How about adding this feature (aggregate functions like max/min/avg
etc.) to QgsExpression instead? Then it could not only be used in the
composer.
Best
Matthias
On Tue 07 Jan 2014 11:50:24 AM CET, Bernhard Ströbl wrote:
Hm,
if you look at JasperReports it is Java. Can you implement this
internally into QGIS? Looking at reports in general some kind of
programming will always be needed to generate an individual report
because the data structure is individual, too, so I think it will
always be something for specialists.
An idea to start with would be to create a new element in Composer
that makes simple calculations like sum or average on a field: Choose
layer - choose field - choose what to do. Evaluation time will be the
same as for the map (either permanetly or on request but at least
before printing).
Bernhard
Am 07.01.2014 11:16, schrieb Paolo Cavallini:
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Il 06/01/2014 10:40, Bernhard Ströbl ha scritto:
the need to create some kind of reports is often uttered. IMHO a
dedicated reporting
tool can always handle this better than anything implemented in QGIS
or any other GIS
(because it is not a main GIS feature). I successfully coupled a Python
implementation of JasperReports [1] with QGIS. JasperReports not
only allows
sum/average and the like but also subreports (for ?:n relations)
charts and much
more. AFAIK (but have not tried myself) LibreOffice output is
possible, too. This
solution needs some Python programming to create an XML document
from your data and
send the data and the report template to the server.
Hi all.
I agree this is an important issue. I heard there was some plan to
implement this:
anyone knows the current status, and the prospects for the future?
Obviously, we have always the same duality: implementing outside QGIS
is easier and
more powerful, reusing existing tools, whereas an internal
implementation is far
smoother from an user point of view.
Historically, in most analogous cases we ended up implementing an
internal solution
(sometimes using common libs), and I suspect sooner or later we'll
have to do the
same for reporting also.
All the best.
- --
Paolo Cavallini - www.faunalia.eu
Corsi QGIS e PostGIS: http://www.faunalia.eu/training.html
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