v0.8.0: refactored KeyAction into int constants so it can be expanded

SPD-classes/src/main/java/com/watabou/noosa/Game.java

@@ -30,7 +30,7 @@ import com.watabou.gltextures.TextureCache;
 import com.watabou.glwrap.Blending;
 import com.watabou.glwrap.Vertexbuffer;
 import com.watabou.input.InputHandler;
-import com.watabou.input.KeyEvent;
+import com.watabou.input.KeyAction;
 import com.watabou.noosa.audio.Music;
 import com.watabou.noosa.audio.Sample;
 import com.watabou.utils.Callback;
@@ -100,6 +100,7 @@ public class Game implements ApplicationListener {
 		Blending.useDefault();
 		
 		inputHandler = new InputHandler( Gdx.input );
+		KeyAction.initialize();
 		
 		//refreshes texture and vertex data stored on the gpu
 		TextureCache.reload();

SPD-classes/src/main/java/com/watabou/noosa/Scene.java

@@ -21,6 +21,7 @@
 
 package com.watabou.noosa;
 
+import com.watabou.input.KeyAction;
 import com.watabou.input.KeyBindings;
 import com.watabou.input.KeyEvent;
 import com.watabou.utils.Signal;
@@ -35,10 +36,10 @@ public class Scene extends Group {
 			public boolean onSignal( KeyEvent event ) {
 				if (Game.instance != null && event.pressed) {
 					switch (KeyBindings.getBinding( event )) {
-						case BACK:
+						case KeyAction.BACK:
 							onBackPressed();
 							break;
-						case MENU:
+						case KeyAction.MENU:
 							onMenuPressed();
 							break;
 					}

SPD-classes/src/main/java/com/watabou/noosa/ui/Button.java

@@ -66,7 +66,7 @@ public class Button extends Component {
 		KeyEvent.addKeyListener( keyListener = new Signal.Listener<KeyEvent>() {
 			@Override
 			public boolean onSignal ( KeyEvent event ) {
-				if ( active && !event.pressed && KeyBindings.getBinding( event ) != null
+				if ( active && !event.pressed
 						&& KeyBindings.getBinding( event ) == keyAction()){
 					onClick();
 					return true;
@@ -78,8 +78,8 @@ public class Button extends Component {
 	
 	private Signal.Listener<KeyEvent> keyListener;
 	
-	public KeyAction keyAction(){
-		return null;
+	public int keyAction(){
+		return KeyAction.NONE;
 	}
 	
 	@Override