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:

       •    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(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 1.8.7                               XVisibilityEvent(3)