Alex,
Instead of defining the externalGraphic property directly in your
StyleMap (that affects all your features on your layer), you could
register a "featureadded" event to your DrawFeature control for points
and set the externalGraphic property there. You would need to redraw
your feature to affect the new style. This might look like (untested) :
var oDrawPoint = new OpenLayers.Control.DrawFeature(vectors,
OpenLayers.Handler.Point);
oDrawPoint.events.on({"featureadded": onPointFeatureAdded, scope:
oDrawPoint});
var onPointFeatureAdded = function(event) {
var feature = event.feature;
var symbolizer = this.layer.styleMap.createSymbolizer(feature);
feature.style = symbolizer;
feature.style.externalGraphic = "images/markers/marker-gold.png";
feature.style.pointRadius = 10;
this.layer.drawFeature(feature);
};
The remaining thing to do is to think about how to have different
markers for your features.
Hope this helps,
Alexandre
Alex G. wrote:
> Alexandre,
>
> thanks again for your valuable help!
>
> At the moment the best idea would be to have vector points as markers,
> which would make them both clickable and perfect for what I need to do.
>
> I have added this info to the vector layer:
>
> vectors = new OpenLayers.Layer.Vector('Vectors', {
> styleMap: new OpenLayers.StyleMap({
> externalGraphic: "images/markers/marker-gold.png",
> pointRadius: 10
> })
> });
>
> And the point appears correctly with the marker icon. But I have run
> into 2 problems now:
>
> 1) All my polygons and lines appear black or invisible
> 2) I would like to use more than one image for the markers
>
> My controls looks like this:
>
> controls = {
> point: new OpenLayers.Control.DrawFeature(vectors,
> OpenLayers.Handler.Point),
> line: new OpenLayers.Control.DrawFeature(vectors,
> OpenLayers.Handler.Path),
> polygon: new OpenLayers.Control.DrawFeature(vectors,
> OpenLayers.Handler.Polygon),
> drag: new OpenLayers.Control.DragFeature(vectors),
> select: selectControl
> };
>
> Is there a way to maybe pass the external image specifically to the
> "point" control?
>
> I am unsure about the syntax and I wasn't able to find any info
> around, maybe something like this:
>
> point: new OpenLayers.Control.DrawFeature(vectors,
> OpenLayers.Handler.Point, {style: blah blah}),
>
> If it's possible, then that solves my 2nd problem as well for
> different images.
>
> Thanks in advance!
>
> Best regards,
>
> Alex
>
> On Thu, Feb 4, 2010 at 8:26 PM, Alexandre Dube <ad...@mapgears.com
> <mailto:ad...@mapgears.com>> wrote:
>
> Alex,
>
> Take a look at this example [1]. Vector features can be used
> with a SelectFeature control to open popups. You only need to
> define the externalGraphic to have images and define the geometry
> type to "point". See an other example of "draw" types.
>
> You might be interested to take a look at this example [3] too
> (it's a development sandbox for a RedLining widget in GeoExt). It
> uses a lot of OpenLayers components to draw/select the features.
> Maybe that can helps too.
>
> Kind regards,
>
> Alexandre
>
> [1] http://openlayers.org/dev/examples/select-feature-openpopup.html
> [2] http://openlayers.org/dev/examples/draw-feature.html
> [3]
>
> http://dev.geoext.org/sandbox/redlining/ux/FeatureEditing/examples/ControlerOnlyExample.html
>
>
> Alex G. wrote:
>
> Alexandre,
>
> thanks for your thoughts. Although if I understand what you're
> saying and the example correctly, this will not make the
> markers to pop up with bubbles where I can put text.
>
> I am currently placing markers with text on them where if you
> click on the marker a little bubble will appear.
>
> Here's another snippet that I forgot to include:
>
> var click = new OpenLayers.Control.Click();
> map.addControl(click);
> click.activate();
> var new2 = new OpenLayers.Layer.Text( 'Texts', {
> layerToUse: markers, newLat: '4188741.7304207', newLon:
> '217101.58694106', newTitle: "Title1", newDesc: "Desc1",
> idUser : '62', userName: 'admin', newIcon:
> 'images/markers/marker.png'} );
> new2.parseData();
> var new3 = new OpenLayers.Layer.Text( 'Texts', {
> layerToUse: markers, newLat: '4182021.7304207', newLon:
> '210801.58694106', newTitle: "Title2", newDesc: "Desc2",
> idUser : '62', userName: 'admin', newIcon:
> 'images/markers/marker-blue.png'} );
> new3.parseData();
> var new4 = new OpenLayers.Layer.Text( 'Texts', {
> layerToUse: markers, newLat: '4179441.7304207', newLon:
> '219681.58694106', newTitle: "Title3", newDesc: "Desc3",
> idUser : '62', userName: 'admin', newIcon:
> 'images/markers/marker.png'} );
> new4.parseData();
> I am not quite sure what that click function does, could it be
> the culprit?
>
> I have used this example as a base:
>
> http://dev.openlayers.org/releases/OpenLayers-2.8/examples/markers.html
> The thing is I use a form also to create new bubbles where
> users can enter a title, marker icon and description and get a
> result similar to the above.
>
> Thanks again,
>
> Alex
>
> On Thu, Feb 4, 2010 at 3:34 PM, Alexandre Dube
> <ad...@mapgears.com <mailto:ad...@mapgears.com>
> <mailto:ad...@mapgears.com <mailto:ad...@mapgears.com>>> wrote:
>
> Alex,
>
> I just looked at the SelectFeature control code and I
> think you
> could try this solution :
>
> Change you Marker layer for a Vector one (you can define
> externalGraphic to a vector feature, see an example [1])
> and then
> configure your SelectFeature control with both your layers :
>
> var select = new OpenLayers.Control.SelectFeature([vectors,
> markers], options);
>
> The SelectFeature control will create a RootContainer layer
> object enabling selection on both at the same time, thus fixing
> your issue. Please, tell me if that worked.
>
> Hope this helps,
>
> Alexandre
>
> [1] http://openlayers.org/dev/examples/styles-unique.html
>
>
> Alex G. wrote:
>
> Hi all,
>
> I am probably having a conflict problem with some of my
> layers. I currently have 3 layers active on my
> installation:
> - a layer containing the data from a shapefile (running
> WMS)
> - a vector layer where users can draw
> - a layer dedicated to markers.
>
> I have noticed that if I place a marker, I cannot interact
> with it afterwards unless I hide the vectors layer. The
> order
> is correct, I load first the shp layer, then the vector one
> and then the markers one.
>
> I include here some of my code in hope that it will
> help, it's
> mostly from examples on openlayers so there's really
> nothing new.
>
> map = new OpenLayers.Map('map',{maxExtent: new
>
>
> OpenLayers.Bounds(195441.084706006,4171163.51662705,240142.089176109,4203199.94421431),
> maxResolution: 120, units: 'dd'});
> layer = new OpenLayers.Layer.WMS( 'Landmass ',
>
>
> 'http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;>
>
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;>>
>
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;>
>
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;>>>',
>
> {
> layers: 'zak',
> format:'PNG',
> bbox:
>
>
> '195441.084706006,4171163.51662705,240142.089176109,4203199.94421431',
> srs: 'EPSG:4326'
> });
> lakegr_wms = new OpenLayers.Layer.WMS( 'Lakes',
>
>
> 'http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;>
>
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;>>
>
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;>
>
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;
>
> <http://localhost:8585/cgi-bin/mapserv?map=/opt/fgs/apps/gmap-demo-cvs_MS_VERSION_54/htdocs/gmap75a.map&;>>>',
>
>
> {
> layers: 'sedi',
> transparent: 'true',
> format: 'image/png'
> },
> {isBaseLayer: false}
> );
> vectors = new OpenLayers.Layer.Vector(
> 'Editable' );
> vectors.onFeatureInsert=function(feature) {
> var
> wkt=wktwriter.write(feature);
> console.log(wkt);
> }
> map.addLayer(layer);
> map.addLayers([lakegr_wms,vectors]);
> map.addControl(new
> OpenLayers.Control.LayerSwitcher());
> controls = {
> point: new
> OpenLayers.Control.DrawFeature(vectors,
> OpenLayers.Handler.Point),
> line: new
> OpenLayers.Control.DrawFeature(vectors,
> OpenLayers.Handler.Path),
> polygon: new
> OpenLayers.Control.DrawFeature(vectors,
> OpenLayers.Handler.Polygon),
> drag: new
> OpenLayers.Control.DragFeature(vectors)
> };
>
> for(var key in controls) {
> map.addControl(controls[key]);
> }
>
> map.zoomTo(1);
> var options = {
> hover: true,
> highlightOnly: true
> };
> var select = new
> OpenLayers.Control.SelectFeature(vectors, options);
> selectCtrl = new
> OpenLayers.Control.SelectFeature(vectors,
> {
> clickout: true,
> onSelect: serialize
> }
> );
> map.addControl(select);
> map.addControl(selectCtrl);
> select.activate();
> selectCtrl.activate();
> *
> * Inherits from:
>
> var markers = new OpenLayers.Layer.Markers(
> 'Markers' );
> map.addLayer(markers);
>
> Rest of the code is taken from the markers example on
> OpenLayers.
>
> Can anyone think of any reason why they would conflict?
> I am
> thinking it has something to do with clicks and some of the
> controls I use might be conflicting although I can't
> see any
> Javascript errors.
>
> Thanks in advance.
>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Dev mailing list
> Dev@openlayers.org <mailto:Dev@openlayers.org>
> <mailto:Dev@openlayers.org <mailto:Dev@openlayers.org>>
>
> http://openlayers.org/mailman/listinfo/dev
>
>
>
> -- Alexandre Dubé
> Mapgears
> www.mapgears.com <http://www.mapgears.com>
> <http://www.mapgears.com>
>
>
>
>
> --
> Alexandre Dubé
> Mapgears
> www.mapgears.com <http://www.mapgears.com>
>
>
--
Alexandre Dubé
Mapgears
www.mapgears.com
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