[Mapguide-trac] [mapguide-trac] #1637: Show Current Selection of a Multiple Feature Selection

[MapGuide Open Source]

#1637: Show Current Selection of a Multiple Feature Selection
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   Reporter:  steveg       |       Owner:           
       Type:  enhancement  |      Status:  new      
   Priority:  low          |   Milestone:  3.1      
  Component:  General      |     Version:  2.2.0    
   Severity:  trivial      |    Keywords:  selection
External_id:               |  
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Changes (by jng):

  * milestone:  => 3.1


Comment:

 Now that QUERYMAPFEATURES for all intents and purposes works as originally
 designed (there has been many design/implementation defects), I've got an
 easy idea on how to do this. We can implement sub-selections as renderings
 of transient (temporary) selections.

 We can render transient selections by simply issuing a v2.6.0
 QUERYMAPFEATURES with PERSIST=0 and with a different selection color,
 sending up the selection XML fragment of the current feature and require
 an inline selection image as part of the response, which we can then
 overlay on top of the current map image.

 We can send this request on any change of map view or change of active
 feature in the property palette. However, because it is transient it means
 that if you plot the map there will be no active sub-selection included as
 we never persist that active sub-selection server-side.

 How does that sound?

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/1637#comment:2>
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