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<HTML><HEAD><TITLE>Xlib Programming Manual: XClearWindow</TITLE></HEAD><BODY><H1 ALIGN=center>XClearWindow</H1><H2>Syntax</H2><!.IN "Window" "clearing"><!.IN "Clearing" "windows"><!.IN "XClearWindow" "" "@DEF@"><CODE><PRE>XClearWindow(<B>display</B>, <B>w</B>) <A HREF="../display/opening.html#Display">Display</A> *<B>display</B>; Window <B>w</B>;</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>display</B><TD> Specifies the connection to the X server.<TR><TD> <B>w</B><TD> Specifies the window.</TABLE><H2>Description</H2>The<B>XClearWindow()</B>function clears the entire area in the specified window and isequivalent to<B><A HREF="XClearArea.html">XClearArea</A></B>(display, w, 0, 0, 0, 0, <B>False</B>).If the window has a defined background tile, the rectangle is tiled with aplane-mask of all ones and <B>GXcopy</B>function.If the window hasbackground <B>None</B>, the contents of the window are not changed. If you specify a window whose class is<B><A HREF="../window/create.html#InputClass">InputOnly</A></B> ,a<B>BadMatch</B>error results. <P><B>XClearWindow()</B>can generate<B>BadMatch</B>and<B>BadWindow</B> errors.<H2>Diagnostics</H2><TABLE><TR><TD><B>BadMatch</B><TD>An<B><A HREF="../window/create.html#InputClass">InputOnly</A></B>window is used as a Drawable.<TR><TD><B>BadMatch</B><TD>Some argument or pair of arguments has the correct type and range but fails to match in some other way required by the request. <TR><TD><B>BadWindow</B><TD>A value for a Window argument does not name a defined Window.</TABLE><H2>See also</H2><B><A HREF="XClearArea.html">XClearArea()</A></B>,<B><A HREF="XCopyArea.html">XCopyArea()</A></B>,"<A HREF="clearing-areas.html">Clearing Areas</A>".<HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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