Hello all,
I have an application developed with Ext / GeoExt / OpenLayers, and two
OpenLayers maps (within two different tabs). The zooms and centers of
these two maps objects are synchronised with listeners.
My first map is the main map, with all the layers, gathered in a GeoExt
layertree : base layers, WMS, WFS... The second map object has only a
base layer (for now). These two maps aren't displayed at the same time
side by side, but only the first or the second map; depending on the
active tab (Ext TabPanel).
When displaying map2, I try to clone a WFS layer from map1, and add it
to this new map. If the WFS layer is visible in map1 while changing the
tab, the clone() function creates a new layer which will always be
visible (I haven't any LayerTree for map2). If I go back to map1 and
deactivate the WFS layer, the clone layer is still visible in map2. But
that's not what I want...
If I get it right, the clone() function creates a second layer with the
same configuration, the same features, etc, than the original layer when
cloning. So the number of features is doubled.
The second test I made is adding to map2 the existing WFS layer with:
/tab.map.addLayers([_vess_wfs]);/
rather than...
/tab.map.addLayers([_vess_wfs.clone()]);/
With this code, map2 doesn't display this layer, but Firebug says that
map2 has the layer...
What I want is that my two maps use the same layer, so that the feature
number isn't doubled within my web browser, and the layer's attributes
are the same in both maps (visibility, filter, etc...). Does OpenLayers
offers some functionalities to do so? Can I create two maps with common
layer objects, without doubling the weight of it?
I thank you for your advice!
Gabriel
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