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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 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:
state member of the
XVisibilityEvent structure set to VisibilityUnobscured.
state
member of the XVisibilityEvent structure set to
VisibilityPartiallyObscured.
state
member of the XVisibilityEvent structure set to
VisibilityFullyObscured.