[OpenLayers-Users] How to - severable clickable WFS layers ?
Christopher Schmidt
crschmidt at metacarta.com
Wed Jun 10 07:37:45 EDT 2009
On Wed, Jun 10, 2009 at 01:11:27PM +0200, Asle Benoni wrote:
> Hello,
> I try to specify the layer array like this "map.layers[2,3,4,5]" but that
> does not work. Is this correct?
This is not corect Javascript syntax in any way that I'm aware of.
-- Chris
> I always get popups only on the last layer I
> have specified. Is my way of specifying the layers array correct? How do I
> check what version of OpenLayers I have?
> A lot of questions! Thanks.
>
> /asle
>
> 2009/6/8 Asle Benoni <asle.benoni at gmail.com>
>
> > Thanks! Sure enough I was mixing in other layers.
> > I chose only the WFS layers now but I am only able to click on the last
> > layer that is listed. If I put "map.layers[2,3,4]", I get popups for layer 4
> > but no one else.
> >
> > selectControl = new
> > OpenLayers.Control.SelectFeature(map.layers[2,3,4,5],{onSelect:
> > onFeatureSelect, onUnselect: onFeatureUnselect});
> > map.addControl(selectControl);
> > selectControl.activate();
> > function onPopupClose(evt) {
> > selectControl.unselect(selectedFeature);
> > }
> >
> > I wonder if this is a good approach for what I want to accomplish? I looked
> > at this example which uses OpenLayers switch features.
> >
> > http://gis.ibbeck.de/ginfo/apps/OLExamples/OL26/examples/styles_unique_with_group.html
> >
> > I would else have to hide a layer when another is shown since users would
> > not understand why every marker in all visible layers are not clickable.
> >
> > Thanks for any input!!
> >
> > /asle
> >
> > 2009/6/8 Christopher Schmidt <crschmidt at metacarta.com>
> >
> > On Mon, Jun 08, 2009 at 03:59:03PM +0200, Asle Benoni wrote:
> >> > Hi,
> >> > I just wonder how I know if I have OpenLayers 2.8? I have downloaded
> >> from
> >> > trunk but the date for OpenLayers.js is 31.03.2009. Or do I have to grab
> >> > some special files. *map.layers* is my arrayname?
> >> >
> >> > I tried your suggestion but when I write:
> >> > selectControl = new
> >> OpenLayers.Control.SelectFeature(*map.layers*,{onSelect:
> >> > onFeatureSelect, onUnselect: onFeatureUnselect});
> >> > map.addControl(selectControl);
> >> > selectControl.activate();
> >> > function onPopupClose(evt) {
> >> > selectControl.unselect(selectedFeature);
> >> > }
> >> > I get this error in Firebug and the page is blank:
> >> > *layer.renderer is undefined
> >> > *
> >> > Does this mean I am still using too old OpenLayers.js?
> >>
> >> No. It means you have passed in one or more layers in your array that
> >> are *not* vector layers.
> >>
> >> -- Chris
> >>
> >> > /asle
> >> > 2009/6/8 Eric Lemoine <eric.lemoine at camptocamp.com>
> >> >
> >> > > On Sunday, June 7, 2009, Asle Benoni <asle.benoni at gmail.com> wrote:
> >> > > > Hello,
> >> > > > I have a map using a MapFish framework but I think this must be a
> >> > > OpenLayers question.
> >> > > > I have several WFS layers from GeoServer where I use the attributes
> >> to
> >> > > fill the popup. Only problem is that I can only click on markers in
> >> one
> >> > > layer at a time. The user sees all the layers, some buildings, another
> >> layer
> >> > > with churches etc. but can only click on on layer. How do I solve
> >> this? I
> >> > > have now one layer for each type of buildings and I want to be able to
> >> turn
> >> > > on and off different buildings so that is why they are in separate
> >> layers.
> >> > > Is it possible to still use many layers and bee able to click on
> >> popups from
> >> > > different layers. Or is my approach unnecessary difficult? Glad for
> >> any
> >> > > help!
> >> > > >
> >> > > > I use this for the WFS layer:
> >> > > >
> >> > > > createWfsLayer(
> >> > > > "Teknisk industri",
> >> > > > "
> >> > >
> >> http://naturkart.no:8080/geoserver/wfs?SERVICE=WFS&VERSION=1.0.0&REQUEST=GetFeature&SRS=EPSG%3A32633&BBOX=40484.8125,6401353.125,760135.8125,6687724.125
> >> ",
> >> > > {
> >> > > > typename:
> >> "kulturminner_ns:tekniskindustrielt",
> >> > > > srsName: "EPSG:32633",
> >> > > > maxfeatures: 200},{
> >> > > > extractAttributes:true,
> >> > > > visibility:false
> >> > > > }
> >> > > > );
> >> > > >
> >> > > > ...same code for each layer....
> >> > > >
> >> > > > // Popup code, define for each layer with markers:
> >> > > > selectControl = new
> >> > > OpenLayers.Control.SelectFeature(map.layers[0],{onSelect:
> >> onFeatureSelect,
> >> > > onUnselect: onFeatureUnselect});
> >> > > > map.addControl(selectControl);
> >> > > > selectControl.activate();
> >> > > > function onPopupClose(evt) {
> >> > > > selectControl1.unselect(selectedFeature);
> >> > > > }
> >> > > > selectControl1 = new
> >> > > OpenLayers.Control.SelectFeature(map.layers[1],{onSelect:
> >> onFeatureSelect,
> >> > > onUnselect: onFeatureUnselect});
> >> > > > map.addControl(selectControl1);
> >> > > > selectControl1.activate();
> >> > > > function onPopupClose(evt) {
> >> > > > selectControl1.unselect(selectedFeature);
> >> > > > }
> >> > > > // etc...... for every layer with marker
> >> > >
> >> > > Instead of creating one select control for each layer create only one
> >> > > and give it all the layers:
> >> > >
> >> > > sc = new OpenLayers.Control.SelectFeature(array_of_layers, {...});
> >> > >
> >> > > you'll need OL 2.8 for this (or trunk)
> >> > >
> >> > > Cheers,
> >> > >
> >> > >
> >> > > > // Now the popup functions used:
> >> > > >
> >> > > > function onFeatureSelect(feature) {
> >> > > > selectedFeature = feature;
> >> > > > popup = new OpenLayers.Popup.FramedCloud("chicken",
> >> > > >
> >> > > feature.geometry.getBounds().getCenterLonLat(),
> >> > > > new OpenLayers.Size(100,200),
> >> > > > "<h2>" +feature.attributes.gardsnavn +
> >> > > > "</h2>Type: "+ feature.attributes.art +
> >> > > > "<br />Kommune: "+ feature.attributes.komm +
> >> > > > "<br />Beskrivelse<br /><a href='" +
> >> > > feature.attributes.urltilpdfark +
> >> > > > "' target=blank><img src='
> >> > > http://naturkart.no:8080/geoserver/images/logo.png' border='0'
> >> > > alt='naturkart'></a>", null, true, onPopupClose);
> >> > > > feature.popup = popup;
> >> > > > map.addPopup(popup);
> >> > > > }
> >> > > > function onFeatureUnselect(feature) {
> >> > > > map.removePopup(feature.popup);
> >> > > > feature.popup.destroy();
> >> > > > feature.popup = null;
> >> > > > }
> >> > > >
> >> > > >
> >> > > >
> >> > >
> >> > > --
> >> > > Eric Lemoine
> >> > >
> >> > > Camptocamp France SAS
> >> > > Savoie Technolac, BP 352
> >> > > 73377 Le Bourget du Lac, Cedex
> >> > >
> >> > > Tel : 00 33 4 79 44 44 96
> >> > > Mail : eric.lemoine at camptocamp.com
> >> > > http://www.camptocamp.com
> >> > >
> >>
> >> > _______________________________________________
> >> > Users mailing list
> >> > Users at openlayers.org
> >> > http://openlayers.org/mailman/listinfo/users
> >>
> >>
> >> --
> >> Christopher Schmidt
> >> MetaCarta
> >>
> >
> >
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--
Christopher Schmidt
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