[Qgis-user] Style menu: data-defined color

[Julian Schall]

Hi Bernhard,

thank's for your quick answer.

Julian 

------------------------------

Message: 8
Date: Wed, 23 Jul 2014 12:29:32 +0200
From: Bernhard Str?bl < >
To: qgis-user at lists.osgeo.org
Subject: Message-ID: <53CF8E8C.607 at jena.de>
Content-Type: text/plain; charset=windows-1252; format=flowed

Example 1
CASE WHEN "value" = 'value1' THEN '#ff0000' ELSE '#ffff00' END
Fill all polygons with value = value1 in red and all the rest in yellow

Example 2
CASE WHEN "value" = 'value1' THEN '#ff0000' WHEN "value" = 'value3' THEN 
'#ffff00' END
Fill all polygons with value = value1 in red and with value3 in yellow 
(all the rest is filled in black as no ELSE is defined)

Bernhard

Am 23.07.2014 12:03, schrieb Julian Schall:
> Hi,
>
> maybe a simple question, but I couldn?t find the answer on my own: How
> can I automatically change the color of polygons by the content of an
> attribute table column?
>
> For Example: Polygonlayer with 3 objects. Object 1 and 2 have ?value1?
> in the column ?value? and object 3 has ?value3? there. Now QGIS should
> fill polygon 1 and 2 in one color and polygon 3 in another.
> I tried it with data-defined properties?check color and choose ?value?
> for field but then all polygons are black. Do I have to write a special
> expression?
>
> Thanks for help!
>
> Regards
>
> Julian
>