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XExposeEvent(3X11)
X11R6
NAME
  XExposeEvent - Expose event structure

DESCRIPTION
  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. 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

Index for Section 3X11

Alphabetical listing for X

Top of page