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<HTML><HEAD><TITLE>Xlib Programming Manual: DestroyNotify Events</TITLE></HEAD><BODY><H1 ALIGN=center>10.10.4 DestroyNotify Events</H1><!.IN "Events" "DestroyNotify"><!.IN "DestroyNotify" "" "@DEF@">The X server can report<B>DestroyNotify</B>events to clients wanting information about which windows are destroyed.The X server generates this event whenever a client application destroys a window by calling<B><A HREF="../../window/XDestroyWindow.html">XDestroyWindow()</A></B>or<B><A HREF="../../window/XDestroySubWindows.html">XDestroySubwindows()</A></B>.<P>The ordering of the <B>DestroyNotify</B> events is such that for any given window, <B>DestroyNotify</B>is generated on all inferiors of the windowbefore being generated on the window itself. The X protocol does not constrain the ordering amongsiblings and across subhierarchies.<P>To receive <B>DestroyNotify</B>events, set the<B>StructureNotifyMask</B>bit in the <A HREF="../../window/attributes/event-and-do-not-propagate.html">event-mask</A> attribute of the window or the<B>SubstructureNotifyMask</B>bit in the <A HREF="../../window/attributes/event-and-do-not-propagate.html">event-mask</A> attribute of the parent window(in which case, destroying any child generates an event).<A NAME="XDestroyWindowEvent"></A><P>The structure for this event type contains:<P><!.IN "XDestroyWindowEvent" "" "@DEF@"><PRE><CODE>typedef struct { int type; /* DestroyNotify */ unsigned long serial; /* # of last request processed by server */ Bool send_event; /* true if this came from a <B><A HREF="../../appendix/a.html#SendEvent">SendEvent</A></B> request */ Display *display; /* Display the event was read from */ Window event; Window window;} XDestroyWindowEvent;</CODE></PRE><P>The <B>event</B> member is set either to the destroyed window or to its parent,depending on whether<B>StructureNotify</B>or <B>SubstructureNotify</B>was selected.The <B>window</B> member is set to the window that is destroyed.<H5 ALIGN=right><I>Next: <A HREF="gravity.html">GravityNotify Events</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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