Layered screen added

src/mightypork/rogue/display/LayeredScreen.java

@@ -0,0 +1,65 @@
+package mightypork.rogue.display;
+
+
+import java.util.ArrayList;
+import java.util.List;
+
+import mightypork.rogue.AppAccess;
+import mightypork.rogue.display.rendering.ScreenLayer;
+
+
+public abstract class LayeredScreen extends Screen {
+	
+	private List<ScreenLayer> layers = new ArrayList<ScreenLayer>();
+	
+	
+	public LayeredScreen(AppAccess app) {
+		super(app);
+	}
+	
+	
+	@Override
+	protected abstract void initScreen();
+	
+	
+	@Override
+	protected abstract void deinitScreen();
+	
+	
+	@Override
+	protected abstract void onScreenEnter();
+	
+	
+	@Override
+	protected abstract void onScreenLeave();
+	
+	
+	@Override
+	protected void renderScreen()
+	{
+		// in reverse order (topmost added last)
+		for (int i = layers.size() - 1; i >= 0; i--) {
+			layers.get(i).render();
+		}
+	}
+	
+	
+	@Override
+	protected void updateScreen(double delta)
+	{
+		// no impl
+	}
+	
+	
+	protected void addLayer(ScreenLayer layer)
+	{
+		this.layers.add(layer);
+	}
+	
+	
+	protected void removeLayer(ScreenLayer layer)
+	{
+		this.layers.remove(layer);
+	}
+	
+}

src/mightypork/rogue/display/Screen.java

@@ -2,6 +2,7 @@ package mightypork.rogue.display;
 
 
 import static org.lwjgl.opengl.GL11.*;
+
 import mightypork.rogue.AppAccess;
 import mightypork.rogue.bus.DelegatingBusClient;
 import mightypork.rogue.bus.events.ScreenChangeEvent;
@@ -233,6 +234,9 @@ public abstract class Screen extends DelegatingBusClient implements KeyBinder, B
 		
 		renderBegin();
 		renderScreen();
+		
+		// TODO render layers ?
+		
 		renderEnd();
 	}
 	

src/mightypork/rogue/display/rendering/ScreenLayer.java

@@ -1,18 +1,29 @@
 package mightypork.rogue.display.rendering;
 
 
-import mightypork.rogue.AppAccess;
-import mightypork.rogue.bus.DelegatingBusClient;
+import mightypork.rogue.bus.UpdateReceiver;
+import mightypork.rogue.display.Screen;
 
 
-public abstract class ScreenLayer extends DelegatingBusClient implements Renderable {
+public abstract class ScreenLayer extends UpdateReceiver implements Renderable {
 	
-	public ScreenLayer(AppAccess app) {
-		super(app, true);
+	private Screen screen;
+
+	public ScreenLayer(Screen screen) {
+		super(screen);
+		this.screen = screen;
 	}
 	
 	
 	@Override
 	public abstract void render();
 	
+	
+	@Override
+	public abstract void update(double delta);
+	
+	protected Screen screen() {
+		return screen;
+	}
+	
 }