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<HTML><HEAD><TITLE>Xlib Programming Manual: Event Processing Overview</TITLE></HEAD><BODY><H1 ALIGN=center>10.4 Event Processing Overview</H1>The event reported to a client application during event processingdepends on which event masks you provide as the <A HREF="../window/attributes/event-and-do-not-propagate.html">event-mask</A> attribute for a window.For some event masks, there is a one-to-one correspondence betweenthe event mask constant and the event type constant.For example, if you pass the event mask<B>ButtonPressMask</B>,the X server sends back only<B><A HREF="keyboard-pointer/keyboard-pointer.html">ButtonPress</A></B>events.<!.IN "CurrentTime">Most events contain a time member,which is the time at which an event occurred.<P>In other cases, one event mask constant can map to several event type constants.For example, if you pass the event mask<B>SubstructureNotifyMask</B>,the X server can send back<B><A HREF="window-state-change/circulate.html">CirculateNotify</A></B>,<B><A HREF="window-state-change/configure.html">ConfigureNotify</A></B>,<B><A HREF="window-state-change/create.html">CreateNotify</A></B>,<B><A HREF="window-state-change/destroy.html">DestroyNotify</A></B>,<B><A HREF="window-state-change/gravity.html">GravityNotify</A></B>,<B><A HREF="window-state-change/map.html">MapNotify</A></B>,<B><A HREF="window-state-change/reparent.html">ReparentNotify</A></B>,or<B><A HREF="window-state-change/unmap.html">UnmapNotify</A></B>events.<P>In another case, two event masks can map to one event type.For example, if you pass either<B>PointerMotionMask</B>or<B>ButtonMotionMask</B>,the X server sends backa<B><A HREF="keyboard-pointer/keyboard-pointer.html">MotionNotify</A></B>event.<P>The following table lists the event mask, its associated event type or types, and the structure name associated with the event type.Some of these structures actually are typedefs to a generic structurethat is shared between two event types.Note that N.A. appears in columns for which the information is not applicable.<P><TABLE><TR><TD COLSPAN=4><HR><TR><TD><B>Event Mask <TD><B>Event Type <TD><B>Structure <TD><B>Generic Structure<TR><TD COLSPAN=4><HR><TR><TD><A NAME="ButtonMotionMask">ButtonMotionMask</A> <TD><B><A HREF="keyboard-pointer/keyboard-pointer.html">MotionNotify</A></B> <TD>XPointerMovedEvent <TD><A HREF="keyboard-pointer/keyboard-pointer.html#XMotionEvent">XMotionEvent</A><TR><TD><A NAME="Button1MotionMask">Button1MotionMask</A> <TD COLSPAN=3><TR><TD><A NAME="Button2MotionMask">Button2MotionMask</A> <TD COLSPAN=3><TR><TD><A NAME="Button3MotionMask">Button3MotionMask</A> <TD COLSPAN=3><TR><TD><A NAME="Button4MotionMask">Button4MotionMask</A> <TD COLSPAN=3><TR><TD><A NAME="Button5MotionMask">Button5MotionMask</A> <TD COLSPAN=3><TR><TD COLSPAN=4><TR><TD><A NAME="ButtonPressMask">ButtonPressMask</A> <TD><B><A HREF="keyboard-pointer/keyboard-pointer.html">ButtonPress</A></B> <TD>XButtonPressedEvent <TD><A HREF="keyboard-pointer/keyboard-pointer.html#XButtonEvent">XButtonEvent</A><TR><TD COLSPAN=4><TR><TD><A NAME="ButtonReleaseMask">ButtonReleaseMask</A> <TD><B><A HREF="keyboard-pointer/keyboard-pointer.html">ButtonRelease</A></B> <TD>XButtonReleasedEvent <TD><A HREF="keyboard-pointer/keyboard-pointer.html#XButtonEvent">XButtonEvent</A><TR><TD COLSPAN=4><TR><TD><A NAME="ColormapChangeMask">ColormapChangeMask</A> <TD><B><A HREF="colormap-state.html">ColormapNotify</A></B> <TD><A HREF="colormap-state.html#XColormapEvent">XColormapEvent</A> <TD><TR><TD COLSPAN=4><TR><TD><A NAME="EnterWindowMask">EnterWindowMask</A> <TD><B><A HREF="window-entry-exit/">EnterNotify</A></B> <TD>XEnterWindowEvent <TD><A HREF="window-entry-exit/#XCrossingEvent">XCrossingEvent</A><TR><TD COLSPAN=4><TR><TD><A NAME="LeaveWindowMask">LeaveWindowMask</A> <TD><B><A HREF="window-entry-exit/">LeaveNotify</A></B> <TD>XLeaveWindowEvent <TD><A HREF="window-entry-exit/#XCrossingEvent">XCrossingEvent</A><TR><TD COLSPAN=4><TR><TD><A NAME="ExposureMask">ExposureMask</A> <TD><B><A HREF="exposure/expose.html">Expose</A></B> <TD><A HREF="exposure/expose.html#XExposeEvent">XExposeEvent</A> <TD><TR><TD><A HREF="../GC/manipulating.html#graphics-exposure">GCGraphicsExposures</A> in GC <TD><B><A HREF="exposure/graphics-expose-and-no-expose.html">GraphicsExpose</A></B> <TD><A HREF="exposure/graphics-expose-and-no-expose.html#XGraphicsExposeEvent">XGraphicsExposeEvent</A> <TD><TR><TD> <TD><B><A HREF="exposure/graphics-expose-and-no-expose.html">NoExpose</A></B> <TD><A HREF="exposure/graphics-expose-and-no-expose.html#XNoExposeEvent">XNoExposeEvent</A> <TD><TR><TD COLSPAN=4><TR><TD><A NAME="FocusChangeMask">FocusChangeMask</A> <TD><B><A HREF="input-focus/">FocusIn</A></B> <TD>XFocusInEvent <TD><A HREF="input-focus/#XFocusChangeEvent">XFocusChangeEvent</A><TR><TD> <TD><B><A HREF="input-focus/">FocusOut</A></B> <TD>XFocusOutEvent <TD><A HREF="input-focus/#XFocusChangeEvent">XFocusChangeEvent</A><TR><TD COLSPAN=4><TR><TD><A NAME="KeymapStateMask">KeymapStateMask</A> <TD><B><A HREF="key-map.html">KeymapNotify</A></B> <TD><A HREF="key-map.html#XKeymapEvent">XKeymapEvent</A> <TD><TR><TD COLSPAN=4><TR><TD><A NAME="KeyPressMask">KeyPressMask</A> <TD><B><A HREF="keyboard-pointer/keyboard-pointer.html">KeyPress</A></B> <TD>XKeyPressedEvent <TD><A HREF="keyboard-pointer/keyboard-pointer.html#XKeyEvent">XKeyEvent</A><TR><TD><A NAME="KeyReleaseMask">KeyReleaseMask</A> <TD><B><A HREF="keyboard-pointer/keyboard-pointer.html">KeyRelease</A></B> <TD>XKeyReleasedEvent <TD><A HREF="keyboard-pointer/keyboard-pointer.html#XKeyEvent">XKeyEvent</A><TR><TD COLSPAN=4><TR><TD><A NAME="OwnerGrabButtonMask">OwnerGrabButtonMask</A> <TD>N.A. <TD>N.A. <TD><TR><TD COLSPAN=4><TR><TD><A NAME="PointerMotionMask">PointerMotionMask</A> <TD><B><A HREF="keyboard-pointer/keyboard-pointer.html">MotionNotify</A></B> <TD>XPointerMovedEvent <TD><A HREF="keyboard-pointer/keyboard-pointer.html#XMotionEvent">XMotionEvent</A><TR><TD><A NAME="PointerMotionHintMask">PointerMotionHintMask</A> <TD>N.A. <TD>N.A. <TD><TR><TD COLSPAN=4><TR><TD><A NAME="PropertyChangeMask">PropertyChangeMask</A> <TD><B><A HREF="client-communication/property.html">PropertyNotify</A></B> <TD><A HREF="client-communication/property.html#XPropertyEvent">XPropertyEvent</A> <TD><TR><TD COLSPAN=4><TR><TD><A NAME="ResizeRedirectMask">ResizeRedirectMask</A> <TD><B><A HREF="structure-control/resize.html">ResizeRequest</A></B> <TD><A HREF="structure-control/resize.html#XResizeRequestEvent">XResizeRequestEvent</A> <TD><TR><TD COLSPAN=4><TR><TD><A NAME="StructureNotifyMask">StructureNotifyMask</A> <TD><B><A HREF="window-state-change/circulate.html">CirculateNotify</A></B> <TD><A HREF="window-state-change/circulate.html#XCirculateEvent">XCirculateEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/configure.html">ConfigureNotify</A></B> <TD><A HREF="window-state-change/configure.html#XConfigureEvent">XConfigureEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/destroy.html">DestroyNotify</A></B> <TD><A HREF="window-state-change/destroy.html#XDestroyWindowEvent">XDestroyWindowEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/gravity.html">GravityNotify</A></B> <TD><A HREF="window-state-change/gravity.html#XGravityEvent">XGravityEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/map.html">MapNotify</A></B> <TD><A HREF="window-state-change/map.html#XMapEvent">XMapEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/reparent.html">ReparentNotify</A></B> <TD><A HREF="window-state-change/reparent.html#XReparentEvent">XReparentEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/unmap.html">UnmapNotify</A></B> <TD><A HREF="window-state-change/unmap.html#XUnmapEvent">XUnmapEvent</A> <TD><TR><TD COLSPAN=4><TR><TD><A NAME="SubstructureNotifyMask">SubstructureNotifyMask</A> <TD><B><A HREF="window-state-change/circulate.html">CirculateNotify</A></B> <TD><A HREF="window-state-change/circulate.html#XCirculateEvent">XCirculateEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/configure.html">ConfigureNotify</A></B> <TD><A HREF="window-state-change/configure.html#XConfigureEvent">XConfigureEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/create.html">CreateNotify</A></B> <TD><A HREF="window-state-change/create.html#XCreateWindowEvent">XCreateWindowEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/destroy.html">DestroyNotify</A></B> <TD><A HREF="window-state-change/destroy.html#XDestroyWindowEvent">XDestroyWindowEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/gravity.html">GravityNotify</A></B> <TD><A HREF="window-state-change/gravity.html#XGravityEvent">XGravityEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/map.html">MapNotify</A></B> <TD><A HREF="window-state-change/map.html#XMapEvent">XMapEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/reparent.html">ReparentNotify</A></B> <TD><A HREF="window-state-change/reparent.html#XReparentEvent">XReparentEvent</A> <TD><TR><TD> <TD><B><A HREF="window-state-change/unmap.html">UnmapNotify</A></B> <TD><A HREF="window-state-change/unmap.html#XUnmapEvent">XUnmapEvent</A> <TD><TR><TD COLSPAN=4><TR><TD><A NAME="SubstructureRedirectMask">SubstructureRedirectMask</A> <TD><B><A HREF="structure-control/circulate.html">CirculateRequest</A></B> <TD><A HREF="structure-control/circulate.html#XCirculateRequestEvent">XCirculateRequestEvent</A> <TD><TR><TD> <TD><B><A HREF="structure-control/configure.html">ConfigureRequest</A></B> <TD><A HREF="structure-control/configure.html#XConfigureRequestEvent">XConfigureRequestEvent</A> <TD><TR><TD> <TD><B><A HREF="structure-control/map.html">MapRequest</A></B> <TD><A HREF="structure-control/map.html#XMapRequestEvent">XMapRequestEvent</A> <TD><TR><TD COLSPAN=4><TR><TD>N.A. <TD><B><A HREF="client-communication/client-message.html">ClientMessage</A></B> <TD><A HREF="client-communication/client-message.html#XClientMessageEvent">XClientMessageEvent</A> <TD><TR><TD COLSPAN=4><TR><TD>N.A. <TD><B><A HREF="window-state-change/mapping.html">MappingNotify</A></B> <TD><A HREF="window-state-change/mapping.html#XMappingEvent">XMappingEvent</A> <TD><TR><TD COLSPAN=4><TR><TD>N.A. <TD><B><A HREF="client-communication/selection-clear.html">SelectionClear</A></B> <TD><A HREF="client-communication/selection-clear.html#XSelectionClearEvent">XSelectionClearEvent</A> <TD><TR><TD COLSPAN=4><TR><TD>N.A. <TD><B><A HREF="client-communication/selection.html">SelectionNotify</A></B> <TD><A HREF="client-communication/selection.html#XSelectionEvent">XSelectionEvent</A> <TD><TR><TD COLSPAN=4><TR><TD>N.A. <TD><B><A HREF="client-communication/selection-request.html">SelectionRequest</A></B> <TD><A HREF="client-communication/selection-request.html#XSelectionRequestEvent">XSelectionRequestEvent</A> <TD><TR><TD COLSPAN=4><TR><TD><A NAME="VisibilityChangeMask">VisibilityChangeMask</A> <TD><B><A HREF="window-state-change/visibility.html">VisibilityNotify</A></B> <TD><A HREF="window-state-change/visibility.html#XVisibilityEvent">XVisibilityEvent</A> <TD><TR><TD COLSPAN=4><HR></TABLE><P>The sections that follow describe the processing that occurs when you select the different event masks.The sections are organized according to these processing categories:<UL><P><LI><A HREF="keyboard-pointer/">Keyboard and pointer events</A><P><LI><A HREF="window-entry-exit/">Window crossing events</A><P><LI><A HREF="input-focus/">Input focus events</A><P><LI><A HREF="key-map.html">Keymap state notification events</A><P><LI><A HREF="exposure/">Exposure events</A><P><LI><A HREF="window-state-change/">Window state notification events</A><P><LI><A HREF="structure-control/">Structure control events</A><P><LI><A HREF="colormap-state.html">Colormap state notification events</A><P><LI><A HREF="client-communication/">Client communication events</A></UL><H5 ALIGN=right><I>Next: <A HREF="keyboard-pointer/">Keyboard and Pointer 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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