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  30   * @Id: form.3x,v 1.29 2017/02/18 16:46:53 tom Exp @
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  42 <H1 class="no-header">form 3x</H1>
  43 <PRE>
  44 <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>                                                       <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>
  45
  46
  47
  48
  49 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
  50        <STRONG>form</STRONG> - curses extension for programming forms
  51
  52
  53 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  54        <STRONG>#include</STRONG> <STRONG>&lt;form.h&gt;</STRONG>
  55
  56
  57 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  58        The  <STRONG>form</STRONG> library provides terminal-independent facilities
  59        for composing form screens  on  character-cell  terminals.
  60        The  library  includes:  field  routines, which create and
  61        modify form fields; and form routines, which group  fields
  62        into forms, display forms on the screen, and handle inter-
  63        action with the user.
  64
  65        The <STRONG>form</STRONG> library uses the <STRONG>curses</STRONG> libraries.   To  use  the
  66        <STRONG>form</STRONG> library, link with the options <STRONG>-lform</STRONG> <STRONG>-lcurses</STRONG>.
  67
  68        Your program should set up the locale, e.g.,
  69
  70             <STRONG>setlocale(LC_ALL,</STRONG> <STRONG>"");</STRONG>
  71
  72        so that input/output processing will work.
  73
  74        A  curses  initialization  routine such as <STRONG>initscr</STRONG> must be
  75        called before using any of these functions.
  76
  77
  78 </PRE><H3><a name="h3-Current-Default-Values-for-Field-Attributes">Current Default Values for Field Attributes</a></H3><PRE>
  79        The <STRONG>form</STRONG> library  maintains  a  default  value  for  field
  80        attributes.   You  can  get or set this default by calling
  81        the appropriate <STRONG>set_</STRONG> or  retrieval  routine  with  a  <STRONG>NULL</STRONG>
  82        field pointer.  Changing this default with a <STRONG>set_</STRONG> function
  83        affects future field creations, but does  not  change  the
  84        rendering of fields already created.
  85
  86
  87 </PRE><H3><a name="h3-Routine-Name-Index">Routine Name Index</a></H3><PRE>
  88        The  following  table lists each <STRONG>form</STRONG> routine and the name
  89        of the manual page on which it is described.
  90
  91        <STRONG>curses</STRONG> Routine Name     Manual Page Name
  92        --------------------------------------------------
  93        current_field           <STRONG><A HREF="form_page.3x.html">form_page(3x)</A></STRONG>
  94        data_ahead              <STRONG><A HREF="form_data.3x.html">form_data(3x)</A></STRONG>
  95        data_behind             <STRONG><A HREF="form_data.3x.html">form_data(3x)</A></STRONG>
  96        dup_field               <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>
  97        dynamic_field_info      <STRONG><A HREF="form_field_info.3x.html">form_field_info(3x)</A></STRONG>
  98        field_arg               <STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG>
  99        field_back              <STRONG><A HREF="form_field_attributes.3x.html">form_field_attributes(3x)</A></STRONG>
 100        field_buffer            <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG>
 101        field_count             <STRONG><A HREF="form_field.3x.html">form_field(3x)</A></STRONG>
 102        field_fore              <STRONG><A HREF="form_field_attributes.3x.html">form_field_attributes(3x)</A></STRONG>
 103        field_index             <STRONG><A HREF="form_page.3x.html">form_page(3x)</A></STRONG>
 104        field_info              <STRONG><A HREF="form_field_info.3x.html">form_field_info(3x)</A></STRONG>
 105        field_init              <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
 106        field_just              <STRONG><A HREF="form_field_just.3x.html">form_field_just(3x)</A></STRONG>
 107        field_opts              <STRONG><A HREF="form_field_opts.3x.html">form_field_opts(3x)</A></STRONG>
 108        field_opts_off          <STRONG><A HREF="form_field_opts.3x.html">form_field_opts(3x)</A></STRONG>
 109        field_opts_on           <STRONG><A HREF="form_field_opts.3x.html">form_field_opts(3x)</A></STRONG>
 110        field_pad               <STRONG><A HREF="form_field_attributes.3x.html">form_field_attributes(3x)</A></STRONG>
 111        field_status            <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG>
 112        field_term              <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
 113        field_type              <STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG>
 114
 115        field_userptr           <STRONG><A HREF="form_field_userptr.3x.html">form_field_userptr(3x)</A></STRONG>
 116        form_driver             <STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG>
 117        form_driver_w           <STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG>*
 118        form_fields             <STRONG><A HREF="form_field.3x.html">form_field(3x)</A></STRONG>
 119        form_init               <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
 120        form_opts               <STRONG><A HREF="form_opts.3x.html">form_opts(3x)</A></STRONG>
 121        form_opts_off           <STRONG><A HREF="form_opts.3x.html">form_opts(3x)</A></STRONG>
 122        form_opts_on            <STRONG><A HREF="form_opts.3x.html">form_opts(3x)</A></STRONG>
 123        form_page               <STRONG><A HREF="form_page.3x.html">form_page(3x)</A></STRONG>
 124        form_request_by_name    <STRONG><A HREF="form_requestname.3x.html">form_requestname(3x)</A></STRONG>
 125        form_request_name       <STRONG><A HREF="form_requestname.3x.html">form_requestname(3x)</A></STRONG>
 126        form_sub                <STRONG><A HREF="form_win.3x.html">form_win(3x)</A></STRONG>
 127        form_term               <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
 128        form_userptr            <STRONG><A HREF="form_userptr.3x.html">form_userptr(3x)</A></STRONG>
 129        form_win                <STRONG><A HREF="form_win.3x.html">form_win(3x)</A></STRONG>
 130        free_field              <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>
 131        free_fieldtype          <STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG>
 132        free_form               <STRONG><A HREF="form_new.3x.html">form_new(3x)</A></STRONG>
 133        link_field              <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>
 134        link_fieldtype          <STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG>
 135        move_field              <STRONG><A HREF="form_field.3x.html">form_field(3x)</A></STRONG>
 136        new_field               <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>
 137        new_fieldtype           <STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG>
 138        new_form                <STRONG><A HREF="form_new.3x.html">form_new(3x)</A></STRONG>
 139        new_page                <STRONG><A HREF="form_new_page.3x.html">form_new_page(3x)</A></STRONG>
 140        pos_form_cursor         <STRONG><A HREF="form_cursor.3x.html">form_cursor(3x)</A></STRONG>
 141        post_form               <STRONG><A HREF="form_post.3x.html">form_post(3x)</A></STRONG>
 142        scale_form              <STRONG><A HREF="form_win.3x.html">form_win(3x)</A></STRONG>
 143        set_current_field       <STRONG><A HREF="form_page.3x.html">form_page(3x)</A></STRONG>
 144        set_field_back          <STRONG><A HREF="form_field_attributes.3x.html">form_field_attributes(3x)</A></STRONG>
 145        set_field_buffer        <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG>
 146        set_field_fore          <STRONG><A HREF="form_field_attributes.3x.html">form_field_attributes(3x)</A></STRONG>
 147        set_field_init          <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
 148        set_field_just          <STRONG><A HREF="form_field_just.3x.html">form_field_just(3x)</A></STRONG>
 149        set_field_opts          <STRONG><A HREF="form_field_opts.3x.html">form_field_opts(3x)</A></STRONG>
 150        set_field_pad           <STRONG><A HREF="form_field_attributes.3x.html">form_field_attributes(3x)</A></STRONG>
 151        set_field_status        <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG>
 152        set_field_term          <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
 153        set_field_type          <STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG>
 154        set_field_userptr       <STRONG><A HREF="form_field_userptr.3x.html">form_field_userptr(3x)</A></STRONG>
 155        set_fieldtype_arg       <STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG>
 156        set_fieldtype_choice    <STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG>
 157        set_form_fields         <STRONG><A HREF="form_field.3x.html">form_field(3x)</A></STRONG>
 158        set_form_init           <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
 159        set_form_opts           <STRONG><A HREF="form_field_opts.3x.html">form_field_opts(3x)</A></STRONG>
 160        set_form_page           <STRONG><A HREF="form_page.3x.html">form_page(3x)</A></STRONG>
 161        set_form_sub            <STRONG><A HREF="form_win.3x.html">form_win(3x)</A></STRONG>
 162        set_form_term           <STRONG><A HREF="form_hook.3x.html">form_hook(3x)</A></STRONG>
 163        set_form_userptr        <STRONG><A HREF="form_userptr.3x.html">form_userptr(3x)</A></STRONG>
 164        set_form_win            <STRONG><A HREF="form_win.3x.html">form_win(3x)</A></STRONG>
 165        set_max_field           <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG>
 166        set_new_page            <STRONG><A HREF="form_new_page.3x.html">form_new_page(3x)</A></STRONG>
 167        unfocus_current_field   <STRONG><A HREF="form_page.3x.html">form_page(3x)</A></STRONG>
 168        unpost_form             <STRONG><A HREF="form_post.3x.html">form_post(3x)</A></STRONG>
 169
 170
 171 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
 172        Routines that return pointers return <STRONG>NULL</STRONG>  on  error,  and
 173        set  errno  to  the  corresponding  error-code returned by
 174        functions returning an integer.  Routines that  return  an
 175        integer return one of the following error codes:
 176
 177        <STRONG>E_OK</STRONG> The routine succeeded.
 178
 179        <STRONG>E_BAD_ARGUMENT</STRONG>
 180             Routine  detected  an incorrect or out-of-range argu-
 181             ment.
 182
 183        <STRONG>E_BAD_STATE</STRONG>
 184             Routine was called from an initialization or termina-
 185             tion function.
 186
 187        <STRONG>E_CONNECTED</STRONG>
 188             The field is already connected to a form.
 189
 190        <STRONG>E_INVALID_FIELD</STRONG>
 191             Contents of a field are not valid.
 192
 193        <STRONG>E_NOT_CONNECTED</STRONG>
 194             No fields are connected to the form.
 195
 196        <STRONG>E_NOT_POSTED</STRONG>
 197             The form has not been posted.
 198
 199        <STRONG>E_NO_ROOM</STRONG>
 200             Form is too large for its window.
 201
 202        <STRONG>E_POSTED</STRONG>
 203             The form is already posted.
 204
 205        <STRONG>E_REQUEST_DENIED</STRONG>
 206             The form driver could not process the request.
 207
 208        <STRONG>E_SYSTEM_ERROR</STRONG>
 209             System error occurred (see <STRONG>errno</STRONG>).
 210
 211        <STRONG>E_UNKNOWN_COMMAND</STRONG>
 212             The form driver code saw an unknown request code.
 213
 214
 215 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
 216        The header file <STRONG>&lt;form.h&gt;</STRONG> automatically includes the header
 217        files <STRONG>&lt;curses.h&gt;</STRONG> and <STRONG>&lt;eti.h&gt;</STRONG>.
 218
 219        In your library list, libform.a  should  be  before  libn-
 220        curses.a; that is, you want to say "-lform -lncurses", not
 221        the other way around (which would give you  a  link  error
 222        when using static libraries).
 223
 224
 225 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
 226        These  routines  emulate the System V forms library.  They
 227        were not supported on Version 7 or BSD versions.
 228
 229        A few functions are extensions added  for  ncurses,  e.g.,
 230        <STRONG>form_driver_w</STRONG>, <STRONG>unfocus_current_field</STRONG>.
 231
 232
 233 </PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
 234        Juergen  Pfeifer.  Manual pages and adaptation for ncurses
 235        by Eric S. Raymond.
 236
 237
 238 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 239        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG> and related pages whose names begin "form_" for
 240        detailed descriptions of the entry points.
 241
 242        This describes <STRONG>ncurses</STRONG> version 6.0 (patch 20170429).
 243
 244
 245
 246                                                                <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>
 247 </PRE>
 248 <div class="nav">
 249 <ul>
 250 <li><a href="#h2-NAME">NAME</a></li>
 251 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 252 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
 253 <ul>
 254 <li><a href="#h3-Current-Default-Values-for-Field-Attributes">Current Default Values for Field Attributes</a></li>
 255 <li><a href="#h3-Routine-Name-Index">Routine Name Index</a></li>
 256 </ul>
 257 </li>
 258 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 259 <li><a href="#h2-NOTES">NOTES</a></li>
 260 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 261 <li><a href="#h2-AUTHORS">AUTHORS</a></li>
 262 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 263 </ul>
 264 </div>
 265 </BODY>
 266 </HTML>