Fixed input listening bug in NaturalPlayer

+ disconnect methods in Game and Player
+ NaturalPlayer removes its MouseListener from OverlayComponent after
the disconnect method is called

src/dev/kske/chess/game/Game.java

@@ -93,5 +93,12 @@ public class Game {
 		overlayComponent.clearArrow();
 	}
 
+	/**
+	 * Removed all connections between the game and the ui.
+	 */
+	public void disconnect() {
+		players.values().forEach(Player::disconnect);
+	}
+
 	public Board getBoard() { return board; }
 }

src/dev/kske/chess/game/NaturalPlayer.java

@@ -1,7 +1,7 @@
 package dev.kske.chess.game;
 
-import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -18,16 +18,35 @@ import dev.kske.chess.ui.OverlayComponent;
  * Created: <strong>06.07.2019</strong><br>
  * Author: <strong>Kai S. K. Engelbart</strong>
  */
-public class NaturalPlayer extends Player {
+public class NaturalPlayer extends Player implements MouseListener {
+
+	private final OverlayComponent overlayComponent;
 
 	private boolean		moveRequested;
+	private Position	pos;
 
 	public NaturalPlayer(Color color, OverlayComponent overlayComponent) {
 		super(color);
+		this.overlayComponent	= overlayComponent;
 		moveRequested			= false;
-		overlayComponent.addMouseListener(new MouseAdapter() {
 
-			private Position pos;
+		overlayComponent.addMouseListener(this);
+	}
+
+	@Override
+	public void requestMove() {
+		moveRequested = true;
+	}
+
+	@Override
+	public void cancelMove() {
+		moveRequested = false;
+	}
+
+	@Override
+	public void disconnect() {
+		overlayComponent.removeMouseListener(this);
+	}
 
 	@Override
 	public void mousePressed(MouseEvent evt) {
@@ -54,16 +73,16 @@ public class NaturalPlayer extends Player {
 			pos = null;
 		}
 	}
-		});
-	}
 
 	@Override
-	public void requestMove() {
-		moveRequested = true;
-	}
+	public void mouseClicked(MouseEvent e) {}
 
 	@Override
-	public void cancelMove() {
-		moveRequested = false;
-	}
+	public void mouseReleased(MouseEvent e) {}
+
+	@Override
+	public void mouseEntered(MouseEvent e) {}
+
+	@Override
+	public void mouseExited(MouseEvent e) {}
 }

src/dev/kske/chess/game/Player.java

@@ -23,6 +23,8 @@ public abstract class Player {
 
 	public abstract void cancelMove();
 
+	public abstract void disconnect();
+
 	public Game getGame() { return game; }
 
 	public void setGame(Game game) {

src/dev/kske/chess/game/ai/AIPlayer.java

@@ -98,4 +98,7 @@ public class AIPlayer extends Player {
 			}
 		}
 	}
+
+	@Override
+	public void disconnect() {}
 }