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146 lines
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****************************************************************************
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* Copyright (c) 1998-2006,2010 Free Software Foundation, Inc. *
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****************************************************************************
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* @Id: mitem_current.3x,v 1.13 2010/12/04 18:40:45 tom Exp @
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-->
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<HTML>
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<HEAD>
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<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
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<meta name="generator" content="Manpage converted by man2html - see http://invisible-island.net/scripts/readme.html#others_scripts">
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<TITLE>mitem_current 3x</TITLE>
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<link rev=made href="mailto:bug-ncurses@gnu.org">
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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</HEAD>
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<BODY>
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<H1 class="no-header">mitem_current 3x</H1>
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<PRE>
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<STRONG><A HREF="mitem_current.3x.html">mitem_current(3x)</A></STRONG> <STRONG><A HREF="mitem_current.3x.html">mitem_current(3x)</A></STRONG>
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</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
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<STRONG>mitem_current</STRONG> - set and get current_menu_item
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</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
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<STRONG>#include</STRONG> <STRONG><menu.h></STRONG>
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int set_current_item(MENU *menu, const ITEM *item);
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ITEM *current_item(const MENU *menu);
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int set_top_row(MENU *menu, int row);
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int top_row(const MENU *menu);
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int item_index(const ITEM *item);
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</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
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The function <STRONG>set_current_item</STRONG> sets the current item (the
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item on which the menu cursor is positioned). <STRONG>cur-</STRONG>
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<STRONG>rent_item</STRONG> returns a pointer to the current item in the
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given menu.
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The function <STRONG>set_top_row</STRONG> sets the top row of the menu to
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show the given row (the top row is initially 0, and is
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reset to this value whenever the <STRONG>O_ROWMAJOR</STRONG> option is tog-
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gled). The item leftmost on the given row becomes cur-
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rent. The function <STRONG>top_row</STRONG> returns the number of the top
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menu row being displayed.
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The function <STRONG>item_index</STRONG> returns the (zero-origin) index of
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<EM>item</EM> in the menu's item pointer list.
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</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
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<STRONG>current_item</STRONG> returns a pointer (which may be <STRONG>NULL</STRONG>). It
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does not set errno.
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<STRONG>top_row</STRONG> and <STRONG>item_index</STRONG> return <STRONG>ERR</STRONG> (the general <STRONG>curses</STRONG>
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error value) if their <EM>menu</EM> parameter is <STRONG>NULL</STRONG>.
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<STRONG>set_current_item</STRONG> and <STRONG>set_top_row</STRONG> return one of the follow-
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ing:
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<STRONG>E_OK</STRONG> The routine succeeded.
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<STRONG>E_BAD_ARGUMENT</STRONG>
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Routine detected an incorrect or out-of-range argu-
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ment.
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<STRONG>E_BAD_STATE</STRONG>
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Routine was called from an initialization or termina-
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tion function.
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<STRONG>E_NOT_CONNECTED</STRONG>
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No items are connected to the menu.
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<STRONG>E_SYSTEM_ERROR</STRONG>
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System error occurred (see <STRONG>errno</STRONG>).
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</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
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<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="menu.3x.html">menu(3x)</A></STRONG>.
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</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
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The header file <STRONG><menu.h></STRONG> automatically includes the header
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file <STRONG><curses.h></STRONG>.
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</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
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These routines emulate the System V menu library. They
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were not supported on Version 7 or BSD versions.
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The SVr4 menu library documentation specifies the <STRONG>top_row</STRONG>
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and <STRONG>index_item</STRONG> error value as -1 (which is the value of
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<STRONG>ERR</STRONG>).
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</PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
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Juergen Pfeifer. Manual pages and adaptation for new
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curses by Eric S. Raymond.
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<STRONG><A HREF="mitem_current.3x.html">mitem_current(3x)</A></STRONG>
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</PRE>
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<div class="nav">
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<ul>
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<li><a href="#h2-NAME">NAME</a></li>
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<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
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<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
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<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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<li><a href="#h2-NOTES">NOTES</a></li>
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<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
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<li><a href="#h2-AUTHORS">AUTHORS</a></li>
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</ul>
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</div>
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</BODY>
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</HTML>
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