Since most applications that use CLX, can avoid the complexity of object sets, these routines are described in a separate section. The routines described in the next section that use the object set mechanism are based on these interfaces.
This function causes system:serve-event to notice when there
is input on display’s connection to the X11 server. When this
happens, system:serve-event invokes handler on
display in a dynamic context with an error handler bound that
flushes all events from display and returns. By returning,
the error handler declines to handle the error, but it will have
cleared all events; thus, entering the debugger will not result in
infinite errors due to streams that wait via
system:serve-event for input. Calling this repeatedly on the
same display establishes handler as a new handler,
replacing any previous one for display.
This function undoes the effect of
ext:enable-clx-event-handling.
This macro evaluates each form in a context where
system:serve-event invokes handler on display
whenever there is input on display’s connection to the X
server. This destroys any previously established handler for
display.