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PS028,005
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FORMS(3) BSD Library Functions Manual FORMS(3)
NAME
field_opts, field_opts_off, field_opts_on, set_field_opts -- form library
LIBRARY
Curses Form Library (libform, -lform)
SYNOPSIS
#include <form.h>
Form_Options
field_opts(FIELD *field);
int
field_opts_off(FIELD *field, Form_Options options);
int
field_opts_on(FIELD *field, Form_Options options);
int
set_field_opts(FIELD *field, Form_Options options);
DESCRIPTION
The function field_opts() returns the current options settings for the given field. The field_opts_off() will turn the options given in
options off for the given field, options not specified in options will remain unchanged. Conversely, the function field_opts_on() will turn
on the options given in options for the specified field, again, any options not specified will remain unchanged. The options for a field may
be set to a specific set of options by calling the set_field_opts() function. Options may only be changed if the field given is not the cur-
rently active one.
PARAMETERS
The following options are available for a field:
O_VISIBLE The field is visible, hence is displayed when the form is posted.
O_ACTIVE The field is active in the form, meaning that it can be visited during form processing.
O_PUBLIC The contents of the field are echoed to the screen.
O_EDIT The contents of the field can be modified
O_WRAP The contents of the field are wrapped on a word boundary, if this option is off then the field will be wrapped on a character
boundary.
O_BLANK Blank the field on new data being entered if and only if the field cursor is at the left hand side of the field.
O_AUTOSKIP Skip to the next field when the current field reaches its maximum size.
O_NULLOK The field is allowed to contain no data
O_STATIC The field is not dynamic, it has a fixed size.
O_PASSOK An unmodified field is allowed.
O_REFORMAT Retain the formatting of a field when the buffer is retrieved. If this option is not set then the buffer returned will be a sin-
gle string with no line breaks. When this option is set newline characters will be inserted at the point where the string has
been wrapped in a multiline field. This option is an extension to the forms library and must not be used in portable code. See
the field_buffer(3) man page for how this option modifies the behaviour of field_buffer().
The following options are on by default for a field: O_VISIBLE, O_ACTIVE, O_PUBLIC, O_EDIT, O_WRAP, O_BLANK, O_AUTOSKIP, O_NULLOK, O_PASSOK,
and O_STATIC.
RETURN VALUES
Functions returning pointers will return NULL if an error is detected. The functions that return an int will return one of the following
error values:
E_OK The function was successful.
E_CURRENT The field specified is the currently active one in the form.
SEE ALSO
curses(3), forms(3)
NOTES
The header <form.h> automatically includes both <curses.h> and <eti.h>. The option O_REFORMAT is a NetBSD
extension and must not be used in portable code.
BSD
November 24, 2004 BSD