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curs_window(3curses)
curs_window(3CURSES) Curses Library Functions curs_window(3CURSES)
NAME
curs_window, newwin, delwin, mvwin, subwin, derwin, mvderwin, dupwin,
wsyncup, syncok, wcursyncup, wsyncdown - create curses windows
SYNOPSIS
cc [ flag ... ] file ... -lcurses [ library ... ]
#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
The newwin() routine creates and returns a pointer to a new window with
the given number of lines, nlines, and columns, ncols. 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 — be‐
gin_x. A new full-screen window is created by calling newwin(0,0,0,0).
The delwin() routine deletes the named window, freeing all memory asso‐
ciated with it. Subwindows must be deleted before the main window can
be deleted.
The mvwin() routine 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.
The subwin() routine 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 af‐
fect both windows. The subwindow shares memory with the window orig.
When using this routine, it is necessary to call touchwin() or touch‐
line() on orig before calling wrefresh() on the subwindow.
The derwin() routine is the same as 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.
The mvderwin() routine 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.
The dupwin() routine creates an exact duplicate of the window win.
Each curses window maintains two data structures: the character image
structure and the status structure. The character image structure is
shared among all windows in the window hierarchy (that is, the window
with all subwindows). The status structure, which contains information
about individual line changes in the window, is private to each window.
The routine wrefresh() uses the status data structure when performing
screen updating. Since status structures are not shared, changes made
to one window in the hierarchy may not be properly reflected on the
screen.
The routine wsyncup() causes the changes in the status structure of a
window to be reflected in the status structures of its ancestors. If
syncok() is called with second argument TRUE then wsyncup() is called
automatically whenever there is a change in the window.
The routine wcursyncup() updates the current cursor position of all the
ancestors of the window to reflect the current cursor position of the
window.
The routine wsyncdown() updates the status structure of the window to
reflect the changes in the status structures of its ancestors. Applica‐
tions seldom call this routine because it is called automatically by
wrefresh().
RETURN VALUES
Routines that return an integer return the integer ERR upon failure and
an integer value other than ERR upon successful completion.
delwin() returns the integer ERR upon failure and OK upon successful
completion.
Routines that return pointers return NULL on error.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ MT-LevelUnsafe
SEE ALSO
curs_touch(3CURSES), curs_refresh(3CURSES), curses(3CURSES), attrib‐
utes(7)
NOTES
The header <curses.h> automatically includes the headers <stdio.h> and
<unctrl.h>.
If many small changes are made to the window, the wsyncup() option
could degrade performance.
Note that syncok() may be a macro.
Oracle Solaris 11.4 31 Dec 1996 curs_window(3CURSES)