<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <!-- * t **************************************************************************** * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * **************************************************************************** * @Id: form_hook.3x,v 1.9 2007/02/24 17:34:18 tom Exp @ --> <HTML> <HEAD> <TITLE>form_hook 3x</TITLE> <link rev=made href="mailto:bug-ncurses@gnu.org"> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> </HEAD> <BODY> <H1>form_hook 3x</H1> <HR> <PRE> <!-- Manpage converted by man2html 3.0.1 --> <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG> <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG> </PRE> <H2>NAME</H2><PRE> <STRONG>form_hook</STRONG> - set hooks for automatic invocation by applica- tions </PRE> <H2>SYNOPSIS</H2><PRE> <STRONG>#include</STRONG> <STRONG><form.h></STRONG> 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); </PRE> <H2>DESCRIPTION</H2><PRE> These functions make it possible to set hook functions to be called at various points in the automatic processing of input event codes by <STRONG>form_driver</STRONG>. The function <STRONG>set_field_init</STRONG> sets a hook to be called at form-post time and each time the selected field changes (after the change). <STRONG>field_init</STRONG> returns the current field init hook, if any (<STRONG>NULL</STRONG> if there is no such hook). The function <STRONG>set_field_term</STRONG> sets a hook to be called at form-unpost time and each time the selected field changes (before the change). <STRONG>field_term</STRONG> returns the current field term hook, if any (<STRONG>NULL</STRONG> if there is no such hook). The function <STRONG>set_form_init</STRONG> sets a hook to be called at form-post time and just after a page change once it is posted. <STRONG>form_init</STRONG> returns the current form init hook, if any (<STRONG>NULL</STRONG> if there is no such hook). The function <STRONG>set_form_term</STRONG> sets a hook to be called at form-unpost time and just before a page change once it is posted. <STRONG>form_init</STRONG> returns the current form term hook, if any (<STRONG>NULL</STRONG> if there is no such hook). </PRE> <H2>RETURN VALUE</H2><PRE> Routines that return pointers return <STRONG>NULL</STRONG> on error. Other routines return one of the following: <STRONG>E_OK</STRONG> The routine succeeded. <STRONG>E_SYSTEM_ERROR</STRONG> System error occurred (see <STRONG>errno</STRONG>). </PRE> <H2>SEE ALSO</H2><PRE> <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>. </PRE> <H2>NOTES</H2><PRE> The header file <STRONG><form.h></STRONG> automatically includes the header file <STRONG><curses.h></STRONG>. </PRE> <H2>PORTABILITY</H2><PRE> These routines emulate the System V forms library. They were not supported on Version 7 or BSD versions. </PRE> <H2>AUTHORS</H2><PRE> Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S. Raymond. <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG> </PRE> <HR> <ADDRESS> Man(1) output converted with <a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a> </ADDRESS> </BODY> </HTML>