[Mapguide-trac] [mapguide-trac] #2096: mg-desktop: Improve MgLegend performance

[MapGuide Open Source]

#2096: mg-desktop: Improve MgLegend performance
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   Reporter:  jng          |       Owner:  jng
       Type:  defect       |      Status:  new
   Priority:  high         |   Milestone:  2.4
  Component:  Desktop API  |     Version:     
   Severity:  major        |    Keywords:     
External_id:               |  
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Description changed by jng:

Old description:

> The MgLegend component does not currently handle large maps very well
> (with 100s of layers). This is because of primarily 2 things:
>
>  1. We are excessively doing work on the GUI thread, which is a bad thing
> for large maps.
>  2. We are also not caching layer icons

New description:

 The MgLegend component does not currently handle large maps very well
 (with 100s of layers). This is because of primarily 2 things:

  1. We are excessively doing work on the GUI thread, which is a bad thing
 for large maps.
  2. We are also not caching layer icons

 We should re-use the existing tree/legend modelling, initialization and
 updating logic from the .net AJAX viewer.

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/2096#comment:1>
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