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ncursesw-morphos/man/mitem_current.3x
Thomas E. Dickey e5d1530ca2 ncurses 6.2 - patch 20201017
+ improve manpage typography.
+ improve discussion in curs_addch.3x of the use of unctrl to display
  nonprintable characters.
+ add a note in terminfo.5 explaining that no-parameter strings such
  as sgr0 or cnorm should not be used with tparm.
2020-10-18 01:25:54 +00:00

102 lines
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'\" t
.\"***************************************************************************
.\" Copyright 2018-2019,2020 Thomas E. Dickey *
.\" Copyright 1998-2006,2010 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" "Software"), to deal in the Software without restriction, including *
.\" without limitation the rights to use, copy, modify, merge, publish, *
.\" distribute, distribute with modifications, sublicense, and/or sell *
.\" copies of the Software, and to permit persons to whom the Software is *
.\" furnished to do so, subject to the following conditions: *
.\" *
.\" The above copyright notice and this permission notice shall be included *
.\" in all copies or substantial portions of the Software. *
.\" *
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
.\" *
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.\" holders shall not be used in advertising or otherwise to promote the *
.\" sale, use or other dealings in this Software without prior written *
.\" authorization. *
.\"***************************************************************************
.\"
.\" $Id: mitem_current.3x,v 1.20 2020/10/18 00:39:06 tom Exp $
.TH mitem_current 3X ""
.SH NAME
\fBmitem_current\fR \- set and get current_menu_item
.SH SYNOPSIS
\fB#include <menu.h>\fR
.sp
\fBint set_current_item(MENU *\fP\fImenu\fP\fB, ITEM *\fP\fIitem\fP\fB);\fP
.br
\fBITEM *current_item(const MENU *\fP\fImenu\fP\fB);\fP
.sp
\fBint set_top_row(MENU *\fP\fImenu\fP\fB, int \fP\fIrow\fP\fB);\fP
.br
\fBint top_row(const MENU *\fP\fImenu\fP\fB);\fP
.sp
\fBint item_index(const ITEM *\fP\fIitem\fP\fB);\fP
.br
.SH DESCRIPTION
The function \fBset_current_item\fR sets the current item (the item on which
the menu cursor is positioned).
\fBcurrent_item\fR returns a pointer to the
current item in the given menu.
.PP
The function \fBset_top_row\fR sets the top row of the menu to show the given
row (the top row is initially 0, and is reset to this value whenever the
\fBO_ROWMAJOR\fR option is toggled).
The item leftmost on the given row
becomes current.
The function \fBtop_row\fR returns the number of the top menu
row being displayed.
.PP
The function \fBitem_index\fR returns the (zero-origin) index of \fIitem\fR in
the menu's item pointer list.
.SH RETURN VALUE
\fBcurrent_item\fR returns a pointer (which may be \fBNULL\fR).
It does not set \fBerrno\fP.
.PP
\fBtop_row\fR and \fBitem_index\fR return \fBERR\fR (the general \fBcurses\fR
error value) if their \fImenu\fP parameter is \fBNULL\fP.
.PP
\fBset_current_item\fR and \fBset_top_row\fR return one of the following:
.TP 5
.B E_OK
The routine succeeded.
.TP 5
.B E_BAD_ARGUMENT
Routine detected an incorrect or out-of-range argument.
.TP 5
.B E_BAD_STATE
Routine was called from an initialization or termination function.
.TP 5
.B E_NOT_CONNECTED
No items are connected to the menu.
.TP 5
.B E_SYSTEM_ERROR
System error occurred (see \fBerrno\fR(3)).
.SH SEE ALSO
\fBcurses\fR(3X), \fBmenu\fR(3X).
.SH NOTES
The header file \fB<menu.h>\fR automatically includes the header file
\fB<curses.h>\fR.
.SH PORTABILITY
These routines emulate the System V menu library.
They were not supported on
Version 7 or BSD versions.
.PP
The SVr4 menu library documentation specifies the \fBtop_row\fR and
\fBindex_item\fR error value as \-1 (which is the value of \fBERR\fR).
.SH AUTHORS
Juergen Pfeifer.
Manual pages and adaptation for new curses by Eric S. Raymond.