Hi Ivan, Here's my thoughts on that topic :
Like you said, I also did something similar. I had 4 different data sources that were normalized and had to use 4 Vector layers with "moveend" events to automatically switch from one to an other. What I though to be 'a bad idea' was to have 4 layers (all of the same kind, i.e. Vector) for a slight difference. That's why the OptionByZoom Strategy I then made (1) was better. What you're seeking to do is different. Switching from a WMS layer to a Vector layer can't be done by 'switching properties' of one layer. IMHO, you currently can't avoid having multiple layers for that, so your idea of a 'container' could be good. That doesn't need to be much complicated. You could have a dummy layer with inLayerSwitcher: true that could be your container for other layers. It could have properties/features like: layers (the layers to have together) currentLayer (set on each "moveend" events of layers) setCurrentLayer() (set the current inRange layer from layers, only one should be inRange at a time) addLayer() (automatic map.addLayer, "moveend" event registration to setCurrentLayer, etc.) and added layers should have min/max Scale/Resolution properties to have unique ranges. What do you think ? Alexandre (1) http://dev4.mapgears.com/bdga/options-by-zoom-bdga.html Ivan Grcic wrote: > Hi devs, > > I want to ask if anyone has made something like Vector/RootContainer, > a layer that would contain several layers, and every layer would > activate/deactivate on different zoomLevels. > > Simple case: 3 (or more) layers combined in one ContainerLayer > small scale: WMS raster layer > larger scales: other WMS raster layer > large scale: WFS vector layer > > Usually I always register zoomend event on map, and manually activate > or deactivate layers...but it got little bit boring to do that on > application level every time. > > I remember Alexandre did something like that but for Vector layer > or http://openlayers.org/pipermail/users/2009-January/009666.html > > Anyone did something like that? (does mapfish maybe has soemthing like that) > If not, can anyone just give few tips, so I could start developing it... > > Tnx&Cheers, > > > -- Alexandre Dubé Mapgears www.mapgears.com _______________________________________________ Dev mailing list Dev@openlayers.org http://openlayers.org/mailman/listinfo/dev
