XVisibilityEvent(3X11) XLIB FUNCTIONS XVisibilityEvent(3X11)NAMEXVisibilityNotifyEvent - 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 applica-
tion, 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 pro-
cesses 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 com-
pletely unobscured or not viewable to viewable and
partially obscured, the X server generates the event
with the state member of the XVisibilityEvent struc-
ture set to VisibilityPartiallyObscured.
o When the window changes state from viewable and com-
pletely unobscured, viewable and partially obscured,
or not viewable to viewable and fully obscured, the X
X Version 11 Release 6.4 1
XVisibilityEvent(3X11) XLIB FUNCTIONS XVisibilityEvent(3X11)
server generates the event with the state member of
the XVisibilityEvent structure set to
VisibilityFullyObscured.
SEE ALSOXAnyEvent(3X11), XButtonEvent(3X11), XCreateWindow-
Event(3X11), XCirculateEvent(3X11), XCircu-
lateRequestEvent(3X11), XColormapEvent(3X11), XConfig-
ureEvent(3X11), XConfigureRequestEvent(3X11),
XCrossingEvent(3X11), XDestroyWindowEvent(3X11), XEr-
rorEvent(3X11), XExposeEvent(3X11), XFo-
cusChangeEvent(3X11), XGraphicsExposeEvent(3X11), XGravi-
tyEvent(3X11), XKeymapEvent(3X11), XMapEvent(3X11),
XMapRequestEvent(3X11), XPropertyEvent(3X11), XRepar-
entEvent(3X11), XResizeRequestEvent(3X11), XSelection-
ClearEvent(3X11), XSelectionEvent(3X11), XSelectionRe-
questEvent(3X11), XUnmapEvent(3X11),
Xlib - C Language X Interface
X Version 11 Release 6.4 2
