[Qgis-user] Variables for colour values

[Jonathan Moules]

Hi,
Yes, it is.
You want the "Data defined properties" button, which you'll see when you click on a style (in 2.6.1, it's at the bottom of the list of style options.

The variables need to be of a specific datatype/structure for each item you want to style. So Pen Width requires a double. Colour is more complex, requiring a RGBA string. The dialog shows what's necessary.

Cheers,
Jonathan

-----Original Message-----
From: qgis-user-bounces at lists.osgeo.org [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Mofo Yoda
Sent: Tuesday, February 24, 2015 11:19 AM
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] Variables for colour values

I wonder if it’s possible to use variables for colour values, line widths etc? I have rule-based styling with lots of rules, and I want to change the colour value in one place and not in every rule that uses the same symbol. I’ve been using variables a lot in CartoCSS styling, but I really miss them in QGIS. Since I can define project colours with names in QGIS, i thought it may be possible somehow.
I’m on QGIS 2.8 for OS X.
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