ident_win.c

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#include <string.h>
#include <grass/raster.h>
#include <grass/display.h>

int ident_win(char *cur_pad)
{
    char **list;
    char **pads;
    int count;
    int closest;
    int npads;
    int p;
    int stat;
    int x, y, t, b, l, r;
    int button;
    int gotone;

    /* Get list of pads (windows) */
    R_pad_list(&pads, &npads);

    button = 1;

    x = (R_screen_rite() + R_screen_left()) / 2;
    y = (R_screen_top() + R_screen_bot()) / 2;

    while (button == 1) {
        closest = 9999999;
        gotone = 0;

        R_get_location_with_pointer(&x, &y, &button);
        for (p = 0; p < npads; p++) {
            if (!strlen(pads[p]))
                continue;

            stat = R_pad_select(pads[p]);
            if (stat) {
                R_pad_perror("ERROR", stat);
                continue;
            }

            /* Check each window's "d_win" */
            stat = R_pad_get_item("d_win", &list, &count);
            if (stat) {
                R_pad_perror("ERROR", stat);
                continue;
            }
            sscanf(list[0], "%d %d %d %d", &t, &b, &l, &r);
            R_pad_freelist(list, count);

            /* If chosen point is outside pad window, continue */
            if (x < l || x > r || y < t || y > b)
                continue;

            /* If right edge closer than closest, the save pad name */
            if ((r - x) >= 0 && (r - x) < closest) {
                closest = r - x;
                gotone = 1;
                strcpy(cur_pad, pads[p]);
            }
        }

        if (gotone)
            D_set_cur_wind(cur_pad);
    }
    return (button);
}