[mapguide-trac] #1300: Chrome basic web layout and base layer, zooming in/out will make features disappear

[MapGuide Open Source]

#1300: Chrome basic web layout and base layer, zooming in/out will make features
disappear
-------------------------+--------------------------------------------------
 Reporter:  liuar        |         Owner:  liuar  
     Type:  defect       |        Status:  new    
 Priority:  medium       |     Milestone:         
Component:  AJAX Viewer  |       Version:  2.1.0  
 Severity:  major        |    Resolution:         
 Keywords:               |   External_id:  1311532
-------------------------+--------------------------------------------------
Comment (by liuar):

 Comments from Chris[[BR]]

 This appears to be a defect in the way Chrome caches images. It is
 possible to resolve the problem by making each tile request URL unique.
 This can be done by adding a timestamp parameter as shown below in the
 if(chrome) section.

 function RequestTile(col, row, tilex, tiley)
 {
 ...
 ...
         url = webAgent + "?OPERATION=GETTILEIMAGE&VERSION=1.2.0&SESSION="
 + sessionId + "&MAPDEFINITION=" + encodeComponent(mapDefinitionName) +
 "&BASEMAPLAYERGROUPNAME=" + encodeComponent(baseGroups[k]) + "&TILECOL=" +
 tilex + "&TILEROW=" + tiley + "&SCALEINDEX=" + sci + "&CLIENTAGENT=" +
 encodeComponent(clientAgent);
         if(chrome)
         {
             var timestamp = new Date().getTime();
             url += ('&TS=' + timestamp);
         }
 ...
 ...
 ...
 }

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Ticket URL: <https://trac.osgeo.org/mapguide/ticket/1300#comment:1>
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