[GRASS5] column names GUI button

GRASS GIS GRASS GIS developer
1

Hi,

usually I don't remember the column names of a vector map. For
this once we added '-c' to v.info to generate the list of column names,
such as

v.info -c roads
Displaying column types/names for database connection of layer 1:
INTEGER|cat
CHARACTER|label

But it would be nice to have this as a button in the GUI.
So I have added three new functions to VECTLIB:

char *Vect_get_column_names (struct Map_info *Map, int field);
char *Vect_get_column_types (struct Map_info *Map, int field);
char *Vect_get_column_names_types (struct Map_info *Map, int field);

which generate a comma separated list as (potential) input to a
GUI button, e.g. in display/d.vect/main.c

  attrcol_opt->answers = Vect_get_column_names (&Map, atoi (lfield_opt->answer));

Unfortunately, this code obviously crashes as we neither have Map nor lfield_opt
at this state of program execution (before G_parser()).

So these new functions are sort of useless (for this task). Anyway, there
are available now.

Markus

2

Markus,

This is GREAT. I NEVER remember the column names, as the cerebral hard disk
has long since filled up and I must make due with an antiquated indexing
program :wink:

When will this be functional enough to begin using in c-modules and scripts?

Thanks very much again!

Michael

______________________________
Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
Arizona State University
Tempe, AZ 85287-2402
USA

voice: 480-965-6262; fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton

From: Markus Neteler <neteler@itc.it>
Date: Tue, 17 May 2005 18:06:54 +0200
To: grass5 developers list <grass5@grass.itc.it>
Subject: [GRASS5] column names GUI button

Hi,

usually I don't remember the column names of a vector map. For
this once we added '-c' to v.info to generate the list of column names,
such as

v.info -c roads
Displaying column types/names for database connection of layer 1:
INTEGER|cat
CHARACTER|label

But it would be nice to have this as a button in the GUI.
So I have added three new functions to VECTLIB:

char *Vect_get_column_names (struct Map_info *Map, int field);
char *Vect_get_column_types (struct Map_info *Map, int field);
char *Vect_get_column_names_types (struct Map_info *Map, int field);

which generate a comma separated list as (potential) input to a
GUI button, e.g. in display/d.vect/main.c

  attrcol_opt->answers = Vect_get_column_names (&Map, atoi
(lfield_opt->answer));

Unfortunately, this code obviously crashes as we neither have Map nor
lfield_opt
at this state of program execution (before G_parser()).

So these new functions are sort of useless (for this task). Anyway, there
are available now.

Markus