--- Screen.pm	2007/08/05 13:27:27	145
+++ Screen.pm	2007/08/05 19:44:20	161
@@ -23,6 +23,33 @@
 
 Screen - simulated 256*256 pixels monochrome screen using SDL
 
+=head1 Architecture dependent
+
+You may override following methods if you want to implement keyboard on each
+keypress event. Alternative is to use <read> hook and trap memory access.
+
+=head2 key_down
+
+  $self->key_down( 'a' );
+
+=cut
+
+sub key_down {}
+
+=head2 key_up
+
+  $self->key_up( 'a' );
+
+=cut
+
+sub key_up {}
+
+
+=head1 Architecture independent
+
+You don't need to override any of following function in your architecture,
+but you might want to call them.
+
 =head2 open_screen
 
 Open simulated screen
@@ -49,7 +76,7 @@
 	);
 	#$app->grab_input( SDL_GRAB_QUERY );
 	$app->grab_input( SDL_GRAB_OFF );
-	$app->title( ref($self) . ' ' . $self::VERSION );
+	$app->title( ref($self) );
 
 	$self->app( $app );
 
@@ -220,15 +247,6 @@
 my $pending_key;
 my $run_for = 2000;
 
-my $key_down;
-
-sub key_down {
-	my $self = shift;
-	my $key = shift;
-	warn "key_down($key) = ",$key_down->{$key}, "\n" if $self->debug;
-	return $key_down->{$key};
-}
-
 sub key_pressed {
 	my $self = shift;
 
@@ -237,7 +255,20 @@
 
 	my $event = $self->event || confess "no event?";
 
-	$event->poll || return $pending_key;
+	if ( ! $event->poll ) {
+		return $pending_key unless $self->can('session_event');
+		if ( my $h = $self->session_event('key_pressed') ) {
+			my ( $key, $state ) = %$h;
+			if ( $state ) {
+				$pending_key = $key;
+				$self->key_down( $key );
+			} else {
+				undef $pending_key;
+				$self->key_up( $key );
+			}
+		}
+		return $pending_key;
+	}
 
 	my $type = $event->type();
 
@@ -247,7 +278,6 @@
 
 	if ($type == SDL_KEYDOWN) {
 		$k = $event->key_name();
-		$key_down->{$k}++;
 		if ( $k eq 'escape' ) {
 			$run_for = $self->cli;
 			warn "will check event loop every $run_for cycles\n";
@@ -255,18 +285,18 @@
 		} else {
 			warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";
 			$pending_key = $k;
+			$self->key_down( $k );
+			$self->record_session('key_pressed', { $k => 1 });
 		}
 	} elsif ( $type == SDL_KEYUP ) {
 		my $up = $event->key_name();
-		$key_down->{$up} = 0;
 		warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
+		$self->key_up( $up );
+		$self->record_session('key_pressed', { $up => 0 });
 		undef $pending_key;
 	}
 
-	if ( $pending_key ) {
-		warn "key_pressed = $pending_key\n";
-		$self->record_session('key_pressed', $pending_key);
-	}
+	warn "key_pressed = $pending_key\n" if ( $pending_key );
 
 	return $pending_key;
 }
@@ -312,4 +342,5 @@
 under the same terms as Perl itself.
 
 =cut
+
 1;