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84cf9f63bf
+ improve manual page for panel library, extending the portability section as well as documenting error-returns. + show tic's version when installing terminal database in run_tic.sh + correct check for gcc vs other compilers used in ncurses 6.0, from FreeBSD patch by Kyle Evans (cf: 20150725). + add notes for 6.2 to INSTALL.
280 lines
10 KiB
Plaintext
280 lines
10 KiB
Plaintext
.\"***************************************************************************
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.\" Copyright 2018-2019,2020 Thomas E. Dickey *
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.\" Copyright 1998-2016,2017 Free Software Foundation, Inc. *
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.\" *
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.\" Permission is hereby granted, free of charge, to any person obtaining a *
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.\" copy of this software and associated documentation files (the *
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.\" "Software"), to deal in the Software without restriction, including *
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.\" without limitation the rights to use, copy, modify, merge, publish, *
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.\" distribute, distribute with modifications, sublicense, and/or sell *
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.\" copies of the Software, and to permit persons to whom the Software is *
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.\" furnished to do so, subject to the following conditions: *
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.\" *
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.\" The above copyright notice and this permission notice shall be included *
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.\" in all copies or substantial portions of the Software. *
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.\" *
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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.\" *
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.\" Except as contained in this notice, the name(s) of the above copyright *
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.\" holders shall not be used in advertising or otherwise to promote the *
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.\" sale, use or other dealings in this Software without prior written *
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.\" authorization. *
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.\"***************************************************************************
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.\"
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.\" $Id: panel.3x,v 1.39 2020/02/15 21:06:40 tom Exp $
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.TH panel 3X ""
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.ie \n(.g .ds `` \(lq
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.el .ds `` ``
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.ie \n(.g .ds '' \(rq
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.el .ds '' ''
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.de bP
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.ie n .IP \(bu 4
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.el .IP \(bu 2
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..
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.SH NAME
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panel \- panel stack extension for curses
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.SH SYNOPSIS
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\fB#include <panel.h>\fR
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.P
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\fBcc [flags] sourcefiles \-lpanel \-lncurses\fR
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.P
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\fBPANEL *new_panel(WINDOW *\fIwin\fB);\fR
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.sp
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\fBint bottom_panel(PANEL *\fIpan\fB);\fR
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.br
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\fBint top_panel(PANEL *\fIpan\fB);\fR
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.br
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\fBint show_panel(PANEL *\fIpan\fB);\fR
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.br
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\fBvoid update_panels(void);\fR
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.br
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\fBint hide_panel(PANEL *\fIpan\fB);\fR
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.sp
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\fBWINDOW *panel_window(const PANEL *\fIpan\fB);\fR
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.br
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\fBint replace_panel(PANEL *\fIpan\fB, WINDOW *\fIwindow\fB);\fR
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.br
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\fBint move_panel(PANEL *\fIpan\fB, int \fIstarty\fB, int \fIstartx\fB);\fR
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.br
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\fBint panel_hidden(const PANEL *\fIpan\fB);\fR
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.sp
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\fBPANEL *panel_above(const PANEL *\fIpan\fB);\fR
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.br
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\fBPANEL *panel_below(const PANEL *\fIpan\fB);\fR
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.sp
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\fBint set_panel_userptr(PANEL *\fIpan\fB, const void *\fIptr\fB);\fR
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.br
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\fBconst void *panel_userptr(const PANEL *\fIpan\fB);\fR
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.sp
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\fBint del_panel(PANEL *\fIpan\fB);\fR
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.sp
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/* ncurses-extensions */
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.br
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\fBPANEL *ground_panel(SCREEN *\fIsp\fB);\fR
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.br
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\fBPANEL *ceiling_panel(SCREEN *\fIsp\fB);\fR
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.br
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.SH DESCRIPTION
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Panels are \fBcurses\fR(3X) windows with the added feature of
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depth.
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Panel functions allow the use of stacked windows and ensure
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the proper portions of each window and the curses \fBstdscr\fR window are
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hidden or displayed when panels are added, moved, modified or removed.
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The set of currently visible panels is the stack of panels.
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The
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\fBstdscr\fR window is beneath all panels, and is not considered part
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of the stack.
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.P
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A window is associated with every panel.
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The panel routines enable
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you to create, move, hide, and show panels, as well as position a
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panel at any desired location in the stack.
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.P
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Panel routines are a functional layer added to \fBcurses\fR(3X), make only
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high-level curses calls, and work anywhere terminfo curses does.
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.SH FUNCTIONS
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.\" ---------
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.SS bottom_panel
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\fBbottom_panel(\fIpan\fB)\fR
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puts panel \fIpan\fP at the bottom of all panels.
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.\" ---------
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.SS ceiling_panel
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\fBceiling_panel(\fIsp\fB)\fR
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acts like \fBpanel_below(NULL)\fP, for the given \fBSCREEN\fP \fIsp\fP.
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.\" ---------
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.SS del_panel
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\fBdel_panel(\fIpan\fB)\fR
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removes the given panel \fIpan\fP from the stack and deallocates the
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\fBPANEL\fR structure (but not its associated window).
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.\" ---------
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.SS ground_panel
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\fBground_panel(\fIsp\fB)\fR
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acts like \fBpanel_above(NULL)\fP, for the given \fBSCREEN\fP \fIsp\fP.
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.\" ---------
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.SS hide_panel
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\fBhide_panel(\fIpan\fB)\fR
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removes the given panel \fIpan\fP from the panel stack
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and thus hides it from view.
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The \fBPANEL\fR structure is not lost, merely removed from the stack.
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.\" ---------
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.SS move_panel
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\fBmove_panel(\fIpan\fB,\fIstarty\fB,\fIstartx\fB)\fR
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moves the given panel \fIpan\fP's window so that its upper-left corner is at
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\fIstarty\fR, \fIstartx\fR.
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It does not change the position of the panel in the stack.
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Be sure to use this function, not \fBmvwin\fR(3X), to move a panel window.
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.\" ---------
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.SS new_panel
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\fBnew_panel(\fIwin\fB)\fR allocates a \fBPANEL\fR structure,
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associates it with \fIwin\fR, places the panel on the top of the stack
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(causes it to be displayed above any other panel) and returns a
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pointer to the new panel.
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.\" ---------
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.SS panel_above
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\fBpanel_above(\fIpan\fB)\fR
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returns a pointer to the panel above \fIpan\fP.
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If the panel argument is
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\fB(PANEL *)0\fR, it returns a pointer to the bottom panel in the stack.
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.\" ---------
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.SS panel_below
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\fBpanel_below(\fIpan\fB)\fR
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returns a pointer to the panel just below \fIpan\fP.
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If the panel argument
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is \fB(PANEL *)0\fR, it returns a pointer to the top panel in the stack.
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.\" ---------
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.SS panel_hidden
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\fBpanel_hidden(\fIpan\fB)\fR
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returns \fBTRUE\fP if the panel \fIpan\fP is in the panel stack,
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\fBFALSE\fP if it is not.
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If the panel is a null pointer, return \fBERR\fP.
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.\" ---------
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.SS panel_userptr
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\fBpanel_userptr(\fIpan\fB)\fR
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returns the user pointer for a given panel \fIpan\fP.
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.\" ---------
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.SS panel_window
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\fBpanel_window(\fIpan\fB)\fR
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returns a pointer to the window of the given panel \fIpan\fP.
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.\" ---------
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.SS replace_panel
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\fBreplace_panel(\fIpan\fB,\fIwindow\fB)\fR
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replaces the current window of panel \fIpan\fP with \fIwindow\fR
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This is useful, for example if you want to resize a panel.
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In \fBncurses\fR, you can call \fBreplace_panel\fR
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to resize a panel using a window resized with \fBwresize\fR(3X).
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It does not change the position of the panel in the stack.
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.\" ---------
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.SS set_panel_userptr
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\fBset_panel_userptr(\fIpan\fB,\fIptr\fB)\fR
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sets the panel's user pointer.
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.\" ---------
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.SS show_panel
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\fBshow_panel(\fIpan\fB)\fR
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makes a hidden panel visible by placing it on top of the panels in the
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panel stack.
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See \fBCOMPATIBILITY\fP below.
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.\" ---------
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.SS top_panel
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\fBtop_panel(\fIpan\fB)\fR
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puts the given visible panel \fIpan\fP on top of all panels in the stack.
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See \fBCOMPATIBILITY\fP below.
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.\" ---------
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.SS update_panels
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\fBupdate_panels()\fR
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refreshes the \fIvirtual screen\fP to reflect the relations between the
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panels in the stack, but does not call \fBdoupdate\fP(3X) to refresh the
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\fIphysical screen\fP.
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Use this function and not \fBwrefresh\fP(3X) or \fBwnoutrefresh\fP(3X).
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.PP
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\fBupdate_panels\fP may be called more than once before a call to
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\fBdoupdate\fP, but \fBdoupdate\fP is the function responsible for updating
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the \fIphysical screen\fP.
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.SH DIAGNOSTICS
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Each routine that returns a pointer returns \fBNULL\fR if an error
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occurs.
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Each routine that returns an int value returns \fBOK\fR if it
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executes successfully and \fBERR\fR if not.
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.PP
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Except as noted, the \fIpan\fP and \fIwindow\fP parameters must be non-null.
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If those are null, an error is returned.
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.PP
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The \fBmove_panel\fP function uses \fBmvwin\fP(3X),
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and will return an error if \fBmvwin\fP returns an error.
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.SH COMPATIBILITY
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Reasonable care has been taken to ensure compatibility
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with the native panel facility introduced in System V (inspection of
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the SVr4 manual pages suggests the programming interface is unchanged).
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The \fBPANEL\fR data structures are merely similar.
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The programmer
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is cautioned not to directly use \fBPANEL\fR fields.
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.P
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The functions \fBshow_panel\fR and \fBtop_panel\fR are identical
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in this implementation, and work equally well with displayed or hidden
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panels.
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In the native System V implementation, \fBshow_panel\fR is
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intended for making a hidden panel visible (at the top of the stack)
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and \fBtop_panel\fR is intended for making an already-visible panel
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move to the top of the stack.
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You are cautioned to use the correct
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function to ensure compatibility with native panel libraries.
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.SH NOTE
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In your library list, libpanel.a should be before libncurses.a; that is,
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you should say \*(``\-lpanel \-lncurses\*('', not the other way around
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(which would give a link-error with static libraries).
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.SH PORTABILITY
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.PP
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The panel facility was documented in SVr4.2 in
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\fICharacter User Interface Programming (UNIX SVR4.2)\fP.
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.PP
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It is not part of X/Open Curses.
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.PP
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A few implementations exist:
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.bP
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Systems based on SVr4 source code,
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e.g., Solaris, provide this library.
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.bP
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\fBncurses\fP (since version 0.6 in 1993)
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and \fBPDCurses\fP (since version 2.2 in 1995)
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provide a panel library whose common ancestor
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was a public domain implementation by Warren Tucker
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published in \fIu386mon\fP 2.20 (1990).
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.IP
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According to Tucker, the SystemV panel library
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was first released in SVr3.2 (1988),
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and his implementation helped with a port to SVr3.1 (1987).
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.IP
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Several developers have improved each of these;
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they are no longer the same as Tucker's implementation.
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.bP
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NetBSD 8 (2018)
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has a panel library begun by Valery Ushakov in 2015.
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This is based on the AT&T documentation.
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.SH FILES
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.P
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panel.h
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interface for the panels library
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.P
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libpanel.a
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the panels library itself
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.SH SEE ALSO
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\fBcurses\fR(3X),
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\fBcurs_variables\fR(3X),
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.PP
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This describes \fBncurses\fR
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version @NCURSES_MAJOR@.@NCURSES_MINOR@ (patch @NCURSES_PATCH@).
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.SH AUTHOR
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.PP
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Originally written by Warren Tucker <wht@n4hgf.mt-park.ga.us>,
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primarily to assist in porting \fIu386mon\fP to systems without a native
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panels library.
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.PP
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Repackaged for ncurses by Zeyd ben-Halim.
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.PP
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Juergen Pfeifer and Thomas E. Dickey revised/improved the library.
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