Geografic-Information-System/raster/r.digit/get_label.c

/****************************************************************************
 *
 * MODULE:       r.digit
 *
 * AUTHOR(S):    Michael Shapiro - CERL
 *
 * PURPOSE:      Interactive tool used to draw and save vector features
 *               on a graphics monitor using a pointing device (mouse)
 *               and save to a raster map.
 *
 * COPYRIGHT:    (C) 2006 by the GRASS Development Team
 *
 *               This program is free software under the GNU General Public
 *               License (>=v2). Read the file COPYING that comes with GRASS
 *               for details.
 *
 ***************************************************************************/

#include <grass/gis.h>
#include <grass/display.h>
#include <grass/glocale.h>


long get_cat(char *type)
{
    char buffer[256];
    long cat;

    for (;;) {
	fprintf(stdout, _("Enter the category number for this %s: "), type);
	if (!G_gets(buffer))
	    continue;;
	if (sscanf(buffer, "%ld", &cat) != 1)
	    continue;
	break;
    }
    return cat;
}

char *get_label(long cat, struct Categories *labels)
{
    static char buffer[1024];

    for (;;) {
	fprintf(stdout, _("Enter a label for category %ld [%s] "),
		cat, Rast_get_c_cat((CELL *) &cat, labels));
	if (!G_gets(buffer))
	    continue;;
	G_strip(buffer);
	break;
    }
    return buffer;
}

int get_category(FILE * fd, char *type, struct Categories *labels)
{
    long cat;
    char *lbl;

    R_stabilize();		/* force out all graphics */
    do {
	fprintf(stdout, "\n");
	cat = get_cat(type);
	lbl = get_label(cat, labels);
	fprintf(stdout, "%ld [%s]\n", cat,
		*lbl ? lbl : Rast_get_c_cat((CELL) cat, labels));
    } while (!G_yes(_("Look ok? "), 1));
    if (*lbl)
      Rast_set_c_cat((CELL *) &cat, (CELL *) &cat, lbl, labels);

    fprintf(fd, "= %ld %s\n", cat, lbl);
    return (0);
}