[GRASS-dev] wxGUI data catalog

[Pietro]

Hi Martin,

On Thu, May 1, 2014 at 7:18 PM, Martin Landa <landa.martin at gmail.com> wrote:
>  Later could be added support for copying maps between
> different locations (including automated reprojection)

I would love to have this functionality somewhere on the python
library, maybe we could add a "copy" method to the Location class, see
more below.


> pyGRASS:
>
> cur_mapset = str(Mapset())
> Mapset(dst_mapset).current()
> g.copy(rast = '%s@%s,%s' % (src_map, src_mapset, dst_name)) # *
> Mapset(cur_mapset).current()
>
> * this could be replaced by something more fancy by modifying pyGRASS

Perhaps I could add a new method "copy" to Mapset If could be useful
to someone, something like:

{{{
    def copy(self, data_type, data_name, dst_mapset, dst_name=''):
        """Copies available data files in the current mapset search path
        to the user's current mapset.

        Parameters
        ----------

        data_type : string
            String with the data type that must be copied ('rast', rast3d',
            'vect', 'oldvect', 'asciivect', 'icon', 'labels', 'sites',
            'region', 'region3d', 'group', 'view3d').
        data_name : string
            Name of the data that you want to copy.
        dst_mapset : string
            Name of the destination mapset.
        dst_name : string, optional
            Name of the copy.
        """
        from grass.pygrass.modules.shortcuts import general as g
        # set the destination mapset as current
        Mapset(dst_mapset).current()
        # copy the data from origin to destination
        g.copy(**{data_type: '%s@%s,%s' % (data_name, self.name,
                             dst_name if dst_name else data_name)})
        # set the origin as current
        self.current()
}}}

In this way you should be able to do the same operation with:

{{{
Mapset().copy('rast', src_map, dst_mapset, dst_name)
}}}

and should be possible to implement something similar for the location.

{{{
Location().copy(data_type, data_name, src_mapset, dst_location,
dst_mapset, dst_name)
}}}


> Personally I incline to promote pyGRASS as interface for user scripts,
> but in wxGUI I still prefer to use GRASS Scripting Library to call
> GRASS commands on the background.

+1, or using pygrass through Soeren's RPC interface.

Pietro