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<HTML>
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<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
</PRE>
<H2>NAME</H2><PRE>
panel - panel stack extension for curses
</PRE>
<H2>SYNOPSIS</H2><PRE>
<B>#include</B> <B><panel.h></B>
<B>cc</B> <B>[flags]</B> <B>sourcefiles</B> <B>-lpanel</B> <B>-lncurses</B>
<B>PANEL</B> <B>*new_panel(WINDOW</B> <B>*win)</B>
<B>int</B> <B>bottom_panel(PANEL</B> <B>*pan)</B>
<B>int</B> <B>top_panel(PANEL</B> <B>*pan)</B>
<B>int</B> <B>show_panel(PANEL</B> <B>*pan)</B>
<B>void</B> <B>update_panels();</B>
<B>int</B> <B>hide_panel(PANEL</B> <B>*pan)</B>
<B>WINDOW</B> <B>*panel_window(const</B> <B>PANEL</B> <B>*pan)</B>
<B>int</B> <B>replace_panel(PANEL</B> <B>*pan,</B> <B>WINDOW</B> <B>*window)</B>
<B>int</B> <B>move_panel(PANEL</B> <B>*pan,</B> <B>int</B> <B>starty,</B> <B>int</B> <B>startx)</B>
<B>int</B> <B>panel_hidden(const</B> <B>PANEL</B> <B>*pan)</B>
<B>PANEL</B> <B>*panel_above(const</B> <B>PANEL</B> <B>*pan)</B>
<B>PANEL</B> <B>*panel_below(const</B> <B>PANEL</B> <B>*pan)</B>
<B>int</B> <B>set_panel_userptr(PANEL</B> <B>*pan,</B> <B>const</B> <B>void</B> <B>*ptr)</B>
<B>const</B> <B>void</B> <B>*panel_userptr(const</B> <B>PANEL</B> <B>*pan)</B>
<B>int</B> <B>del_panel(PANEL</B> <B>*pan)</B>
</PRE>
<H2>DESCRIPTION</H2><PRE>
Panels are <B><A HREF="ncurses.3x.html">curses(3x)</A></B> windows with the added feature of
depth. Panel functions allow the use of stacked windows
and ensure the proper portions of each window and the
curses <B>stdscr</B> window are hidden or displayed when panels
are added, moved, modified or removed. The set of cur-
rently visible panels is the stack of panels. The <B>stdscr</B>
window is beneath all panels, and is not considered part
of the stack.
A window is associated with every panel. The panel rou-
tines enable you to create, move, hides, and show panels,
as well as position a panel at any desired location in the
stack.
Panel routines are a functional layer added to <B><A HREF="ncurses.3x.html">curses(3x)</A></B>,
make only high-level curses calls, and work anywhere ter-
minfo curses does.
</PRE>
<H2>FUNCTIONS</H2><PRE>
<B>new_panel(win)</B>
allocates a <B>PANEL</B> structure, associates it with
<B>win</B>, places the panel on the top of the stack
(causes it to be displayed above any other
panel) and returns a pointer to the new panel.
<B>void</B> <B>update_panels()</B>
refreshes the virtual screen to reflect the rela-
tions between the panels in the stack, but does not
call doupdate() to refresh the physical screen.
Use this function and not wrefresh or wnoutrefresh.
update_panels() may be called more than once before
a call to doupdate(), but doupdate() is the func-
tion responsible for updating the physical screen.
<B>del_panel(pan)</B>
removes the given panel from the stack and deallo-
cates the <B>PANEL</B> structure (but not its associated
window).
<B>hide_panel(pan)</B>
removes the given panel from the panel stack and
thus hides it from view. The <B>PANEL</B> structure is not
lost, merely removed from the stack.
<B>show_panel(pan)</B>
makes a hidden panel visible by placing it on top
of the panels in the panel stack. See COMPATIBILITY
below.
<B>top_panel(pan)</B>
puts the given visible panel on top of all panels
in the stack. See COMPATIBILITY below.
<B>bottom_panel(pan)</B>
puts panel at the bottom of all panels.
<B>move_panel(pan,starty,startx)</B>
moves the given panel window so that its upper-left
corner is at <B>starty</B>, <B>startx</B>. It does not change
the position of the panel in the stack. Be sure to
use this function, not <B>mvwin()</B>, to move a panel
window.
<B>replace_panel(pan,window)</B>
replaces the current window of panel with <B>window</B>
(useful, for example if you want to resize a panel;
if you're using <B>ncurses</B>, you can call <B>replace_panel</B>
on the output of <B><A HREF="wresize.3x.html">wresize(3x)</A></B>). It does not change
the position of the panel in the stack.
<B>panel_above(pan)</B>
returns a pointer to the panel above pan. If the
panel argument is <B>(PANEL</B> <B>*)0</B>, it returns a pointer
to the bottom panel in the stack.
<B>panel_below(pan)</B>
returns a pointer to the panel just below pan. If
the panel argument is <B>(PANEL</B> <B>*)0</B>, it returns a
pointer to the top panel in the stack.
<B>set_panel_userptr(pan,ptr)</B>
sets the panel's user pointer.
<B>panel_userptr(pan)</B>
returns the user pointer for a given panel.
<B>panel_window(pan)</B>
returns a pointer to the window of the given panel.
</PRE>
<H2>DIAGNOSTICS</H2><PRE>
Each routine that returns a pointer returns <B>NULL</B> if an
error occurs. Each routine that returns an int value
returns <B>OK</B> if it executes successfully and <B>ERR</B> if not.
</PRE>
<H2>COMPATIBILITY</H2><PRE>
Reasonable care has been taken to ensure compatibility
with the native panel facility introduced in SVr3.2
(inspection of the SVr4 manual pages suggests the program-
ming interface is unchanged). The <B>PANEL</B> data structures
are merely similar. The programmer is cautioned not to
directly use <B>PANEL</B> fields.
The functions <B>show_panel()</B> and <B>top_panel()</B> are identical
in this implementation, and work equally well with dis-
played or hidden panels. In the native System V implemen-
tation, <B>show_panel()</B> is intended for making a hidden panel
visible (at the top of the stack) and <B>top_panel()</B> is
intended for making an already-visible panel move to the
top of the stack. You are cautioned to use the correct
function to ensure compatibility with native panel
libraries.
</PRE>
<H2>NOTE</H2><PRE>
In your library list, libpanel.a should be before libn-
curses.a; that is, you want to say `-lpanel -lncurses',
not the other way around (which would give you a link
error using GNU <B><A HREF="ld.1.html">ld(1)</A></B> and some other linkers).
</PRE>
<H2>FILES</H2><PRE>
panel.h interface for the panels library
libpanel.a the panels library itself
</PRE>
<H2>SEE ALSO</H2><PRE>
<B><A HREF="ncurses.3x.html">curses(3x)</A></B>
</PRE>
<H2>AUTHOR</H2><PRE>
Originally written by Warren Tucker <wht@n4hgf.mt-
park.ga.us>, primarily to assist in porting u386mon to
systems without a native panels library. Repackaged for
ncurses by Zeyd ben-Halim.
</PRE>
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