XNextEvent(3X11)              X11 SDE 5.4R3.00              XNextEvent(3X11)


NAME
       XNextEvent, XPeekEvent, XWindowEvent, XCheckWindowEvent, XMaskEvent,
       XCheckMaskEvent, XCheckTypedEvent, XCheckTypedWindowEvent - select
       events by type

SYNTAX
       XNextEvent(display, eventreturn)
             Display *display;
             XEvent *eventreturn;

       XPeekEvent(display, eventreturn)
             Display *display;
             XEvent *eventreturn;

       XWindowEvent(display, w, eventmask, eventreturn)
             Display *display;
             Window w;
             long eventmask;
             XEvent *eventreturn;

       Bool XCheckWindowEvent(display, w, eventmask, eventreturn)
             Display *display;
             Window w;
             long eventmask;
             XEvent *eventreturn;

       XMaskEvent(display, eventmask, eventreturn)
             Display *display;
             long eventmask;
             XEvent *eventreturn;

       Bool XCheckMaskEvent(display, eventmask, eventreturn)
             Display *display;
             long eventmask;
             XEvent *eventreturn;

       Bool XCheckTypedEvent(display, eventtype, eventreturn)
             Display *display;
             int eventtype;
             XEvent *eventreturn;

       Bool XCheckTypedWindowEvent(display, w, eventtype, eventreturn)
             Display *display;
             Window w;
             int eventtype;
             XEvent *eventreturn;

ARGUMENTS
       display   Specifies the connection to the X server.

       eventmask
                 Specifies the event mask.





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XNextEvent(3X11)              X11 SDE 5.4R3.00              XNextEvent(3X11)


       eventreturn
                 Returns the matched event's associated structure.

       eventreturn
                 Returns the next event in the queue.

       eventreturn
                 Returns a copy of the matched event's associated structure.

       eventtype
                 Specifies the event type to be compared.


       w         Specifies the window  whose event uou are interested in.

DESCRIPTION
       The XNextEvent function copies the first event from the event queue
       into the specified XEvent structure and then removes it from the
       queue.  If the event queue is empty, XNextEvent flushes the output
       buffer and blocks until an event is received.

       The XPeekEvent function returns the first event from the event queue,
       but it does not remove the event from the queue.  If the queue is
       empty, XPeekEvent flushes the output buffer and blocks until an event
       is received.  It then copies the event into the client-supplied
       XEvent structure without removing it from the event queue.

       The XWindowEvent function searches the event queue for an event that
       matches both the specified window and event mask.  When it finds a
       match, XWindowEvent removes that event from the queue and copies it
       into the specified XEvent structure.  The other events stored in the
       queue are not discarded.  If a matching event is not in the queue,
       XWindowEvent flushes the output buffer and blocks until one is
       received.

       The XCheckWindowEvent function searches the event queue and then the
       events available on the server connection for the first event that
       matches the specified window and event mask.  If it finds a match,
       XCheckWindowEvent removes that event, copies it into the specified
       XEvent structure, and returns True.  The other events stored in the
       queue are not discarded.  If the event you requested is not
       available, XCheckWindowEvent returns False, and the output buffer
       will have been flushed.

       The XMaskEvent function searches the event queue for the events
       associated with the specified mask.  When it finds a match,
       XMaskEvent removes that event and copies it into the specified XEvent
       structure.  The other events stored in the queue are not discarded.
       If the event you requested is not in the queue, XMaskEvent flushes
       the output buffer and blocks until one is received.

       The XCheckMaskEvent function searches the event queue and then any
       events available on the server connection for the first event that
       matches the specified mask.  If it finds a match, XCheckMaskEvent



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XNextEvent(3X11)              X11 SDE 5.4R3.00              XNextEvent(3X11)


       removes that event, copies it into the specified XEvent structure,
       and returns True.  The other events stored in the queue are not
       discarded.  If the event you requested is not available,
       XCheckMaskEvent returns False, and the output buffer will have been
       flushed.

       The XCheckTypedEvent function searches the event queue and then any
       events available on the server connection for the first event that
       matches the specified type.  If it finds a match, XCheckTypedEvent
       removes that event, copies it into the specified XEvent structure,
       and returns True.  The other events in the queue are not discarded.
       If the event is not available, XCheckTypedEvent returns False, and
       the output buffer will have been flushed.

       The XCheckTypedWindowEvent function searches the event queue and then
       any events available on the server connection for the first event
       that matches the specified type and window.  If it finds a match,
       XCheckTypedWindowEvent removes the event from the queue, copies it
       into the specified XEvent structure, and returns True.  The other
       events in the queue are not discarded.  If the event is not
       available, XCheckTypedWindowEvent returns False, and the output
       buffer will have been flushed.

SEE ALSO
       XAnyEvent(3X11), XIfEvent(3X11), XPutBackEvent(3X11),
       XSendEvent(3X11)
       Xlib - C Language X Interface






























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