Hi Vincent On Fri, Oct 3, 2014 at 1:10 PM, Vincent Mora <vincent.m...@oslandia.com> wrote: > > We can use expressions to make the single symbol layer behave: > - graduated : properties are continuous functions of attributes, > - categorized or rule based : properties are discrete function of attributes > > The user interfaces for categorized, graduated, rule-based could remain the > same, it's just that it would generate the expressions for the single symbol > instead of configuring as specific class. Several categories could be > defined to affect various parameters (color and size are the first use > case). > > Can you tell me if the idea is sound ?
If I understand correctly, you propose to use single symbol renderer with expressions (for color and for size) in places where we currently use graduated/categorized renderers. Is that correct? If it is, how would it handle the case where symbols of individual classes are completely different? (not just varying in size/color) It would be also good to check the impact on the rendering performance - maybe if more than just few classes are used, the evaluation with expressions could slow things down significantly. (the expression engine could enjoy some performance improvements). Regards Martin _______________________________________________ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
