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<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
</PRE>
<H2>NAME</H2><PRE>
<B>newwin</B>, <B>delwin</B>, <B>mvwin</B>, <B>subwin</B>, <B>derwin</B>, <B>mvderwin</B>, <B>dupwin</B>,
<B>wsyncup</B>, <B>syncok</B>, <B>wcursyncup</B>, <B>wsyncdown</B> - create <B>curses</B>
windows
</PRE>
<H2>SYNOPSIS</H2><PRE>
<B>#include</B> <B><curses.h></B>
<B>WINDOW</B> <B>*newwin(int</B> <B>nlines,</B> <B>int</B> <B>ncols,</B> <B>int</B> <B>begin_y,</B>
<B>int</B> <B>begin_x);</B>
<B>int</B> <B>delwin(WINDOW</B> <B>*win);</B>
<B>int</B> <B>mvwin(WINDOW</B> <B>*win,</B> <B>int</B> <B>y,</B> <B>int</B> <B>x);</B>
<B>WINDOW</B> <B>*subwin(WINDOW</B> <B>*orig,</B> <B>int</B> <B>nlines,</B> <B>int</B> <B>ncols,</B>
<B>int</B> <B>begin_y,</B> <B>int</B> <B>begin_x);</B>
<B>WINDOW</B> <B>*derwin(WINDOW</B> <B>*orig,</B> <B>int</B> <B>nlines,</B> <B>int</B> <B>ncols,</B>
<B>int</B> <B>begin_y,</B> <B>int</B> <B>begin_x);</B>
<B>int</B> <B>mvderwin(WINDOW</B> <B>*win,</B> <B>int</B> <B>par_y,</B> <B>int</B> <B>par_x);</B>
<B>WINDOW</B> <B>*dupwin(WINDOW</B> <B>*win);</B>
<B>void</B> <B>wsyncup(WINDOW</B> <B>*win);</B>
<B>int</B> <B>syncok(WINDOW</B> <B>*win,</B> <B>bool</B> <B>bf);</B>
<B>void</B> <B>wcursyncup(WINDOW</B> <B>*win);</B>
<B>void</B> <B>wsyncdown(WINDOW</B> <B>*win);</B>
</PRE>
<H2>DESCRIPTION</H2><PRE>
Calling <B>newwin</B> creates and returns a pointer to a new win-
dow with the given number of lines and columns. The upper
left-hand corner of the window is at line <I>begin</I>_<I>y</I>, column
<I>begin</I>_<I>x</I>. If either <I>nlines</I> or <I>ncols</I> is zero, they default
to <B>LINES</B> <B>-</B> <I>begin</I>_<I>y</I> and <B>COLS</B> <B>-</B> <I>begin</I>_<I>x</I>. A new full-screen
window is created by calling <B>newwin(0,0,0,0)</B>.
Calling <B>delwin</B> deletes the named window, freeing all mem-
ory 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 <B>mvwin</B> moves the window so that the upper left-hand
corner is at position (<I>x</I>, <I>y</I>). 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 <B>subwin</B> creates and returns a pointer to a new win-
dow with the given number of lines, <I>nlines</I>, and columns,
<I>ncols</I>. The window is at position (<I>begin</I>_<I>y</I>, <I>begin</I>_<I>x</I>) on
the screen. (This position is relative to the screen, and
not to the window <I>orig</I>.) The window is made in the middle
of the window <I>orig</I>, so that changes made to one window
will affect both windows. The subwindow shares memory
with the window <I>orig</I>. When using this routine, it is nec-
essary to call <B>touchwin</B> or <B>touchline</B> on <I>orig</I> before call-
ing <B>wrefresh</B> on the subwindow.
Calling <B>derwin</B> is the same as calling <B>subwin,</B> except that
<I>begin</I>_<I>y</I> and <I>begin</I>_<I>x</I> are relative to the origin of the win-
dow <I>orig</I> rather than the screen. There is no difference
between the subwindows and the derived windows.
Calling <B>mvderwin</B> 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 <B>dupwin</B> creates an exact duplicate of the window
<I>win</I>.
Calling <B>wsyncup</B> touches all locations in ancestors of <I>win</I>
that are changed in <I>win</I>. If <B>syncok</B> is called with second
argument <B>TRUE</B> then <B>wsyncup</B> is called automatically when-
ever there is a change in the window.
The <B>wsyncdown</B> routine touches each location in <I>win</I> that
has been touched in any of its ancestor windows. This
routine is called by <B>wrefresh</B>, so it should almost never
be necessary to call it manually.
The routine <B>wcursyncup</B> updates the current cursor position
of all the ancestors of the window to reflect the current
cursor position of the window.
</PRE>
<H2>RETURN VALUE</H2><PRE>
Routines that return an integer return the integer <B>ERR</B>
upon failure and <B>OK</B> (SVr4 only specifies "an integer value
other than <B>ERR</B>") upon successful completion.
<B>delwin</B> returns the integer <B>ERR</B> upon failure and <B>OK</B> upon
successful completion.
Routines that return pointers return <B>NULL</B> on error.
</PRE>
<H2>NOTES</H2><PRE>
If many small changes are made to the window, the <B>wsyncup</B>
option could degrade performance.
Note that <B>syncok</B> may be a macro.
</PRE>
<H2>BUGS</H2><PRE>
The subwindow functions (<I>subwin</I>, <I>derwin</I>, <I>mvderwin</I>, <B>wsyn-</B>
<B>cup</B>, <B>wsyncdown</B>, <B>wcursyncup</B>, <B>syncok</B>) are flaky, incom-
pletely implemented, and not well tested.
The System V curses documentation is very unclear about
what <B>wsyncup</B> and <B>wsyncdown</B> 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 <B>curses</B> implementation, is pat-
terned on the XPG4 curses standard. The weaker XPG4 spec
may result in slower updates.
</PRE>
<H2>PORTABILITY</H2><PRE>
The XSI Curses standard, Issue 4 describes these func-
tions.
</PRE>
<H2>SEE ALSO</H2><PRE>
<B><A HREF="ncurses.3x.html">curses(3x)</A></B>, <B><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></B>, <B><A HREF="curs_touch.3x.html">curs_touch(3x)</A></B>
</PRE>
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