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panel(3)							      panel(3)

       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(3) 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 stdscr window are hidden or
       displayed 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, hide, 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(3), 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.

	      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
	      before a call to doupdate(), but doupdate() is the function
	      responsible 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.

	      returns TRUE if the panel is in the panel stack, FALSE if it is
	      not.  If the panel is a null pointer, return ERR.

	      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(3)).	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
	      argument 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
       successfully and ERR if not.

       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 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
       implementation, 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 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.

       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 usually give a link-error).

       panel.h interface for the panels library

       libpanel.a the panels library itself


       This describes ncurses version 5.7.

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

								 March 1, 2011

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