229 lines
5.9 KiB
Groff
229 lines
5.9 KiB
Groff
.\" $NetBSD: curses_window.3,v 1.3 2002/12/23 12:16:10 jdc 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 December 4, 2002
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.Dt CURSES_WINDOW 3
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.Os
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.Sh NAME
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.Nm curses_window ,
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.Nm copywin ,
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.Nm dupwin ,
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.Nm delwin ,
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.Nm derwin ,
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.Nm mvderwin ,
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.Nm newwin ,
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.Nm overlay ,
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.Nm overwrite ,
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.Nm subwin ,
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.Nm wresize
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.Nd curses window routines
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.Sh LIBRARY
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.Lb libcurses
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.Sh SYNOPSIS
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.Fd #include \*[Lt]curses.h\*[Gt]
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.Ft int
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.Fo copywin
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.Fa "WINDOW *source"
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.Fa "WINDOW *dest"
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.Fa "int sminrow"
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.Fa "int smincol"
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.Fa "int dminrow"
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.Fa "int dmincol"
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.Fa "int dmaxrow"
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.Fa "int dmaxcol"
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.Fa "int overlay"
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.Fc
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.Ft WINDOW *
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.Fn dupwin "WINDOW *win"
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.Ft WINDOW *
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.Fn derwin "WINDOW *win" "int lines" "int cols" "int y" "int x"
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.Ft int
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.Fn delwin "WINDOW *win"
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.Ft int
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.Fn mvderwin "WINDOW *win" "int y" "int x"
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.Ft WINDOW *
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.Fn newwin "int lines" "int cols" "int begin_y" "int begin_x"
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.Ft WINDOW *
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.Fn subwin "WINDOW *win" "int lines" "int cols" "int begin_y" "int begin_x"
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.Ft int
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.Fn overlay "WINDOW *source" "WINDOW *dest"
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.Ft int
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.Fn overwrite "WINDOW *source" "WINDOW *dest"
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.Ft int
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.Fn wresize "WINDOW *win" "int lines" "int cols"
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.Sh DESCRIPTION
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These functions create, modify and delete windows on the current screen.
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.Pp
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The contents of a window may be copied to another window by using the
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.Fn copywin
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function, a section of the destination window
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.Fa dest
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bounded by
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.Fa (dminrow ,
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.Fa dmincol )
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and
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.Fa (dmaxrow ,
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.Fa dmaxcol )
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will be overwritten with the contents of the window
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.Fa source
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starting at the coordinates
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.Fa (sminrow ,
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.Fa smincol ) .
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If the
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.Fa overlay
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flag is
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.Dv TRUE
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then only non-blank characters from
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.Fa source
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will be copied to
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.Fa dest ,
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if
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.Fa overlay
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is
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.Dv FALSE
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then all characters from
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.Fa source
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will be copied to
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.Fa dest .
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If the bounding rectangles of either the source or the destination
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windows lay outside the maximum size of the respective windows then
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the size of the window copied will be adjusted to be within the bounds
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of both the source and destination windows.
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.Pp
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The
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.Fn dupwin
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function creates an exact duplicate of
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.Fa win
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and returns a pointer to it.
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.Pp
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Calling
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.Fn derwin
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will create a subwindow of
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.Fa win
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in the same manner as
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.Fn subwin
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excepting that the starting column and row
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.Fa y ,
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.Fa x
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are relative to the parent window origin.
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.Pp
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A window may deleted and all resources freed by calling the
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.Fn delwin
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function with the pointer to the window to be deleted in
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.Fa win .
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.Pp
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A subwindow can be moved relative to the parent window by calling the
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.Fn mvderwin
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function, the
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.Fa y
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and
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.Fa x
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positions are relative to the origin of the parent window.
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If the given window in
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.Fa win
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is not a subwindow then an error will be returned.
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.Pp
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The
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.Fn newwin
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function creates a new window of size
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.Fa lines ,
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.Fa cols
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with an origin at
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.Fa begin_y ,
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.Fa begin_x .
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If
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.Fa lines
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is zero then the number of rows for the window defaults to
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.Dv LINES -
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.Fa begin_x .
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If
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.Fa cols
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is zero then the number of columns for the window defaults to
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.Dv COLS
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\-
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.Fa begin_y .
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.Pp
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.Fn subwin
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is similar to
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.Fn newwin
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excepting that the size of the subwindow is bounded by the parent
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window
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.Fa win .
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The subwindow shares internal data structures with the parent window
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and will be refreshed when the parent window is refreshed.
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.Pp
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The
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.Fn overlay
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function copies the contents of the source window
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.Fa source
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to the destination window
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.Fa dest ,
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only the characters that are not the background character in the
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source window are copied to the destination.
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The windows need not be the same size, only the overlapping portion of both
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windows will be copied.
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The
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.Fn overwrite
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function performs the same functions as
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.Fn overlay
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excepting that characters from the source window are copied to the
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destination without exception.
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.Pp
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.Fn wresize
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resizes the specified window to the new number of lines and columns
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given, all internal curses structures are resized.
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The application must redraw the window after it has been resized.
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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_pad 3 ,
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.Xr curses_screen 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 the
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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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