[Chameleon-dev] [Bug 924] New: Mouseover problems when using MapTips widget on map layers with multi-polygon features

[bugzilla-daemon at maptools.org]

http://www.maptools.org/bugzilla/show_bug.cgi?id=924

           Summary: Mouseover problems when using MapTips widget on map
                    layers with multi-polygon features
           Product: Chameleon
           Version: 1.99
          Platform: PC
        OS/Version: Windows 2000
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Widget
        AssignedTo: chameleon-dev at lists.maptools.org
        ReportedBy: Phil.Fong at ec.gc.ca


There seems to be a problem sometimes when using the MapTips widget on map
layers that have features which consist of more than 1 polygon. In the web
browser when the mouse passes over a feature made up of more than 1 polygon,
there can be places where the browser thinks is outside of the polygon (and no
maptips is shown) but in fact is inside. So, as the mouse moves around inside
the polygon, the maptip switches between being shown and being hidden. This
behaviour was discovered when applying MapTips on a world layer of the country
boundaries.

Looking at the html source reveals that each feature is converted into a single
<AREA> element even if the feature consists of multi-polygons (the coordinates
of each polygon are just appended after one another). I believe that the AREA
element requires that the coordinates make up a single polygon and this is why I
think the above problems are happening.



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