solution for exercise 10

added BackgroundMusic which is being handled in BackgroundMusic.java
changed the menu to incoporate volume controls for the music

Projekte/battleship/client/src/main/java/pp/battleship/client/BackgroundMusic.java

@@ -0,0 +1,101 @@
+package pp.battleship.client;
+
+import com.jme3.app.Application;
+import com.jme3.audio.AudioData.DataType;
+import com.jme3.audio.AudioNode;
+import com.jme3.audio.AudioSource.Status;
+
+import java.util.prefs.Preferences;
+
+public class BackgroundMusic {
+    private static final String VOLUME_PREF = "volume";
+    private static final String MUSIC_ENABLED_PREF = "musicEnabled";
+    private Preferences prefs = Preferences.userNodeForPackage(BackgroundMusic.class);
+
+
+    private final AudioNode backgroundMusic;
+    private boolean musicEnabled;
+    private float volume;
+
+    /**
+     * Initializes and controls the BackgroundMusic
+     *
+     * @param app The main Application
+     * @param musicFilePath The Path for the specific background music
+     */
+    public BackgroundMusic(Application app, String musicFilePath) {
+        this.volume = prefs.getFloat(VOLUME_PREF, 1.0f);
+        this.musicEnabled = prefs.getBoolean(MUSIC_ENABLED_PREF, true);
+
+        backgroundMusic = new AudioNode(app.getAssetManager(), musicFilePath, DataType.Stream);
+        backgroundMusic.setLooping(true);
+        backgroundMusic.setPositional(false);
+        backgroundMusic.setVolume(1.0f);
+
+        if(musicEnabled) {
+            play();
+        }
+    }
+
+    /**
+     * Plays the music if the music is Stopped or paused
+     */
+    public void play() {
+        if (musicEnabled && (backgroundMusic.getStatus() == Status.Stopped || backgroundMusic.getStatus() == Status.Paused)) {
+            backgroundMusic.play();
+        }
+    }
+
+    /**
+     * Stops the music if it is playing
+     */
+    public void stop(){
+        if (backgroundMusic.getStatus() == Status.Playing) {
+            backgroundMusic.stop();
+        }
+    }
+
+    /**
+     * Toggle Method to control the music
+     */
+    public void toogleMusic() {
+        this.musicEnabled = !this.musicEnabled;
+        if (musicEnabled) {
+            play();
+        } else {
+            stop();
+        }
+
+        prefs.putFloat(VOLUME_PREF, volume);
+    }
+
+    /**
+     * Method to set the volume for the music
+     *
+     * @param volume float to transfer the new volume
+     */
+    public void setVolume(float volume) {
+        this.volume = volume;
+        backgroundMusic.setVolume(volume);
+
+        prefs.putFloat(VOLUME_PREF, volume);
+    }
+
+    /**
+     * This method retuns the volume
+     *
+     * @return the current volume as a float
+     */
+    public float getVolume() {
+        return volume;
+    }
+
+    /**
+     * Returns if music should be played or not
+     *
+     * @return boolean value in music should be played
+     */
+    public boolean isMusicEnabled() {
+        return musicEnabled;
+    }
+}

Projekte/battleship/client/src/main/java/pp/battleship/client/BattleshipApp.java

@@ -122,6 +122,11 @@ public class BattleshipApp extends SimpleApplication implements BattleshipClient
      */
     private final ActionListener escapeListener = (name, isPressed, tpf) -> escape(isPressed);
 
+    /**
+     * The Object which handles the background music
+     */
+    private BackgroundMusic backgroundMusic;
+
     static {
         // Configure logging
         LogManager manager = LogManager.getLogManager();
@@ -225,6 +230,8 @@ public void simpleInitApp() {
         setupStates();
         setupGui();
         serverConnection.connect();
+
+        backgroundMusic = new BackgroundMusic(this, "Music/MainMenu/Dark_Intro.ogg");
     }
 
     /**
@@ -426,4 +433,13 @@ void errorDialog(String errorMessage) {
                      .build()
                      .open();
     }
+
+    /**
+     * this method returns the object which handles the background music
+     *
+     * @return BackgroundMusic
+     */
+    public BackgroundMusic getBackgroundMusic(){
+        return backgroundMusic;
+    }
 }

Projekte/battleship/client/src/main/java/pp/battleship/client/Menu.java

@@ -9,7 +9,10 @@
 
 import com.simsilica.lemur.Button;
 import com.simsilica.lemur.Checkbox;
+import com.simsilica.lemur.DefaultRangedValueModel;
 import com.simsilica.lemur.Label;
+import com.simsilica.lemur.Slider;
+import com.simsilica.lemur.core.VersionedReference;
 import com.simsilica.lemur.style.ElementId;
 import pp.dialog.Dialog;
 import pp.dialog.StateCheckboxModel;
@@ -34,6 +37,8 @@ class Menu extends Dialog {
     private final Button loadButton = new Button(lookup("menu.map.load"));
     private final Button saveButton = new Button(lookup("menu.map.save"));
 
+    private final VersionedReference<Double> volumeRef;
+
     /**
      * Constructs the Menu dialog for the Battleship application.
      *
@@ -45,6 +50,19 @@ public Menu(BattleshipApp app) {
         addChild(new Label(lookup("battleship.name"), new ElementId("header"))); //NON-NLS
         addChild(new Checkbox(lookup("menu.sound-enabled"),
                               new StateCheckboxModel(app, GameSound.class)));
+
+        Checkbox musicToggle = new Checkbox(lookup("menu.music.toggle"));
+        musicToggle.setChecked(app.getBackgroundMusic().isMusicEnabled());
+        musicToggle.addClickCommands(s -> toggleMusic());
+
+        addChild(musicToggle);
+
+        Slider volumeSlider = new Slider();
+        volumeSlider.setModel(new DefaultRangedValueModel(0.0 , 2.0, app.getBackgroundMusic().getVolume()));
+        addChild(volumeSlider);
+
+        volumeRef = volumeSlider.getModel().createReference();
+
         addChild(loadButton)
                 .addClickCommands(s -> ifTopDialog(this::loadDialog));
         addChild(saveButton)
@@ -56,6 +74,34 @@ public Menu(BattleshipApp app) {
         update();
     }
 
+    /**
+     * this method is used update the volume when there is a change in the slider
+     * @param tpf time per frame
+     */
+    @Override
+    public void update(float tpf){
+        if(volumeRef.update()){
+            double newVolume = volumeRef.get();
+            adjustVolume(newVolume);
+        }
+    }
+
+    /**
+     * this method adjust the volume for the background music
+     *
+     * @param volume is the double value of the volume
+     */
+    private void adjustVolume(double volume) {
+        app.getBackgroundMusic().setVolume((float) volume);
+    }
+
+    /**
+     * this method toggles the background music on and off
+     */
+    private void toggleMusic() {
+        app.getBackgroundMusic().toogleMusic();
+    }
+
     /**
      * Updates the state of the load and save buttons based on the game logic.
      */

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/SeaSynchronizer.java

@@ -144,18 +144,13 @@ public Spatial visit(Battleship ship) {
      * @return the spatial representing the battleship
      */
     private Spatial createShip(Battleship ship) {
-        switch (ship.getLength()){
+        return switch (ship.getLength()) {
-            case 1:
+            case 1 -> createPatrolBoat(ship);
-                return createPatrolBoat(ship);
+            case 2 -> createModernBattleship(ship);
-            case 2:
+            case 3 -> createUBoat(ship);
-                return createModernBattleship(ship);
+            case 4 -> createBattleship(ship);
-            case 3:
+            default -> throw new IllegalArgumentException("Ship length must be between 1 and 4 units long");
-                return createUBoat(ship);
+        };
-            case 4:
-                return createBattleship(ship);
-            default:
-                throw new IllegalArgumentException("Ship length must be between 1 and 4 units long");
-        }
     }
 
     /**
@@ -210,6 +205,12 @@ private Spatial createBattleship(Battleship ship) {
         return model;
     }
 
+    /**
+     * creates a detailed 3D model to represent an UBoat
+     *
+     * @param ship the ship to be represented
+     * @return the spatial representing the Uboat
+     */
     private Spatial createUBoat(Battleship ship) {
         final Spatial model = app.getAssetManager().loadModel(UBOAT);
 
@@ -221,6 +222,12 @@ private Spatial createUBoat(Battleship ship) {
         return model;
     }
 
+    /**
+     * creates a detailed 3D model to represent the modern battleship
+     *
+     * @param ship the ship to be represented
+     * @return the spatial representing the Modern Battleship
+     */
     private Spatial createModernBattleship(Battleship ship) {
         final Spatial model = app.getAssetManager().loadModel(BATTLE_SHIP_MODERN);
 
@@ -232,6 +239,12 @@ private Spatial createModernBattleship(Battleship ship) {
         return model;
     }
 
+    /**
+     * creates a detailed 3D model to represent the patrol boat
+     *
+     * @param ship the ship to be represented
+     * @return the spatial representing the patrol boat
+     */
     private Spatial createPatrolBoat(Battleship ship) {
         final Spatial model = app.getAssetManager().loadModel(PATROL_BOAT);
 

Projekte/battleship/model/src/main/resources/battleship.properties

@@ -31,6 +31,8 @@ menu.return-to-game=Return to game
 menu.sound-enabled=Sound switched on
 menu.map.load=Load map from file...
 menu.map.save=Save map in file...
+menu.music.toggle=Toggle the music
+menu.volume=Volume
 label.file=File:
 label.connecting=Connecting...
 dialog.error=Error

Projekte/battleship/model/src/main/resources/battleship_de.properties

@@ -31,6 +31,8 @@ menu.return-to-game=Zurück zum Spiel
 menu.sound-enabled=Sound eingeschaltet
 menu.map.load=Karte von Datei laden...
 menu.map.save=Karte in Datei speichern...
+menu.music.toggle=An/Ausschalten der Musik
+menu.volume=Lautstärke
 label.file=Datei:
 label.connecting=Verbindung wird aufgebaut...
 dialog.error=Fehler