[QGIS-Developer] using a features subset as an input for a processing alg

[G. Allegri]

>
> It depends if you can get away with a layer subset string for the
> filter. (I.e. provider side filter). Because if so, you can embed
> these filters in layer sources, e.g.
>
>    processing.run("native:centroids",
> {'INPUT':'/home/me/layer.shp|layerid=0|subset=\"something\" =
> \'value\'','ALL_PARTS':False,'OUTPUT':'TEMPORARY_OUTPUT'})
>

Unfortunately no, since my filter is a spatial filter (a rectangle in this
case, but it's not relevant).
I fear I will have to create my own voronoi algorithm.


> Would be nice to extend QgsProcessingFeatureSourceDefinition to
> support an expression based filter, that sounds like a good
> addition...
>

Definitely :)

Giovanni


>
> Nyall
>
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