I've translated my fancy OpenLaszlo pie menu component to
Python/gtk/cairo, so they work with the OLPC Sugar user interface!
These pie menus have an adaptive layout algorithm, that support linear
menus which can lay out in all four directions, pie menus, and hybrid
pie/linear menus (automatically limiting the number of pie items to 8,
and formatting overflow items in as linear menu items below the pie).
I'm just learning pygtk, so they aren't as integrated or as fleshed out
as they should be yet, and they don't actually do anything but print
debugging messages so far, but this is a good first cut that's demoable.
I like the cairo drawing module! It's easy to use, and the graphics and
feedback highlighting looks nice.
It's all written in one file of Python code.
You should be able to run the demo, which is included in the file, just
by going "python piemenu.py" on an OLPC or Python system with pytgk and
cairo installed.
I'd really appreciate it if anyone who knows pygtk would look at the
code and give me some feedback about what I'm doing wrong and how to
improve them, please.
Next I have to flesh out input tracking and notification, and figure out
how to send events during tracking when they pop up, the mouse moves,
item changes, when items are selected, sub menus are selected, etc.
And then of course there's a some frosting to implement like keyboard
navigation, submenu browsing, screen edge handling, accessibility, popup
animation, titles, tooltips, icons, shaped windows, disabled items, etc.
Also I'd like to integrate them with glade and the persistence stuff so
you can load them in from xml files, edit them with a property sheet,
and even edit live menus with direct manipulation, etc.
Here is the source code (which is GPL):
http://www.donhopkins.com/home/piemenu.py
I've uploaded a picture here:
http://www.donhopkins.com/home/pygtk-piemenu.png
-Don
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