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: [email protected] [mailto:[email protected]] On Behalf Of
Andreas Hocevar
Sent: quinta-feira, 15 de Janeiro de 2009 15:11
To: Andre Pereira de Matos
Cc: [email protected]; [email protected]
Subject: Re: [OpenLayers-Dev] New DragFeature Control and SelectFeatureControl
cross layers. Want to share
Hi Andre,
2009/1/13 Andre Pereira de Matos <[email protected]>:
> 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
[email protected]
http://openlayers.org/mailman/listinfo/dev
![http://openlayers.org/dev/img/marker-gold.png"](http://openlayers.org/dev/img/marker-gold.png"){kind=link}
![http://openlayers.org/dev/examples/marker_shadow.png"](http://openlayers.org/dev/examples/marker_shadow.png"){kind=link}