| 1 | '\" t
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| 2 | .\"***************************************************************************
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| 3 | .\" Copyright (c) 1998 Free Software Foundation, Inc. *
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| 4 | .\" *
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| 5 | .\" Permission is hereby granted, free of charge, to any person obtaining a *
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| 6 | .\" copy of this software and associated documentation files (the *
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| 7 | .\" "Software"), to deal in the Software without restriction, including *
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| 8 | .\" without limitation the rights to use, copy, modify, merge, publish, *
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| 9 | .\" distribute, distribute with modifications, sublicense, and/or sell *
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| 10 | .\" copies of the Software, and to permit persons to whom the Software is *
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| 11 | .\" furnished to do so, subject to the following conditions: *
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| 12 | .\" *
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| 13 | .\" The above copyright notice and this permission notice shall be included *
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| 14 | .\" in all copies or substantial portions of the Software. *
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| 15 | .\" *
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| 16 | .\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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| 17 | .\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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| 18 | .\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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| 19 | .\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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| 20 | .\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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| 21 | .\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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| 22 | .\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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| 23 | .\" *
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| 24 | .\" Except as contained in this notice, the name(s) of the above copyright *
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| 25 | .\" holders shall not be used in advertising or otherwise to promote the *
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| 26 | .\" sale, use or other dealings in this Software without prior written *
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| 27 | .\" authorization. *
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| 28 | .\"***************************************************************************
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| 29 | .\"
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| 30 | .\" $Id: menu_hook.3x,v 1.6 1998/11/29 01:09:47 Rick.Ohnemus Exp $
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| 31 | .TH menu_hook 3X ""
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| 32 | .SH NAME
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| 33 | \fBmenu_hook\fR - set hooks for automatic invocation by applications
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| 34 | .SH SYNOPSIS
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| 35 | \fB#include <menu.h>\fR
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| 36 | .br
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| 37 | int set_item_init(MENU *menu, void (*func)(MENU *));
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| 38 | .br
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| 39 | void (*)(MENU *) item_init(const MENU *menu);
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| 40 | .br
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| 41 | int set_item_term(MENU *menu, void (*func)(MENU *));
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| 42 | .br
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| 43 | void (*)(MENU *) item_term(const MENU *menu);
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| 44 | .br
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| 45 | int set_menu_init(MENU *menu, void (*func)(MENU *));
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| 46 | .br
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| 47 | void (*)(MENU *) menu_init(const MENU *menu);
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| 48 | .br
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| 49 | int set_menu_term(MENU *menu, void (*func)(MENU *));
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| 50 | .br
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| 51 | void (*)(MENU *) menu_term(const MENU *menu);
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| 52 | .br
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| 53 | .SH DESCRIPTION
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| 54 | These functions make it possible to set hook functions to be called at various
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| 55 | points in the automatic processing of input event codes by \fBmenu_driver\fR.
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| 56 |
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| 57 | The function \fBset_item_init\fR sets a hook to be called at menu-post time and
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| 58 | each time the selected item changes (after the change). \fBitem_init\fR
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| 59 | returns the current item init hook, if any (\fBNULL\fR if there is no such
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| 60 | hook).
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| 61 |
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| 62 | The function \fBset_item_term\fR sets a hook to be called at menu-unpost time
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| 63 | and each time the selected item changes (before the change). \fBitem_term\fR
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| 64 | returns the current item term hook, if any (\fBNULL\fR if there is no such
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| 65 | hook).
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| 66 |
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| 67 | The function \fBset_menu_init\fR sets a hook to be called at menu-post time and
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| 68 | just after the top row on the menu changes once it is posted. \fBmenu_init\fR
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| 69 | returns the current menu init hook, if any (\fBNULL\fR if there is no such
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| 70 | hook).
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| 71 |
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| 72 | The function \fBset_menu_term\fR sets a hook to be called at menu-unpost time
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| 73 | and just before the top row on the menu changes once it is posted.
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| 74 | \fBmenu_term\fR returns the current menu term hook, if any (\fBNULL\fR if there
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| 75 | is no such hook).
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| 76 | .SH RETURN VALUE
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| 77 | Routines that return pointers return \fBNULL\fR on error. Other routines
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| 78 | return one of the following:
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| 79 | .TP 5
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| 80 | \fBE_OK\fR
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| 81 | The routine succeeded.
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| 82 | .TP 5
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| 83 | \fBE_SYSTEM_ERROR\fR
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| 84 | System error occurred (see \fBerrno\fR).
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| 85 | .SH SEE ALSO
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| 86 | \fBcurses\fR(3X), \fBmenu\fR(3X).
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| 87 | .SH NOTES
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| 88 | The header file \fB<menu.h>\fR automatically includes the header file
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| 89 | \fB<curses.h>\fR.
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| 90 | .SH PORTABILITY
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| 91 | These routines emulate the System V menu library. They were not supported on
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| 92 | Version 7 or BSD versions.
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| 93 | .SH AUTHORS
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| 94 | Juergen Pfeifer. Manual pages and adaptation for new curses by Eric
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| 95 | S. Raymond.
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| 96 | .\"#
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| 97 | .\"# The following sets edit modes for GNU EMACS
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| 98 | .\"# Local Variables:
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| 99 | .\"# mode:nroff
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| 100 | .\"# fill-column:79
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| 101 | .\"# End:
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