A menu item is visible if it appears in the subwindow of the posted menu to which it is connected. (Connecting and posting menus is described below.) Function item_visible enables your application program to determine if an item is visible.
SYNOPSIS
int item_visible (item) ITEM * item;If the item is connected to a posted menu and it appears in the menu subwindow, item_visible returns TRUE. Otherwise, it returns FALSE.
To check if the first menu item is currently visible on the display, you can write
int at_top (m) /* check visibility of first menu item */
MENU * m;
{
ITEM ** i = menu_items (m);
ITEM * firstitem = i[0];
return item_visible (firstitem);
}
For another example, see
``Counting the number of menu items''.