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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><!-- * t **************************************************************************** * Copyright (c) 1998 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: menu_hook.3x,v 1.6 1998/11/29 01:09:47 Rick.Ohnemus Exp @--><HTML><HEAD><TITLE>menu_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>menu_hook 3x</H1><HR><PRE><!-- Manpage converted by man2html 3.0.1 --><STRONG><A HREF="menu_hook.3x.html">menu_hook(3x)</A></STRONG> <STRONG><A HREF="menu_hook.3x.html">menu_hook(3x)</A></STRONG></PRE><H2>NAME</H2><PRE> <STRONG>menu_hook</STRONG> - set hooks for automatic invocation by applica- tions</PRE><H2>SYNOPSIS</H2><PRE> <STRONG>#include</STRONG> <STRONG><menu.h></STRONG> int set_item_init(MENU *menu, void (*func)(MENU *)); void (*)(MENU *) item_init(const MENU *menu); int set_item_term(MENU *menu, void (*func)(MENU *)); void (*)(MENU *) item_term(const MENU *menu); int set_menu_init(MENU *menu, void (*func)(MENU *)); void (*)(MENU *) menu_init(const MENU *menu); int set_menu_term(MENU *menu, void (*func)(MENU *)); void (*)(MENU *) menu_term(const MENU *menu);</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>menu_driver</STRONG>. The function <STRONG>set_item_init</STRONG> sets a hook to be called at menu-post time and each time the selected item changes (after the change). <STRONG>item_init</STRONG> returns the current item init hook, if any (<STRONG>NULL</STRONG> if there is no such hook). The function <STRONG>set_item_term</STRONG> sets a hook to be called at menu-unpost time and each time the selected item changes (before the change). <STRONG>item_term</STRONG> returns the current item term hook, if any (<STRONG>NULL</STRONG> if there is no such hook). The function <STRONG>set_menu_init</STRONG> sets a hook to be called at menu-post time and just after the top row on the menu changes once it is posted. <STRONG>menu_init</STRONG> returns the current menu init hook, if any (<STRONG>NULL</STRONG> if there is no such hook). The function <STRONG>set_menu_term</STRONG> sets a hook to be called at menu-unpost time and just before the top row on the menu changes once it is posted. <STRONG>menu_term</STRONG> returns the current menu 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="menu.3x.html">menu(3x)</A></STRONG>.</PRE><H2>NOTES</H2><PRE> The header file <STRONG><menu.h></STRONG> automatically includes the header file <STRONG><curses.h></STRONG>.</PRE><H2>PORTABILITY</H2><PRE> These routines emulate the System V menu 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="menu_hook.3x.html">menu_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>⌨️ 快捷键说明
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