103 lines
3.0 KiB
Groff
103 lines
3.0 KiB
Groff
.\" $NetBSD: panel_above.3,v 1.8 2015/11/01 14:47:54 wiz Exp $
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.\"
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.\" Copyright (c) 2015 Valery Ushakov
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd October 28, 2015
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.Dt PANEL_ABOVE 3
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.Os
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.Sh NAME
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.Nm top_panel ,
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.Nm bottom_panel ,
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.Nm panel_above ,
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.Nm panel_below
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.Nd z-order of panels
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.Sh LIBRARY
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.Lb libpanel
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.Sh SYNOPSIS
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.In panel.h
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.\"
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.Ft int
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.Fn top_panel "PANEL *p"
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.\"
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.Ft int
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.Fn bottom_panel "PANEL *p"
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.\"
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.Ft PANEL *
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.Fn panel_above "PANEL *p"
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.\"
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.Ft PANEL *
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.Fn panel_below "PANEL *p"
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.\"
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.Sh DESCRIPTION
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Newly created panels are placed at the top of the deck.
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The z-order of a visible panel can be changed with the functions
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.Fn top_panel
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and
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.Fn bottom_panel
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that move it to the top and bottom of the deck respectively.
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.Pp
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For a visible panel its neighbors in the deck can be obtained with
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.Fn panel_above
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and
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.Fn panel_below .
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The bottom and top panels can be obtained by passing a
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.Dv NULL
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argument to
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.Fn panel_above
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and
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.Fn panel_below ,
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respectively.
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.Sh IMPLEMENTATION NOTES
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The
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.Fn top_panel
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function will return an error if the panel is currently hidden.
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Use
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.Xr show_panel 3
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to make a hidden panel visible again and put it at the top of the deck.
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This is the behaviour specified by the original
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.At V
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panel library.
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.Pp
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In the ncurses implementation of the panel library
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.Fn show_panel
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and
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.Fn top_panel
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are identical and handle both visible and hidden panels.
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This may be a source of bugs in programs tested only against ncurses.
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.Sh RETURN VALUES
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Functions returning pointers will return
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.Dv NULL
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if an error is detected.
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The functions that return an int will return one of the following
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values:
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.Pp
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.Bl -tag -width ".Dv ERR" -compact
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.It Dv OK
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The function completed successfully.
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.It Dv ERR
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An error occurred in the function.
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.El
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.Sh SEE ALSO
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.Xr panel 3
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