XAnyEvent(XS)     X Version 11 (Release 5) 6 January 1993      XAnyEvent(XS)


 Name

    XAnyEvent - generic X event structures

 Structures

    All the event structures declared in <X11/Xlib.h> have the following com-
    mon 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 structure
    with the type member set to GraphicsExpose.  The display member is set to
    a pointer to the display the event was read on.  The sendevent 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
    sendevent, 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 toolkits, 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(XS), XCreateWindowEvent(XS), XCirculateEvent(XS),
    XCirculateRequestEvent(XS), XColormapEvent(XS), XConfigureEvent(XS),
    XConfigureRequestEvent(XS), XDestroyWindowEvent(XS), XCrossingEvent(XS),
    XErrorEvent(XS), XExposeEvent(XS), XFocusChangeEvent(XS),
    XGraphicsExposeEvent(XS), XGravityEvent(XS), XKeymapEvent(XS),
    XMapEvent(XS), XMapRequestEvent(XS), XPropertyEvent(XS),
    XReparentEvent(XS), XResizeRequestEvent(XS), XSelectionClearEvent(XS),
    XSelectionEvent(XS), XSelectionRequestEvent(XS), XUnmapEvent(XS),
    XVisibilityEvent(XS)
    Xlib - C Language X Interface