[Qgis-developer] legendSymbologyItems - python binding

[Chris Crook]

Hi

I want to display a custom icon on the legend for a python implementation of QgsFeatureRendererV2 (VectorFieldRenderer)

The implementation that used to work many versions of QGIS ago worked by overriding the  QgsFeatureRendererV2.legendSymbologyItems(size) function.  This function does not appear to be called now?

The legendSymbolItemsV2 function is called, so I can return a QgsLegendSymbolItemV2, and in that I can return the QgsMarkerSymbolLayerV2 derived class that my renderer uses, but the renderPoint function in that is not suitable for plotting a legend item.  It requires the QgsFeatureRendererV2.symbolForFeature call to set up the marker, and in any case is needs to be scaled down to display on the legend.  As far as I can see there is no way to identify that the renderPoint function is being called to generate a legend symbol rather than a map canvas symbol?

What is the correct way to implement a custom icon on the legend now?

Thanks
Chris

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