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panel(3X)							     panel(3X)

       panel - panel stack extension for curses

       #include	<panel.h>

       cc [flags] sourcefiles -lpanel -lncurses

       PANEL *new_panel(WINDOW *win)
       int bottom_panel(PANEL *pan)
       int top_panel(PANEL *pan)
       int show_panel(PANEL *pan)
       void update_panels();
       int hide_panel(PANEL *pan)
       WINDOW *panel_window(const PANEL	*pan)
       int replace_panel(PANEL *pan, WINDOW *window)
       int move_panel(PANEL *pan, int starty, int startx)
       int panel_hidden(const PANEL *pan)
       PANEL *panel_above(const	PANEL *pan)
       PANEL *panel_below(const	PANEL *pan)
       int set_panel_userptr(PANEL *pan, const void *ptr)
       const void *panel_userptr(const PANEL *pan)
       int del_panel(PANEL *pan)

       Panels  are  curses(3X) windows with the	added feature of depth.	 Panel
       functions allow the use of stacked windows and ensure the  proper  por-
       tions  of  each	window and the curses stdscr window are	hidden or dis-
       played when panels are added, moved, modified or	removed.  The  set  of
       currently  visible panels is the	stack of panels.  The stdscr window is
       beneath all panels, and is not considered part of the stack.

       A window	is associated with every panel.	The panel routines 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  curses(3X),  make  only
       high-level curses calls,	and work anywhere terminfo curses does.

	      allocates	  a   PANEL  structure,	associates it with win,	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.

       void update_panels()
	      refreshes	 the  virtual  screen to reflect the relations 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  be-
	      fore  a  call  to	doupdate(), but	doupdate() is the function re-
	      sponsible	for updating the physical screen.

	      removes the given	panel from  the	  stack	 and  deallocates  the
	      PANEL structure (but not its associated window).

	      removes  the  given panel	from the panel stack and thus hides it
	      from view. The PANEL structure is	not lost, merely removed  from
	      the stack.

	      makes  a hidden panel visible by placing it on top of the	panels
	      in the panel stack. See COMPATIBILITY below.

	      puts the given visible panel on top of all panels	in the	stack.
	      See COMPATIBILITY	below.

	      puts panel at the	bottom of all panels.

	      moves the	given panel window so that its upper-left corner is at
	      starty, startx.  It does not change the position of the panel in
	      the stack.  Be sure to use this function,	not mvwin(), to	move a
	      panel window.

	      replaces the current window of panel with	 window	 (useful,  for
	      example  if you want to resize a panel; if you're	using ncurses,
	      you can call replace_panel on the	output	of  wresize(3X)).   It
	      does not change the position of the panel	in the stack.

	      returns a	pointer	to the panel above pan.	 If the	panel argument
	      is (PANEL	*)0, it	returns	a pointer to the bottom	panel  in  the

	      returns a	pointer	to the panel just below	pan.  If the panel ar-
	      gument is	(PANEL *)0, it returns a pointer to the	top  panel  in
	      the stack.

	      sets the panel's user pointer.

	      returns the user pointer for a given panel.

	      returns a	pointer	to the window of the given panel.

       Each  routine  that  returns a pointer returns NULL if an error occurs.
       Each routine that returns an int	value returns OK if it	executes  suc-
       cessfully and ERR if not.

       Reasonable care has been	taken to  ensure  compatibility	with  the  na-
       tive  panel facility introduced in SVr3.2 (inspection of	the SVr4  man-
       ual  pages suggests the programming interface is	unchanged).  The PANEL
       data structures are merely  similar. The	 programmer is	cautioned  not
       to directly use PANEL fields.

       The functions show_panel() and top_panel() are identical	in this	imple-
       mentation, and work equally well	with displayed or hidden  panels.   In
       the native System V implementation, show_panel()	is intended for	making
       a hidden	panel visible (at the top of the stack)	and top_panel()	is in-
       tended  for  making  an	already-visible	 panel	move to	the top	of the
       stack. You are cautioned	to use the correct function to ensure compati-
       bility with native panel	libraries.

       In  your	 library  list,	libpanel.a should be before libncurses.a; that
       is, you want to say `-lpanel  -lncurses',  not  the  other  way	around
       (which would give you a link error using	GNU ld(1) and some other link-

       panel.h interface for the panels	library

       libpanel.a the panels library itself


       Originally written by Warren Tucker <>,  primar-
       ily to assist in	porting	u386mon	to systems without a native panels li-
       brary.  Repackaged for ncurses by Zeyd ben-Halim.



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