field_index3

Usage

Overview

The function set_current_field sets the current field of the given form; current_field returns the current field of the given form.

The function unfocus_current_field removes the focus from the current field of the form. In such state, inquiries via current_field shall return a NULL pointer.

The function set_form_page sets the form's page number (goes to page n of the form).

The function form_page returns the form's current page number.

The function field_index returns the index of the field in the field array of the form it is connected to. It returns ERR if the argument is the null pointer or the field is not connected.

Return value

Except for form_page, each routine returns one of the following:

E_OK

The routine succeeded.

E_BAD_ARGUMENT

Routine detected an incorrect or out-of-range argument.

E_BAD_STATE

Routine was called from an initialization or termination function.

E_INVALID_FIELD

Contents of a field are not valid.

E_REQUEST_DENIED

The form driver could not process the request.

E_SYSTEM_ERROR

System error occurred (see errno(3)).

Portability

These routines emulate the System V forms library. They were not supported on Version 7 or BSD versions.

The unfocus_current_field function is an ncurses extension.