Thank you Matt for your reply,
The code comes from the OpenLayers example : http://openlayers.org/dev/examples/wmc.html So I do wmcFormat = new OpenLayers.Format.WMC(); to write and read contexts. What I need, as you said, is to change the options of my map with the parameters of the context (BoundingBox, ZoomLevel, layers visible or not ). I dont want to merge the result like the openlayers example. The problem is that wmcFormat.read(context, {map: mapOptions}) returns a map. So when I do map.setOptions(wmcFormat.read(context,{map:mapOptions}); nothing happens. The result is that I need to know the map options contained in my context but I only access to a map with the wmcFormat. Do I have to extract the informations from the context (XML format) to set the options and refresh all GeoExt widgets by myself ? Best Regards Arno De : Matt Priour [mailto:mpri...@kestrelcomputer.com] Envoyé : lundi 9 janvier 2012 17:42 À : Arnaud Jean-Charles Cc : 'Users' Objet : Re: [Users] MapPanel refresh after a wmcFormat.read() I'm not sure what exactly you are trying to do, but I can assure you that you are doing wrong. map.destroy(); NO! Never destroy the map unless you want it really and truly gone for good. var jsonFormat = new OpenLayers.Format.JSON(); var mapOptions = jsonFormat.read('{"allOverlays": true}'); OL.Format.JSON is for reading JSON "encoded" vector features into a layer. You do NOT need this to simply set options. mapOptions = {allOverlays:true}; instead of the 2 lines and quoted strings you have used. However, again, you should only be setting that once and creating the map once, NOT attempting to fully destroy the map and recreate it everytime you want to read or refresh a data source. map = wmcFormat.read(context, {map: mapOptions}); Instead of this you should use: map.setOptions(wmcFormat.read(context,{map:mapOptions}); The FireFox error is : layers is null in MapPanel.js (ligne 301) And do I have to re-build all the GeoExt widgets (ScaleStore, LegendPanel, OverviewMap ) which are bind to my map ?? Thanks for the help Arno _______________________________________________ Users mailing list <mailto:Users@geoext.org> Users@geoext.org <http://www.geoext.org/cgi-bin/mailman/listinfo/users> http://www.geoext.org/cgi-bin/mailman/listinfo/users
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