move_field3x
Make and break connections between fields and forms
Part of form_field(3x).
Overview
The function set_form_fields changes the field pointer array of the given form. The array must be terminated by a NULL.
The function form_fields returns the field array of the given form.
The function field_count returns the count of fields in form.
The function move_field moves the given field (which must be disconnected) to a specified location on the screen.
Return value
The function form_fields returns a pointer (which may be NULL). It does not set errno.
The function field_count returns ERR if the form parameter is NULL.
The functions set_form_fields and move_field return one of the following codes on error:
E_OK-
The routine succeeded.
E_BAD_ARGUMENT-
Routine detected an incorrect or out-of-range argument.
E_CONNECTED-
The field is already connected to a form.
E_POSTED-
The form is already posted.
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 SVr4 forms library documentation specifies the field_count error value as -1 (which is the value of ERR).