[Qgis-developer] QgsRasterLayer legend interface, where is it gone ?

Sandro Santilli strk at keybit.net
Tue Dec 16 03:01:59 PST 2014

According to documentation for the QgsRasterLayer class [1], a raster
layer can export its legend as a pixmap using a legendPixmap() method,
but the code doesn't not contain any such virtual method.

[1] http://qgis.org/api/classQgsRasterLayer.html

Instead, the class has a (non-virtual) method to retrieve a legend
in form of a list of name/color pairs.

A pure image legend is not accounted for in the raster interface
anymore.  Still, beside the documentation, there's also a LegendUrl
property under the "Metadata" tab of raster layer properties, which
does not seem to be used at all either.

Is there a plan to allow raster layers to expose their layer again
as an image ? I'm trying to figure out the best way to expose per-layer
WMS legend configuration, to complete the "WMS contextual legend" QEP [2]

[2] https://github.com/qgis/QGIS-Enhancement-Proposals/pull/15


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