#7876 HIGH 8.2.0 (: Double clicking an activity in the home ring causes 2 instances to launch

[Zarro Boogs per Child]

#7876: Double clicking an activity in the home ring causes 2 instances to launch
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   Reporter:  garycmartin  |       Owner:  tomeu                            
       Type:  defect       |      Status:  new                              
   Priority:  high         |   Milestone:  8.2.0 (was Update.2)             
  Component:  sugar        |     Version:  Development build as of this date
 Resolution:               |    Keywords:  blocks?:8.2.0 polish:8.2 r+      
Next_action:  diagnose     |    Verified:  0                                
  Blockedby:               |    Blocking:                                   
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Changes (by garycmartin):

  * next_action:  review => diagnose


Comment:

 Took some time to diagnose, but patch does not currently fix issue, sorry
 for the bad news. I've been using just 0001-7876-Dont-launch-multiple-
 instances-on-double-click.patch in my test/diagnose cycles (joyride-2301
 XO B4).

 Double, triple... quintuple clicks et al still all get through and launch
 multiple activity instances. The additional incoming clicks, after the
 first, appear to be delayed until after the launchwindow** has appeared.
 Any additional click arrival times (however quickly made) are recorded
 well past the _CLICK_DELAY = 1 sec setting. Through trial and error,
 bumping _CLICK_DELAY up to 4 seems to be long enough to block additional
 delayed click events, though that's rather a large sledge hammer approach.

 **I'm not sure of the detail regarding event loop processing, so it's only
 a guess that the launchwindow might be delaying additional clicks after
 the first, could well be some other part of event loop processing.

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Ticket URL: <http://dev.laptop.org/ticket/7876#comment:21>
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