XVisibilityEvent(3X11)	       XLIB FUNCTIONS	       XVisibilityEvent(3X11)



NAME
  XVisibilityNotifyEvent - VisibilityNotify event structure

STRUCTURES
  The structure for VisibilityNotify events contains:

  typedef struct {
       int type;		/* VisibiltyNotify */
       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 state;
  } XVisibilityEvent;

  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 iden-
  tifies 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 window whose visibility state changes.  The
  state member is set to the state of the window's visibility and can be
  VisibilityUnobscured, VisibilityPartiallyObscured, or VisibilityFullyOb-
  scured.  The X server ignores all of a window's subwindows when determining
  the visibility state of the window and processes VisibilityNotify events
  according to the following:

  +    When the window changes state from partially obscured, fully obscured,
       or not viewable to viewable and completely unobscured, the X server
       generates the event with the state member of the XVisibilityEvent
       structure set to VisibilityUnobscured.

  +    When the window changes state from viewable and completely unobscured
       or not viewable to viewable and partially obscured, the X server gen-
       erates the event with the state member of the XVisibilityEvent struc-
       ture set to VisibilityPartiallyObscured.

  +    When the window changes state from viewable and completely unobscured,
       viewable and partially obscured, or not viewable to viewable and fully
       obscured, the X server generates the event with the state member of
       the XVisibilityEvent structure set to VisibilityFullyObscured.

SEE ALSO
  XAnyEvent(3X11), XButtonEvent(3X11), XCreateWindowEvent(3X11),
  XCirculateEvent(3X11), XCirculateRequestEvent(3X11), XColormapEvent(3X11),
  XConfigureEvent(3X11), XConfigureRequestEvent(3X11), XCrossingEvent(3X11),
  XDestroyWindowEvent(3X11), XErrorEvent(3X11), XExposeEvent(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),
  Xlib - C Language X Interface