MirOS Manual: field_init(3), field_term(3), form_hook(3), form_init(3), form_term(3), set_field_init(3), set_field_term(3), set_form_init(3), set_form_term(3)


form_hook(3)        UNIX Programmer's Manual         form_hook(3)

NAME

     form_hook - set hooks for automatic invocation by applica-
     tions

SYNOPSIS

     #include <form.h>
     int set_field_init(FORM *form, void (*func)(FORM *));
     void (*)(FORM *) field_init(const FORM *form);
     int set_field_term(FORM *form, void (*func)(FORM *));
     void (*)(FORM *) field_term(const FORM *form);
     int set_form_init(FORM *form, void (*func)(FORM *));
     void (*)(FORM *) form_init(const FORM *form);
     int set_form_term(FORM *form, void (*func)(FORM *));
     void (*)(FORM *) form_term(const FORM *form);

DESCRIPTION

     These functions make it possible to set hook functions to be
     called at various points in the automatic processing of
     input event codes by form_driver.

     The function set_field_init sets a hook to be called at
     form-post time and each time the selected field changes
     (after the change).  field_init returns the current field
     init hook, if any (NULL if there is no such hook).

     The function set_field_term sets a hook to be called at
     form-unpost time and each time the selected field changes
     (before the change).  field_term returns the current field
     term hook, if any (NULL if there is no such hook).

     The function set_form_init sets a hook to be called at
     form-post time and just after a page change once it is
     posted.  form_init returns the current form init hook, if
     any (NULL if there is no such hook).

     The function set_form_term sets a hook to be called at
     form-unpost time and just before a page change once it is
     posted.  form_init returns the current form term hook, if
     any (NULL if there is no such hook).

RETURN VALUE

     Routines that return pointers return NULL on error.  Other
     routines return one of the following:

     E_OK The routine succeeded.

     E_SYSTEM_ERROR
          System error occurred (see errno).

SEE ALSO

     curses(3), form(3).

MirOS BSD #10-current  Printed 03.04.2017                       1

form_hook(3)        UNIX Programmer's Manual         form_hook(3)

NOTES

     The header file <form.h> automatically includes the header
     file <curses.h>.

PORTABILITY

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

AUTHORS

     Juergen Pfeifer.  Manual pages and adaptation for new curses
     by Eric S. Raymond.

MirOS BSD #10-current  Printed 03.04.2017                       2

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