SDL::App - a SDL perl extension

Extension

	use SDL;
	use SDL::Event; 
	use SDL::App; 

	my $app = new SDL::App ( 
	-title => 'Application Title', 
	-width => 640, 
	-height => 480, 
	-depth => 32 ); 

This is the manual way of doing things

	my $event = new SDL::Event;             # create a new event 

	$event->pump();
	$event->poll();

	while ($event->wait()) { 
	  my $type = $event->type();      # get event type 
	  print $type; 
	  exit if $type == SDL_QUIT; 
	  }
An alternative to the manual Event processing is the L<SDL::App::loop> .

SDL::App controls the root window of the of your SDL based application. It extends the SDL::Surface class, and provides an interface to the window manager oriented functions.

SDL::App::new initializes the SDL, creates a new screen, and initializes some of the window manager properties. SDL::App::new takes a series of named parameters:

• -title
• -icon_title
• -icon
• -width
• -height
• -depth
• -flags
• -resizeable

SDL::App::title takes 0, 1, or 2 arguments. It returns the current application window title. If one parameter is passed, both the window title and icon title will be set to its value. If two parameters are passed the window title will be set to the first, and the icon title to the second.

SDL::App::delay takes 1 argument, and will sleep the application for that many ms.

SDL::App::ticks returns the number of ms since the application began.

SDL::App::error returns the last error message set by the SDL.

SDL::App::resize takes a new height and width of the application if the application was originally created with the -resizable option.

SDL::App::fullscreen toggles the application in and out of fullscreen mode.

SDL::App::iconify iconifies the applicaiton window.

SDL::App::grab_input can be used to change the input focus behavior of the application. It takes one argument, which should be one of the following:

* SDL_GRAB_QUERY

* SDL_GRAB_ON

* SDL_GRAB_OFF

SDL::App::loop is a simple event loop method which takes a reference to a hash of event handler subroutines. The keys of the hash must be SDL event types such as SDL_QUIT(), SDL_KEYDOWN(), and the like. The event method recieves as its parameter the event object used in the loop.

  Example:

	my $app = new SDL::App  -title => "test.app", 
				-width => 800, 
				-height => 600, 
				-depth => 32;

	my %actions = (
		SDL_QUIT() => sub { exit(0); },
		SDL_KEYDOWN() => sub { print "Key Pressed" },
	);

	$app->loop(\%actions);

SDL::App::sync encapsulates the various methods of syncronizing the screen with the current video buffer. SDL::App::sync will do a fullscreen update, using the double buffer or OpenGL buffer if applicable. This is prefered to calling flip on the application window.

SDL::App::attribute allows one to set and get GL attributes. By passing a value in addition to the attribute selector, the value will be set. SDL:::App::attribute always returns the current value of the given attribute, or croaks on failure.

David J. Goehrig Kartik Thakore

perl SDL::Surface SDL::Event SDL::OpenGL