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/****************************************************************************
*
* MODULE: d.northarrow
*
* AUTHOR(S): Hamish Bowman, Dunedin, NZ <hamish_b yahoo.com>
*
* PURPOSE: Displays a north arrow on graphics monitor
*
* COPYRIGHT: (C) 2013 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <math.h>
#include <grass/gis.h>
#include <grass/display.h>
#include <grass/glocale.h>
#include "options.h"
int fg_color, bg_color, text_color;
// int do_background = TRUE;
int main(int argc, char **argv)
{
struct GModule *module;
struct Option *bg_color_opt, *fg_color_opt, *coords, *n_arrow, *fsize,
*width_opt, *rotation_opt, *lbl_opt, *text_color_opt, *font, *path,
*charset;
struct Flag *no_text, *rotate_text, *rads;
double east, north;
double rotation;
double fontsize, line_width;
int rot_with_text;
/* Initialize the GIS calls */
G_gisinit(argv[0]);
module = G_define_module();
G_add_keyword(_("display"));
G_add_keyword(_("cartography"));
G_add_keyword(_("map annotations"));
G_add_keyword(_("arrow"));
module->description = _("Displays a north arrow on the graphics monitor.");
n_arrow = G_define_option();
n_arrow->key = "style";
n_arrow->description = _("North arrow style");
n_arrow->options = "1a,1b,2,3,4,5,6,7a,7b,8a,8b,9,fancy_compass,basic_"
"compass,arrow1,arrow2,arrow3,star";
G_asprintf((char **)&(n_arrow->descriptions),
"1a;%s;"
"1b;%s;"
"2;%s;"
"3;%s;"
"4;%s;"
"5;%s;"
"6;%s;"
"7a;%s;"
"7b;%s;"
"8a;%s;"
"8b;%s;"
"9;%s;"
"fancy_compass;%s;"
"basic_compass;%s;"
"arrow1;%s;"
"arrow2;%s;"
"arrow3;%s;"
"star;%s;",
_("Two color arrowhead"), _("Two color arrowhead with circle"),
_("Narrow with blending N"), _("Long with small arrowhead"),
_("Inverted narrow inside a circle"),
_("Triangle and N inside a circle"),
_("Arrowhead and N inside a circle"),
_("Tall half convex arrowhead"),
_("Tall half concave arrowhead"), _("Thin arrow in a circle"),
_("Fat arrow in a circle"), _("One color arrowhead"),
_("Fancy compass"), _("Basic compass"), _("Simple arrow"),
_("Thin arrow"), _("Fat arrow"), _("4-point star"));
n_arrow->answer = "1a";
n_arrow->guisection = _("Style");
n_arrow->gisprompt = "old,northarrow,northarrow";
coords = G_define_option();
coords->key = "at";
coords->key_desc = "x,y";
coords->type = TYPE_DOUBLE;
coords->answer = "85.0,15.0";
coords->options = "0-100";
coords->label = _("Screen coordinates of the rectangle's top-left corner");
coords->description = _("(0,0) is lower-left of the display frame");
rotation_opt = G_define_option();
rotation_opt->key = "rotation";
rotation_opt->type = TYPE_DOUBLE;
rotation_opt->required = NO;
rotation_opt->answer = "0";
rotation_opt->description =
_("Rotation angle in degrees (counter-clockwise)");
lbl_opt = G_define_option();
lbl_opt->key = "label";
lbl_opt->required = NO;
lbl_opt->answer = "N";
lbl_opt->description = _("Displayed letter on the top of arrow");
lbl_opt->guisection = _("Text");
fg_color_opt = G_define_standard_option(G_OPT_CN);
fg_color_opt->label = _("Line color");
fg_color_opt->guisection = _("Colors");
bg_color_opt = G_define_standard_option(G_OPT_CN);
bg_color_opt->key = "fill_color";
bg_color_opt->label = _("Fill color");
bg_color_opt->guisection = _("Colors");
text_color_opt = G_define_standard_option(G_OPT_C);
text_color_opt->key = "text_color";
text_color_opt->label = _("Text color");
text_color_opt->answer = NULL;
text_color_opt->guisection = _("Colors");
width_opt = G_define_option();
width_opt->key = "width";
width_opt->type = TYPE_DOUBLE;
width_opt->answer = "0";
width_opt->description = _("Line width");
font = G_define_option();
font->key = "font";
font->type = TYPE_STRING;
font->required = NO;
font->description = _("Font name");
font->guisection = _("Text");
fsize = G_define_option();
fsize->key = "fontsize"; /* size in d.text */
fsize->type = TYPE_DOUBLE;
fsize->required = NO;
fsize->answer = "14";
fsize->options = "1-360";
fsize->description = _("Font size");
fsize->guisection = _("Text");
path = G_define_standard_option(G_OPT_F_INPUT);
path->key = "path";
path->required = NO;
path->description = _("Path to font file");
path->gisprompt = "old,font,file";
path->guisection = _("Font settings");
no_text = G_define_flag();
no_text->key = 't';
no_text->description = _("Draw the symbol without text");
no_text->guisection = _("Text");
charset = G_define_option();
charset->key = "charset";
charset->type = TYPE_STRING;
charset->required = NO;
charset->description =
_("Text encoding (only applicable to TrueType fonts)");
charset->guisection = _("Text");
rotate_text = G_define_flag();
rotate_text->key = 'w';
rotate_text->description = _("Do not rotate text with symbol");
rotate_text->guisection = _("Text");
rads = G_define_flag();
rads->key = 'r';
rads->description = _("Use radians instead of degrees for rotation");
/* TODO:
- add a -n flag to rotate to match true north instead of grid north.
Similar to 'g.region -n' but use the at=x,y coord for the convergence
angle calc. (assuming that's the center of the icon)
*/
if (G_parser(argc, argv))
exit(EXIT_FAILURE);
sscanf(coords->answers[0], "%lf", &east);
sscanf(coords->answers[1], "%lf", &north);
fontsize = atof(fsize->answer);
if (no_text->answer)
fontsize = -1;
rot_with_text = 0;
if (!rotate_text->answer)
rot_with_text = 1;
/* Convert to radians */
rotation = atof(rotation_opt->answer);
if (!rads->answer)
rotation *= M_PI / 180.0;
rotation = fmod(rotation, 2.0 * M_PI);
if (rotation < 0.0)
rotation += 2.0 * M_PI;
/* Parse and select foreground color */
fg_color = D_parse_color(fg_color_opt->answer, 1);
/* Parse and select background color */
bg_color = D_parse_color(bg_color_opt->answer, 1);
/* Parse and select text color */
if (text_color_opt->answer)
text_color = D_parse_color(text_color_opt->answer, 0);
else if (strcmp(fg_color_opt->answer, "none") != 0)
text_color = D_parse_color(fg_color_opt->answer, 1);
else if (strcmp(bg_color_opt->answer, "none") != 0)
text_color = D_parse_color(bg_color_opt->answer, 1);
else
text_color = 0;
line_width = atof(width_opt->answer);
if (line_width < 0)
line_width = 0;
else if (line_width > 72)
line_width = 72;
D_open_driver();
if (font->answer)
D_font(font->answer);
else if (path->answer)
D_font(path->answer);
if (charset->answer)
D_encoding(charset->answer);
draw_n_arrow(east, north, rotation, lbl_opt->answer, rot_with_text,
fontsize, n_arrow->answer, line_width);
D_save_command(G_recreate_command());
D_close_driver();
exit(EXIT_SUCCESS);
}
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