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<HTML><HEAD><TITLE>Xlib Programming Manual: CirculateNotify Events</TITLE></HEAD><BODY><H1 ALIGN=center>10.10.1 CirculateNotify Events</H1><!.IN "Events" "CirculateNotify"><!.IN "CirculateNotify" "" "@DEF@">The X server can report<B>CirculateNotify</B>events to clients wanting information about when a window changes its position in the stack.The X server generates this event type whenever a window is actually restacked as a result of a client application calling<B><A HREF="../../window/XCirculateSubwindows.html">XCirculateSubwindows()</A></B>,<B><A HREF="../../window/XCirculateSubwindowsUp.html">XCirculateSubwindowsUp()</A></B>,or<B><A HREF="../../window/XCirculateSubwindowsDown.html">XCirculateSubwindowsDown()</A></B>.<P>To receive <B>CirculateNotify</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 windowor 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, circulating any child generates an event).<A NAME="XCirculateEvent"></A><P>The structure for this event type contains:<P><!.IN "XCirculateEvent" "" "@DEF@"><CODE><PRE>typedef struct { int type; /* CirculateNotify */ 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; int place; /* PlaceOnTop, PlaceOnBottom */} XCirculateEvent;</PRE></CODE><P>The <B>event</B> member is set either to the restacked 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 was restacked.The <B>place</B> member is set to the window's position after the restack occurs andis either<B>PlaceOnTop</B>or<B>PlaceOnBottom</B>.If it is<B>PlaceOnTop</B>,the window is now on top of all siblings.If it is<B>PlaceOnBottom</B>,the window is now below all siblings.<H5 ALIGN=right><I>Next: <A HREF="configure.html">ConfigureNotify 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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