[Trac #732] Activities donut should rotate with alt-tab

[Zarro Boogs per Child]

#732: Activities donut should rotate with alt-tab
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 Reporter:  ywwg         |       Owner:  ywwg   
     Type:  enhancement  |      Status:  new    
 Priority:  normal       |   Milestone:  BTest-3
Component:  sugar        |    Keywords:         
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 Marco and I have been working on the activities donut to create the
 following behavior:

 * the current activity should always be at the bottom of the donut
 * when pressing alt-tab, the donut should rotate to place possible new
 current activities at the bottom.

 Back around the build 193 days, I had this working almost completely.  The
 biggest bug was that if the user pressed and released alt-tab too quickly,
 the homewindow wouldn't see the release event and wouldn't select the next
 activity.  It would be nice if someone who really knew X and GTK could
 help me to correctly hook up to alt-tab press and release events.

 I'm attaching the current version of the rotation code.  There is no alt-
 tab code yet.  Animation is also currently disabled ("1 frame per
 rotation") pending performance work.

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Ticket URL: <http://dev.laptop.org/ticket/732>
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