Hi,
I could imagine having several expressions for one layer (depending on
the field I want to do calculations on) so autoload needs to depend on
the layer and the field. On the other hand I could imagine having an
area field in many layers which I want to update with the geometry's
area. So a possibility to choose from saved expressions (independent of
the layer) would come in handy, otherwise I end up copy-pasting the same
expression from one layer to the other :-(
Besides: Shape files are only one data format. If we save only the
expressions (last ten, or in a user-defined structure) we can apply them
to any vector data) or the layer expressions are saved in the project(?)
So Nathan, for me it would be both then :)
just some thoughts...
regards
Bernhard
Am 19.10.2012 07:58, schrieb Paolo Cavallini:
Il 19/10/2012 07:51, Andreas Neumann ha scritto:
For me personally, copy/paste works fine. No need for load and save.
I do not fully understand the use case for autoloading (association
with a layer). Can you explain why this is desirable? Do you really
always want the same expression in all projects for one particular layer?
I think users will fin useful to have their expression per layer, so
they can refresh a field with the same calculation, without the need to
rememberwhich formula they used (very stupi example: refreshing the AREA
field). In this way, a DBF can be used almost like a spreadsheet.
For advanced users it is probably useless, for newbies it can save a
loto of time, effort and frustration remembering which expression they
used, what is the exact syntax, where (if) they copied the expression
somewhere, etc.
All the best.
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