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<H1 class="no-header">curs_opaque 3x 2024-03-16 ncurses 6.5 Library calls</H1>
<PRE>
<STRONG><A HREF="curs_opaque.3x.html">curs_opaque(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_opaque.3x.html">curs_opaque(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>is_cleared</STRONG>, <STRONG>is_idlok</STRONG>, <STRONG>is_idcok</STRONG>, <STRONG>is_immedok</STRONG>, <STRONG>is_keypad</STRONG>, <STRONG>is_leaveok</STRONG>,
<STRONG>is_nodelay</STRONG>, <STRONG>is_notimeout</STRONG>, <STRONG>is_pad</STRONG>, <STRONG>is_scrollok</STRONG>, <STRONG>is_subwin</STRONG>, <STRONG>is_syncok</STRONG>,
<STRONG>wgetdelay</STRONG>, <STRONG>wgetparent</STRONG>, <STRONG>wgetscrreg</STRONG> - obtain <EM>curses</EM> window properties
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>bool</STRONG> <STRONG>is_cleared(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_idcok(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_idlok(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_immedok(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_keypad(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_leaveok(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_nodelay(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_notimeout(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_pad(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_scrollok(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_subwin(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>bool</STRONG> <STRONG>is_syncok(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>WINDOW</STRONG> <STRONG>*</STRONG> <STRONG>wgetparent(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>wgetdelay(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>wgetscrreg(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>*</STRONG><EM>top</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>*</STRONG><EM>bottom</EM><STRONG>);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
<EM>ncurses</EM> provides functions returning properties of a <EM>WINDOW</EM> structure,
allowing it to be "opaque" if the application defines the
<STRONG>NCURSES_OPAQUE</STRONG> preprocessor symbol. <EM>Opacity</EM> in this sense means that
the members of <EM>struct</EM> data types are not directly accessible (for
instance, through "." or "->" operators), but instead must be queried
and/or set via library functions. Advantages of opacity include
greater abstraction and improved management of concurrent accesses to
data structures, keeping object states coherent.
<STRONG>is_cleared</STRONG>
returns the value set by <STRONG><A HREF="curs_outopts.3x.html">clearok(3x)</A></STRONG>.
<STRONG>is_idcok</STRONG>
returns the value set by <STRONG><A HREF="idcok.3x.html">idcok(3x)</A></STRONG>.
<STRONG>is_idlok</STRONG>
returns the value set by <STRONG><A HREF="idlok.3x.html">idlok(3x)</A></STRONG>.
<STRONG>is_immedok</STRONG>
returns the value set by <STRONG><A HREF="curs_outopts.3x.html">immedok(3x)</A></STRONG>.
<STRONG>is_keypad</STRONG>
returns the value set by <STRONG><A HREF="curs_inopts.3x.html">keypad(3x)</A></STRONG>.
<STRONG>is_leaveok</STRONG>
returns the value set by <STRONG><A HREF="leaveok.3x.html">leaveok(3x)</A></STRONG>.
<STRONG>is_nodelay</STRONG>
returns the value set by <STRONG><A HREF="nodelay.3x.html">nodelay(3x)</A></STRONG>.
<STRONG>is_notimeout</STRONG>
returns the value set by <STRONG><A HREF="notimeout.3x.html">notimeout(3x)</A></STRONG>.
<STRONG>is_pad</STRONG> returns <STRONG>TRUE</STRONG> if the window is a pad; that is, it was created by
<STRONG><A HREF="newpad.3x.html">newpad(3x)</A></STRONG>.
<STRONG>is_scrollok</STRONG>
returns the value set by <STRONG><A HREF="scrollok.3x.html">scrollok(3x)</A></STRONG>.
<STRONG>is_subwin</STRONG>
returns <STRONG>TRUE</STRONG> if the window is a subwindow, that is, it was
created by <STRONG><A HREF="subwin.3x.html">subwin(3x)</A></STRONG> or <STRONG><A HREF="derwin.3x.html">derwin(3x)</A></STRONG>.
<STRONG>is_syncok</STRONG>
returns the value set by <STRONG><A HREF="syncok.3x.html">syncok(3x)</A></STRONG>.
<STRONG>wgetdelay</STRONG>
returns the delay timeout set by <STRONG><A HREF="wtimeout.3x.html">wtimeout(3x)</A></STRONG>.
<STRONG>wgetparent</STRONG>
returns the parent <EM>WINDOW</EM> pointer for subwindows, or <STRONG>NULL</STRONG> for
windows having no parent.
<STRONG>wgetscrreg</STRONG>
stores the the top and bottom rows for the scrolling margin set
by <STRONG><A HREF="curs_outopts.3x.html">wsetscrreg(3x)</A></STRONG> in the corresponding arguments, returning <STRONG>ERR</STRONG>
upon failure and <STRONG>OK</STRONG> upon successful completion.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
These functions return <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG> except as noted.
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
<EM>ncurses</EM> provides both a C function and a preprocessor macro for each
function documented in this page.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
These routines are specific to <EM>ncurses</EM>. They were not supported on
Version 7, BSD or System V implementations. It is recommended that any
code depending on <EM>ncurses</EM> extensions be conditioned using
<STRONG>NCURSES_VERSION</STRONG>.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_inopts.3x.html">curs_inopts(3x)</A></STRONG>, <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>, <STRONG><A HREF="curs_threads.3x.html">curs_threads(3x)</A></STRONG>,
<STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG>
ncurses 6.5 2024-03-16 <STRONG><A HREF="curs_opaque.3x.html">curs_opaque(3x)</A></STRONG>
</PRE>
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<ul>
<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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