Function map_exposed

win/X11/winmap.c:1285–1355

* Map window expose callback. */ ARGSUSED*/

 */
/*ARGSUSED*/
static void
map_exposed(Widget w, XtPointer client_data, /* unused */
            XtPointer widget_data) /* expose event from Window widget */
{
    int x, y;
    struct xwindow *wp;
    struct map_info_t *map_info;
    unsigned width, height;
    int start_row, stop_row, start_col, stop_col;
    XExposeEvent *event = (XExposeEvent *) widget_data;
    int t_height, t_width; /* tile/text height & width */

    nhUse(client_data);

    if (!XtIsRealized(w) || event->count > 0)
        return;

    wp = find_widget(w);
    map_info = wp->map_information;
    if (wp->keep_window && !map_info)
        return;
    /*
     * The map is sent an expose event when the viewport resizes.  Make sure
     * that the cursor is still in the viewport after the resize.
     */
    map_check_size_change(wp);

    if (event) { /* called from button-event */
        x = event->x;
        y = event->y;
        width = event->width;
        height = event->height;
    } else {
        x = 0;
        y = 0;
        width = wp->pixel_width;
        height = wp->pixel_height;
    }
    /*
     * Convert pixels into INCLUSIVE text rows and columns.
     */
    if (map_info->is_tile) {
        t_height = map_info->tile_map.square_height;
        t_width = map_info->tile_map.square_width;
    } else {
        t_height = map_info->text_map.square_height;
        t_width = map_info->text_map.square_width;
    }
    start_row = y / t_height;
    stop_row = ((y + height) / t_height) + 1;

    start_col = x / t_width;
    stop_col = ((x + width) / t_width) + 1;

#ifdef VERBOSE
    printf("map_exposed: x = %d, y = %d, width = %d, height = %d\n", x, y,
           width, height);
    printf("chars %d x %d, rows %d to %d, columns %d to %d\n", t_height,