76da89185d5b4339a408e873dbad56cea872195d
[ncurses.git] / doc / html / man / form.3x.html
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37 <TITLE>form 3x</TITLE>
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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        unpost_form            <STRONG><A HREF="form_post.3x.html">form_post(3x)</A></STRONG>
168
169
170 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
171        Routines that return pointers return <STRONG>NULL</STRONG>  on  error,  and
172        set  errno  to  the  corresponding  error-code returned by
173        functions returning an integer.  Routines that  return  an
174        integer return one of the following error codes:
175
176        <STRONG>E_OK</STRONG> The routine succeeded.
177
178        <STRONG>E_BAD_ARGUMENT</STRONG>
179             Routine  detected  an incorrect or out-of-range argu-
180             ment.
181
182        <STRONG>E_BAD_STATE</STRONG>
183             Routine was called from an initialization or termina-
184             tion function.
185
186        <STRONG>E_CONNECTED</STRONG>
187             The field is already connected to a form.
188
189        <STRONG>E_INVALID_FIELD</STRONG>
190             Contents of a field are not valid.
191
192        <STRONG>E_NOT_CONNECTED</STRONG>
193             No fields are connected to the form.
194
195        <STRONG>E_NOT_POSTED</STRONG>
196             The form has not been posted.
197
198        <STRONG>E_NO_ROOM</STRONG>
199             Form is too large for its window.
200
201        <STRONG>E_POSTED</STRONG>
202             The form is already posted.
203
204        <STRONG>E_REQUEST_DENIED</STRONG>
205             The form driver could not process the request.
206
207        <STRONG>E_SYSTEM_ERROR</STRONG>
208             System error occurred (see <STRONG>errno</STRONG>).
209
210        <STRONG>E_UNKNOWN_COMMAND</STRONG>
211             The form driver code saw an unknown request code.
212
213
214 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
215        The header file <STRONG>&lt;form.h&gt;</STRONG> automatically includes the header
216        files <STRONG>&lt;curses.h&gt;</STRONG> and <STRONG>&lt;eti.h&gt;</STRONG>.
217
218        In your library list, libform.a  should  be  before  libn-
219        curses.a; that is, you want to say `-lform -lncurses', not
220        the other way around (which would give you  a  link  error
221        using most linkers).
222
223
224 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
225        These  routines  emulate the System V forms library.  They
226        were not supported on Version 7 or BSD versions.
227
228
229 </PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
230        Juergen Pfeifer.  Manual pages and adaptation for  ncurses
231        by Eric S. Raymond.
232
233
234 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
235        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG> and related pages whose names begin "form_" for
236        detailed descriptions of the entry points.
237
238        This describes <STRONG>ncurses</STRONG> version 6.0 (patch 20160723).
239
240
241
242                                                                <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>
243 </PRE>
244 <div class="nav">
245 <ul>
246 <li><a href="#h2-NAME">NAME</a></li>
247 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
248 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
249 <ul>
250 <li><a href="#h3-Current-Default-Values-for-Field-Attributes">Current Default Values for Field Attributes</a></li>
251 <li><a href="#h3-Routine-Name-Index">Routine Name Index</a></li>
252 </ul>
253 </li>
254 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
255 <li><a href="#h2-NOTES">NOTES</a></li>
256 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
257 <li><a href="#h2-AUTHORS">AUTHORS</a></li>
258 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
259 </ul>
260 </div>
261 </BODY>
262 </HTML>