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+'\" t
+.\"***************************************************************************
+.\" Copyright 2018-2021,2023 Thomas E. Dickey *
+.\" Copyright 1998-2016,2017 Free Software Foundation, Inc. *
+.\" *
+.\" Permission is hereby granted, free of charge, to any person obtaining a *
+.\" copy of this software and associated documentation files (the *
+.\" "Software"), to deal in the Software without restriction, including *
+.\" without limitation the rights to use, copy, modify, merge, publish, *
+.\" distribute, distribute with modifications, sublicense, and/or sell *
+.\" copies of the Software, and to permit persons to whom the Software is *
+.\" furnished to do so, subject to the following conditions: *
+.\" *
+.\" The above copyright notice and this permission notice shall be included *
+.\" in all copies or substantial portions of the Software. *
+.\" *
+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+.\" *
+.\" Except as contained in this notice, the name(s) of the above copyright *
+.\" holders shall not be used in advertising or otherwise to promote the *
+.\" sale, use or other dealings in this Software without prior written *
+.\" authorization. *
+.\"***************************************************************************
+.\"
+.\" $Id: form.3x,v 1.52 2023/12/23 16:08:25 tom Exp $
+.TH form 3X 2023-12-23 "ncurses 6.4" "Library calls"
+.ie \n(.g \{\
+.ds `` \(lq
+.ds '' \(rq
+.\}
+.el \{\
+.ie t .ds `` ``
+.el .ds `` ""
+.ie t .ds '' ''
+.el .ds '' ""
+.\}
+.
+.de bP
+.ie n .IP \(bu 4
+.el .IP \(bu 2
+..
+.SH NAME
+\fBform\fP \-
+curses extension for programming forms
+.SH SYNOPSIS
+.nf
+\fB#include <form.h>
+.fi
+.SH DESCRIPTION
+The \fBform\fP library provides terminal-independent facilities for composing
+form screens on character-cell terminals.
+The library includes: field
+routines, which create and modify form fields; and form routines, which group
+fields into forms, display forms on the screen, and handle interaction with the
+user.
+.PP
+The \fBform\fP library uses the \fBcurses\fP libraries.
+To use the \fBform\fP library, link with the options
+\fB\-lform \-lcurses\fP.
+.PP
+Your program should set up the locale, e.g.,
+.sp
+ \fBsetlocale(LC_ALL, "");\fP
+.sp
+so that input/output processing will work.
+.PP
+A curses initialization routine such as \fBinitscr\fP must be called
+before using any of these functions.
+.
+.SS "Current Default Values for Field Attributes"
+.
+The \fBform\fP library maintains a default value for field attributes.
+You
+can get or set this default by calling the appropriate \fBset_\fP
+or retrieval
+routine with a \fBNULL\fP field pointer.
+Changing this default with a
+\fBset_\fP function affects future field creations, but does not change the
+rendering of fields already created.
+.
+.SS "Routine Name Index"
+.
+The following table lists each \fBform\fP routine and the name of
+the manual page on which it is described.
+Routines flagged with \*(``*\*(''
+are \fI\%ncurses\fP-specific, not present in SVr4.
+.PP
+.TS
+l l
+l l .
+\fBcurses\fP Routine Name Manual Page Name
+=
+current_field \fBform_page\fP(3X)
+data_ahead \fBform_data\fP(3X)
+data_behind \fBform_data\fP(3X)
+dup_field \fBform_field_new\fP(3X)
+dynamic_field_info \fBform_field_info\fP(3X)
+field_arg \fBform_field_validation\fP(3X)
+field_back \fBform_field_attributes\fP(3X)
+field_buffer \fBform_field_buffer\fP(3X)
+field_count \fBform_field\fP(3X)
+field_fore \fBform_field_attributes\fP(3X)
+field_index \fBform_page\fP(3X)
+field_info \fBform_field_info\fP(3X)
+field_init \fBform_hook\fP(3X)
+field_just \fBform_field_just\fP(3X)
+field_opts \fBform_field_opts\fP(3X)
+field_opts_off \fBform_field_opts\fP(3X)
+field_opts_on \fBform_field_opts\fP(3X)
+field_pad \fBform_field_attributes\fP(3X)
+field_status \fBform_field_buffer\fP(3X)
+field_term \fBform_hook\fP(3X)
+field_type \fBform_field_validation\fP(3X)
+field_userptr \fBform_field_userptr\fP(3X)
+form_driver \fBform_driver\fP(3X)
+form_driver_w \fBform_driver\fP(3X)*
+form_fields \fBform_field\fP(3X)
+form_init \fBform_hook\fP(3X)
+form_opts \fBform_opts\fP(3X)
+form_opts_off \fBform_opts\fP(3X)
+form_opts_on \fBform_opts\fP(3X)
+form_page \fBform_page\fP(3X)
+form_request_by_name \fBform_requestname\fP(3X)*
+form_request_name \fBform_requestname\fP(3X)*
+form_sub \fBform_win\fP(3X)
+form_term \fBform_hook\fP(3X)
+form_userptr \fBform_userptr\fP(3X)
+form_win \fBform_win\fP(3X)
+free_field \fBform_field_new\fP(3X)
+free_fieldtype \fBform_fieldtype\fP(3X)
+free_form \fBform_new\fP(3X)
+link_field \fBform_field_new\fP(3X)
+link_fieldtype \fBform_fieldtype\fP(3X)
+move_field \fBform_field\fP(3X)
+new_field \fBform_field_new\fP(3X)
+new_fieldtype \fBform_fieldtype\fP(3X)
+new_form \fBform_new\fP(3X)
+new_page \fBform_new_page\fP(3X)
+pos_form_cursor \fBform_cursor\fP(3X)
+post_form \fBform_post\fP(3X)
+scale_form \fBform_win\fP(3X)
+set_current_field \fBform_page\fP(3X)
+set_field_back \fBform_field_attributes\fP(3X)
+set_field_buffer \fBform_field_buffer\fP(3X)
+set_field_fore \fBform_field_attributes\fP(3X)
+set_field_init \fBform_hook\fP(3X)
+set_field_just \fBform_field_just\fP(3X)
+set_field_opts \fBform_field_opts\fP(3X)
+set_field_pad \fBform_field_attributes\fP(3X)
+set_field_status \fBform_field_buffer\fP(3X)
+set_field_term \fBform_hook\fP(3X)
+set_field_type \fBform_field_validation\fP(3X)
+set_field_userptr \fBform_field_userptr\fP(3X)
+set_fieldtype_arg \fBform_fieldtype\fP(3X)
+set_fieldtype_choice \fBform_fieldtype\fP(3X)
+set_form_fields \fBform_field\fP(3X)
+set_form_init \fBform_hook\fP(3X)
+set_form_opts \fBform_field_opts\fP(3X)
+set_form_page \fBform_page\fP(3X)
+set_form_sub \fBform_win\fP(3X)
+set_form_term \fBform_hook\fP(3X)
+set_form_userptr \fBform_userptr\fP(3X)
+set_form_win \fBform_win\fP(3X)
+set_max_field \fBform_field_buffer\fP(3X)
+set_new_page \fBform_new_page\fP(3X)
+unfocus_current_field \fBform_page\fP(3X)*
+unpost_form \fBform_post\fP(3X)
+.TE
+.SH RETURN VALUE
+Routines that return pointers return \fBNULL\fP on error,
+and set \fBerrno\fP to the corresponding error-code returned by functions
+returning an integer.
+Routines that return
+an integer return one of the following error codes:
+.TP 5
+.B E_OK
+The routine succeeded.
+.TP 5
+.B E_BAD_ARGUMENT
+Routine detected an incorrect or out-of-range argument.
+.TP 5
+.B E_BAD_STATE
+Routine was called from an initialization or termination function.
+.TP 5
+.B E_CONNECTED
+The field is already connected to a form.
+.TP 5
+.B E_INVALID_FIELD
+Contents of a field are not valid.
+.TP 5
+.B E_NOT_CONNECTED
+No fields are connected to the form.
+.TP 5
+.B E_NOT_POSTED
+The form has not been posted.
+.TP 5
+.B E_NO_ROOM
+Form is too large for its window.
+.TP 5
+.B E_POSTED
+The form is already posted.
+.TP 5
+.B E_REQUEST_DENIED
+The form driver could not process the request.
+.TP 5
+.B E_SYSTEM_ERROR
+System error occurred (see \fBerrno\fP(3)).
+.TP 5
+.B E_UNKNOWN_COMMAND
+The form driver code saw an unknown request code.
+.SH NOTES
+The header file \fI\%form.h\fP itself includes \fI\%curses.h\fP.
+.SH PORTABILITY
+These routines emulate the System V forms library.
+They were not supported on
+Version 7 or BSD versions.
+.PP
+A form facility was documented in SVr4.2's
+\fICharacter User Interface Programming\fP document.
+.PP
+It is not part of X/Open Curses.
+.PP
+Aside from \fI\%ncurses\fP, there are few implementations:
+.bP
+systems based on SVr4 source code, e.g., Solaris.
+.bP
+NetBSD curses.
+.PP
+A few functions in this implementation are extensions added for
+\fI\%ncurses\fP,
+but not provided by other implementations, e.g.,
+\fBform_driver_w\fP,
+\fBunfocus_current_field\fP.
+.SH AUTHORS
+Juergen Pfeifer.
+Manual pages and adaptation for \fI\%ncurses\fP by Eric
+S. Raymond.
+.SH SEE ALSO
+\fBcurses\fP(3X) and related pages whose names begin \*(``form_\*('' for
+detailed descriptions of the entry points.
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 23:27:05 +0000