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30 .\" $Id: form.3x,v 1.29 2017/02/18 16:46:53 tom Exp $
37 \fBform\fR \- curses extension for programming forms
39 \fB#include <form.h>\fR
42 The \fBform\fR library provides terminal-independent facilities for composing
43 form screens on character-cell terminals. The library includes: field
44 routines, which create and modify form fields; and form routines, which group
45 fields into forms, display forms on the screen, and handle interaction with the
48 The \fBform\fR library uses the \fBcurses\fR libraries.
49 To use the \fBform\fR library, link with the options
50 \fB\-lform \-lcurses\fR.
52 Your program should set up the locale, e.g.,
54 \fBsetlocale(LC_ALL, "");\fP
56 so that input/output processing will work.
58 A curses initialization routine such as \fBinitscr\fR must be called
59 before using any of these functions.
61 .SS Current Default Values for Field Attributes
63 The \fBform\fR library maintains a default value for field attributes. You
64 can get or set this default by calling the appropriate \fBset_\fR
66 routine with a \fBNULL\fR field pointer. Changing this default with a
67 \fBset_\fR function affects future field creations, but does not change the
68 rendering of fields already created.
70 .SS Routine Name Index
72 The following table lists each \fBform\fR routine and the name of
73 the manual page on which it is described.
78 \fBcurses\fR Routine Name Manual Page Name
80 current_field \fBform_page\fR(3X)
81 data_ahead \fBform_data\fR(3X)
82 data_behind \fBform_data\fR(3X)
83 dup_field \fBform_field_new\fR(3X)
84 dynamic_field_info \fBform_field_info\fR(3X)
85 field_arg \fBform_field_validation\fR(3X)
86 field_back \fBform_field_attributes\fR(3X)
87 field_buffer \fBform_field_buffer\fR(3X)
88 field_count \fBform_field\fR(3X)
89 field_fore \fBform_field_attributes\fR(3X)
90 field_index \fBform_page\fR(3X)
91 field_info \fBform_field_info\fR(3X)
92 field_init \fBform_hook\fR(3X)
93 field_just \fBform_field_just\fR(3X)
94 field_opts \fBform_field_opts\fR(3X)
95 field_opts_off \fBform_field_opts\fR(3X)
96 field_opts_on \fBform_field_opts\fR(3X)
97 field_pad \fBform_field_attributes\fR(3X)
98 field_status \fBform_field_buffer\fR(3X)
99 field_term \fBform_hook\fR(3X)
100 field_type \fBform_field_validation\fR(3X)
101 field_userptr \fBform_field_userptr\fR(3X)
102 form_driver \fBform_driver\fR(3X)
103 form_driver_w \fBform_driver\fR(3X)*
104 form_fields \fBform_field\fR(3X)
105 form_init \fBform_hook\fR(3X)
106 form_opts \fBform_opts\fR(3X)
107 form_opts_off \fBform_opts\fR(3X)
108 form_opts_on \fBform_opts\fR(3X)
109 form_page \fBform_page\fR(3X)
110 form_request_by_name \fBform_requestname\fR(3X)
111 form_request_name \fBform_requestname\fR(3X)
112 form_sub \fBform_win\fR(3X)
113 form_term \fBform_hook\fR(3X)
114 form_userptr \fBform_userptr\fR(3X)
115 form_win \fBform_win\fR(3X)
116 free_field \fBform_field_new\fR(3X)
117 free_fieldtype \fBform_fieldtype\fR(3X)
118 free_form \fBform_new\fR(3X)
119 link_field \fBform_field_new\fR(3X)
120 link_fieldtype \fBform_fieldtype\fR(3X)
121 move_field \fBform_field\fR(3X)
122 new_field \fBform_field_new\fR(3X)
123 new_fieldtype \fBform_fieldtype\fR(3X)
124 new_form \fBform_new\fR(3X)
125 new_page \fBform_new_page\fR(3X)
126 pos_form_cursor \fBform_cursor\fR(3X)
127 post_form \fBform_post\fR(3X)
128 scale_form \fBform_win\fR(3X)
129 set_current_field \fBform_page\fR(3X)
130 set_field_back \fBform_field_attributes\fR(3X)
131 set_field_buffer \fBform_field_buffer\fR(3X)
132 set_field_fore \fBform_field_attributes\fR(3X)
133 set_field_init \fBform_hook\fR(3X)
134 set_field_just \fBform_field_just\fR(3X)
135 set_field_opts \fBform_field_opts\fR(3X)
136 set_field_pad \fBform_field_attributes\fR(3X)
137 set_field_status \fBform_field_buffer\fR(3X)
138 set_field_term \fBform_hook\fR(3X)
139 set_field_type \fBform_field_validation\fR(3X)
140 set_field_userptr \fBform_field_userptr\fR(3X)
141 set_fieldtype_arg \fBform_fieldtype\fR(3X)
142 set_fieldtype_choice \fBform_fieldtype\fR(3X)
143 set_form_fields \fBform_field\fR(3X)
144 set_form_init \fBform_hook\fR(3X)
145 set_form_opts \fBform_field_opts\fR(3X)
146 set_form_page \fBform_page\fR(3X)
147 set_form_sub \fBform_win\fR(3X)
148 set_form_term \fBform_hook\fR(3X)
149 set_form_userptr \fBform_userptr\fR(3X)
150 set_form_win \fBform_win\fR(3X)
151 set_max_field \fBform_field_buffer\fR(3X)
152 set_new_page \fBform_new_page\fR(3X)
153 unfocus_current_field \fBform_page\fR(3X)
154 unpost_form \fBform_post\fR(3X)
157 Routines that return pointers return \fBNULL\fR on error,
158 and set errno to the corresponding error-code returned by functions
159 returning an integer.
161 an integer return one of the following error codes:
164 The routine succeeded.
167 Routine detected an incorrect or out-of-range argument.
170 Routine was called from an initialization or termination function.
173 The field is already connected to a form.
176 Contents of a field are not valid.
179 No fields are connected to the form.
182 The form has not been posted.
185 Form is too large for its window.
188 The form is already posted.
191 The form driver could not process the request.
194 System error occurred (see \fBerrno\fR).
197 The form driver code saw an unknown request code.
199 The header file \fB<form.h>\fR automatically includes the header files
200 \fB<curses.h>\fR and \fB<eti.h>\fR.
202 In your library list, libform.a should be before libncurses.a; that is,
203 you want to say \*(``\-lform \-lncurses\*('', not the other way around
204 (which would give you a link error when using static libraries).
206 These routines emulate the System V forms library. They were not supported on
207 Version 7 or BSD versions.
209 A few functions are extensions added for ncurses, e.g.,
211 \fBunfocus_current_field\fP.
213 Juergen Pfeifer. Manual pages and adaptation for ncurses by Eric
216 \fBcurses\fR(3X) and related pages whose names begin "form_" for detailed
217 descriptions of the entry points.
219 This describes \fBncurses\fR
220 version 6.0 (patch 20171007).