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Copyright 1989 AT&T
Portions Copyright (c) 1996, Sun Microsystems, Inc. All Rights Reserved.
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form_hook, set_form_init, form_init, set_form_term, form_term, set_field_init, field_init, set_field_term, field_term - assign application-specific routines for invocation by forms

cc [ flag... ] file... -lform  -lcurses  [ library... ]
#include <form.h>



int set_form_init(FORM *form, void (*func)(FORM*));

void (*form_init)(FORM *form);

int set_form_term(FORM *form, void (*func)(FORM*));

void (*form_term)(FORM *form);

int set_field_init(FORM *form, void (*func)(FORM*));

void (*field_init)(FORM *form);

int set_field_term(FORM *form, void (*func)(FORM*));

void (*field_term)(FORM *form);

These routines allow the programmer to assign application specific routines to be executed automatically at initialization and termination points in the forms application. The user need not specify any application-defined initialization or termination routines at all, but they may be helpful for displaying messages or page numbers and other chores.

set_form_init() assigns an application-defined initialization function to be called when the form is posted and just after a page change. form_init() returns a pointer to the initialization function, if any.

set_form_term() assigns an application-defined function to be called when the form is unposted and just before a page change. form_term() returns a pointer to the function, if any.

set_field_init() assigns an application-defined function to be called when the form is posted and just after the current field changes. field_init() returns a pointer to the function, if any.

set_field_term() assigns an application-defined function to be called when the form is unposted and just before the current field changes. field_term() returns a pointer to the function, if any.

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

E_SYSTEM_ERROR

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

MT-Level Unsafe

curses (3CURSES), forms (3CURSES), attributes (7)

The header <form.h> automatically includes the headers <eti.h> and <curses.h>.