release/src/router/libncurses/doc/html/man/form_hook.3x.html

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  31   * @Id: form_hook.3x,v 1.11 2010/12/04 18:40:45 tom Exp @
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  35 <TITLE>form_hook 3x</TITLE>
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  40 <H1>form_hook 3x</H1>
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  42 <PRE>
  43 <!-- Manpage converted by man2html 3.0.1 -->
  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>
  45
  46
  47
  48
  49 </PRE>
  50 <H2>NAME</H2><PRE>
  51        <STRONG>form_hook</STRONG> - set hooks for automatic invocation by applica-
  52        tions
  53
  54
  55 </PRE>
  56 <H2>SYNOPSIS</H2><PRE>
  57        <STRONG>#include</STRONG> <STRONG>&lt;form.h&gt;</STRONG>
  58        int set_field_init(FORM *form, Form_Hook func);
  59        Form_Hook field_init(const FORM *form);
  60        int set_field_term(FORM *form, Form_Hook func);
  61        Form_Hook field_term(const FORM *form);
  62        int set_form_init(FORM *form, Form_Hook func);
  63        Form_Hook form_init(const FORM *form);
  64        int set_form_term(FORM *form, Form_Hook func);
  65        Form_Hook form_term(const FORM *form);
  66
  67
  68 </PRE>
  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>form_driver</STRONG>.
  73
  74        The function <STRONG>set_field_init</STRONG> sets a hook to  be  called  at
  75        form-post  time  and  each time the selected field changes
  76        (after the change).  <STRONG>field_init</STRONG> returns the current  field
  77        init hook, if any (<STRONG>NULL</STRONG> if there is no such hook).
  78
  79        The  function  <STRONG>set_field_term</STRONG>  sets a hook to be called at
  80        form-unpost time and each time the selected field  changes
  81        (before the change).  <STRONG>field_term</STRONG> returns the current field
  82        term hook, if any (<STRONG>NULL</STRONG> if there is no such hook).
  83
  84        The function <STRONG>set_form_init</STRONG> sets a hook  to  be  called  at
  85        form-post  time  and  just  after a page change once it is
  86        posted.  <STRONG>form_init</STRONG> returns the current form init hook,  if
  87        any (<STRONG>NULL</STRONG> if there is no such hook).
  88
  89        The  function  <STRONG>set_form_term</STRONG>  sets  a hook to be called at
  90        form-unpost time and just before a page change once it  is
  91        posted.   <STRONG>form_init</STRONG> returns the current form term hook, if
  92        any (<STRONG>NULL</STRONG> if there is no such hook).
  93
  94
  95 </PRE>
  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:
  99
 100        <STRONG>E_OK</STRONG> The routine succeeded.
 101
 102        <STRONG>E_SYSTEM_ERROR</STRONG>
 103             System error occurred (see <STRONG>errno</STRONG>).
 104
 105
 106 </PRE>
 107 <H2>SEE ALSO</H2><PRE>
 108        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>.
 109
 110
 111 </PRE>
 112 <H2>NOTES</H2><PRE>
 113        The header file <STRONG>&lt;form.h&gt;</STRONG> automatically includes the header
 114        file <STRONG>&lt;curses.h&gt;</STRONG>.
 115
 116
 117 </PRE>
 118 <H2>PORTABILITY</H2><PRE>
 119        These routines emulate the System V forms  library.   They
 120        were not supported on Version 7 or BSD versions.
 121
 122
 123 </PRE>
 124 <H2>AUTHORS</H2><PRE>
 125        Juergen  Pfeifer.   Manual  pages  and  adaptation for new
 126        curses by Eric S. Raymond.
 127
 128
 129
 130                                                           <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
 131 </PRE>
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