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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | NOTES | PORTABILITY | AUTHORS | COLOPHON |
form_hook(3X) form_hook(3X)
form_hook - set hooks for automatic invocation by applications
#include <form.h>
int set_field_init(FORM *form, Form_Hook func);
Form_Hook field_init(const FORM *form);
int set_field_term(FORM *form, Form_Hook func);
Form_Hook field_term(const FORM *form);
int set_form_init(FORM *form, Form_Hook func);
Form_Hook form_init(const FORM *form);
int set_form_term(FORM *form, Form_Hook func);
Form_Hook form_term(const FORM *form);
These functions make it possible to set hook functions to be called
at various points in the automatic processing of input event codes by
form_driver.
The function set_field_init sets a hook to be called at form-post
time and each time the selected field changes (after the change).
field_init returns the current field init hook, if any (NULL if there
is no such hook).
The function set_field_term sets a hook to be called at form-unpost
time and each time the selected field changes (before the change).
field_term returns the current field term hook, if any (NULL if there
is no such hook).
The function set_form_init sets a hook to be called at form-post time
and just after a page change once it is posted. form_init returns
the current form init hook, if any (NULL if there is no such hook).
The function set_form_term sets a hook to be called at form-unpost
time and just before a page change once it is posted. form_init
returns the current form term hook, if any (NULL if there is no such
hook).
Routines that return pointers return NULL on error. Other routines
return one of the following:
E_OK The routine succeeded.
E_SYSTEM_ERROR
System error occurred (see errno).
curses(3X), form(3X).
The header file <form.h> automatically includes the header file
<curses.h>.
These routines emulate the System V forms library. They were not
supported on Version 7 or BSD versions.
Juergen Pfeifer. Manual pages and adaptation for new curses by Eric
S. Raymond.
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
⟨git://ncurses.scripts.mit.edu/ncurses.git⟩ on 2017-07-05. 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_hook(3X)