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     X Version 11 (Release 5)                   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 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



     Licensed material--property of copyright holder(s)         Page 1

                         X Version 11 (Release 5)
XVisibilityEvent(3X11)



               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



































     Licensed material--property of copyright holder(s)         Page 2