[GRASS-user] d.rast in python script

Wed Oct 24 02:05:23 PDT 2018

Hi Frank,

Using GRASS standard parser options is a good practice. Unfortunately, it does not yet generate the "add to tree layer" check box in the AddOn GUI (though I hope that can be added in core though).

You can use e.g. G_OPT_R_OUTPUT and still choose a non-standard key-name for the option in your script with a line like this:
#% key: my_option_key_name

Cheers,
Stefan

From: Frank David <frank.david at geophom.fr>
Sent: onsdag 24. oktober 2018 10:48
To: Stefan Blumentrath <Stefan.Blumentrath at nina.no>; Nikos Alexandris <nik at nikosalexandris.net>
Cc: Laurent C. <lrntct at gmail.com>; GRASS user list <grass-user at lists.osgeo.org>; GRASS developers list (grass-dev at lists.osgeo.org) <grass-dev at lists.osgeo.org>
Subject: Re: [GRASS-user] d.rast in python script

Stephan,

Your last message makes me search after G_OPT_OUTPUT. I had never realized that this option makes the "add to tree layer" check box appear on the script GUI.

All my scripts create rasters without G_OPT_OUTPUT option (because the name of output are handled by the script itself) and so, without check box. Using d.rast could keep interesting i think in order to select witch one should be display or not, but for the moment I can (may be) overtake that limitation by using the G_OPT_OUTPUT option (I will see).

Sorry for confusing. And thank you very much for your help. I let you see if the ticket you had post is appropriate.

Cheers,

Frank

Le 24/10/2018 à 10:13, Stefan Blumentrath a écrit :
Hi Frank,

My guess is that the GRASS standard parser options [1] (e.g. G_OPT_R_OUTPUT, G_OPT_R_OUTPUTS, G_OPT_V_OUTPUT, ...) would be used in order to determine what has to be / could be added to the map display...

But I am no GUI dev, and cannot tell for sure, hope experts on that part of the code could chime in ...

And yes, I agree that a convenient function in the Python library for adding a map in the currently active layer manager would be a nice new feature (if it does not exist and I just overlooked it)...
Maybe another ticket?...

Cheers
Stefan

1: https://grass.osgeo.org/grass74/manuals/parser_standard_options.html

From: Frank David <frank.david at geophom.fr><mailto:frank.david at geophom.fr>
Sent: onsdag 24. oktober 2018 09:35
To: Stefan Blumentrath <Stefan.Blumentrath at nina.no><mailto:Stefan.Blumentrath at nina.no>; Nikos Alexandris <nik at nikosalexandris.net><mailto:nik at nikosalexandris.net>
Cc: Laurent C. <lrntct at gmail.com><mailto:lrntct at gmail.com>; GRASS user list <grass-user at lists.osgeo.org><mailto:grass-user at lists.osgeo.org>; GRASS developers list (grass-dev at lists.osgeo.org<mailto:grass-dev at lists.osgeo.org>) <grass-dev at lists.osgeo.org><mailto:grass-dev at lists.osgeo.org>
Subject: Re: [GRASS-user] d.rast in python script

Hi Stephan,

Thank you for the ticket. One thing seems to me important. Some (of my) scripts can generate numerous rasters and one or two cumulative raster. I don't want to add base rasters but only the few cumulative. If the script GUI have a check box, how to make the choice between these I want to display and those I don't want ?

For my point of view, the use of d.rast inside the script, as we do for all other grass command, should be possible, in order to display what we want to display.

Cheers,

Frank
Le 24/10/2018 à 09:23, Stefan Blumentrath a écrit :
Hei Nikos, Frank,

I opened an enhancement ticket, and asked to activate the "Add created map(s) into layer tree" also for addons:
https://trac.osgeo.org/grass/ticket/3686. No idea what changes this would require...

Would that cover your needs, Frank, or do you have a more interactive use in a python script in mind?
You can start a wx monitor (d.mon wx0) and add a map there, but I have not found a way to address the currently active Map Display ...

This would probably require additional function(s) in the Python libraries...?

Maybe this question is better asked at the developer list (thus I put grass-dev in CC).

Cheers
Stefan

From: Frank David <frank.david at geophom.fr><mailto:frank.david at geophom.fr>
Sent: onsdag 24. oktober 2018 08:26
To: Nikos Alexandris <nik at nikosalexandris.net><mailto:nik at nikosalexandris.net>
Cc: Stefan Blumentrath <Stefan.Blumentrath at nina.no><mailto:Stefan.Blumentrath at nina.no>; Laurent C. <lrntct at gmail.com><mailto:lrntct at gmail.com>; GRASS user list <grass-user at lists.osgeo.org><mailto:grass-user at lists.osgeo.org>
Subject: Re: [GRASS-user] d.rast in python script

Le 23/10/2018 à 23:26, Nikos Alexandris a écrit :
* Frank David <frank.david at geophom.fr><mailto:frank.david at geophom.fr> [2018-10-23 22:06:01 +0200]:

Thank you everybody for your help. Do you know why a run_command("d.rast"... in a python script is not enough to display a raster ? I don't understand why this command is so different.

Display a raster map where?

Nikos
In the active map display (and respective Layer manager) as d.rast do it with gui...

Frank
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