[OpenLayers-Users] How to unselect layers in layerswitcher and save in variable only the selected ones

[Lauri Kajan]

Hi Gery,

Could you just use:
var visiblelayers = map.getLayersBy("visibility", true);

That method returns a list of layers with properties matching the given
criteria.

-Lauri



On Thu, Feb 21, 2013 at 12:13 AM, Gery . <gamejihou at hotmail.com> wrote:

> Hello folks,
>
> Thanks to Richard Greenwood, this function shows which layer is unselected in the layerswitcher control.
>
> map.events.register('changelayer', null, function(evt){
>        if(evt.property === "visibility") {
>           alert(evt.layer.name + " layer visibility changed to " + evt.layer.visibility );
>        }
> });
>
> I'm wondering how I can save in a variable array the unselected layers.
> For instance I have layers "a", "b", "c" in the layerswitcher, so "a" is
> unselected and I want "b" and "c" saved in an array like myarray = [b,c].
> Then, I can loop over this array to do some processes calling only layers
> "b" and "c".
>
> I'll appreciate some ideas about this, thanks in advance,
>
> Gery
>
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