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72 lines
2.3 KiB
Plaintext
72 lines
2.3 KiB
Plaintext
'\" t
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.TH form_hook 3X ""
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.SH NAME
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\fBform_hook\fR - set hooks for automatic invocation by applications
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.SH SYNOPSIS
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\fB#include <form.h>\fR
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.br
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int set_field_init(FORM *form, void (*func)(FORM *));
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.br
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void (*)(FORM *) field_init(const FORM *form);
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.br
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int set_field_term(FORM *form, void (*func)(FORM *));
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.br
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void (*)(FORM *) field_term(const FORM *form);
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.br
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int set_form_init(FORM *form, void (*func)(FORM *));
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.br
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void (*)(FORM *) form_init(const FORM *form);
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.br
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int set_form_term(FORM *form, void (*func)(FORM *));
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.br
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void (*)(FORM *) form_term(const FORM *form);
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.br
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.SH DESCRIPTION
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These functions make it possible to set hook functions to be called at various
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points in the automatic processing of input event codes by \fBform_driver\fR.
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The function \fBset_field_init\fR sets a hook to be called at form-post time
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and each time the selected field changes (after the change). \fBfield_init\fR
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returns the current field init hook, if any (\fBNULL\fR if there is no such
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hook).
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The function \fBset_field_term\fR sets a hook to be called at form-unpost time
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and each time the selected field changes (before the change). \fBfield_term\fR
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returns the current field term hook, if any (\fBNULL\fR if there is no such
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hook).
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The function \fBset_form_init\fR sets a hook to be called at form-post time and
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just after a page change once it is posted. \fBform_init\fR returns the
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current form init hook, if any (\fBNULL\fR if there is no such hook).
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The function \fBset_form_term\fR sets a hook to be called at form-unpost time
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and just before a page change change once it is posted. \fBform_init\fR
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returns the current form term hook, if any (\fBNULL\fR if there is no such
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hook).
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.SH RETURN VALUE
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Routines that return pointers return \fBNULL\fR on error. Other routines
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return one of the following:
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.TP 5
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\fBE_OK\fR
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The routine succeeded.
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.TP 5
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\fBE_SYSTEM_ERROR\fR
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System error occurred (see \fBerrno\fR).
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.SH SEE ALSO
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\fBcurses\fR(3X), \fBform\fR(3X).
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.SH NOTES
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The header file \fB<form.h>\fR automatically includes the header file
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\fB<curses.h>\fR.
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.SH PORTABILITY
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These routines emulate the System V forms library. They were not supported on
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Version 7 or BSD versions.
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.SH AUTHORS
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Juergen Pfeifer. Manual pages and adaptation for new curses by Eric
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S. Raymond.
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.\"#
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.\"# The following sets edit modes for GNU EMACS
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.\"# Local Variables:
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.\"# mode:nroff
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.\"# fill-column:79
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.\"# End:
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