int draw_n_arrow(double east, double north, double fontsize,
char *n_arrow_num, double line_width)
{
double x_pos, y_pos;
double t, b, l, r;
double tt, tb, tl, tr; /* text box*/
SYMBOL *Symb;
RGBA_Color *line_color, *fill_color;
int R, G, B;
double x0, y0;
char icon[64];
double symbol_size;
/* Establish text size */
if (fontsize > 0)
D_text_size(fontsize, fontsize);
D_setup_unity(0);
D_get_src(&t, &b, &l, &r);
x_pos = east * (r - l) / 100.;
y_pos = (100. - north) * (b - t) / 100.;
if (line_width > 0)
D_line_width(line_width);
if (fontsize > 0) {
/* draw the "N" */
D_get_text_box("N", &tt, &tb, &tl, &tr);
D_use_color(fg_color);
/* positions manually tuned */
switch (n_arrow_num[0]) {
case '1':
D_pos_abs(x_pos - (tr + tl) / 2, y_pos - 45);
D_text("N");
break;
case '3':
D_pos_abs(x_pos - (tr + tl) / 2, y_pos - 60);
D_text("N");
break;
case '4':
D_pos_abs(x_pos - (tr + tl) / 2, y_pos - 45);
D_text("N");
break;
case '7':
D_pos_abs(x_pos - (tr + tl) / 2, y_pos - 70);
D_text("N");
break;
case '9':
case 'f':
D_pos_abs(x_pos - (tr + tl) / 2, y_pos - 55);
D_text("N");
break;
case 'b':
D_pos_abs(x_pos - (tr + tl) / 2, y_pos - 48.5);
D_text("N");
break;
case '2':
case '5':
case '6':
case '8':
break;
default:
G_fatal_error(_("Could not parse symbol"));
}
}
/* display the north arrow symbol */
line_color = G_malloc(sizeof(RGBA_Color));
fill_color = G_malloc(sizeof(RGBA_Color));
if (D_color_number_to_RGB(fg_color, &R, &G, &B) == 0)
/* fall back to black on failure */
G_str_to_color(DEFAULT_FG_COLOR, &R, &G, &B);
line_color->r = (unsigned char)R;
line_color->g = (unsigned char)G;
line_color->b = (unsigned char)B;
line_color->a = RGBA_COLOR_OPAQUE;
if (D_color_number_to_RGB(bg_color, &R, &G, &B) == 0)
/* fall back to black on failure */
G_str_to_color(DEFAULT_FG_COLOR, &R, &G, &B);
fill_color->r = (unsigned char)R;
fill_color->g = (unsigned char)G;
fill_color->b = (unsigned char)B;
fill_color->a = RGBA_COLOR_OPAQUE;
if (n_arrow_num[0] == '2' || n_arrow_num[0] == '9')
fill_color->a = RGBA_COLOR_TRANSPARENT;
/* sizes manually tuned */
switch (n_arrow_num[0]) {
case '1':
symbol_size = 35.;
break;
case '2':
symbol_size = 19.;
break;
case '3':
symbol_size = 20.;
break;
case '4':
symbol_size = 15.;
break;
case '5':
case '6':
symbol_size = 14.;
break;
case '7':
symbol_size = 23.;
break;
case '8':
case '9':
symbol_size = 17.;
break;
case 'b':
symbol_size = 80.;
break;
case 'f':
symbol_size = 100.;
break;
default:
G_fatal_error(_("Could not parse symbol"));
}
x0 = D_d_to_u_col(x_pos);
y0 = D_d_to_u_row(y_pos);
if (n_arrow_num[0] == 'b')
strcpy(icon, "n_arrows/basic_compass");
else if (n_arrow_num[0] == 'f')
strcpy(icon, "n_arrows/fancy_compass");
else {
strcpy(icon, "n_arrows/n_arrow");
strncat(icon, n_arrow_num, 32);
}
Symb = S_read(icon);
if(!Symb)
G_fatal_error(_("Could not read symbol \"%s\""), icon);
S_stroke(Symb, symbol_size, 0.0, 0);
D_symbol(Symb, x0, y0, line_color, fill_color);
if (line_width > 0)
D_line_width(0);
G_free(Symb);
G_free(line_color);
G_free(fill_color);
return 0;
}
int draw_n_arrow(double east, double north, double rotation, char *lbl,
int rot_with_text, double fontsize, char *n_arrow_num,
double line_width)
{
double x_pos, y_pos;
double t, b, l, r;
double tt, tb, tl, tr; /* text box */
SYMBOL *Symb;
RGBA_Color *line_color, *fill_color;
int R, G, B;
double x0, y0;
char icon[64];
double symbol_size;
/* Establish text size */
if (fontsize > 0)
D_text_size(fontsize, fontsize);
D_setup_unity(0);
D_get_src(&t, &b, &l, &r);
x_pos = l + (int)(east * (r - l) / 100.);
y_pos = t + (int)((100. - north) * (b - t) / 100.);
if (line_width > 0)
D_line_width(line_width);
if (fontsize > 0) {
/* draw the label (default "N") */
if (rot_with_text)
D_text_rotation(rotation * 180.0 / M_PI);
D_get_text_box(lbl, &tt, &tb, &tl, &tr);
D_use_color(text_color);
/* positions manually tuned */
switch (n_arrow_num[0]) {
case '1':
D_pos_abs(x_pos - sin(rotation) * 50 - (tr + tl) / 2,
y_pos - cos(rotation) * 50 - (tb + tt) / 2);
D_text(lbl);
break;
case '3':
D_pos_abs(x_pos - sin(rotation) * 60 - (tr + tl) / 2,
y_pos - cos(rotation) * 60 - (tb + tt) / 2);
D_text(lbl);
break;
case '4':
D_pos_abs(x_pos - sin(rotation) * 45 - (tr + tl) / 2,
y_pos - cos(rotation) * 45 - (tb + tt) / 2);
D_text(lbl);
break;
case '7':
D_pos_abs(x_pos - sin(rotation) * 70 - (tr + tl) / 2,
y_pos - cos(rotation) * 70 - (tb + tt) / 2);
D_text(lbl);
break;
case '8':
D_pos_abs(x_pos - sin(rotation) * 60 - (tr + tl) / 2,
y_pos - cos(rotation) * 60 - (tb + tt) / 2);
D_text(lbl);
break;
case '9':
D_pos_abs(x_pos - sin(rotation) * 55 - (tr + tl) / 2,
y_pos - cos(rotation) * 55 - (tb + tt) / 2);
D_text(lbl);
break;
case 'f':
D_pos_abs(x_pos - sin(rotation) * 55 - (tr + tl) / 2,
y_pos - cos(rotation) * 55 - (tb + tt) / 2);
D_text(lbl);
break;
case 'b':
D_pos_abs(x_pos - sin(rotation) * 48.5 - (tr + tl) / 2,
y_pos - cos(rotation) * 48.5 - (tb + tt) / 2);
D_text(lbl);
break;
case 'a':
D_pos_abs(x_pos - sin(rotation) * 50 - (tr + tl) / 2,
y_pos - cos(rotation) * 50 - (tb + tt) / 2);
D_text(lbl);
break;
case 's':
D_pos_abs(x_pos - sin(rotation) * 50 - (tr + tl) / 2,
y_pos - cos(rotation) * 50 - (tb + tt) / 2);
D_text(lbl);
break;
case '2':
case '5':
case '6':
break;
default:
G_fatal_error(_("Could not parse symbol"));
}
}
/* display the north arrow symbol */
line_color = G_malloc(sizeof(RGBA_Color));
fill_color = G_malloc(sizeof(RGBA_Color));
if (D_color_number_to_RGB(fg_color, &R, &G, &B) == 0)
line_color->a = RGBA_COLOR_TRANSPARENT;
else
line_color->a = RGBA_COLOR_OPAQUE;
line_color->r = (unsigned char)R;
line_color->g = (unsigned char)G;
line_color->b = (unsigned char)B;
if (D_color_number_to_RGB(bg_color, &R, &G, &B) == 0)
fill_color->a = RGBA_COLOR_TRANSPARENT;
else
fill_color->a = RGBA_COLOR_OPAQUE;
fill_color->r = (unsigned char)R;
fill_color->g = (unsigned char)G;
fill_color->b = (unsigned char)B;
/* sizes manually tuned */
switch (n_arrow_num[0]) {
case '1':
symbol_size = 35.;
break;
case '2':
symbol_size = 19.;
break;
case '3':
symbol_size = 20.;
break;
case '4':
symbol_size = 15.;
break;
case '5':
case '6':
symbol_size = 14.;
break;
case '7':
symbol_size = 23.;
break;
case '8':
case '9':
symbol_size = 17.;
break;
case 'b':
symbol_size = 80.;
break;
case 'f':
symbol_size = 100.;
break;
case 'a':
if (n_arrow_num[5] == '2')
symbol_size = 53.;
else
symbol_size = 70.;
break;
case 's':
symbol_size = 80.;
break;
default:
G_fatal_error(_("Could not parse symbol"));
}
x0 = D_d_to_u_col(x_pos);
y0 = D_d_to_u_row(y_pos);
if (n_arrow_num[0] == 'b')
strcpy(icon, "n_arrows/basic_compass");
else if (n_arrow_num[0] == 'f')
strcpy(icon, "n_arrows/fancy_compass");
else if (n_arrow_num[0] == 'a' && n_arrow_num[5] == '1')
strcpy(icon, "basic/arrow1");
else if (n_arrow_num[0] == 'a' && n_arrow_num[5] == '2')
strcpy(icon, "basic/arrow2");
else if (n_arrow_num[0] == 'a' && n_arrow_num[5] == '3')
strcpy(icon, "basic/arrow3");
else if (n_arrow_num[0] == 's')
strcpy(icon, "extra/4pt_star");
else {
strcpy(icon, "n_arrows/n_arrow");
strncat(icon, n_arrow_num, 32);
}
Symb = S_read(icon);
if (!Symb)
G_fatal_error(_("Could not read symbol \"%s\""), icon);
S_stroke(Symb, symbol_size, rotation * (180 / M_PI), 0);
D_symbol(Symb, x0, y0, line_color, fill_color);
if (line_width > 0)
D_line_width(0);
G_free(Symb);
G_free(line_color);
G_free(fill_color);
return 0;
}
