[Qgis-developer] Multiple styles per layer

[Martin Dobias]

Hi Andreas

On Wed, Jan 7, 2015 at 11:15 PM, Andreas Neumann <a.neumann at carto.net>
wrote:

> Hi Martin,
>
> I just saw your recent commit for support of multiple styles - but I don't
> fully get it how it works. I can add a new style and can switch to another
> style, but it seems whenever I change the symbology, it resets all styles
> at once?
>
> Or maybe I don't fully get it how it is supposed to work.
>

When you change symbology, only the currently active style should be
modified - the others should stay the same (if not then there's a bug and
please let me know). This should work: 1. add a layer, 2. add a new style
to it (will get activated), 3. change symbology, 4. switch back to previous
style - you should see the previous symbology.

The idea is to have the possibility to define several styles for a layer -
and quickly switch between them. Before you would need to save and then
load the styles from QML files.

As the style incorporates not only rendering appearance, but also other
things like forms, so you could define different forms for different
styles. Endless new opportunities :-)


BTW: cool feature - would be cool to also expose the multiple styles in
> QGIS server (e.g. to support color and black/white styles) for the same
> layer.
>

Coming soon :-)

Cheers
Martin
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