[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:           
  Component:  General      |     Version:  2.2.0    
   Severity:  trivial      |    Keywords:  selection
External_id:               |  
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Comment(by jng):

 The ideal solution (whatever that may be. I haven't put much thought into
 it) is one that requires no roundtrips back to the MapGuide server for
 extra information.  Whatever is returned by
 getselectedfeatures.aspx/php.jsp should provide sufficient information to
 render sub-selected features.

 Keep in mind that the selection that you see in the viewer is a dumb image
 returned by the MapGuide Server. To change the selection color for the
 subselected feature in the naively classical sense, would require another
 roundtrip to the MapGuide Server for the new selection image. This is
 woefully inefficient.

 So in terms of showing a sub-selected feature, the best bet is to put a
 client-side marker (eg. A css-styled div) of some sort on top of the
 feature in question, that moves when panning and zooming and is cleared
 when either the selection is cleared or a different selected feature is
 sub-selected.

-- 
Ticket URL: <http://trac.osgeo.org/mapguide/ticket/1637#comment:1>
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