.\"***************************************************************************
-.\" Copyright (c) 1998-2016,2017 Free Software Foundation, Inc. *
+.\" Copyright 2018-2021,2022 Thomas E. Dickey *
+.\" Copyright 1998-2016,2017 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: panel.3x,v 1.24 2017/11/25 20:31:13 tom Exp $
+.\" $Id: panel.3x,v 1.42 2022/02/12 20:03:40 tom Exp $
.TH panel 3X ""
.ie \n(.g .ds `` \(lq
.el .ds `` ``
.ie \n(.g .ds '' \(rq
.el .ds '' ''
+.de bP
+.ie n .IP \(bu 4
+.el .IP \(bu 2
+..
.SH NAME
panel \- panel stack extension for curses
.SH SYNOPSIS
-\fB#include <panel.h>\fR
+\fB#include <panel.h>\fP
.P
-\fBcc [flags] sourcefiles \-lpanel \-lncurses\fR
+\fBcc [flags] sourcefiles \-lpanel \-lncurses\fP
.P
-\fBPANEL *new_panel(WINDOW *win);\fR
+\fBPANEL *new_panel(WINDOW *\fIwin\fB);\fR
+.sp
+\fBint bottom_panel(PANEL *\fIpan\fB);\fR
.br
-\fBint bottom_panel(PANEL *pan);\fR
+\fBint top_panel(PANEL *\fIpan\fB);\fR
.br
-\fBint top_panel(PANEL *pan);\fR
+\fBint show_panel(PANEL *\fIpan\fB);\fR
.br
-\fBint show_panel(PANEL *pan);\fR
+\fBvoid update_panels(void);\fP
.br
-\fBvoid update_panels();\fR
+\fBint hide_panel(PANEL *\fIpan\fB);\fR
+.sp
+\fBWINDOW *panel_window(const PANEL *\fIpan\fB);\fR
.br
-\fBint hide_panel(PANEL *pan);\fR
+\fBint replace_panel(PANEL *\fIpan\fB, WINDOW *\fIwindow\fB);\fR
.br
-\fBWINDOW *panel_window(const PANEL *pan);\fR
+\fBint move_panel(PANEL *\fIpan\fB, int \fIstarty\fB, int \fIstartx\fB);\fR
.br
-\fBint replace_panel(PANEL *pan, WINDOW *window);\fR
+\fBint panel_hidden(const PANEL *\fIpan\fB);\fR
+.sp
+\fBPANEL *panel_above(const PANEL *\fIpan\fB);\fR
.br
-\fBint move_panel(PANEL *pan, int starty, int startx);\fR
+\fBPANEL *panel_below(const PANEL *\fIpan\fB);\fR
+.sp
+\fBint set_panel_userptr(PANEL *\fIpan\fB, const void *\fIptr\fB);\fR
.br
-\fBint panel_hidden(const PANEL *pan);\fR
+\fBconst void *panel_userptr(const PANEL *\fIpan\fB);\fR
+.sp
+\fBint del_panel(PANEL *\fIpan\fB);\fR
+.sp
+\fR/* ncurses-extensions */\fP
.br
-\fBPANEL *panel_above(const PANEL *pan);\fR
+\fBPANEL *ground_panel(SCREEN *\fIsp\fB);\fR
.br
-\fBPANEL *panel_below(const PANEL *pan);\fR
-.br
-\fBint set_panel_userptr(PANEL *pan, const void *ptr);\fR
-.br
-\fBconst void *panel_userptr(const PANEL *pan);\fR
-.br
-\fBint del_panel(PANEL *pan);\fR
+\fBPANEL *ceiling_panel(SCREEN *\fIsp\fB);\fR
.br
.SH DESCRIPTION
-Panels are \fBcurses\fR(3X) 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 \fBstdscr\fR window are
+Panels are \fBcurses\fP(3X) 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 \fBstdscr\fP 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
-\fBstdscr\fR window is beneath all panels, and is not considered part
+The set of currently visible panels is the stack of panels.
+The
+\fBstdscr\fP window is beneath all panels, and is not considered part
of the stack.
.P
-A window is associated with every panel. The panel routines enable
+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.
.P
-Panel routines are a functional layer added to \fBcurses\fR(3X), make only
+Panel routines are a functional layer added to \fBcurses\fP(3X), make only
high-level curses calls, and work anywhere terminfo curses does.
.SH FUNCTIONS
-.TP
-.B new_panel(win)
-allocates a \fBPANEL\fR structure, associates it with
-\fBwin\fR, places the panel on the top of the stack (causes it
-to be displayed above any other panel) and returns a
+.\" ---------
+.SS bottom_panel
+\fBbottom_panel(\fIpan\fB)\fR
+puts panel \fIpan\fP at the bottom of all panels.
+.\" ---------
+.SS ceiling_panel
+\fBceiling_panel(\fIsp\fB)\fR
+acts like \fBpanel_below(NULL)\fP, for the given \fBSCREEN\fP \fIsp\fP.
+.\" ---------
+.SS del_panel
+\fBdel_panel(\fIpan\fB)\fR
+removes the given panel \fIpan\fP from the stack and deallocates the
+\fBPANEL\fP structure (but not its associated window).
+.\" ---------
+.SS ground_panel
+\fBground_panel(\fIsp\fB)\fR
+acts like \fBpanel_above(NULL)\fP, for the given \fBSCREEN\fP \fIsp\fP.
+.\" ---------
+.SS hide_panel
+\fBhide_panel(\fIpan\fB)\fR
+removes the given panel \fIpan\fP from the panel stack
+and thus hides it from view.
+The \fBPANEL\fP structure is not lost, merely removed from the stack.
+.\" ---------
+.SS move_panel
+\fBmove_panel(\fIpan\fB,\fIstarty\fB,\fIstartx\fB)\fR
+moves the given panel \fIpan\fP's window so that its upper-left corner is at
+\fIstarty\fP, \fIstartx\fP.
+It does not change the position of the panel in the stack.
+Be sure to use this function, not \fBmvwin\fP(3X), to move a panel window.
+.\" ---------
+.SS new_panel
+\fBnew_panel(\fIwin\fB)\fR allocates a \fBPANEL\fR structure,
+associates it with \fIwin\fP, 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.
-.TP
-.B update_panels
-refreshes the virtual screen to reflect the relations between the
-panels in the stack, but does not call \fBdoupdate\fP to refresh the
-physical screen.
-Use this function and not \fBwrefresh\fP or \fBwnoutrefresh\fP.
-.B update_panels
-may be called more than once before a call to
-\fBdoupdate\fP, but \fBdoupdate\fP is the function responsible for updating
-the physical screen.
-.TP
-.B del_panel(pan)
-removes the given panel from the stack and deallocates the
-\fBPANEL\fR structure (but not its associated window).
-.TP
-.B hide_panel(pan)
-removes the given panel from the panel stack and thus hides it from
-view. The \fBPANEL\fR structure is not lost, merely removed from the stack.
-.TP
-.B panel_hidden(pan)
-returns \fBTRUE\fP if the panel is in the panel stack,
+.\" ---------
+.SS panel_above
+\fBpanel_above(\fIpan\fB)\fR
+returns a pointer to the panel above \fIpan\fP.
+If the panel argument is
+\fB(PANEL *)0\fP, it returns a pointer to the bottom panel in the stack.
+.\" ---------
+.SS panel_below
+\fBpanel_below(\fIpan\fB)\fR
+returns a pointer to the panel just below \fIpan\fP.
+If the panel argument
+is \fB(PANEL *)0\fP, it returns a pointer to the top panel in the stack.
+.\" ---------
+.SS panel_hidden
+\fBpanel_hidden(\fIpan\fB)\fR
+returns \fBTRUE\fP if the panel \fIpan\fP is in the panel stack,
\fBFALSE\fP if it is not.
If the panel is a null pointer, return \fBERR\fP.
-.TP
-.B show_panel(pan)
-makes a hidden panel visible by placing it on top of the panels in the
-panel stack. See COMPATIBILITY below.
-.TP
-.B top_panel(pan)
-puts the given visible panel on top of all panels in the stack. See
-COMPATIBILITY below.
-.TP
-.B bottom_panel(pan)
-puts panel at the bottom of all panels.
-.TP
-.B move_panel(pan,starty,startx)
-moves the given panel window so that its upper-left corner is at
-\fBstarty\fR, \fBstartx\fR. It does not change the position of the
-panel in the stack. Be sure to use this function, not \fBmvwin\fR,
-to move a panel window.
-.TP
-.B replace_panel(pan,window)
-replaces the current window of panel with \fBwindow\fR (useful, for
-example if you want to resize a panel; if you're using \fBncurses\fR,
-you can call \fBreplace_panel\fR on the output of \fBwresize\fR(3X)).
+.\" ---------
+.SS panel_userptr
+\fBpanel_userptr(\fIpan\fB)\fR
+returns the user pointer for a given panel \fIpan\fP.
+.\" ---------
+.SS panel_window
+\fBpanel_window(\fIpan\fB)\fR
+returns a pointer to the window of the given panel \fIpan\fP.
+.\" ---------
+.SS replace_panel
+\fBreplace_panel(\fIpan\fB,\fIwindow\fB)\fR
+replaces the current window of panel \fIpan\fP with \fIwindow\fP
+This is useful, for example if you want to resize a panel.
+In \fBncurses\fP, you can call \fBreplace_panel\fP
+to resize a panel using a window resized with \fBwresize\fP(3X).
It does not change the position of the panel in the stack.
-.TP
-.B panel_above(pan)
-returns a pointer to the panel above pan. If the panel argument is
-\fB(PANEL *)0\fR, it returns a pointer to the bottom panel in the stack.
-.TP
-.B panel_below(pan)
-returns a pointer to the panel just below pan. If the panel argument
-is \fB(PANEL *)0\fR, it returns a pointer to the top panel in the stack.
-.TP
-.B set_panel_userptr(pan,ptr)
+.\" ---------
+.SS set_panel_userptr
+\fBset_panel_userptr(\fIpan\fB,\fIptr\fB)\fR
sets the panel's user pointer.
-.TP
-.B panel_userptr(pan)
-returns the user pointer for a given panel.
-.TP
-.B panel_window(pan)
-returns a pointer to the window of the given panel.
+.\" ---------
+.SS show_panel
+\fBshow_panel(\fIpan\fB)\fR
+makes a hidden panel visible by placing it on top of the panels in the
+panel stack.
+See \fBCOMPATIBILITY\fP below.
+.\" ---------
+.SS top_panel
+\fBtop_panel(\fIpan\fB)\fR
+puts the given visible panel \fIpan\fP on top of all panels in the stack.
+See \fBCOMPATIBILITY\fP below.
+.\" ---------
+.SS update_panels
+\fBupdate_panels()\fR
+refreshes the \fIvirtual screen\fP to reflect the relations between the
+panels in the stack, but does not call \fBdoupdate\fP(3X) to refresh the
+\fIphysical screen\fP.
+Use this function and not \fBwrefresh\fP(3X) or \fBwnoutrefresh\fP(3X).
+.PP
+\fBupdate_panels\fP may be called more than once before a call to
+\fBdoupdate\fP, but \fBdoupdate\fP is the function responsible for updating
+the \fIphysical screen\fP.
.SH DIAGNOSTICS
-Each routine that returns a pointer returns \fBNULL\fR if an error
-occurs. Each routine that returns an int value returns \fBOK\fR if it
-executes successfully and \fBERR\fR if not.
+Each routine that returns a pointer returns \fBNULL\fP if an error
+occurs.
+Each routine that returns an int value returns \fBOK\fP if it
+executes successfully and \fBERR\fP if not.
+.PP
+Except as noted, the \fIpan\fP and \fIwindow\fP parameters must be non-null.
+If those are null, an error is returned.
+.PP
+The \fBmove_panel\fP function uses \fBmvwin\fP(3X),
+and will return an error if \fBmvwin\fP returns an error.
.SH COMPATIBILITY
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 \fBPANEL\fR data structures are merely similar. The programmer
-is cautioned not to directly use \fBPANEL\fR fields.
+The \fBPANEL\fP data structures are merely similar.
+The programmer
+is cautioned not to directly use \fBPANEL\fP fields.
.P
-The functions \fBshow_panel\fR and \fBtop_panel\fR are identical
+The functions \fBshow_panel\fP and \fBtop_panel\fP are identical
in this implementation, and work equally well with displayed or hidden
-panels. In the native System V implementation, \fBshow_panel\fR is
+panels.
+In the native System V implementation, \fBshow_panel\fP is
intended for making a hidden panel visible (at the top of the stack)
-and \fBtop_panel\fR is intended for making an already-visible panel
-move to the top of the stack. You are cautioned to use the correct
+and \fBtop_panel\fP 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.
.SH NOTE
In your library list, libpanel.a should be before libncurses.a; that is,
.PP
It is not part of X/Open Curses.
.PP
-Aside from ncurses, only systems based on SVr4 source code,
-e.g., Solaris provide this library.
+A few implementations exist:
+.bP
+Systems based on SVr4 source code,
+e.g., Solaris, provide this library.
+.bP
+\fBncurses\fP (since version 0.6 in 1993)
+and \fBPDCurses\fP (since version 2.2 in 1995)
+provide a panel library whose common ancestor
+was a public domain implementation by Warren Tucker
+published in \fIu386mon\fP 2.20 (1990).
+.IP
+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).
+.IP
+Several developers have improved each of these;
+they are no longer the same as Tucker's implementation.
+.bP
+NetBSD 8 (2018)
+has a panel library begun by Valery Ushakov in 2015.
+This is based on the AT&T documentation.
.SH FILES
.P
panel.h
libpanel.a
the panels library itself
.SH SEE ALSO
-\fBcurses\fR(3X),
-\fBcurs_variables\fR(3X),
+\fBcurses\fP(3X),
+\fBcurs_variables\fP(3X),
.PP
-This describes \fBncurses\fR
+This describes \fBncurses\fP
version @NCURSES_MAJOR@.@NCURSES_MINOR@ (patch @NCURSES_PATCH@).
.SH AUTHOR
+.PP
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.
+primarily to assist in porting \fIu386mon\fP to systems without a native
+panels library.
+.PP
+Repackaged for ncurses by Zeyd ben-Halim.
+.PP
+Juergen Pfeifer and Thomas E. Dickey revised/improved the library.
projects / ncurses.git / blobdiff