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 GraphicsEx-
       pose 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 VisibilityFullyOb-
	    scured.

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), XGraphicsEx-
       poseEvent(3), XGravityEvent(3), XKeymapEvent(3), XMapEvent(3), XMapRequestEvent(3), XPropertyEvent(3), XReparentEvent(3), XResiz-
       eRequestEvent(3), XSelectionClearEvent(3), XSelectionEvent(3), XSelectionRequestEvent(3), XUnmapEvent(3),
       Xlib - C Language X Interface

X Version 11							   libX11 1.3.2 					       XVisibilityEvent(3)