NAME

       form_win - make and break form window and subwindow associations

SYNOPSIS

       #include <form.h>

       int set_form_win(FORM *form, WINDOW *win);
       WINDOW *form_win(const FORM *form);

       int set_form_sub(FORM *form, WINDOW *sub);
       WINDOW *form_sub(const FORM *form);

       int scale_form(const FORM *form, int *rows, int *columns);

DESCRIPTION

       Every  form  has an associated pair of curses windows.  The form window displays any title
       and border associated with the window; the form subwindow displays the items of  the  form
       that are currently available for selection.

       The  first  four  functions  get and set those windows.  It is not necessary to set either
       window; by default, the driver code uses stdscr for both.

       In the set_ functions, window argument of NULL is treated as though  it  were  stsdcr.   A
       form  argument of NULL is treated as a request to change the system default form window or
       subwindow.

       The function scale_form returns the minimum size required for the subwindow of form.

RETURN VALUE

       Routines that return pointers return NULL on  error.   Routines  that  return  an  integer
       return one of the following error codes:

       E_OK The routine succeeded.

       E_SYSTEM_ERROR
            System error occurred (see errno(3)).

       E_BAD_ARGUMENT
            Routine detected an incorrect or out-of-range argument.

       E_POSTED
            The form has already been posted.

       E_NOT_CONNECTED
            No items are connected to the form.

SEE ALSO

       ncurses(3NCURSES), curses_variables(3NCURSES), form(3FORM).

NOTES

       The header file <form.h> automatically includes the header file <curses.h>.

PORTABILITY

       These  routines  emulate the System V forms library.  They were not supported on Version 7
       or BSD versions.

AUTHORS

       Juergen Pfeifer.  Manual pages and adaptation for new curses by Eric S. Raymond.