SDLx::App
Section: User Contributed Perl Documentation (3)
Updated: 2021-01-27
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NAME
SDLx::App - a SDL perl extension
CATEGORY
Extension
SYNOPSIS
use SDL;
use SDLx::App;
use SDL::Event;
use SDL::Events;
my $app = SDLx::App->new(
title => 'Application Title',
width => 640,
height => 480,
depth => 32
);
This is the manual way of doing things
my $event = SDL::Event->new; # create a new event
SDL::Events::pump_events();
while ( SDL::Events::poll_event($event) ) {
my $type = $event->type(); # get event type
print $type;
exit if $type == SDL_QUIT;
}
An alternative to the manual Event processing is through the SDLx::Controller module. SDLx::App is a Controller so see the CALLBACKS section below.
DESCRIPTION
SDLx::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.
METHODS
new
"SDLx::App::new" initializes the
SDL, creates a new screen,
and initializes some of the window manager properties.
"SDLx::App::new" takes a series of named parameters:
- •
-
title
the window title. Defaults to the file name. Shorter alias: 't'
- •
-
icon_title
the icon title. Defaults to file name. Shortcut: 'it'
- •
-
icon
the icon itself. Defaults to none. Shortcut: 'i'
- •
-
width
Window width, in pixels. Defaults to 800. Shortcut: 'w'
- •
-
height
Window height, in pixels. Defaults to 600. Shortcut: 'h'
- •
-
depth
Screen depth. Defaults to 16. Shortcut: 'd'.
- •
-
flags
Any flags you want to pass to SDL::Video upon initialization. Defaults to SDL_ANYFORMAT. Flags should be or'ed together if you're passing more than one (flags => FOO|BAR). Shortcut: 'f'.
- •
-
resizeable
Set this to a true value to make the window resizeable by the user. Default is off.
- •
-
exit_on_quit
Set this to a true value to make the app exit if a SDL_QUIT event is triggered. Shortcut: 'eoq'.
METHODS
title()
title( $new_title )
title( $window_title, $icon_title )
"SDLx::App::title" takes 0, 1, or 2 arguments. If no parameter is given,
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.
delay( $ms )
"SDLx::App::delay" takes 1 argument, and will sleep the application for
that many ms.
ticks
"SDLx::App::ticks" returns the number of ms since the application began.
error
"SDLx::App::error" returns the last error message set by the
SDL.
resize( $width, $height )
"SDLx::App::resize" takes a new width and height of the application. Only
works if the application was originally created with the resizable option.
fullscreen
"SDLx::App::fullscreen" toggles the application in and out of fullscreen mode.
iconify
"SDLx::App::iconify" iconifies the application window.
grab_input( $CONSTANT )
"SDLx::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
sync
"SDLx::App::sync" encapsulates the various methods of synchronizing the screen with the
current video buffer.
"SDLx::App::sync" will do a fullscreen update, using the double buffer
or OpenGL buffer if applicable. This is preferred to calling flip on the application window.
attribute( $attr )
attribute( $attr, $value )
"SDLx::App::attribute" allows one to get and set
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 Carp::confess on failure.
CALLBACKS
"SDLx::App" is a
"SDLx::Controller". Use the event, show and handlers to run the app.
use SDL;
use SDLx::App;
use SDL::Event; #Where ever the event call back is processed
my $app = SDLx::App->new( width => 200, height => 200);
$app->add_event_handler( sub{
my ($event, $app) = @_;
return $_[0]->type == SDL_QUIT ? 0 : 1;
});
$app->add_show_handler( sub{
my ($delta, $app) = @_;
$app->update;
} );
$app->add_move_handler( sub{
my ($step, $app, $t) = @_;
#calc your physics here
} );
$app->run();
see SDLx::Controller for more details.
AUTHORS
See ``
AUTHORS'' in
SDL.
SEE ALSO
perl SDL::Surface SDL::Event SDL::OpenGL