*************************************************************************** Copyright (c) 1998-2003,2005 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 * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, distribute with modifications, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name(s) of the above copyright * holders shall not be used in advertising or otherwise to promote the * sale, use or other dealings in this Software without prior written * authorization. **************************************************************************** $Id: curs_window.3x,v 1.13 2005/05/15 16:32:02 tom Exp $ curs_window 3X ""
NAME
newwin,
delwin,
mvwin,
subwin,
derwin,
mvderwin,
dupwin,
wsyncup,
syncok,
wcursyncup,
wsyncdown - create
curses windows
SYNOPSIS
#include <curses.h>
WINDOW *newwin(int nlines, int ncols, int begin_y,
int begin_x);
int delwin(WINDOW *win);
int mvwin(WINDOW *win, int y, int x);
WINDOW *subwin(WINDOW *orig, int nlines, int ncols,
int begin_y, int begin_x);
WINDOW *derwin(WINDOW *orig, int nlines, int ncols,
int begin_y, int begin_x);
int mvderwin(WINDOW *win, int par_y, int par_x);
WINDOW *dupwin(WINDOW *win);
void wsyncup(WINDOW *win);
int syncok(WINDOW *win, bool bf);
void wcursyncup(WINDOW *win);
void wsyncdown(WINDOW *win);
DESCRIPTION
Calling
newwin creates and returns a pointer to a new window with the
given number of lines and columns. The upper left-hand corner of the window is
at line
begin_
y, column
begin_
x. If either
nlines or
ncols is zero, they default to
LINES -
begin_
y and
COLS - begin_
x. A new full-screen
window is created by calling
newwin(0,0,0,0).
Calling
delwin deletes the named window, freeing all memory
associated with it (it does not actually erase the window's screen
image). Subwindows must be deleted before the main window can be
deleted.
Calling
mvwin moves the window so that the upper left-hand
corner is at position (
x,
y). If the move would cause the
window to be off the screen, it is an error and the window is not
moved. Moving subwindows is allowed, but should be avoided.
Calling
subwin creates and returns a pointer to a new window
with the given number of lines,
nlines, and columns,
ncols. The window is at position (
begin_
y,
begin_
x) on the screen. (This position is relative to the
screen, and not to the window
orig.) The window is made in the
middle of the window
orig, so that changes made to one window
will affect both windows. The subwindow shares memory with the window
orig. When using this routine, it is necessary to call
touchwin or
touchline on
orig before calling
wrefresh on the subwindow.
Calling
derwin is the same as calling
subwin, except that
begin_
y and
begin_
x are relative to the origin
of the window
orig rather than the screen. There is no
difference between the subwindows and the derived windows.
Calling
mvderwin moves a derived window (or subwindow)
inside its parent window. The screen-relative parameters of the
window are not changed. This routine is used to display different
parts of the parent window at the same physical position on the
screen.
Calling
dupwin creates an exact duplicate of the window
win.
Calling
wsyncup touches all locations in ancestors of
win that are
changed in
win. If
syncok is called with second argument
TRUE then
wsyncup is called automatically whenever there is a
change in the window.
The
wsyncdown routine touches each location in
win that has been
touched in any of its ancestor windows. This routine is called by
wrefresh, so it should almost never be necessary to call it manually.
The routine
wcursyncup updates the current cursor position of all the
ancestors of the window to reflect the current cursor position of the
window.
RETURN VALUE
Routines that return an integer return the integer
ERR upon failure and
OK (SVr4 only specifies "an integer value other than
ERR") upon
successful completion.
Routines that return pointers return NULL on error.
X/Open defines no error conditions.
In this implementation
5
delwin
returns an error if the window pointer is null, or
if the window is the parent of another window.
This implementation also maintains a list of windows,
and checks that the pointer passed to
delwin is one that
it created, returning an error if it was not..
5
mvderwin
returns an error
if the window pointer is null, or
if some part of the window would be placed off-screen.
5
mvwin
returns an error
if the window pointer is null, or
if the window is really a pad, or
if some part of the window would be placed off-screen.
5
syncok
returns an error
if the window pointer is null.
NOTES
If many small changes are made to the window, the
wsyncup option could
degrade performance.
Note that
syncok may be a macro.
BUGS
The subwindow functions (
subwin,
derwin,
mvderwin,
wsyncup,
wsyncdown,
wcursyncup,
syncok) are flaky,
incompletely implemented, and not well tested.
The System V curses documentation is very unclear about what
wsyncup
and
wsyncdown actually do. It seems to imply that they are only
supposed to touch exactly those lines that are affected by ancestor changes.
The language here, and the behavior of the
curses implementation,
is patterned on the XPG4 curses standard. The weaker XPG4 spec may result
in slower updates.
PORTABILITY
The XSI Curses standard, Issue 4 describes these functions.
SEE ALSO
curses(3X),
curs_refresh(3X),
curs_touch(3X)
## The following sets edit modes for GNU EMACS# Local Variables:# mode:nroff# fill-column:79# End: