XCrossingEvent(3X11) X11R5 XCrossingEvent(3X11)NAMEXCrossingEvent - EnterNotify and LeaveNotify event structure
STRUCTURES
The structure for and events contains:
typedef struct {
int type; /* EnterNotify or LeaveNotify */
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; /* ``event'' window reported relative to */
Window root; /* root window that the event occurred on */
Window subwindow; /* child window */
Time time; /* milliseconds */
int x, y; /* pointer x, y coordinates in event window */
int x_root, y_root; /* coordinates relative to root */
int mode; /* NotifyNormal, NotifyGrab, NotifyUngrab */
int detail;
/*
* NotifyAncestor, NotifyVirtual, NotifyInferior,
* NotifyNonlinear,NotifyNonlinearVirtual
*/
Bool same_screen; /* same screen flag */
Bool focus; /* boolean focus */
unsigned int state; /* key or button mask */
} XCrossingEvent;
typedef XCrossingEvent XEnterWindowEvent;
typedef XCrossingEvent XLeaveWindowEvent;
When you receive these events, the structure members are set as fol‐
lows.
The type member is set to the event type constant name that uniquely
identifies it. For example, when the X server reports a event to a
client application, it sends an structure with the type member set to
The display member is set to a pointer to the display the event was
read on. The send_event member is set to if the event came from a pro‐
tocol 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 on which the or event was gener‐
ated and is referred to as the event window. This is the window used
by the X server to report the event, and is relative to the root window
on which the event occurred. The root member is set to the root window
of the screen on which the event occurred.
For a event, if a child of the event window contains the initial posi‐
tion of the pointer, the subwindow component is set to that child.
Otherwise, the X server sets the subwindow member to For an event, if a
child of the event window contains the final pointer position, the sub‐
window component is set to that child or
The time member is set to the time when the event was generated and is
expressed in milliseconds. The x and y members are set to the coordi‐
nates of the pointer position in the event window. This position is
always the pointer's final position, not its initial position. If the
event window is on the same screen as the root window, x and y are the
pointer coordinates relative to the event window's origin. Otherwise,
x and y are set to zero. The x_root and y_root members are set to the
pointer's coordinates relative to the root window's origin at the time
of the event.
The same_screen member is set to indicate whether the event window is
on the same screen as the root window and can be either or If the event
and root windows are on the same screen. If the event and root windows
are not on the same screen.
The focus member is set to indicate whether the event window is the
focus window or an inferior of the focus window. The X server can set
this member to either or If the event window is the focus window or an
inferior of the focus window. If the event window is not the focus
window or an inferior of the focus window.
The state member is set to indicate the state of the pointer buttons
and modifier keys just prior to the event. The X server can set this
member to the bitwise inclusive OR of one or more of the button or mod‐
ifier key masks:
The mode member is set to indicate whether the events are normal
events, pseudo-motion events when a grab activates, or pseudo-motion
events when a grab deactivates. The X server can set this member to or
The detail member is set to indicate the notify detail and can be or
SEE ALSOXAnyEvent(3X11), XButtonEvent(3X11), XCreateWindowEvent(3X11), XCircu‐
lateEvent(3X11), XCirculateRequestEvent(3X11), XColormapEvent(3X11),
XConfigureEvent(3X11), XConfigureRequestEvent(3X11), XDestroyWindow‐
Event(3X11), XErrorEvent(3X11), XExposeEvent(3X11), XFo‐
cusChangeEvent(3X11), XGraphicsExposeEvent(3X11), XGravityEvent(3X11),
XKeymapEvent(3X11), XMapEvent(3X11), XMapRequestEvent(3X11), XProper‐
tyEvent(3X11), XReparentEvent(3X11), XResizeRequestEvent(3X11), XSelec‐
tionClearEvent(3X11), XSelectionEvent(3X11), XSelectionRe‐
questEvent(3X11), XUnmapEvent(3X11), XVisibilityEvent(3X11)
Xlib - C Language X Interface
XCrossingEvent(3X11)
