrix Toolbook v. 1.5 file.

PIEMNU20.TBK is a considerable upgrade to v. 1.0, first implementation
of the idea of the Pie Menu using the openscript language of Toolbook. 

The improvements consist of:

- new eye-catching look of the PieMenu
- opportunity to navigate through the pages of the book without ever 
  showing the PieMenu
- opportunity to navigate through the pages of the book showing the
  PieMenu on keeping pressed the mouseButton.
- increased speed of the PieMenu appearance
- increased feedback to the user through displaying of his action

The book contains all the instruction to apply the Pie Menu in
your own application. No fee or money is absolutely required.

Suggestions and new ideas are welcome. Let's try togheter to
improve Toolbook's application interfaces.

Other ideas will be implemented in further releases of PieMenu.
Please, email your opinion, and you will be kept updated directly
of new coming versions.

	Paolo Tosolini
	tosolini@uts340.univ.trieste.it
	
	via Bembo, 5  34015 Muggia (TS)
	Italy
	tel. +39 40 275030
	fax. +39 40 311850


Special thanks to:

- Rodrigo Botafogo of NEC C&C Laboratories, Tokyo
- Gordon Kurtenbach of University of Toronto, Canada 

for the precious help and discussions.


REFERENCES:

[  Callahan J., Hopkins D., Weiser M.,  Shneiderman B. (1988)
"An empirical comparison of Pie versus Linear Menus", 
Proceedings of CHI' 88 ]

[ Kurtenbach P.G., Sellen A. J. e Buxton W. A. S. (1992) ,
" An Empirical Evaluation of some Articulatory and Cognitive Aspects 
of Marking Menus", to print on HCI January 1993 ]