exposurses

WINDOW *iso_win;
WINDOW *shutter_win;
WINDOW *aperture_win;

void selection(char *name);
void print_in_middle(WINDOW *win, int starty, int startx, int width, char *string, chtype color);
int exposure(int iso);

double shutter(int exposure, double aperture);
double aperture(int exposure, double shutter);
int nearest_match(double x, int menu);
double fraction_to_double(char *fraction);
/* No one will ever need more than 9 bytes! */
char exposure_sel[9] = "";
char iso_sel[9] = "";
char shutter_sel[9] = "";
char aperture_sel[9] = "";
int selection_counter = 1;
int menu_counter = 1;

int main() {
	int c;
	MENU **menu;
	WINDOW **win;
	int i;
	int n_exposure;
	int n_iso;
	int n_shutter;
	int n_aperture;



	/* Initialize curses */
	initscr();
	start_color();
	cbreak();
	noecho();
	keypad(stdscr, TRUE);

	post_menu(aperture_menu);
	wrefresh(exposure_win);
	wrefresh(iso_win);
	wrefresh(shutter_win);
	wrefresh(aperture_win);

	attron(COLOR_PAIR(2));
	mvprintw(LINES - 2, 0, "Select EV");
	/*mvprintw(LINES - 2, 0, "Select ISO and then one of Shutter/Aperture to calculate other of Shutter/Aperture");*/
	mvprintw(LINES - 1, 0, "Arrow keys to navigate, Enter to select, Q to exit");
	attroff(COLOR_PAIR(2));
	refresh();

	/* set default menu */
	menu = &exposure_menu;
	win = &exposure_win;

	while((c = getch()) != 81) { /* 81 is Q */
		switch(c) {
			case KEY_LEFT:
				if (selection_counter > 2) {
					menu_counter = 3;






					menu = &shutter_menu;
					win = &shutter_win;





				}
				break;
			case KEY_RIGHT:
				if (selection_counter > 2) {
					menu_counter = 4;










					menu = &aperture_menu;
					win = &aperture_win;

				}
				break;
			case KEY_DOWN:
				menu_driver(*menu, REQ_DOWN_ITEM);
				break;
			case KEY_UP:
				menu_driver(*menu, REQ_UP_ITEM);
				break;
			case 10: { /* ENTER */
				ITEM *cur;
				void (*p)(char *);

				cur = current_item(*menu);
				p = item_userptr(cur);
				/* Learning notes - Don't understand this bit */
				p((char *)item_name(cur));
				
				switch (selection_counter) {
					case 1: { /* Exposure selected */
						selection_counter += 1;
						menu_counter += 1;
						move(LINES - 2, 0);
						clrtoeol();
						mvprintw(LINES - 2, 0, "Select ISO");
						refresh();
						menu = &iso_menu;
						win = &iso_win;
					}

					break;
					case 2: { /* ISO Selected */
						selection_counter += 1;
						menu_counter += 1;

						move(LINES - 2, 0);
						clrtoeol();





						mvprintw(LINES - 2, 0, "Select Shutter or Aperture");
						refresh();
						menu = &shutter_menu;
						win = &shutter_win;
					}
					break;
					case 3: { /* Shutter or Aperture selected */
						if (strcmp("", shutter_sel) == 0) {
							char aperture_sel_[4] = "";
							strncpy(aperture_sel_, aperture_sel+2, 3);
							/* Using menu_driver to go up/down to force refresh and correct highlighting */
							menu_driver(shutter_menu, REQ_SCR_UPAGE);
							menu_driver(shutter_menu, REQ_SCR_DPAGE);
							/* There is probably a nicer way to format the below */
							set_menu_pattern(
								shutter_menu,
								shutter_array[nearest_match(
									shutter(exposure(atoi(iso_sel)), strtod(aperture_sel_, NULL)),
									2
								)]
							);
							menu_driver(shutter_menu, REQ_DOWN_ITEM);
							menu_driver(shutter_menu, REQ_UP_ITEM);
							wrefresh(shutter_win);
						}
						if (strcmp("", aperture_sel) == 0) {
							menu_driver(aperture_menu, REQ_SCR_UPAGE);
							menu_driver(aperture_menu, REQ_SCR_DPAGE);
							set_menu_pattern(
								aperture_menu,
								aperture_array[nearest_match(
									aperture(exposure(atoi(iso_sel)), fraction_to_double(shutter_sel)),
									3
								)]
							);
							menu_driver(aperture_menu, REQ_DOWN_ITEM);
							menu_driver(aperture_menu, REQ_UP_ITEM);
							wrefresh(aperture_win);
						}
						/* clear the selections for next time */

						strcpy(iso_sel, "");
						strcpy(shutter_sel, "");
						strcpy(aperture_sel, "");
						/* And set defaults back to start */
						selection_counter = 1;
						menu_counter = 1;
						menu = &exposure_menu;
						win = &exposure_win;
						move(LINES - 2, 0);
						clrtoeol();
						mvprintw(LINES - 2, 0, "Select EV");
						refresh();
					}
					break;
				}
			}
			break;
		}
		wrefresh(*win);
	}	
	/* Unpost and free all the memory taken up */
	unpost_menu(exposure_menu);
	unpost_menu(iso_menu);
	unpost_menu(shutter_menu);
	unpost_menu(aperture_menu);
	free_menu(exposure_menu);
	free_menu(iso_menu);
	free_menu(shutter_menu);
	free_menu(aperture_menu);

	wattroff(win, color);
	refresh();
}

void selection(char *name) {
	switch(menu_counter) {
		case 1:
			strcpy(exposure_sel, name);
			break;
		case 2:
			strcpy(iso_sel, name);
			break;
		case 3:
			strcpy(shutter_sel, name);
			break;
		case 4:
			strcpy(aperture_sel, name);
			break;
	}
}

int exposure (int iso) {
	int ev100;

		/*then split*/
		strncpy(denominator, fraction+2, 5);
		fraction_as_db = 1 / strtod(denominator, NULL);
	}
	else {
		fraction_as_db = strtod(fraction, NULL);
	}
	return fraction_as_db;
}

/* Debug lines
 * sprintf(temp, "%f", x);
 * mvprintw(LINES - 4, 0, temp);
 * refresh();*/