Diego, we do exactly what you described in MapFish layer tree. Thx
2008/3/11, Diego Guidi <[EMAIL PROTECTED]>: > > I have one nearyly finished file > > > http://www.bnhelp.cz/wwwlibs/hslayers/hsAddons/Control/ExtLayerSwitcher.js > > I've modified this code to maintain only a display view with a layers > management a little bit different. > Background informations: > if someone publish different wms layers, foreach layer we need to > download a separate image or a different group of tiles: if I have one > WMS and i need to show more layers, it's better to play with WMS > LAYERS parameter to make a single request and obtain a single image > that merges all layers requested. > So I've used your code to introduce, for overlays only, a concept of > virtual layers: > all layers that are not baselayers are from a single OpenLayers.WMS > layer, but when i check/uncheck one or more of virtua layers, actually > a refresh of the WMS layer is launched, using a new LAYERS string as > WMS parameter. > It's not so easy to explain, but the code is more readable that my words ;) > This is not a real "component" - the code uses some global > variables... :( - butI hope that this is a basis to start :) > Thanks to Jachym for the code, and enjoy :) > Diego > _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users