[OpenLayers-Users] custom feature markers

[Christopher Schmidt]

On Tue, Jan 27, 2009 at 03:40:55PM +0200, Samuli Saarinen wrote:
> Christopher Schmidt wrote:
> >http://docs.openlayers.org/library/feature_styling
> >
> >"In this way, the style can contain rendering information which is
> >dependant on the feature: for example, in a Style object, the string
> >${thumbnail} is replaced by the featureâ??s â??thumbnailâ??
> >attribute."
> 
> Hi and thanks for the quick reply!
> 
> I have read the docs but AFAIKT the "${thumbnail}" is replaced with a 
> url of a server-side image. What I am trying to achive is to be able to 
> draw custom image on the client side using OL.
> 
> Something along the lines
> 
> var context = {
> getGraphic: function(feature) {
>     return 
> OpenLayers.Geometry.Polygon.createRegularPolygon(feature.geometry,1,4, 45);
> }
> 
> };

http://openlayers.org/dev/examples/graphic-name.html    

http://trac.openlayers.org/browser/trunk/openlayers/lib/OpenLayers/Renderer/Elements.js#L910

-- Chris

> var template = {externalGraphic: "${getGraphic}"};
> var style = new OpenLayers.Style(template, {context: context});
> 
> Is this somehow possible?
> I hope this helps to understand what I'm trying to accomplish.
> 
> 
> >However, OpenLayers KML support does not have support for any kind of
> >attribute parsing from KML other than title and description. I would
> >recommend that you should instead use KML <Style> or <StyleURL> blocks,
> >and set extractStyles to true on your KML format, which will indicate
> >that OpenLayers should parse and use those styles. 
> 
> Yes we have been using KML with styles but I think we'll have to change 
> that to (geo)JSON if I can get the client side feature drawing working.
> 
> -Samuli
> 

-- 
Christopher Schmidt
MetaCarta