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[udig-devel] Question on Renderers
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Hello,
I'm hopelessly trying to understand the rationale behind all those
Renderers, RenderMetrics and RenderMetricsFactories. For that, I've
adapted the code from StaticGISWidget and I'm trying to render onto an
image I created.
I use ApplicationGIS.drawMap( drawParameters ) to render the image. It's
not working because
Renderer renderer = decisive.getRenderer(context); (around line 855)
returns a net.refractions.udig.project.internal.render.impl.PlaceHolder,
which apparently is some sort of dummy renderer, that is, does nothing.
In my application I read a project, and try to render a map (with the
adapted code from StatcGisWidget). In the printlns I added, I only see a
MapGraphicRenderMetricsFactory (which I assume is always there, as I
don't have explicitely instantiated on or created one within the
project). I cannot see any other renderes.
How does udig figures out, what sort of layer it has, say a shapefile,
and when does it do that?
What renderer is responsible for the shapefiles, is it
ShapefileFeatureRenderer?
Do I have to set the renderer myself?
Thanks in advance,
Ugo
--
Ugo Taddei
Fraunhofer Institut Intelligente Analyse- und Informationssysteme (FhG IAIS)
http://www.iais.fraunhofer.de
Department Knowledge Discovery - IAIS.KD -
Working Group Spatial Decision Support
http://www.iais.fraunhofer.de/kd.html
phone (+49)2241-14-2184 fax (+49)2241-14-2072
Schloss Birlinghoven, D-53754 Sankt Augustin, Germany
