XNextEvent(3)

NAME
XNextEvent, XPeekEvent, XWindowEvent, XCheckWindowEvent, XMaskEvent, XCheckMaskEvent, XCheckTypedEvent, XCheckTypedWindowEvent - select events by type

SYNTAX

int XNextEvent(Display *display, XEvent *event_return);

int XPeekEvent(Display *display, XEvent *event_return);

int XWindowEvent(Display *display, Window w, long event_mask, XEvent *event_return);

Bool XCheckWindowEvent(Display *display, Window w, long event_mask, XEvent *event_return);

int XMaskEvent(Display *display, long event_mask, XEvent *event_return);

Bool XCheckMaskEvent(Display *display, long event_mask, XEvent *event_return);

Bool XCheckTypedEvent(Display *display, int event_type, XEvent *event_return);

Bool XCheckTypedWindowEvent(Display *display, Window w, int event_type, XEvent *event_return);

ARGUMENTS

display
    Specifies the connection to the X server.

event_mask
    Specifies the event mask.

event_return
    Returns the matched event's associated structure.

event_return
    Returns the next event in the queue.

event_return
    Returns a copy of the matched event's associated structure.

event_type
    Specifies the event type to be compared.

w   Specifies the window whose event uou are interested in.

DESCRIPTION
The function copies the first event from the event queue into the specified structure and then removes it from the queue. If the event queue is empty, flushes the output buffer and blocks until an event is received.

The function returns the first event from the event queue, but it does not remove the event from the queue. If the queue is empty, flushes the output buffer and blocks until an event is received. It then copies the event into the client-supplied structure without removing it from the event queue.

The function searches the event queue for an event that matches both the specified window and event mask. When it finds a match, removes that event from the queue and copies it into the specified structure. The other events stored in the queue are not discarded. If a matching event is not in the queue, flushes the output buffer and blocks until one is received.

The function searches the event queue and then the events available on the server connection for the first event that matches the specified window and event mask. If it finds a match, removes that event, copies it into the specified structure, and returns The other events stored in the queue are not discarded. If the event you requested is not available, returns and the output buffer will have been flushed.

The function searches the event queue for the events associated with the specified mask. When it finds a match, removes that event and copies it into the specified structure. The other events stored in the queue are not discarded. If the event you requested is not in the queue, flushes the output buffer and blocks until one is received.

The function searches the event queue and then any events available on the server connection for the first event that matches the specified mask. If it finds a match, removes that event, copies it into the specified structure, and returns The other events stored in the queue are not discarded. If the event you requested is not available, returns and the output buffer will have been flushed.

The function searches the event queue and then any events available on the server connection for the first event that matches the specified type. If it finds a match, removes that event, copies it into the specified structure, and returns The other events in the queue are not discarded. If the event is not available, returns and the output buffer will have been flushed.

The function searches the event queue and then any events available on the server connection for the first event that matches the specified type and window. If it finds a match, removes the event from the queue, copies it into the specified structure, and returns The other events in the queue are not discarded. If the event is not available, returns and the output buffer will have been flushed.

SEE ALSO
XAnyEvent(3), XIfEvent(3), XPutBackEvent(3), XSendEvent(3)
Xlib - C Language X Interface