PIEMNU25.TBK - by Paolo Tosolini  October '92
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This is an Asymetrix Toolbook v. 1.5 file.

PIEMNU25.TBK improves usability of the PieMenu for programmers who
like the idea and want to adopt it.

I remember the improvements from v. 1.0 to 2.0 that still remain:

- 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

From v. 2.0 to this one (v. 2.5) I modified:

- use of the RIGHTmouseButton (not LEFT one anymore) for the PieMenu:
  this is to avoid conflicts with hotwords in the same page.
- presence of one (hidden) copy of the PieMenu group on every background 
  instead of each page. The menu is self copying while
  turning the page.
- no more flickering on the commands of the Pie.

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 
- Olaf Winkelhake of University of Passau, Germany

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 Journal HCI January 1993 ]