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31 * @Id: menu_hook.3x,v 1.6 1998/11/29 01:09:47 Rick.Ohnemus Exp @
35 <TITLE>menu_hook 3x</TITLE>
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44 <STRONG><A HREF="menu_hook.3x.html">menu_hook(3x)</A></STRONG> <STRONG><A HREF="menu_hook.3x.html">menu_hook(3x)</A></STRONG>
51 <STRONG>menu_hook</STRONG> - set hooks for automatic invocation by applica-
56 <H2>SYNOPSIS</H2><PRE>
57 <STRONG>#include</STRONG> <STRONG><menu.h></STRONG>
58 int set_item_init(MENU *menu, void (*func)(MENU *));
59 void (*)(MENU *) item_init(const MENU *menu);
60 int set_item_term(MENU *menu, void (*func)(MENU *));
61 void (*)(MENU *) item_term(const MENU *menu);
62 int set_menu_init(MENU *menu, void (*func)(MENU *));
63 void (*)(MENU *) menu_init(const MENU *menu);
64 int set_menu_term(MENU *menu, void (*func)(MENU *));
65 void (*)(MENU *) menu_term(const MENU *menu);
69 <H2>DESCRIPTION</H2><PRE>
70 These functions make it possible to set hook functions to
71 be called at various points in the automatic processing of
72 input event codes by <STRONG>menu_driver</STRONG>.
74 The function <STRONG>set_item_init</STRONG> sets a hook to be called at
75 menu-post time and each time the selected item changes
76 (after the change). <STRONG>item_init</STRONG> returns the current item
77 init hook, if any (<STRONG>NULL</STRONG> if there is no such hook).
79 The function <STRONG>set_item_term</STRONG> sets a hook to be called at
80 menu-unpost time and each time the selected item changes
81 (before the change). <STRONG>item_term</STRONG> returns the current item
82 term hook, if any (<STRONG>NULL</STRONG> if there is no such hook).
84 The function <STRONG>set_menu_init</STRONG> sets a hook to be called at
85 menu-post time and just after the top row on the menu
86 changes once it is posted. <STRONG>menu_init</STRONG> returns the current
87 menu init hook, if any (<STRONG>NULL</STRONG> if there is no such hook).
89 The function <STRONG>set_menu_term</STRONG> sets a hook to be called at
90 menu-unpost time and just before the top row on the menu
91 changes once it is posted. <STRONG>menu_term</STRONG> returns the current
92 menu term hook, if any (<STRONG>NULL</STRONG> if there is no such hook).
96 <H2>RETURN VALUE</H2><PRE>
97 Routines that return pointers return <STRONG>NULL</STRONG> on error. Other
98 routines return one of the following:
100 <STRONG>E_OK</STRONG> The routine succeeded.
102 <STRONG>E_SYSTEM_ERROR</STRONG>
103 System error occurred (see <STRONG>errno</STRONG>).
107 <H2>SEE ALSO</H2><PRE>
108 <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="menu.3x.html">menu(3x)</A></STRONG>.
113 The header file <STRONG><menu.h></STRONG> automatically includes the header
114 file <STRONG><curses.h></STRONG>.
118 <H2>PORTABILITY</H2><PRE>
119 These routines emulate the System V menu library. They
120 were not supported on Version 7 or BSD versions.
124 <H2>AUTHORS</H2><PRE>
125 Juergen Pfeifer. Manual pages and adaptation for new
126 curses by Eric S. Raymond.
130 <STRONG><A HREF="menu_hook.3x.html">menu_hook(3x)</A></STRONG>
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