[mapguide-trac] #24: Fix some bugs in the ResizeBox symbolization code

[MapGuide Open Source]

#24: Fix some bugs in the ResizeBox symbolization code
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   Reporter:  waltweltonlair  |       Owner:  waltweltonlair
       Type:  defect          |      Status:  new           
   Priority:  high            |   Milestone:  1.2           
  Component:  Server          |     Version:  1.2.0         
   Severity:  major           |    Keywords:                
External_id:  924135          |  
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 The symbolization code wasn't correctly handling the case of an off-center
 resize box, nor was it updating the resize box correctly in the case where
 the symbol definition had multiple graphic elements being added to the
 resize box.

 The new code is also simpler.
 * we get the initial resize box extents and store them for reference
 * we then add the bounds of all graphic elements with resize control set
 to AddToResizeBox to a copy of these extents
 * now that we have the original resize box and the updated resize box, we
 can easily compute the scales / translations to be applied
 * all graphic elements with resize control set to AdjustToResizeBox are
 then transformed using the scales / translations

 I also changed the boolean SE_RenderPrimitive::resize member to an
 enumerated type.  This way we only have to evaluate the resizeControl
 parameter one time.

 I tested the updated code with polylines, polygons, text, and raster
 elements.  I used an off-center resize box, and tried all the different
 GrowControl options.

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/24>
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