FORMS(3)

FORMS(3) | 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 currently 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 single 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.

November 24, 2004 | NetBSD 8.3