exposurses

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Comment:Make the add_menu and add_win subs work

I was still using the "variable pointers" technique, well trying to, and
it wasn't working for things like `set_menu_win` so pull this back out
into main.

Seg faults on exit, but haven't fixed that bit yet.

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SHA3-256: c2741c67e786c6913fc647bd699e16a141e9c1eece410e4ddee6f56776417f14
User & Date: base@atomicules.co.uk 2013-09-18 11:01:38
Original User & Date: base@atomicules.co.uk 2013-09-18 11:01:39
Context
2013-09-18
11:01
Fix menu numbering (from adding exposure menu in)

Didn't change functionality (it was still working), but just gives
better consistency to the code. check-in: 4a3cabadc2 user: base@atomicules.co.uk tags: origin/master, trunk

11:01
Make the add_menu and add_win subs work

I was still using the "variable pointers" technique, well trying to, and
it wasn't working for things like `set_menu_win` so pull this back out
into main.

Seg faults on exit, but haven't fixed that bit yet. check-in: c2741c67e7 user: base@atomicules.co.uk tags: origin/master, trunk

11:01
Try separate win and menu functions

instead of trying to wrap everything in one. This way I know I can
return the correct thing and I know I'm setting things as expected.

As opposed to previous attempt where I was (trying) to use variable
pointers, but with pointers to pointers, etc. And was obviously a bit
beyond me. check-in: e4268c4b4e user: base@atomicules.co.uk tags: origin/master, trunk

Changes
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Changes to exposurses.c.

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WINDOW *shutter_win;
WINDOW *aperture_win;

void selection(char *name);
void remove_menu(ITEM **items, MENU *men, int n);
void print_in_middle(WINDOW *win, int starty, int startx, int width, char *string, chtype color);
MENU *add_menu(char **array, ITEM **items, int n);
WINDOW *add_window(MENU *men, int xpos, char *title);
WINDOW *add_window(int xpos, char *title);
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] = "";
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	n_iso = ARRAY_SIZE(iso_array);
	n_shutter = ARRAY_SIZE(shutter_array);
	n_aperture = ARRAY_SIZE(aperture_array);
	exposure_menu = add_menu(exposure_array, exposure_items, n_exposure);
	iso_menu = add_menu(iso_array, iso_items, n_iso);
	shutter_menu = add_menu(shutter_array, shutter_items, n_shutter);
	aperture_menu = add_menu(aperture_array, aperture_items, n_aperture);
	exposure_win = add_window(exposure_menu, 4, "EV");
	iso_win = add_window(iso_menu, 45, "ISO");
	shutter_win = add_window(shutter_menu, 86, "Shutter");
	aperture_win = add_window(aperture_menu, 127, "Aperture");

	exposure_win = add_window(4, "EV");
	iso_win = add_window(45, "ISO");
	shutter_win = add_window(86, "Shutter");
	aperture_win = add_window(127, "Aperture");
	set_menu_win(exposure_menu, exposure_win);
	set_menu_win(iso_menu, iso_win);
	set_menu_win(shutter_menu, shutter_win);
	set_menu_win(aperture_menu, aperture_win);
	set_menu_sub(exposure_menu, derwin(exposure_win, 6, 38, 3, 1));
	set_menu_sub(iso_menu, derwin(iso_win, 6, 38, 3, 1));
	set_menu_sub(shutter_menu, derwin(shutter_win, 6, 38, 3, 1));
	set_menu_sub(aperture_menu, derwin(aperture_win, 6, 38, 3, 1));
	post_menu(exposure_menu);
	post_menu(iso_menu);
	post_menu(shutter_menu);
	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();
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	for(i = 0; i<n; ++i) {
		items[i] = new_item(array[i], array[i]);
		set_item_userptr(items[i], selection);
	}
	local_menu = new_menu((ITEM **)items);
	set_menu_format(local_menu, 5, 1);
	set_menu_mark(local_menu, " * ");
	post_menu(local_menu);
	return local_menu;
}

WINDOW *add_window(MENU *men, int xpos, char *title) {
WINDOW *add_window(int xpos, char *title) {
	WINDOW *local_win;

	local_win = newwin(10, 40, 4, xpos);
	keypad(local_win, TRUE);
	set_menu_win(*men, local_win);
	set_menu_sub(*men, derwin(local_win, 6, 38, 3, 1));
	box(local_win, 0, 0);
	print_in_middle(local_win, 1, 0, 40, title, COLOR_PAIR(1));
	mvwaddch(local_win, 2, 0, ACS_LTEE);
	mvwhline(local_win, 2, 1, ACS_HLINE, 38);
	mvwaddch(local_win, 2, 39, ACS_RTEE);
	wrefresh(local_win);
	return local_win;
}

void remove_menu(ITEM **items, MENU *men, int n) {
	int i;

	unpost_menu(men);
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