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XAnyEvent(3)                    XLIB FUNCTIONS                    XAnyEvent(3)




NAME

       XAnyEvent, XEvent - generic X event structures


STRUCTURES

       All  the  event  structures declared in <X11/Xlib.h> have the following
       common members: typedef struct {
               int type;
               unsigned long serial;   /*  #  of  last  request  processed  by
       server */
               Bool  send_event;         /* true if this came from a SendEvent
       request */
               Display *display;       /* Display the event was read from */
               Window window; } XAnyEvent;

       The type member is set to the event type constant  name  that  uniquely
       identifies it.  For example, when the X server reports a GraphicsExpose
       event to a client application, it sends an XGraphicsExposeEvent  struc-
       ture with the type member set to GraphicsExpose.  The display member is
       set to a pointer to the display the event was read on.  The  send_event
       member  is  set  to  True  if  the event came from a SendEvent protocol
       request.  The serial member is set from the serial number  reported  in
       the  protocol  but expanded from the 16-bit least-significant bits to a
       full 32-bit value.  The window member is set to the window that is most
       useful to toolkit dispatchers.

       The  XEvent  structure is a union of the individual structures declared
       for each event type: typedef union _XEvent {
               int type;       /* must not be changed */
               XAnyEvent xany;
               XKeyEvent xkey;
               XButtonEvent xbutton;
               XMotionEvent xmotion;
               XCrossingEvent xcrossing;
               XFocusChangeEvent xfocus;
               XExposeEvent xexpose;
               XGraphicsExposeEvent xgraphicsexpose;
               XNoExposeEvent xnoexpose;
               XVisibilityEvent xvisibility;
               XCreateWindowEvent xcreatewindow;
               XDestroyWindowEvent xdestroywindow;
               XUnmapEvent xunmap;
               XMapEvent xmap;
               XMapRequestEvent xmaprequest;
               XReparentEvent xreparent;
               XConfigureEvent xconfigure;
               XGravityEvent xgravity;
               XResizeRequestEvent xresizerequest;
               XConfigureRequestEvent xconfigurerequest;
               XCirculateEvent xcirculate;
               XCirculateRequestEvent xcirculaterequest;
               XPropertyEvent xproperty;
               XSelectionClearEvent xselectionclear;
               XSelectionRequestEvent xselectionrequest;
               XSelectionEvent xselection;
               XColormapEvent xcolormap;
               XClientMessageEvent xclient;
               XMappingEvent xmapping;
               XErrorEvent xerror;
               XKeymapEvent xkeymap;
               long pad[24]; } XEvent;

       An XEvent structure's first entry always is the type member,  which  is
       set  to  the event type.  The second member always is the serial number
       of the protocol request that generated the  event.   The  third  member
       always  is  send_event, which is a Bool that indicates if the event was
       sent by a different client.  The fourth member  always  is  a  display,
       which  is  the display that the event was read from.  Except for keymap
       events, the fifth member always is a window, which has  been  carefully
       selected  to be useful to toolkit dispatchers.  To avoid breaking tool-
       kits, the order of these first five entries is  not  to  change.   Most
       events  also contain a time member, which is the time at which an event
       occurred.  In addition, a pointer to the generic  event  must  be  cast
       before it is used to access any other information in the structure.


SEE ALSO

       XButtonEvent(3),   XCreateWindowEvent(3),  XCirculateEvent(3),  XCircu-
       lateRequestEvent(3), XColormapEvent(3), XConfigureEvent(3),  XConfigur-
       eRequestEvent(3),   XCrossingEvent(3),   XDestroyWindowEvent(3),   XEr-
       rorEvent(3),   XExposeEvent(3),   XFocusChangeEvent(3),    XGraphicsEx-
       poseEvent(3),  XGravityEvent(3), XKeymapEvent(3), XMapEvent(3), XMapRe-
       questEvent(3),    XPropertyEvent(3),     XReparentEvent(3),     XResiz-
       eRequestEvent(3),  XSelectionClearEvent(3), XSelectionEvent(3), XSelec-
       tionRequestEvent(3), XUnmapEvent(3), XVisibilityEvent(3)
       Xlib - C Language X Interface



X Version 11                     libX11 1.7.1                     XAnyEvent(3)

xorg-libX11 1.7.1 - Generated Fri May 21 08:02:24 CDT 2021
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