XExposeEvent(3X11)  X Version 11 (Release 4)   XExposeEvent(3X11)



  NAME
       XExposeEvent - Expose event structure

  STRUCTURES
       The structure for Expose events contains:

       typedef struct {
            int type;                /* Expose */
            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;
            int x, y;
            int width, height;
            int count;               /* if nonzero, at least this many more */
       } XExposeEvent;

       When you receive this event, the structure members are set
       as follows.

       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 window member is set to the exposed (damaged) window.
       The x and y members are set to the coordinates relative to
       the window's origin and indicate the upper-left corner of
       the rectangle.  The width and height members are set to the
       size (extent) of the rectangle.  The count member is set to
       the number of Expose events that are to follow.  If count is
       zero, no more Expose events follow for this window.


  Page 1                                          (printed 8/30/91)

  XExposeEvent(3X11)  X Version 11 (Release 4)   XExposeEvent(3X11)



       However, if count is nonzero, at least that number of Expose
       events (and possibly more) follow for this window.  Simple
       applications that do not want to optimize redisplay by
       distinguishing between subareas of its window can just
       ignore all Expose events with nonzero counts and perform
       full redisplays on events with zero counts.

  SEE ALSO
       XAnyEvent(3X11), XButtonEvent(3X11),
       XCreateWindowEvent(3X11), XCirculateEvent(3X11),
       XCirculateRequestEvent(3X11), XColormapEvent(3X11),
       XConfigureEvent(3X11), XConfigureRequestEvent(3X11),
       XCrossingEvent(3X11), XDestroyWindowEvent(3X11),
       XErrorEvent(3X11), XFocusChangeEvent(3X11),
       XGraphicsExposeEvent(3X11), XGravityEvent(3X11),
       XKeymapEvent(3X11), XMapEvent(3X11), XMapRequestEvent(3X11),
       XPropertyEvent(3X11), XReparentEvent(3X11),
       XResizeRequestEvent(3X11), XSelectionClearEvent(3X11),
       XSelectionEvent(3X11), XSelectionRequestEvent(3X11),
       XUnmapEvent(3X11), XVisibilityEvent(3X11)
       Xlib - C Language X Interface





















  Page 2                                          (printed 8/30/91)