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A Short History of Complex Event Processing Part 2: the rise of CEP

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Special Forums News, Links, Events and Announcements Complex Event Processing RSS News A Short History of Complex Event Processing Part 2: the rise of CEP
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Old 07-17-2008
A Short History of Complex Event Processing Part 2: the rise of CEP
by David Luckham This second article follows on from part 1 on the history of complex event processing CEP is the logical and obvious next step in the development of event processing that were described in our first article.** The explosion of event traffic over the past twenty years has created a new set of demands. [...]

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LEARN ABOUT SUSE

sdl::event

SDL::Event(3)						User Contributed Perl Documentation					     SDL::Event(3)

NAME

       SDL::Event - a SDL perl extension

SYNOPSIS

	use SDL::Event;
	my $event = new SDL::Event;		# create a new event
	$event->pump(); 			# pump all events from SDL Event Queue
	$event->poll(); 			# Get the top one from the queue
	while ($event->wait()) {
	       my $type = $event->type();      # get event type
	       # ... handle event
	       exit if $type == SDL_QUIT;
	}

DESCRIPTION

       "SDL::Event" offers an object-oriented approach to SDL events. By creating an instance of SDL::Event via new() you can wait for events, and
       then determine the type of the event and take an appropriate action.

EXAMPLE

       Here is an example of a simple event handler loop routine.  See also SDL::App::loop.

	      sub loop {
		      my ($self,$href) = @_;
		      my $event = new SDL::Event;
		      while ( $event->wait() ) {
			      # ... insert here your event handling like:
			      if ( ref($$href{$event->type()}) eq "CODE" ) {
				      &{$$href{$event->type()}}($event);
				      $self->sync();
			      }
		      }
	      }

METHODS

   new()
       Create a new event object.

   type()
       Returns the type of the event, see list of exported symbols for which are available.

   pump()
   poll()
   wait()
       Waits for an event end returns then. Always returns true.

   set( type, state )
       Set the state for all events of the given event's type

   set_unicode( toggle )
       Toggle unicode on the event.

   set_key_repeat( delay, interval)
       Sets the delay and intervall of the key repeat rate (e.g. when a user holds down a key on the keyboard).

   active_gain()
   active_state()
   key_state()
   key_sym()
   key_name()
   key_mod()
   key_unicode()
   key_scancode()
   motion_state()
   motion_x()
       Returns the motion of the mouse in X direction as an absolute value.

   motion_y()
       Returns the motion of the mouse in Y direction as an absolute value.

   motion_xrel()
       Returns the motion of the mouse in X direction as a relative value.

   motion_yrel()
       Returns the motion of the mouse in Y direction as a relative value.

   button_state()
       Returns the state of the mouse buttons.

   button_x()
   button_y()
   button()
AUTHOR

       David J. Goehrig Documentation by Tels <http://bloodgate.com/>

SEE ALSO

       perl SDL::App

perl v5.12.1							    2010-07-05							     SDL::Event(3)