form_page(3x) — Linux manual page

form_page(3X)                                               form_page(3X)

NAME         top

       form_page - set and get form page number

SYNOPSIS         top

       #include <form.h>

       int set_current_field(FORM *form, FIELD *field);
       FIELD *current_field(const FORM *form);

       int unfocus_current_field(FORM *form);

       int set_form_page(FORM *form, int n);
       int form_page(const FORM *form);

       int field_index(const FIELD *field);

DESCRIPTION         top

       The function set_current_field sets the current field of the given
       form; current_field returns the current field of the given form.

       The function unfocus_current_field removes the focus from the
       current field of the form.  In such state, inquiries via
       current_field shall return a NULL pointer.

       The function set_form_page sets the form's page number (goes to
       page n of the form).

       The function form_page returns the form's current page number.

       The function field_index returns the index of the field in the
       field array of the form it is connected to.  It returns ERR if the
       argument is the null pointer or the field is not connected.

RETURN VALUE         top

       Except for form_page, each routine returns one of the following:

       E_OK The routine succeeded.

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

       E_BAD_STATE
            Routine was called from an initialization or termination
            function.

       E_INVALID_FIELD
            Contents of a field are not valid.

       E_REQUEST_DENIED
            The form driver could not process the request.

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

SEE ALSO         top

       curses(3X), form(3X).

NOTES         top

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

PORTABILITY         top

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

       The unfocus_current_field function is an ncurses extension.

AUTHORS         top

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

COLOPHON         top

       This page is part of the ncurses (new curses) project.
       Information about the project can be found at 
       ⟨https://www.gnu.org/software/ncurses/ncurses.html⟩.  If you have a
       bug report for this manual page, send it to
       bug-ncurses-request@gnu.org.  This page was obtained from the
       project's upstream Git mirror of the CVS repository
       ⟨https://github.com/mirror/ncurses.git⟩ on 2025-08-11.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-03-12.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there is
       a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

                                                            form_page(3X)

HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.