[Qgis-developer] Rule-based renderer

[Andreas Neumann]

+1

I would love to see this. In my projects it is quite commont that I need 
to symbolize based on different attributes. Up to now I did it through a 
Postgis view which concatenated all attributes and I ended up with a 
long list of various combinations.

Such a rule-based renderer would simplify my life.

However, this is only from a user perspective. I can't judge codewise.

Andreas

On 6/10/10 1:06 PM, Martin Dobias wrote:
> Hi guys,
>
> I'd like to ask you for a permission to lift feature freeze for the
> inclusion of newly implemented rule-based renderer I've been
> developing recently, but I've missed the deadline due to my former
> school duties. This new feature doesn't affect any existing code, so
> it is very unlikely that it would bring any regressions. The patch can
> be found here:
>
> https://newtrac.osgeo.org/qgis/attachment/ticket/1727/rulebasedrenderer_v2.diff
>
> The rule-based renderer is an advanced renderer for symbology-ng: it
> lets user to define rules consisting of a symbol, filter and scale
> range. The filters have the same SQL-like syntax as used for searching
> in attribute table and in field calculator. This combination gives the
> users a strong tool for customizing the appearance of the layers,
> including multi-attribute rules and scale-dependent rendering.
> Accompanied with python bindings, it allows 3rd party developers to
> implement further functionality, such as SLD import/export,
> reading/writing of Mapnik XML files and much more.
>
> If there will be no objections, I'd be happy to commit it into the trunk.
>
> Regards
> Martin
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