XVisibilityEvent(3X11) XLIB FUNCTIONS XVisibilityEvent(3X11)
XVisibilityEvent - VisibilityNotify event structure
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, 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
XFree86 Version 4.5.0 1
XVisibilityEvent(3X11) XLIB FUNCTIONS 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 VisibilityFullyOb-
scured.
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
XFree86 Version 4.5.0 2
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