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<HTML><HEAD><TITLE>Xlib Programming Manual: UnmapNotify Events</TITLE></HEAD><BODY><H1 ALIGN=center>10.10.9 UnmapNotify Events</H1><!.IN "Events" "UnmapNotify"><!.IN "UnmapNotify" "" "@DEF@">The X server can report<B>UnmapNotify</B>events to clients wanting information about which windows are unmapped.The X server generates this event type whenever a client application changes thewindow's state from mapped to unmapped.<P>To receive <B>UnmapNotify</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, unmapping any child window generates an event).<A NAME="XUnmapEvent"></A><P>The structure for this event type contains:<P><!.IN "XUnmapEvent" "" "@DEF@"><PRE><CODE>typedef struct { int type; /* UnmapNotify */ 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; Bool from_configure;} XUnmapEvent;</CODE></PRE><P>The <B>event</B> member is set either to the unmapped window or to its parent,depending on whether<B>StructureNotify</B>or<B>SubstructureNotify</B>was selected.This is the window used by the X server to report the event.The <B>window</B> member is set to the window that was unmapped.The <B>from_configure</B> member is set to<B>True</B> if the event was generated as a result of a resizing of the window's parent whenthe window itself had a win_gravity of<B>UnmapGravity</B>.<H5 ALIGN=right><I>Next: <A HREF="visibility.html">VisibilityNotify 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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