203 lines
4.9 KiB
Groff
203 lines
4.9 KiB
Groff
.\" $NetBSD: curses_cursor.3,v 1.4 2004/03/16 19:23:06 snj Exp $
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.\"
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.\" Copyright (c) 2002
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.\" Brett Lymn (blymn@NetBSD.org, brett_lymn@yahoo.com.au)
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.\"
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.\" This code is donated to the NetBSD Foundation by the Author.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the Author may not be used to endorse or promote
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.\" products derived from this software without specific prior written
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.\" permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\"
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.Dd August 12, 2002
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.Dt CURSES 3
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.Os
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.Sh NAME
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.Nm curses_cursor ,
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.Nm getcury ,
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.Nm getcurx ,
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.Nm getyx ,
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.Nm getbegy ,
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.Nm getbegx ,
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.Nm getbegyx ,
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.Nm getmaxy ,
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.Nm getmaxx ,
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.Nm getmaxyx ,
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.Nm getpary ,
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.Nm getparx ,
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.Nm getparyx ,
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.Nm move ,
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.Nm wmove ,
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.Nm mvcur
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.Nd curses cursor and window location and positioning routines
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.Sh LIBRARY
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.Lb libcurses
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.Sh SYNOPSIS
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.In curses.h
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.Ft int
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.Fn getcury "WINDOW *win"
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.Ft int
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.Fn getcurx "WINDOW *win"
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.Ft void
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.Fn getyx "WINDOW *win" "int y" "int x"
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.Ft int
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.Fn getbegy "WINDOW *win"
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.Ft int
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.Fn getbegx "WINDOW *win"
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.Ft void
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.Fn getbegyx "WINDOW *win" "int y" "int x"
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.Ft int
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.Fn getmaxy "WINDOW *win"
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.Ft int
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.Fn getmaxx "WINDOW *win"
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.Ft void
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.Fn getmaxyx "WINDOW *win" "int y" "int x"
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.Ft int
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.Fn getpary "WINDOW *win"
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.Ft int
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.Fn getparx "WINDOW *win"
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.Ft void
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.Fn getparyx "WINDOW *win" "int y" "int x"
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.Ft int
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.Fn move "int y" "int x"
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.Ft int
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.Fn wmove "WINDOW *win" "int y" "int x"
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.Ft int
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.Fn mvcur "int oldy" "int oldx" "int y" "int x"
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.Sh DESCRIPTION
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These functions and macros locate and position cursors and windows.
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.Pp
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The
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.Fn getcury
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and
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.Fn getcurx
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functions get the current row and column positions, respectively, of the cursor in
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the window
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.Fa win .
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The
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.Fn getyx
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macro sets the values of
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.Fa y
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and
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.Fa x
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to the current row and column positions of the cursor in the window
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.Fa win .
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.Pp
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The origin row and columns of a window
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.Fa win
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can be
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determined by calling the
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.Fn getbegy
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and
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.Fn getbegx
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functions, respectively, and the maximum row and column for the window can be
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found by calling the functions
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.Fn getmaxy
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and
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.Fn getmaxx ,
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respectively.
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The
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.Fn getbegyx
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and
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.Fn getmaxyx
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macros set the values of
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.Fa y
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and
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.Fa x
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to the origin and maximum row and column positions, respectively, for the window
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.Fa win .
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.Pp
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The
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.Fn getpary
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and
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.Fn getparx
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functions return the row and column position of the given subwindow relative to
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the window's parent.
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The macro
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.Fn getparyx
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sets the values of
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.Fa y
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and
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.Fa x
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to the origin of the subwindow relative to the window's parent.
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.Pp
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The
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.Fn move
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function positions the cursor on the current window at the position given by
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.Fa y ,
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.Fa x .
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The cursor position is not changed on the screen until the next
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.Fn refresh .
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.Pp
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The
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.Fn wmove
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function is the same as the
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.Fn move
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function, excepting that the cursor is moved in the window specified by
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.Fa win .
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.Pp
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The function
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.Fn mvcur
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moves the cursor to
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.Fa y ,
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.Fa x
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on the screen.
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The arguments
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.Fa oldy ,
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.Fa oldx
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define the previous cursor position for terminals that do not support
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absolute cursor motions.
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The curses library may optimise the cursor motion based on these values.
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If the
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.Fn mvcur
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succeeds then the curses internal structures are updated with the new
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position of the cursor.
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If the destination arguments for
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.Fn mvcur
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exceed the terminal bounds an error will be returned and the cursor
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position will be unchanged.
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.Sh RETURN VALUES
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Functions returning pointers will return
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.Dv NULL
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if an error is detected.
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The functions that return an int will return one of the following
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values:
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.Pp
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.Bl -tag -width ERR -compact
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.It Er OK
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The function completed successfully.
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.It Er ERR
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An error occurred in the function.
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.El
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.Sh SEE ALSO
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.Xr curses_refresh 3
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.Sh STANDARDS
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The
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.Nx
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Curses library complies with the X/Open Curses specification, part of
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the Single Unix Specification.
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.Sh HISTORY
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The Curses package appeared in
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.Bx 4.0 .
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