[fusion-trac] #550: TaskPane-based widgets leave dangling digitizers when Task Pane is hidden

[Fusion]

#550: TaskPane-based widgets leave dangling digitizers when Task Pane is hidden
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   Reporter:  jng     |       Owner:  jng   
       Type:  defect  |      Status:  new   
   Priority:  P2      |   Milestone:  Future
  Component:  Core    |     Version:  2.0   
   Severity:  Major   |    Keywords:        
External_id:          |       State:  New   
    Browser:  All     |          Os:  All   
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 The measure widget and any TaskPane-based widget have really bad usability
 with regards to what happens when the Task Pane is hidden.

 When the Task Pane that the widget resides in is hidden, the widget itself
 is still internally active and the viewer is still accepting mouse input
 for digitization.

 We need a mechanism by which such widgets can be notified when the Task
 Pane is hidden and shown, so that such widgets can then act appropriately.

 Current thinking is when the Task Pane is hidden, such widgets are
 notified and their default action is to instruct the Task Pane to go home
 and to activate the default widget (Zoom?). Will need some more discussion
 on this matter.

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Ticket URL: <http://trac.osgeo.org/fusion/ticket/550>
Fusion <http://trac.osgeo.org/fusion>
Fusion is a web-mapping application development framework for MapServer and MapGuide OS.