[QGIS-trac] [Quantum GIS] #1262: Point and Multipoint symbols are not drawn centered at location

[Quantum GIS]

#1262: Point and Multipoint symbols are not drawn centered at location
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   Reporter:  smizuno                           |              Owner:  nobody       
       Type:  bug                               |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.0.0
  Component:  Marker Symbols                    |            Version:  HEAD         
   Keywords:                                    |   Platform_version:               
   Platform:  All                               |           Must_fix:  No           
Status_info:  0                                 |  
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 Point symbols are drawn approximately 2 pixels left and up from where they
 should be. I'm not quite sure of the amount, due to rounding errors in
 calculating the display location.

 Multipoint symbols are drawn with the upper left corner of the symbol at
 the location of the point.

 Expect that the symbol center would be at the point location.

 This causes some frustration when using Identify, especially if the Search
 Radius is less than 0.5% or so.

 attached is a 16x extract from a screen shot of examples - the blue square
 symbol is a POINT, the magenta square is a MULTIPOINT, three dark magenta
 lines start at the location the two point types are located at. I painted
 a black pixel at that location for reference. Also shown is an Identify
 highlight for the point/multipoint (both get the highlight as shown)
 centered at the location as expected.

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Ticket URL: <http://trac.osgeo.org/qgis/ticket/1262>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats