[OpenLayers-Users] How to make a drag and drop for markers?

[Alexandre Dube]

Hi,

Jimmy Aumard wrote:
> Thanks it's perfect for my application!!!
>
> I just have to develop that :s
>
> I have one question : It's possible to put an offset to the external 
> graphic? Because images of markers (marker.png) are centered on the 
> center of the image's marker and not on the bottom of the image's marker
>

check in lib/OpenLayers/Feature/Vector.js at the end.  All properties 
are there, so check the following to do what you need :

 * graphicXOffset - {Number} Pixel offset along the positive x axis for 
displacing an external graphic.
 * graphicYOffset - {Number} Pixel offset along the positive y axis for 
displacing an external graphic.

Never tried this, but I definitively will soon.

Best regards,

Alexandre

> I'm not sure I'm clear but it's difficult to explain this in English 
> for my...  Sorry
>
>
> Cheers
>
> Jim
>
> 2009/8/24 Alexandre Dube <adube at mapgears.com <mailto:adube at mapgears.com>>
>
>     Jimmy Aumard wrote:
>
>         Hello, thanks for answers,
>
>         My problème is I use markers and I put/update attributes on
>         each in my database. I don't know how put or update attributes
>         with vector layer (if you have an example I take it :D).
>
>
>     You need a server that supports transactions :
>
>      - GeoServer
>      - TinyOWS
>      see the example :
>     http://openlayers.org/dev/examples/wfs-protocol-transactions.html
>
>      - FeatureServer (uses MapFish protocol)
>      see a demo : http://dev4.mapgears.com/bdga-fs/
>
>      The FS demo also shows a way to edit feature's attributes.
>
>
>         I use vector layer for polygon with DragFeature. I know this
>         solution but points representation is a point an I use icon,
>         It's possible to put an icon to a point with a vector layer?
>
>
>     Yes.  Look at the following example and search the source for the
>     externalGraphic property.
>     http://openlayers.org/dev/examples/styles-unique.html
>
>     Regards,
>
>     Alexandre
>
>
>         Sorry for my english :s
>
>         Cheers
>
>         Jim
>
>
>         2009/8/24 Eric Lemoine <eric.lemoine at camptocamp.com
>         <mailto:eric.lemoine at camptocamp.com>
>         <mailto:eric.lemoine at camptocamp.com
>         <mailto:eric.lemoine at camptocamp.com>>>
>
>
>            On Friday, August 21, 2009, Alexandre Dube
>         <adube at mapgears.com <mailto:adube at mapgears.com>
>            <mailto:adube at mapgears.com <mailto:adube at mapgears.com>>> wrote:
>            > Hi,
>            >
>            >   One way to accomplish this is to use a Vector layer
>         instead of a
>            > Marker layer and use a ModifyFeature control do move your
>         points
>            > (markers) around.
>
>            The DragFeature control may be of interest as well.
>
>
>
>
>            --
>            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
>         <mailto:eric.lemoine at camptocamp.com>
>            <mailto:eric.lemoine at camptocamp.com
>         <mailto:eric.lemoine at camptocamp.com>>
>            http://www.camptocamp.com
>
>
>
>
>     -- 
>     Alexandre Dubé
>     Mapgears
>     www.mapgears.com <http://www.mapgears.com>
>
>


-- 
Alexandre Dubé
Mapgears
www.mapgears.com