XExposeEvent(3X11)  RISC/os Reference Manual   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.  How-
     ever, 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 dis-
     tinguishing 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),



                         Printed 1/24/91         Release 4 Page 1

XExposeEvent(3X11)  RISC/os Reference Manual   XExposeEvent(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














































Release 4 Page 2         Printed 1/24/91