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30 * @Id: form_hook.3x,v 1.11 2010/12/04 18:40:45 tom Exp @
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42 <H1 class="no-header">form_hook 3x</H1>
44 <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG> <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
49 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
50 <STRONG>form_hook</STRONG> - set hooks for automatic invocation by applica-
54 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
55 <STRONG>#include</STRONG> <STRONG><form.h></STRONG>
56 int set_field_init(FORM *form, Form_Hook func);
57 Form_Hook field_init(const FORM *form);
58 int set_field_term(FORM *form, Form_Hook func);
59 Form_Hook field_term(const FORM *form);
60 int set_form_init(FORM *form, Form_Hook func);
61 Form_Hook form_init(const FORM *form);
62 int set_form_term(FORM *form, Form_Hook func);
63 Form_Hook form_term(const FORM *form);
66 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
67 These functions make it possible to set hook functions to
68 be called at various points in the automatic processing of
69 input event codes by <STRONG>form_driver</STRONG>.
71 The function <STRONG>set_field_init</STRONG> sets a hook to be called at
72 form-post time and each time the selected field changes
73 (after the change). <STRONG>field_init</STRONG> returns the current field
74 init hook, if any (<STRONG>NULL</STRONG> if there is no such hook).
76 The function <STRONG>set_field_term</STRONG> sets a hook to be called at
77 form-unpost time and each time the selected field changes
78 (before the change). <STRONG>field_term</STRONG> returns the current field
79 term hook, if any (<STRONG>NULL</STRONG> if there is no such hook).
81 The function <STRONG>set_form_init</STRONG> sets a hook to be called at
82 form-post time and just after a page change once it is
83 posted. <STRONG>form_init</STRONG> returns the current form init hook, if
84 any (<STRONG>NULL</STRONG> if there is no such hook).
86 The function <STRONG>set_form_term</STRONG> sets a hook to be called at
87 form-unpost time and just before a page change once it is
88 posted. <STRONG>form_init</STRONG> returns the current form term hook, if
89 any (<STRONG>NULL</STRONG> if there is no such hook).
92 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
93 Routines that return pointers return <STRONG>NULL</STRONG> on error. Other
94 routines return one of the following:
96 <STRONG>E_OK</STRONG> The routine succeeded.
98 <STRONG>E_SYSTEM_ERROR</STRONG>
99 System error occurred (see <STRONG>errno</STRONG>).
102 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
103 <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>.
106 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
107 The header file <STRONG><form.h></STRONG> automatically includes the header
108 file <STRONG><curses.h></STRONG>.
111 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
112 These routines emulate the System V forms library. They
113 were not supported on Version 7 or BSD versions.
116 </PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
117 Juergen Pfeifer. Manual pages and adaptation for new
118 curses by Eric S. Raymond.
122 <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
126 <li><a href="#h2-NAME">NAME</a></li>
127 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
128 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
129 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
130 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
131 <li><a href="#h2-NOTES">NOTES</a></li>
132 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
133 <li><a href="#h2-AUTHORS">AUTHORS</a></li>