Hi Nathan,
Good to hear that you are working on this.
I just wonder if it wouldn't make sense to have a general purpose
"virtual column" that could be introduced in QGIS. This would be useful
for:
* labeling
* map tips/QGIS server tooltip display
* symbology
* plugins
* others?
It would be convenient to use the field calculator, but instead of just
writing out to a physically existing column it would create a new
virtual column, just like a virtual column in a database view.
Otherwise one would have to develop the same functionality several
times - for labeling, for tooltips, etc.
Do you think it would be feasible to implement this on a lower level in
QGIS so that users could transparently work with virtual columns
wherever they want?
Andreas
On Thu, 28 Jul 2011 16:09:56 +1000, Nathan Woodrow wrote:
My upcoming patch that adds expression based labels will be able
to achieve this once it's completed; I'm just cleaning up the UI
and testing everything then I will get the guys to merge it in.
Until then you will need to create a new column.
- Nathan
On Wed, Jul 27, 2011 at 9:15 PM, Torsten Lange wrote:
Ok, thank you, Andreas!
Torsten
Am Mittwoch 27 Juli 2011, 11:00:01 schrieb Andreas Neumann:
Hi,
>
> Currently, you have to create a new column. I usually create a
view in
> Postgis for this purpose.
>
> It is in on the wishlist that one can create a "virtual" column
- not
> only for labeling, but also for map tips and perhaps
symbolization.
> Until then you have to do it yourself.
>
> Andreas
>
> On Tue, 26 Jul 2011 22:51:34 +0200, Torsten Lange wrote:
> > Hi,
> >
> > Is there a way just to print - lets say - the first four
letters of a
> > objects
> > name? Or must I create a new row for that?
> >
> > Thank you, Torsten
> > _______________________________________________
> > Qgis-user mailing list
> > [email protected] [1]
> > http://lists.osgeo.org/mailman/listinfo/qgis-user [2]
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