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XVisibilityEvent(3)             XLIB FUNCTIONS             XVisibilityEvent(3)


NAME

       XVisibilityEvent - VisibilityNotify event structure


STRUCTURES

       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:

       o    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.

       o    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.

       o    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(3), XButtonEvent(3), XCreateWindowEvent(3),
       XCirculateEvent(3), XCirculateRequestEvent(3), XColormapEvent(3),
       XConfigureEvent(3), XConfigureRequestEvent(3), XCrossingEvent(3),
       XDestroyWindowEvent(3), XErrorEvent(3), XExposeEvent(3),
       XFocusChangeEvent(3), XGraphicsExposeEvent(3), XGravityEvent(3),
       XKeymapEvent(3), XMapEvent(3), XMapRequestEvent(3), XPropertyEvent(3),
       XReparentEvent(3), XResizeRequestEvent(3), XSelectionClearEvent(3),
       XSelectionEvent(3), XSelectionRequestEvent(3), XUnmapEvent(3),
       Xlib - C Language X Interface

X Version 11                     libX11 1.8.6              XVisibilityEvent(3)

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