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#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <math.h>
#include <grass/gis.h>
#include <grass/display.h>
#include <grass/colors.h>
#include <grass/vector.h>
#include <grass/glocale.h>
#define WDTH 5
#define M_START 1
#define M_ADD 2
#define M_DEL 3
#define M_END 4
int display(struct Map_info *Map, struct boxlist *List,
const struct color_rgb *color);
int extract(struct Map_info *In, struct Map_info *Out, int type,
const struct color_rgb *color, const struct color_rgb *hcolor)
{
int i, button, mode, line;
int screen_x, screen_y, cur_screen_x, cur_screen_y;
double x1, y1, x2, y2;
struct boxlist *List, *CList;
struct bound_box box;
struct line_pnts *Points;
struct line_cats *Cats;
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
List = Vect_new_boxlist(0);
CList = Vect_new_boxlist(0);
/* box.T = PORT_DOUBLE_MAX;
box.B = -PORT_DOUBLE_MAX; */
Vect_get_map_box(In, &box);
mode = M_START;
G_message(_("Select vector(s) with mouse"));
G_message(_(" - L: draw box with left mouse button to select"));
G_message(
_(" - M: draw box with middle mouse button to remove from display"));
G_message(_(" - R: quit and save selected vectors to new map\n"));
while (1) {
G_message(_("L: add M: remove R: quit and save\n"));
if (mode == M_START) {
R_get_location_with_pointer(&screen_x, &screen_y, &button);
cur_screen_x = screen_x;
cur_screen_y = screen_y;
}
else {
R_get_location_with_box(cur_screen_x, cur_screen_y, &screen_x,
&screen_y, &button);
x1 = D_d_to_u_col((double)(cur_screen_x));
y1 = D_d_to_u_row((double)(cur_screen_y));
x2 = D_d_to_u_col((double)(screen_x));
y2 = D_d_to_u_row((double)(screen_y));
if (x1 < x2) {
box.W = x1;
box.E = x2;
}
else {
box.W = x2;
box.E = x1;
}
if (y1 < y2) {
box.S = y1;
box.N = y2;
}
else {
box.S = y2;
box.N = y1;
}
G_debug(1, "Box: N S E W = %f %f %f %f\n", box.N, box.S, box.E,
box.W);
}
/* TODO: check if line really intersects box, not only box intersects
* box */
switch (button) {
case 1:
if (mode == M_START) {
mode = M_ADD;
}
else if (mode == M_ADD) {
Vect_select_lines_by_box(In, &box, type, CList);
Vect_boxlist_append_boxlist(List, CList);
display(In, List, hcolor);
mode = M_START;
}
break;
case 2:
if (mode == M_START) {
mode = M_DEL;
}
else if (mode == M_DEL) {
Vect_select_lines_by_box(In, &box, type, CList);
Vect_boxlist_delete_boxlist(List, CList);
display(In, CList, color);
mode = M_START;
}
break;
case 3:
for (i = 0; i < List->n_values; i++) {
line = List->value[i];
type = Vect_read_line(In, Points, Cats, line);
Vect_write_line(Out, type, Points, Cats);
}
display(In, List, color);
return 1;
break;
}
};
Vect_destroy_boxlist(List);
Vect_destroy_boxlist(CList);
return 1;
}
int display(struct Map_info *Map, struct boxlist *List,
const struct color_rgb *color)
{
int i, j, line, type;
struct line_pnts *Points;
double msize;
msize = 10 * (D_d_to_u_col(2) - D_d_to_u_col(1)); /* do it better */
G_debug(1, "msize = %f\n", msize);
Points = Vect_new_line_struct();
D_RGB_color(color->r, color->g, color->b);
for (i = 0; i < List->n_values; i++) {
line = abs(List->id[i]);
type = Vect_read_line(Map, Points, NULL, line);
if (type & GV_POINTS)
D_plot_icon(Points->x[0], Points->y[0], G_ICON_CROSS, 0.0, msize);
else
for (j = 0; j < Points->n_points - 1; j++) {
D_move(Points->x[j], Points->y[j]);
D_cont(Points->x[j + 1], Points->y[j + 1]);
}
}
R_flush();
Vect_destroy_line_struct(Points);
return 0;
}
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