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X11R7.4 - man page for xanyevent (x11r4 section 3)

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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 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 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 gener-
       ated 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 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 addi-
       tion, a pointer to the generic event must be cast before it is used to access any other
       information in the structure.

SEE ALSO
       XButtonEvent(3X11), XCreateWindowEvent(3X11), XCirculateEvent(3X11), XCircu-
       lateRequestEvent(3X11), XColormapEvent(3X11), XConfigureEvent(3X11), XConfigur-
       eRequestEvent(3X11), XCrossingEvent(3X11), XDestroyWindowEvent(3X11), XErrorEvent(3X11),
       XExposeEvent(3X11), XFocusChangeEvent(3X11), XGraphicsExposeEvent(3X11), XGravi-
       tyEvent(3X11), XKeymapEvent(3X11), XMapEvent(3X11), XMapRequestEvent(3X11), XProper-
       tyEvent(3X11), XReparentEvent(3X11), XResizeRequestEvent(3X11), XSelection-
       ClearEvent(3X11), XSelectionEvent(3X11), XSelectionRequestEvent(3X11), XUnmapEvent(3X11),
       XVisibilityEvent(3X11)
       Xlib - C Language X Interface

X Version 11				   libX11 1.2.1 			     XAnyEvent(3)
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