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<HTML><HEAD><TITLE>Xlib Programming Manual: Mapping Windows</TITLE></HEAD><BODY><H1 ALIGN=center>3.5 Mapping Windows</H1>A window is considered mapped if an <B><A HREF="XMapWindow.html">XMapWindow()</A></B>call has been made on it.It may not be visible on the screen for one of the following reasons:<UL><P><LI>It is obscured by another opaque window.<P><LI>One of its ancestors is not mapped.<P><LI>It is entirely clipped by an ancestor.</UL><B><A HREF="../events/exposure/expose.html">Expose</A></B> events are generated for the window when part or all ofit becomes visible on the screen. A client receives the<B><A HREF="../events/exposure/expose.html">Expose</A></B> events only if it has asked for them.Windows retain their position in the stacking order when they are unmapped.<P>A window manager may want to control the placement of subwindows.If <B><A HREF="../events/processing-overview.html#SubstructureRedirectMask">SubstructureRedirectMask</A></B> has been selected by a window manageron a parent window (usually a root window),a map request initiated by other clients on a child window is not performed,and the window manager is sent a <B>MapRequest</B>event.However, if the override-redirect flag on the child had been set to<B>True</B>(usually only on pop-up menus),the map request is performed.<P>A tiling window manager might decide to reposition and resize other clients' windows and then decide to map the window to its final location.A window manager that wants to provide decoration mightreparent the child into a frame first.For further information,see "<A HREF="attributes/override-redirect.html">Override Redirect Flag</A>" and "<A HREF="../events/window-state-change/">Window State Change Events</A>".Only a single client at a time can select for <B><A HREF="../events/processing-overview.html#SubstructureRedirectMask">SubstructureRedirectMask</A></B>.<P>Similarly, a single client can select for <B><A HREF="../events/processing-overview.html#ResizeRedirectMask">ResizeRedirectMask</A></B> on a parent window.Then, any attempt to resize the window by another client is suppressed, andthe client receives a <B><A HREF="../events/structure-control/resize.html">ResizeRequest</A></B> event.<P>To map a given window, use <B><A HREF="XMapWindow.html">XMapWindow()</A></B>.<P>To map and raise a window, use<B><A HREF="XMapRaised.html">XMapRaised()</A></B>.<P>To map all subwindows for a specified window, use <B><A HREF="XMapSubwindows.html">XMapSubwindows()</A></B>.<H5 ALIGN=right><I>Next: <A HREF="unmap.html">Unmapping Windows</A></I></H5><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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