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31 * @Id: menu_hook.3x,v 1.15 2020/10/17 23:44:57 tom Exp @
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43 <H1 class="no-header">menu_hook 3X</H1>
45 <B><A HREF="menu_hook.3X.html">menu_hook(3X)</A></B> <B><A HREF="menu_hook.3X.html">menu_hook(3X)</A></B>
50 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
51 <B>menu_hook</B> - set hooks for automatic invocation by applications
54 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
55 <B>#include</B> <B><menu.h></B>
57 <B>int</B> <B>set_item_init(MENU</B> <B>*</B><I>menu</I><B>,</B> <B>Menu_Hook</B> <I>func);</I>
58 <B>Menu_Hook</B> <B>item_init(const</B> <B>MENU</B> <B>*</B><I>menu);</I>
60 <B>int</B> <B>set_item_term(MENU</B> <B>*</B><I>menu</I><B>,</B> <B>Menu_Hook</B> <I>func);</I>
61 <B>Menu_Hook</B> <B>item_term(const</B> <B>MENU</B> <B>*</B><I>menu);</I>
63 <B>int</B> <B>set_menu_init(MENU</B> <B>*</B><I>menu</I><B>,</B> <B>Menu_Hook</B> <I>func);</I>
64 <B>Menu_Hook</B> <B>menu_init(const</B> <B>MENU</B> <B>*</B><I>menu);</I>
66 <B>int</B> <B>set_menu_term(MENU</B> <B>*</B><I>menu</I><B>,</B> <B>Menu_Hook</B> <I>func);</I>
67 <B>Menu_Hook</B> <B>menu_term(const</B> <B>MENU</B> <B>*</B><I>menu);</I>
70 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
71 These functions make it possible to set hook functions to be called at
72 various points in the automatic processing of input event codes by
75 The function <B>set_item_init</B> sets a hook to be called at menu-post time
76 and each time the selected item changes (after the change). <B>item_init</B>
77 returns the current item init hook, if any (<B>NULL</B> if there is no such
80 The function <B>set_item_term</B> sets a hook to be called at menu-unpost time
81 and each time the selected item changes (before the change). <B>item_term</B>
82 returns the current item term hook, if any (<B>NULL</B> if there is no such
85 The function <B>set_menu_init</B> sets a hook to be called at menu-post time
86 and just after the top row on the menu changes once it is posted.
87 <B>menu_init</B> returns the current menu init hook, if any (<B>NULL</B> if there is
90 The function <B>set_menu_term</B> sets a hook to be called at menu-unpost time
91 and just before the top row on the menu changes once it is posted.
92 <B>menu_term</B> returns the current menu term hook, if any (<B>NULL</B> if there is
96 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
97 Routines that return pointers return <B>NULL</B> on error. Other routines
98 return one of the following:
100 <B>E_OK</B> The routine succeeded.
102 <B>E_SYSTEM_ERROR</B>
103 System error occurred (see <B>errno(3)</B>).
106 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
107 <B><A HREF="curses.3X.html">curses(3X)</A></B>, <B><A HREF="menu.3X.html">menu(3X)</A></B>.
110 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
111 The header file <B><menu.h></B> automatically includes the header file
112 <B><curses.h></B>.
115 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
116 These routines emulate the System V menu library. They were not
117 supported on Version 7 or BSD versions.
120 </PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
121 Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S.
126 <B><A HREF="menu_hook.3X.html">menu_hook(3X)</A></B>
130 <li><a href="#h2-NAME">NAME</a></li>
131 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
132 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
133 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
134 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
135 <li><a href="#h2-NOTES">NOTES</a></li>
136 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
137 <li><a href="#h2-AUTHORS">AUTHORS</a></li>