XVisibilityEvent(3X11RISC/os Reference ManuXVisibilityEvent(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, Visi-
     bilityPartiallyObscured, or VisibilityFullyObscured.  The X
     server ignores all of a window's subwindows when determining
     the visibility state of the window and processes Visibili-
     tyNotify events according to the following:

     ⊕    When the window changes state from partially obscured,
          fully obscured, or not viewable to viewable and com-
          pletely 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 com-
          pletely unobscured or not viewable to viewable and par-
          tially 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



                         Printed 1/24/91         Release 4 Page 1

XVisibilityEvent(3X11RISC/os Reference ManuXVisibilityEvent(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 VisibilityFullyOb-
          scured.

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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