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<HTML><HEAD><TITLE>Xlib Programming Manual: XParseGeometry</TITLE></HEAD><BODY><H1 ALIGN=center>XParseGeometry</H1><H2>Syntax</H2><CODE><PRE>int XParseGeometry(<B>parsestring</B>, <B>x_return</B>, <B>y_return</B>, <B>width_return</B>, <B>height_return</B>) char *<B>parsestring</B>; int *<B>x_return</B>, *<B>y_return</B>; unsigned int *<B>width_return</B>, *<B>height_return</B>;</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>parsestring</B><TD> Specifies the string you want to parse.<TR><TD> <B>x_return</B><BR> <B>y_return</B><TD> Return the x and y offsets.<TR><TD> <B>width_return</B><BR> <B>height_return</B><TD> Return the width and height determined.</TABLE><H2>Description</H2>By convention,X applications use a standard string to indicate window size and placement.<B>XParseGeometry()</B>makes it easier to conform to this standard because it allows youto parse the standard window geometry.Specifically, this function lets you parse strings of the form:<P><BLOCKQUOTE><I>[=][<<B>width</B>>{xX}<<B>height</B>>][{+-}<<B>xoffset</B>>{+-}<<B>yoffset</B>>] </I></BLOCKQUOTE><P>The fields map into the arguments associated with this function.(Items enclosed in <> are integers, items in [] are optional, anditems enclosed in {} indicate ``choose one of.''Note that the brackets should not appear in the actual string.)If the string is not in the Host Portable Character Encoding,the result is implementation dependent.<P>The<B>XParseGeometry()</B>function returns a bitmask that indicates which of the four values (width,height, xoffset, and yoffset) were actually found in the string and whether the x and y values are negative. By convention, -0 is not equal to +0, because the user needs tobe able to say ``position the window relative to the right or bottom edge.''For each value found, the corresponding argument is updated.For each value not found, the argument is left unchanged.The bits are represented by<B>XValue</B>, <B>YValue</B>, <B>WidthValue</B>, <B>HeightValue</B>,<B>XNegative</B>, or<B>YNegative</B>and are defined in <B><TT>X11/Xutil.h.</TT></B>They will be set whenever one of the values is defined or one of the signs is set.<P>If the function returns either the <B>XValue</B> or <B>YValue</B> flag,you should place the window at the requested position.<H2>See also</H2><B><A HREF="XWMGeometry.html">XWMGeometry()</A></B>,<B><A HREF="../ICC/client-to-window-manager/XSetWMProperties.html">XSetWMProperties()</A></B>,"<A HREF="parsing-window-geometry.html">Parsing the Window Geometry</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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