+</PRE><H2><a name="h2-FUNCTIONS">FUNCTIONS</a></H2><PRE>
+
+</PRE><H3><a name="h3-bottom_panel">bottom_panel</a></H3><PRE>
+ <STRONG>bottom_panel(</STRONG><EM>pan</EM><STRONG>)</STRONG> puts panel <EM>pan</EM> at the bottom of all panels.
+
+
+</PRE><H3><a name="h3-ceiling_panel">ceiling_panel</a></H3><PRE>
+ <STRONG>ceiling_panel(</STRONG><EM>sp</EM><STRONG>)</STRONG> acts like <STRONG>panel_below(NULL)</STRONG>, for the given <STRONG>SCREEN</STRONG> <EM>sp</EM>.
+
+
+</PRE><H3><a name="h3-del_panel">del_panel</a></H3><PRE>
+ <STRONG>del_panel(</STRONG><EM>pan</EM><STRONG>)</STRONG> removes the given panel <EM>pan</EM> from the stack and deallo-
+ cates the <STRONG>PANEL</STRONG> structure (but not its associated window).
+
+
+</PRE><H3><a name="h3-ground_panel">ground_panel</a></H3><PRE>
+ <STRONG>ground_panel(</STRONG><EM>sp</EM><STRONG>)</STRONG> acts like <STRONG>panel_above(NULL)</STRONG>, for the given <STRONG>SCREEN</STRONG> <EM>sp</EM>.
+
+
+</PRE><H3><a name="h3-hide_panel">hide_panel</a></H3><PRE>
+ <STRONG>hide_panel(</STRONG><EM>pan</EM><STRONG>)</STRONG> removes the given panel <EM>pan</EM> from the panel stack and
+ thus hides it from view. The <STRONG>PANEL</STRONG> structure is not lost, merely
+ removed from the stack.
+
+
+</PRE><H3><a name="h3-move_panel">move_panel</a></H3><PRE>
+ <STRONG>move_panel(</STRONG><EM>pan</EM><STRONG>,</STRONG><EM>starty</EM><STRONG>,</STRONG><EM>startx</EM><STRONG>)</STRONG> moves the given panel <EM>pan</EM>'s window so
+ that its upper-left corner is at <EM>starty</EM>, <EM>startx</EM>. It does not change
+ the position of the panel in the stack. Be sure to use this function,
+ not <STRONG><A HREF="curs_window.3x.html">mvwin(3x)</A></STRONG>, to move a panel window.
+
+
+</PRE><H3><a name="h3-new_panel">new_panel</a></H3><PRE>
+ <STRONG>new_panel(</STRONG><EM>win</EM><STRONG>)</STRONG> allocates a <STRONG>PANEL</STRONG> structure, associates it with <EM>win</EM>,
+ 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.
+
+
+</PRE><H3><a name="h3-panel_above">panel_above</a></H3><PRE>
+ <STRONG>panel_above(</STRONG><EM>pan</EM><STRONG>)</STRONG> returns a pointer to the panel above <EM>pan</EM>. If the
+ panel argument is <STRONG>(PANEL</STRONG> <STRONG>*)0</STRONG>, it returns a pointer to the bottom panel
+ in the stack.
+
+
+</PRE><H3><a name="h3-panel_below">panel_below</a></H3><PRE>
+ <STRONG>panel_below(</STRONG><EM>pan</EM><STRONG>)</STRONG> returns a pointer to the panel just below <EM>pan</EM>. If the
+ panel argument is <STRONG>(PANEL</STRONG> <STRONG>*)0</STRONG>, it returns a pointer to the top panel in
+ the stack.
+
+
+</PRE><H3><a name="h3-panel_hidden">panel_hidden</a></H3><PRE>
+ <STRONG>panel_hidden(</STRONG><EM>pan</EM><STRONG>)</STRONG> returns <STRONG>TRUE</STRONG> if the panel <EM>pan</EM> is in the panel stack,
+ <STRONG>FALSE</STRONG> if it is not. If the panel is a null pointer, return <STRONG>ERR</STRONG>.
+
+
+</PRE><H3><a name="h3-panel_userptr">panel_userptr</a></H3><PRE>
+ <STRONG>panel_userptr(</STRONG><EM>pan</EM><STRONG>)</STRONG> returns the user pointer for a given panel <EM>pan</EM>.
+
+
+</PRE><H3><a name="h3-panel_window">panel_window</a></H3><PRE>
+ <STRONG>panel_window(</STRONG><EM>pan</EM><STRONG>)</STRONG> returns a pointer to the window of the given panel
+ <EM>pan</EM>.
+
+
+</PRE><H3><a name="h3-replace_panel">replace_panel</a></H3><PRE>
+ <STRONG>replace_panel(</STRONG><EM>pan</EM><STRONG>,</STRONG><EM>window</EM><STRONG>)</STRONG> replaces the current window of panel <EM>pan</EM> with
+ <EM>window</EM> This is useful, for example if you want to resize a panel. In
+ <STRONG>ncurses</STRONG>, you can call <STRONG>replace_panel</STRONG> to resize a panel using a window
+ resized with <STRONG><A HREF="wresize.3x.html">wresize(3x)</A></STRONG>. It does not change the position of the panel
+ in the stack.
+
+
+</PRE><H3><a name="h3-set_panel_userptr">set_panel_userptr</a></H3><PRE>
+ <STRONG>set_panel_userptr(</STRONG><EM>pan</EM><STRONG>,</STRONG><EM>ptr</EM><STRONG>)</STRONG> sets the panel's user pointer.
+
+
+</PRE><H3><a name="h3-show_panel">show_panel</a></H3><PRE>
+ <STRONG>show_panel(</STRONG><EM>pan</EM><STRONG>)</STRONG> makes a hidden panel visible by placing it on top of
+ the panels in the panel stack. See <STRONG>COMPATIBILITY</STRONG> below.
+
+
+</PRE><H3><a name="h3-top_panel">top_panel</a></H3><PRE>
+ <STRONG>top_panel(</STRONG><EM>pan</EM><STRONG>)</STRONG> puts the given visible panel <EM>pan</EM> on top of all panels in
+ the stack. See <STRONG>COMPATIBILITY</STRONG> below.
+
+
+</PRE><H3><a name="h3-update_panels">update_panels</a></H3><PRE>
+ <STRONG>update_panels()</STRONG> refreshes the <EM>virtual</EM> <EM>screen</EM> to reflect the relations
+ between the panels in the stack, but does not call <STRONG><A HREF="curs_refresh.3x.html">doupdate(3x)</A></STRONG> to
+ refresh the <EM>physical</EM> <EM>screen</EM>. Use this function and not <STRONG><A HREF="curs_refresh.3x.html">wrefresh(3x)</A></STRONG> or
+ <STRONG><A HREF="curs_refresh.3x.html">wnoutrefresh(3x)</A></STRONG>.
+
+ <STRONG>update_panels</STRONG> may be called more than once before a call to <STRONG>doupdate</STRONG>,
+ but <STRONG>doupdate</STRONG> is the function responsible for updating the <EM>physical</EM>
+ <EM>screen</EM>.
+
+
+</PRE><H2><a name="h2-DIAGNOSTICS">DIAGNOSTICS</a></H2><PRE>
+ Each routine that returns a pointer returns <STRONG>NULL</STRONG> if an error occurs.
+ Each routine that returns an int value returns <STRONG>OK</STRONG> if it executes suc-
+ cessfully and <STRONG>ERR</STRONG> if not.
+
+ Except as noted, the <EM>pan</EM> and <EM>window</EM> parameters must be non-null. If
+ those are null, an error is returned.
+
+ The <STRONG>move_panel</STRONG> function uses <STRONG><A HREF="curs_window.3x.html">mvwin(3x)</A></STRONG>, and will return an error if
+ <STRONG>mvwin</STRONG> returns an error.
+
+
+</PRE><H2><a name="h2-COMPATIBILITY">COMPATIBILITY</a></H2><PRE>
+ Reasonable care has been taken to ensure compatibility with the
+ native panel facility introduced in System V (inspection of the SVr4
+ manual pages suggests the programming interface is unchanged). The
+ <STRONG>PANEL</STRONG> data structures are merely similar. The programmer is cau-
+ tioned not to directly use <STRONG>PANEL</STRONG> fields.
+
+ The functions <STRONG>show_panel</STRONG> and <STRONG>top_panel</STRONG> are identical in this implemen-
+ tation, and work equally well with displayed or hidden panels. In the
+ native System V implementation, <STRONG>show_panel</STRONG> is intended for making a
+ hidden panel visible (at the top of the stack) and <STRONG>top_panel</STRONG> 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 compat-
+ ibility with native panel libraries.
+
+
+</PRE><H2><a name="h2-NOTE">NOTE</a></H2><PRE>
+ In your library list, libpanel.a should be before libncurses.a; that
+ is, you should say "-lpanel -lncurses", not the other way around (which
+ would give a link-error with static libraries).
+
+
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+ The panel facility was documented in SVr4.2 in <EM>Character</EM> <EM>User</EM> <EM>Interface</EM>
+ <EM>Programming</EM> <EM>(UNIX</EM> <EM>SVR4.2)</EM>.
+
+ It is not part of X/Open Curses.
+
+ A few implementations exist:
+
+ <STRONG>o</STRONG> Systems based on SVr4 source code, e.g., Solaris, provide this
+ library.
+
+ <STRONG>o</STRONG> <STRONG>ncurses</STRONG> (since version 0.6 in 1993) and <STRONG>PDCurses</STRONG> (since version 2.2
+ in 1995) provide a panel library whose common ancestor was a public
+ domain implementation by Warren Tucker published in <EM>u386mon</EM> 2.20
+ (1990).
+
+ According to Tucker, the SystemV panel library was first released
+ in SVr3.2 (1988), and his implementation helped with a port to
+ SVr3.1 (1987).
+
+ Several developers have improved each of these; they are no longer
+ the same as Tucker's implementation.
+
+ <STRONG>o</STRONG> NetBSD 8 (2018) has a panel library begun by Valery Ushakov in
+ 2015. This is based on the AT&T documentation.
+
+
+</PRE><H2><a name="h2-FILES">FILES</a></H2><PRE>