[OpenLayers-Users] VisibilityChanged event handler

[Dmitri Mizerkin]

Thanks, Erik, I'll try it out!

Regards,
Dmitri

On 4/18/07, Erik Uzureau <erik.uzureau at metacarta.com> wrote:
>
> dmitri, since they are all overlays,
> I think you must work with the
>
> updateMap() function in layerswitcher.
>
> You can try something like this:
>
> OpenLayers.Control.LayerSwitcher.prototype._updateMap =
>     OpenLayers.Control.LayerSwitcher.prototype.updateMap;
> OpenLayers.Control.LayerSwitcher.prototype.updateMap =
>     function() {
>         this._updateMap();
>
>         //make your test, do your action
>     };
>
>
>
>
> On 4/18/07, Dmitri Mizerkin <eisberg at gmail.com> wrote:
> >
> > I'm afraid the "changebaselayer" event won't help me out, because all
> > the selectable layers I use are overlays.
> > So there's no way to do it, is there? Well, I'll look for a workaround,
> > but it would be great if this feature was in the newest release.
> >
> > Thanks anyway!
> >
> > Cheers,
> > Dmitri
> >
> > On 4/18/07, Schuyler Erle < sderle at metacarta.com> wrote:
> > >
> > > Dmitri, I think we would accept a patch for 2.5 if you or anyone else
> > > wanted to submit one for this.
> > >
> > > SDE
> > >
> > > On Wed, 2007-04-18 at 10:22 -0500, Erik Uzureau wrote:
> > > > Hi Dmitri,
> > > >
> > > > For right now the best solution I can think of is to listen for the
> > > > "changebaselayer" event on the map. When the user clicks a different
> > >
> > > > baselayer, this gets fired.
> > > >
> > > > Erik
> > > >
> > > >
> > > > On 4/18/07, Dmitri Mizerkin < eisberg at gmail.com> wrote:
> > > >         Hello List,
> > > >
> > > >         I am using layer pairs in my map, one of those for
> > > selection.
> > > >         I would like to remove the selection layer from the map as
> > > >         soon as the user removes the main layer using the layer
> > > >         switcher. Is it possible to register some
> > > "visibilityChanged"
> > > >         event handler, so that it calls a function as soon as its
> > > >         visibility parameter changes?
> > > >         It could be something like that:
> > > >
> > > >         layer.events.register("visibilityChanged", layer,
> > > function(e)
> > > >         {} );
> > > >
> > > >         Maybe there is some way to register the event in the layer
> > > >         switcher control as well, which could call the function as
> > > >         soon as it has changes?
> > > >
> > > >         Thanks in advance!
> > > >         Dmitri
> > > >         _______________________________________________
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> > > >         Users at openlayers.org
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> > > >
> > > >
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