[OpenLayers-Dev] New DragFeature Control and
SelectFeatureControl cross layers. Want to share
Joel Tremblet
joel.tremblet at openflyers.com
Sat Jan 24 15:59:54 EST 2009
I'm interested to test your code to select a layer.GML witch contain markers.
I have 2 layers of markers but only one layer can be selected by
[CODE]
selectControl = new OpenLayers.Control.SelectFeature(map.layers[1],
{onSelect: onFeatureSelect, onUnselect: onFeatureUnselect});
{/CODE]
In which folder I must to download your patch
Thanks
Andre Pereira de Matos wrote:
>
> Forgot the code, sorry.
>
> Best Regards,
> André Matos
> http://maps.sapo.pt
>
>
> -----Original Message-----
> From: Andre Pereira de Matos
> Sent: sexta-feira, 16 de Janeiro de 2009 11:02
> To: 'Andreas Hocevar'
> Cc: dev at openlayers.org; users at openlayers.org
> Subject: RE: [OpenLayers-Dev] New DragFeature Control and
> SelectFeatureControl cross layers. Want to share
>
> Hi,
>
> I sent the code and a short explanation to OpenLayers dev and users...
>
> I didn't see your code yet... But I promise that I will.
> Thanks for sharing ;)
>
> Here is the mail, that I sent:
>
> I have done controls and handlers to handle events in features that are in
> different layers (with OpenLayers controls you only can handle events in a
> single layer, and that layer must be on the top), and as I received on
> mail requests to share my code, I decided to send it for the list. With an
> explanation how it works.
>
>
>
> Actually I made two controls, FeatureEventHandlerControl and
> DragFeatureControl and an handler (FeatureHandler) to help the
> FeatureEventHandlerControl.
>
> This two controls works pretty like the SelectFeature and DragFeature
> OpenLayers controls, but they work cross layers. They don't care about the
> layers. When you want to get an event from a feature, you must register
> that feature on the control, and when that event occurres you will be
> notified.
>
> For example:
>
> /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
>
> Var dragControl = new Sapo.Control.DragFeatureControl([], {
>
> 'dragstart': { callback: function(feacture, pixel){/*do something*/}
> context: this}
> 'drag': {
> callback: function(feacture, pixel){/*do something*/} context: this}
> 'dragend': { callback: function(feacture, pixel){/*do something*/}
> context: this}
> }
> );
> Var featureEvtHandler = new Sapo.Control.FeatureEventHandlers([], {
>
> 'click': { callback: function(feacture, pixel){/*do something*/} context:
> this}
>
> 'mouseover': { callback: function(feacture, pixel){/*do something*/}
> context: this}
>
> 'mouseout': { callback: function(feacture, pixel){/*do something*/}
> context: this}
> }
> );
>
> Map.addControl(dragControl);
> Map.addControl(featureEvtHandler);
>
> dragControl.activate();
> featureEvtHandler.activate();
>
> Var layer1 = new OpenLayers.Layer.Vector("Markers",
> {
> projection: new
> OpenLayers.Projection("EPSG:4326"),
> styleMap: new
> OpenLayers.StyleMap({
>
> externalGraphic: "http://openlayers.org/dev/img/marker-gold.png",
>
> backgroundGraphic: "http://openlayers.org/dev/examples/marker_shadow.png",
> graphicYOffset:
> -20,
>
> backgroundXOffset: 0,
>
> backgroundYOffset: -17,
> pointRadius: 10
> })
>
> }
> );
>
> Var layer2 = new OpenLayers.Layer.Vector("Markers 2",
> {
> projection: new
> OpenLayers.Projection("EPSG:4326"),
> styleMap: new
> OpenLayers.StyleMap({
>
> externalGraphic: "http://openlayers.org/dev/img/marker-gold.png",
>
> backgroundGraphic: "http://openlayers.org/dev/examples/marker_shadow.png",
> graphicYOffset:
> -20,
>
> backgroundXOffset: 0,
>
> backgroundYOffset: -17,
> pointRadius: 10
> })
>
> }
> );
>
> Map.addLayer(layer1);
> Map.addLayer(layer2);
>
> Var feature1 = new OpenLayers.Feature.Vector(new
> OpenLayers.Geometry.Point(-1904105.3415234375, 4392319.753066596)); Var
> feature2 = new OpenLayers.Feature.Vector(new
> OpenLayers.Geometry.Point(-1504105.3415234375, 4392319.753066596));
>
> Layer1.addFeatures([feature1]);
> Layer2.addFeatures([feature2]);
>
> dragControl.addFeature(feature1);
> featureEvtHandler.addFeature(feature2);
>
> /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
>
> When occurs an event(dragstart, drag, dragend, click, mouseover, mouseout)
> in any of this features, in different layers, the callbacks will be
> notified.
>
> If you have any questions just ask us (André or João)!
>
> Regards,
> André Matos
> http://maps.sapo.pt
>
>
>
> -----Original Message-----
> From: andreas.hocevar at gmail.com [mailto:andreas.hocevar at gmail.com] On
> Behalf Of Andreas Hocevar
> Sent: quinta-feira, 15 de Janeiro de 2009 15:11
> To: Andre Pereira de Matos
> Cc: dev at openlayers.org; users at openlayers.org
> Subject: Re: [OpenLayers-Dev] New DragFeature Control and
> SelectFeatureControl cross layers. Want to share
>
> Hi Andre,
>
> 2009/1/13 Andre Pereira de Matos <andre.matos at co.sapo.pt>:
>> I have made a Project with openlayers, and at some point I had to make a
>> new
>> handler and a new control to provide draggable feature and handle events
>> like, click, mouseover, mouseout in features that was in different
>> layers.
>>
>> The Openlayers control (DragFeature, SelectFeature) and handlers (Drag,
>> Feature) only works if the features are all in the same layer and the
>> layer
>> is on the top.
>
> I have no experience with the DragFeature control, but I have created
> a solution for feature selection that works with multiple layers
> recently [1]. An example is also avaialable [2].
>
> You may want to check this out, and I'd be interested to see your
> approach. Also, it would be cool to see if my approach also works with
> the DragFeature control.
>
> Regards,
> Andreas.
>
> [1] http://trac.openlayers.org/ticket/1666
> [2]
> http://dev.openlayers.org/sandbox/ahocevar/singleroot/openlayers/examples/select-feature-multilayer.html
>
> --
> Andreas Hocevar
> OpenGeo - http://opengeo.org/
> Expert service straight from the developers.
>
>
> _______________________________________________
> Dev mailing list
> Dev at openlayers.org
> http://openlayers.org/mailman/listinfo/dev
>
>
--
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