Hi Tom,
You can nest the CASE statments, like:
CASE WHEN expression1 THEN
CASE WHEN expression1_1 THEN xxx
WHEN expression1_2 THEN yyy
ELSE zzz END
END
I am sure there are some examples, both in the internal help or also if
you google for it.
As for SVG paths. You will have to experiment. You can use paths
relative to the SVG symbol repository or absolute paths. You can also
concatentate paths from different variables.
Good luck,
Andreas
Am 2015-01-05 14:08, schrieb Tom Lennon:
Hi All;
What I am looking for is something like Layer
Properties>Style>Categorized>Labels>Categorized. I am Surprised to see
how much Bernd is able to do proofing layers with line data defined
line styles. What I need is data defined label styles for each data
defined line style. I am using QGIS 2.6 on stand alone PC and cannot
figure a way to get a data defined marker symbol background into a
CASE rule. I tried adding the SVG path but it is disregarded or errors
out because I need 2 settings (the symbol path and the field name for
text.). This if for a road layer which includes class (interstate,
federal...) and number (route number for showing as text on the
background shape. Showing all as the same marker symbol would not work
because numbers are repeated between the classes. All I have been able
to do is open multiple copies of the same layer, select a different
class for each and apply a single marker symbol background for that
class. That means there will be 8 copies of the road shapefile in this
case. Is there a way using CASE to do this?
Thanks
Tom
On Sat, Jan 3, 2015 at 6:33 AM, Andreas Neumann <a.neum...@carto.net>
wrote:
Hi,
Background symbols for highway numbers are better done in the
labelling settings, and not with different styles. That you way you
only need one layer and one category - the rest is done with rules
for the individual graphical properties. You can use CASE rules for
having different simple shape or SVG backgrounds.
Andreas
On 03.01.2015 01:12, Tom Lennon wrote:
Hi All
I am trying to add highway route number background symbols to a
transportation layer. There are 9 different unique symbols. I can
only specify one per layer. I tried using Layer Properties>Feature
Subset> query but could only specify one feature set for the
layer. I also tried double clicking the line symbol for a subset
under style and the green plus sign but that only produced lines
drawn with the marker symbol. Do I need to add 9 copies of the
layer, set the properties for each subset I need and symbolize
each individually?
Hope I have missed some easier method.
Tom
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