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XVisibilityNotifyEvent(3X11)


X11R6


NAME

  XVisibilityEvent, XVisibilityNotifyEvent - VisibilityNotify event structure


DESCRIPTION

  The structure for VisibilityNotify events contains:

       typedef struct {
	       int type;	       /* VisibilityNotify */
	       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
  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 window whose visibility state changes.  The
  state member is set to the state of the window's visibility and can be
  VisibilityUnobscured, VisibilityPartiallyObscured, or
  VisibilityFullyObscured. 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
       generates the event with the state member of the XVisibilityEvent
       structure 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

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