Layers moving after a setVisibility() [#820476]

Hi all, I have to display near to 40 layers on a map so I couldn't use the layer switcher because there is no scroll. I add a javascript tree to the page and when a layer is checked in the tree, I do a setVisibility(true) to the concern layer. The problem is after that layers are not moving at the same speed than the baseLayer. I tried using the layer switcher (even if I can't select all the layers) and it works there is no problem. So can you help me? Is the layer switcher doing more than a setVisibility?

PS : I tried to use the open layers mailing list but I have no response.

Comments

Comment #1

zzolo CreditAttribution: zzolo commented 7 June 2010 at 13:43

The OpenLayers examples are pretty good. Not sure if there is one that does exactly what you want:
http://openlayers.org/dev/examples/
http://openlayers.org/dev/examples/layerswitcher.html

Either way, you'll have to create a new behavior for this. You might want to look at Managing News as well, since there is a custom layer switcher in there, I believe.
http://managingnews.com/

Comment #2

sebgranel CreditAttribution: sebgranel commented 7 June 2010 at 14:01

The only thing I want is to be able to switch On/Off Layers (what layer switcher exactly do) but with 40 layers the layer switcher is more than 900px height so some layers are impossible to enable. Finally I use dynatree to switch between layers but the setVisibility method seem to cause a bug and I wanted to know what layerswitcher do to use that instead of setVisibility.

Comment #3

tmcw CreditAttribution: tmcw commented 7 June 2010 at 14:06

LayerSwitcher only calls setVisibility as far as I can see. You will run into weird cases if your LayerSwitcher replacement calls setVisibility or remove on all layers except those checked - there's an invisible Vector.RootContainer layer added to all maps with multiple Vector layers, and if removed, it'll cause very odd map behavior.