[GRASS-dev] g.parser and link a relation between parameters

[Anna Petrášová]

On Wed, Mar 25, 2015 at 3:59 AM, Pietro <peter.zamb at gmail.com> wrote:

> Hi devs,
>
> may be I'm missing something stupid, but if I want to write a GRASS
> modules that takes two different vectors and allows for each vetor to
> select a column, something like:
>
> {{{
> #%module
> #% description: Test
> #% keyword: vector
> #%end
> #%option G_OPT_V_INPUT
> #% key: vect0
> #%end
> #%option G_OPT_V_FIELD
> #% key: vect0_layer
> #% required: no
> #%end
> #%option G_OPT_DB_COLUMN
> #% key: vect0_column_cost
> #%end
> #%option G_OPT_DB_COLUMN
> #% key: vect0_column_maintenance
> #%end
> #%option G_OPT_V_INPUT
> #% key: vect1
> #%end
> #%option G_OPT_V_FIELD
> #% key: vect1_layer
> #% required: no
> #%end
> #%option G_OPT_DB_COLUMN
> #% key: vect0_column_other
> #%end
> #%option G_OPT_V_OUTPUT
> #%end
> from pprint import pprint
> import grass.script.core as gcore
>
>
> def main(options, flags):
>     pprint(options)
>     pprint(flags)
>
> if __name__ == "__main__":
>     main(*gcore.parser())
> }}}
>
> How can I say to WxGui that vect0_column_cost should display a
> combobox with the available columns of the table linked with a layer
> specify in vect0_layer of the vector map with name specify in vect0?
>
> For the GRASS addons and GUI that we are developing we decide to use
> the same root word: "vect0" and "vect1" to link the different
> parameters to the vector, there are any better way to solve this? May
> be something that it is working natively in GRASS?
>
>
There is 'guidependency' in parser, look at
http://trac.osgeo.org/grass/changeset/64914

The problem is that in case of 2 vector inputs, the gui is not working
properly - the layers and columns are not found for the second vector. I
haven't look into it yet.

Anna

Thank you for your help.
>
> Pietro
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