Bug 924

Summary: Mouseover problems when using MapTips widget on map layers with multi-polygon features
Product: Chameleon Reporter: Phil.Fong@ec.gc.ca
Component: WidgetAssignee: Paul Spencer <pspencer@dmsolutions.ca>
Status: RESOLVED FIXED    
Severity: minor CC: chameleon-dev@lists.maptools.org
Priority: P2    
Version: 2.0   
Target Milestone: 2.2   
Hardware: PC   
OS: Windows 2000   
Whiteboard:

Description From 2005-01-12 14:54:56 
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.
------- Comment #1 From 2005-01-13 07:37:03 ------- 
You are probably right.  For polygons, MapTips uses mapserver's template
processor with [shpxy] tags to get the feature coordinates.  Right now it
probably wraps the whole shape in an area tag, but it should probably be changed
to use part header/footer instead, then each polygon would come out in its own area.
------- Comment #2 From 2005-05-25 11:15:37 ------- 
I am pretty sure I have fixed this problem in 2.2 by adding pf and sf to the
template