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'\" t
.\"***************************************************************************
.\" Copyright 2018-2019,2020 Thomas E. Dickey                                *
.\" Copyright 1998-2010,2012 Free Software Foundation, Inc.                  *
.\"                                                                          *
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.\" furnished to do so, subject to the following conditions:                 *
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.\"***************************************************************************
.\"
.\" $Id: form_field.3x,v 1.14 2020/02/02 23:34:34 tom Exp $
.TH form_field 3X ""
.SH NAME
\fBform_field\fR \- make and break connections between fields and forms
.SH SYNOPSIS
\fB#include <form.h>\fR
.br
int set_form_fields(FORM *form, FIELD **fields);
.br
FIELD **form_fields(const FORM *form);
.br
int field_count(const FORM *form);
.br
int move_field(FIELD *field, int frow, int fcol);
.br
.SH DESCRIPTION
The function \fBset_form_fields\fR changes the field pointer array of
the given \fIform\fR.  The array must be terminated by a \fBNULL\fR.
.PP
The function \fBform_fields\fR returns the field array of the given form.
.PP
The function \fBfield_count\fR returns the count of fields in \fIform\fR.
.PP
The function \fBmove_field\fR moves the given field (which must be disconnected)
to a specified location on the screen.
.SH RETURN VALUE
The function \fBform_fields\fR returns a pointer (which may be \fBNULL\fR).
It does not set errno.
.PP
The function \fBfield_count\fR returns \fBERR\fR if the \fIform\fP parameter
is \fBNULL\fP.
.PP
The functions \fBset_form_fields\fR and \fBmove_field\fR return one of
the following codes on error:
.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_CONNECTED
The field is already connected to a form.
.TP 5
.B E_POSTED
The form is already posted.
.TP 5
.B E_SYSTEM_ERROR
System error occurred (see \fBerrno\fR(3)).
.SH SEE ALSO
\fBcurses\fR(3X), \fBform\fR(3X).
.SH NOTES
The header file \fB<form.h>\fR automatically includes the header file
\fB<curses.h>\fR.
.SH PORTABILITY
These routines emulate the System V forms library.
They were not supported on
Version 7 or BSD versions.
.PP
The SVr4 forms library documentation specifies the \fBfield_count\fR error value
as \-1 (which is the value of \fBERR\fR).
.SH AUTHORS
Juergen Pfeifer.
Manual pages and adaptation for new curses by Eric S. Raymond.