[OpenLayers-Users] Problem with styling vectorfeatures depending on their attributes

[Max Stephan]

Hi list,

I have a vectorlayer to which the user can add features and modify those
features. The user can change the attributes for the features like
fillColor, strokeColor etc. in a form. A javascript-method is executed by a
button-click and saves those attributes as vectorattributes (e.g.
feature.attributes.fillColor).

In the styleMap I´m reading those values from the vectorattributes to change
the styling. The stylemap-Code looks like this:
var pointStyleMap = new OpenLayers.StyleMap({
	"default": new OpenLayers.Style({
	fillColor: "${fillColor}",
	fillOpacity: 0.5,
	strokeColor: "${strokeColor}",
	strokeWidth: "${strokeWidth}",
	pointRadius: 10,
	graphicZIndex: "${graphicZIndex}"
	}
	),
	"select": new OpenLayers.Style({
	pointRadius: 10,
	strokeColor: '#FF3333',
	strokeWidth: "${strokeWidth}"
	}
	)
});This works so far. But now I want to add 2 to the strokeWidth when the
feature is selected, so I tried it like this:
strokeWidth: "${strokeWidth}" + 2The effect is that the 2 is only appended
(the code seems to interprete strokeWidth as a String although I parsed it
to an Int via parseInt(), e.g. for a strokeWidth of 2 I get 22 as a result).
It´s possible to solve this problem by defining a context for the style but
in my opinion that´s a little overkill for such a simple task.
{context:
	{strokeWidth: function (feature){return (feature.attributes.strokeWidth +
2)}}
}Now I want to get the pointRadius from the attributes but no matter which
method I try, it always ends in the error message: "Line: 625 Column: 408,
invalid Argument (OpenLayer.js)". Also tried to parse it to an Int again
directly in the styleMap .. no effect.
I have to use IE for this project so no further debug information is
available (I´m also not able to install IE8 with it´s debugging features due
to limited admin rights at my workstation).

Any idea how I could solve this problem?
Thx in advance
Max Stephan

-- 
View this message in context: http://n2.nabble.com/Problem-with-styling-vectorfeatures-depending-on-their-attributes-tp3663197p3663197.html
Sent from the OpenLayers Users mailing list archive at Nabble.com.