Hi Just I have looked at applying your modifications to GeoExt but have not managed it.
Are you planning to add it to the GeoExt GitHub and if not could you possibly help with the code that needs to be altered in LegendPanel.js? Many thanks Tom -----Original Message----- From: users-boun...@geoext.org [mailto:users-boun...@geoext.org] On Behalf Of Just van den Broecke Sent: 24 May 2012 09:56 To: users@geoext.org Subject: Re: [Users] LegendPanel fires GetLegendGraphic requests for invisible Layers Hi, I got much further in nailing down the issue: GeoExt will prefetch/preload Legends, WMS Legends via GetLegendGraphic, for all Layers where the "hideInLegend" record item is false/undefined, thus even if the Layer is not visible. I have fixed this and made this behaviour configurable via a "prefetchLegends" property for my class that derives from GeoExt LegendPanel. Also "hideInLegend" gets set in a Layer record when set for a Layer. See the code at: http://code.google.com/p/geoext-viewer/source/browse/trunk/heron/lib/wid gets/LayerLegendPanel.js (Heron MC is a framework on top of GeoExt). Maybe the fix can be cleaned some, but for now this works. If found useful I may add this fix/feature to GeoExt via GitHub pull. best, --Just Just van den Broecke The Netherlands www.justobjects.nl On 22-05-12 19:48, Just van den Broecke wrote: > Hi, > > Another Legend issue, on GeoExt 1.1/OpenLayers 2.11: > > When I add a LegendPanel to a Container, GetLegendGraphic requests are > issued for every WMS Layer, even if these Layers are initially > invisible. Basically the same issue as described here: > http://lists.osgeo.org/pipermail/geoprisma-dev/2010-October/000487.htm > l For maps with many layers this gives quite some init delay. > > I would like to show/hide legends dynamically, only for Layers that > become visible/invisible, possibly as a configurable option > ("showVisibleLayersOnly") on LegendPanel. I could not find an open > issue or maybe there is a workaround. Thanks for any suggestions. > Best, > > --Just > > Just van den Broecke > The Netherlands > www.justobjects.nl > > > > > > _______________________________________________ > Users mailing list > Users@geoext.org > http://www.geoext.org/cgi-bin/mailman/listinfo/users > _______________________________________________ Users mailing list Users@geoext.org http://www.geoext.org/cgi-bin/mailman/listinfo/users _______________________________________________ Users mailing list Users@geoext.org http://www.geoext.org/cgi-bin/mailman/listinfo/users
