Plumb in high scores

core/src/com/me/pacman/Assets.java

@@ -18,6 +18,7 @@ public class Assets {
     private Texture levelBackground;
     private Texture levelWinBackground;
     private Texture menuBackground;
+    private Texture highScoresBackground;
 
     public TextureRegion[][] font;
     public TextureRegion[][] level;
@@ -44,6 +45,7 @@ public class Assets {
         manager.load("level_background.png", Texture.class);
         manager.load("level_background_win.png", Texture.class);
         manager.load("menu_background.png", Texture.class);
+        manager.load("high_scores_background.png", Texture.class);
         manager.load("logo.png", Texture.class);
 
         manager.load("sprites/font.png", Texture.class);
@@ -75,6 +77,7 @@ public class Assets {
         levelBackground = manager.get("level_background.png", Texture.class);
         levelWinBackground = manager.get("level_background_win.png", Texture.class);
         menuBackground = manager.get("menu_background.png", Texture.class);
+        highScoresBackground = manager.get("high_scores_background.png", Texture.class);
 
         // cache our texture regions
         font = TextureRegion.split(manager.get("sprites/font.png", Texture.class), 8, 8);
@@ -114,6 +117,8 @@ public class Assets {
         return menuBackground;
     }
 
+    public Texture getHighScoresBackground() { return highScoresBackground; }
+
     public Texture getLogo() {
         return manager.get("logo.png", Texture.class);
     }

core/src/com/me/pacman/FontRenderer.java

@@ -7,8 +7,8 @@ import com.badlogic.gdx.graphics.g2d.TextureRegion;
 public class FontRenderer {
 
 
-    private static final char[] CHARS = "abcdefghijklmnopqrstuvwxyz0123456789!?()[]<>$&*:#^~-_/\\".toCharArray();
-    private static final int[] CHAR_TO_INDEX = new int[256];
+    public static final char[] CHARS = "abcdefghijklmnopqrstuvwxyz0123456789!?()[]<>$&*:#^~-_/\\".toCharArray();
+    public static final int[] CHAR_TO_INDEX = new int[256];
     private Color color = Color.WHITE;
 
     private TextureRegion[][] sprites;

core/src/com/me/pacman/HighScores.java

@@ -0,0 +1,67 @@
+package com.me.pacman;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.files.FileHandle;
+import com.badlogic.gdx.utils.Array;
+
+/**
+ * A simple class for retrieving and saving high scores to persistent storage.
+ *
+ * Scores are saved in a simple text file
+ */
+public class HighScores {
+
+    public static final String FILE = "scores.dat";
+
+    private FileHandle file;
+
+    private Array<Score> scores = new Array<>(10);
+
+    public HighScores() {
+        file = Gdx.files.local(FILE);
+        loadScores();
+    }
+
+    private void loadScores() {
+        if (!file.exists()) {
+            return;
+        }
+
+        String data = file.readString();
+        String[] lines = data.split("\n");
+
+        for (String line : lines) {
+            String[] parts = line.split("\t");
+            scores.add(new Score(parts[0], Integer.parseInt(parts[1])));
+        }
+    }
+
+    private void saveScores() {
+        for (int i = 0; i < scores.size; i++) {
+            Score score = scores.get(i);
+            boolean append = i > 0;
+            file.writeString(String.format("%s\t%d\n", score.scorer, score.score), append);
+        }
+    }
+
+    private void sortScores() {
+        scores.sort(Score.SCORE_SORTER);
+    }
+
+    public Score getCurrentHighScore() {
+        return scores.size > 0 ? scores.get(0) : null;
+    }
+
+    public Score[] getHighScores(int count) {
+        Score[] ret = new Score[Math.min(count, scores.size)];
+        System.arraycopy(scores.items, 0, ret, 0, ret.length);
+        return ret;
+    }
+
+    public void addScore(Score score) {
+        scores.add(score);
+        sortScores();
+        saveScores();
+    }
+
+}

core/src/com/me/pacman/PacDude.java

@@ -2,12 +2,15 @@ package com.me.pacman;
 
 import com.badlogic.gdx.Game;
 import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.Screen;
 import com.badlogic.gdx.graphics.GL20;
 import com.badlogic.gdx.graphics.OrthographicCamera;
 import com.badlogic.gdx.graphics.g2d.SpriteBatch;
 import com.badlogic.gdx.utils.viewport.FitViewport;
 import com.badlogic.gdx.utils.viewport.Viewport;
+import com.me.pacman.state.HighScoresState;
 import com.me.pacman.state.MenuState;
+import com.me.pacman.state.State;
 
 public class PacDude extends Game {
 
@@ -19,6 +22,8 @@ public class PacDude extends Game {
 	public static final int LEVEL_WIDTH = 224;
 	public static final int LEVEL_HEIGHT = 288;
 
+	public HighScores highScores;
+
 	public Assets assets;
 	public Sound sound;
 
@@ -28,12 +33,16 @@ public class PacDude extends Game {
 	public OrthographicCamera cam;
 	public Viewport viewport;
 
+	private State nextState;
+
 	@Override
 	public void create () {
 		cam = new OrthographicCamera();
 		viewport = new FitViewport(LEVEL_WIDTH, LEVEL_HEIGHT, cam);
 		viewport.apply(true);
 
+		highScores = new HighScores();
+
 		assets = new Assets();
 		assets.loadAssets();
 		sound = new Sound(this);
@@ -42,13 +51,21 @@ public class PacDude extends Game {
 		fontRenderer = new FontRenderer(assets.font);
 
 		Gdx.gl.glClearColor(0, 0, 0, 1);
-		setScreen(new MenuState(this));
+		setNextState(new MenuState(this));
 	}
 
 	@Override
 	public void render () {
 		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
 
+		if (nextState != null) {
+			Screen currScreen = getScreen();
+			if (currScreen != null) currScreen.dispose();
+			nextState.setup();
+			super.setScreen(nextState);
+			nextState = null;
+		}
+
 		batch.begin();
 		if (DEBUG) {
 			fontRenderer.draw(batch, "fps:" + Gdx.graphics.getFramesPerSecond(), 19 * 8, 34 * 8);
@@ -71,4 +88,14 @@ public class PacDude extends Game {
 		batch.dispose();
 		assets.dispose();
 	}
+
+	@Override
+	public void setScreen(Screen screen) {
+		throw new IllegalStateException("Use setNextState instead.");
+	}
+
+	public void setNextState(State state) {
+		this.nextState = state;
+	}
+
 }

core/src/com/me/pacman/Score.java

@@ -0,0 +1,22 @@
+package com.me.pacman;
+
+import java.util.Comparator;
+
+public final class Score {
+
+    public String scorer;
+    public int score;
+
+    public static final Comparator<Score> SCORE_SORTER = new Comparator<Score>() {
+        @Override
+        public int compare(Score a, Score b) {
+        return a.score < b.score? 1 : (a.score == b.score ? 0 : -1);
+        }
+    };
+
+    public Score(String scorer, int score) {
+        this.scorer = scorer;
+        this.score = score;
+    }
+
+}

core/src/com/me/pacman/state/HighScoreEntryState.java

@@ -0,0 +1,124 @@
+package com.me.pacman.state;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.Input;
+import com.badlogic.gdx.InputAdapter;
+import com.badlogic.gdx.graphics.Color;
+import com.badlogic.gdx.graphics.Texture;
+import com.me.pacman.FontRenderer;
+import com.me.pacman.Score;
+import com.me.pacman.PacDude;
+
+public class HighScoreEntryState extends State {
+
+    private Texture background;
+    private Score score;
+
+    private int currLetter;
+    private char[] name;
+
+    private boolean flash;
+    private float elapsed;
+
+    public HighScoreEntryState(PacDude game, Score score) {
+        super(game);
+        this.score = score;
+        this.currLetter = 0;
+        this.flash = false;
+        this.elapsed = 0f;
+        this.name = score.scorer.toCharArray();
+    }
+
+    @Override
+    public void setup() {
+        this.background = game.assets.getHighScoresBackground();
+        Gdx.input.setInputProcessor(this.new Controller());
+    }
+
+    @Override
+    public void render() {
+        game.batch.draw(background, 0, 16);
+
+        game.fontRenderer.setColor(Color.YELLOW);
+        game.fontRenderer.draw(game.batch, "high scores", (8 * 8) + 4, 25 * 8);
+
+        game.fontRenderer.setColor(Color.CHARTREUSE);
+        game.fontRenderer.draw(game.batch, "score  name", (8 * 8) + 4, 23 * 8);
+
+
+        game.fontRenderer.setColor(Color.BLUE);
+        game.fontRenderer.draw(game.batch, "" + score.score, (8 * 8) + 4, 18 * 9);
+        for (int i = 0; i < 3; i++) {
+            game.fontRenderer.draw(game.batch, String.valueOf((i == currLetter && flash)? '_' : name[i]), (16 + i) * 8 + 4, 18 * 9);
+        }
+
+        game.fontRenderer.setColor(Color.WHITE);
+        Score[] scores = game.highScores.getHighScores(9);
+        for (int i = 0; i < scores.length; i++) {
+            Score score = scores[i];
+            game.fontRenderer.draw(game.batch, String.format("%-8d%s", score.score, score.scorer), (8 * 8) + 4, (16 - i) * 9);
+        }
+    }
+
+    @Override
+    public void update(float dt) {
+        elapsed += dt;
+        if (elapsed >= 1/3f) {
+            elapsed = 0f;
+            flash = !flash;
+        }
+    }
+
+    @Override
+    public void dispose() {
+        Gdx.input.setInputProcessor(null);
+    }
+
+    private final class Controller extends InputAdapter {
+
+        @Override
+        public boolean keyDown(int keycode) {
+            switch(keycode) {
+                case Input.Keys.DOWN:
+                    int nextIndex = FontRenderer.CHAR_TO_INDEX[name[currLetter]] - 1;
+                    if (nextIndex < 0) {
+                        nextIndex = 25;
+                    }
+                    flash = false;
+                    name[currLetter] = FontRenderer.CHARS[nextIndex];
+                    break;
+                case Input.Keys.UP:
+                    nextIndex = FontRenderer.CHAR_TO_INDEX[name[currLetter]] + 1;
+                    if (nextIndex > 25) {
+                        nextIndex = 0;
+                    }
+                    flash = false;
+                    name[currLetter] = FontRenderer.CHARS[nextIndex];
+                    break;
+                case Input.Keys.RIGHT:
+                    currLetter++;
+                    if (currLetter > 2) {
+                        currLetter = 0;
+                    }
+                    flash = true;
+                    break;
+                case Input.Keys.LEFT:
+                    currLetter--;
+                    if (currLetter < 0) {
+                        currLetter = 2;
+                    }
+                    flash = true;
+                    break;
+                case Input.Keys.ENTER:
+                    score.scorer = String.valueOf(name);
+                    game.highScores.addScore(score);
+                    game.setNextState(new HighScoresState(game));
+                    break;
+            }
+            elapsed = 0f;
+            return super.keyDown(keycode);
+        }
+
+    }
+
+}

core/src/com/me/pacman/state/HighScoresState.java

@@ -0,0 +1,67 @@
+package com.me.pacman.state;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.Input;
+import com.badlogic.gdx.InputAdapter;
+import com.badlogic.gdx.graphics.Color;
+import com.badlogic.gdx.graphics.Texture;
+import com.me.pacman.PacDude;
+import com.me.pacman.Score;
+
+public class HighScoresState extends State {
+
+
+    private Texture background;
+
+    public HighScoresState(PacDude game) {
+        super(game);
+    }
+
+    @Override
+    public void setup() {
+        this.background = game.assets.getHighScoresBackground();
+        Gdx.input.setInputProcessor(this.new Controller());
+    }
+
+    @Override
+    public void render() {
+        game.batch.draw(background, 0, 16);
+
+        game.fontRenderer.setColor(Color.YELLOW);
+        game.fontRenderer.draw(game.batch, "high scores", (8 * 8) + 4, 25 * 8);
+
+        game.fontRenderer.setColor(Color.CHARTREUSE);
+        game.fontRenderer.draw(game.batch, "score  name", (8 * 8) + 4, 23 * 8);
+
+        game.fontRenderer.setColor(Color.WHITE);
+        Score[] scores = game.highScores.getHighScores(10);
+        for (int i = 0; i < scores.length; i++) {
+            Score score = scores[i];
+            game.fontRenderer.draw(game.batch, String.format("%-8d%s", score.score, score.scorer), (8 * 8) + 4, (17 - i) * 9);
+        }
+    }
+
+    @Override
+    public void dispose() {
+        Gdx.input.setInputProcessor(null);
+    }
+
+    @Override
+    public void update(float dt) {}
+
+    private final class Controller extends InputAdapter {
+
+        @Override
+        public boolean keyDown(int keycode) {
+            switch(keycode) {
+                case Input.Keys.ENTER:
+                case Input.Keys.ESCAPE:
+                    game.setNextState(new MenuState(game));
+                    break;
+            }
+            return super.keyDown(keycode);
+        }
+
+    }
+
+}

core/src/com/me/pacman/state/MenuState.java

@@ -11,7 +11,7 @@ import com.me.pacman.Sound;
 
 public class MenuState extends LevelState {
 
-    private Texture levelBackground;
+    private Texture background;
     private Texture logo;
 
 
@@ -29,7 +29,7 @@ public class MenuState extends LevelState {
 
     @Override
     public void setup() {
-        levelBackground = game.assets.getMenuBackground();
+        background = game.assets.getMenuBackground();
         logo = game.assets.getLogo();
         logo.setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear);
 
@@ -48,7 +48,7 @@ public class MenuState extends LevelState {
 
     @Override
     public void render() {
-        game.batch.draw(levelBackground, 0, 16);
+        game.batch.draw(background, 0, 16);
         game.batch.draw(logo, 0, 140, 224, 120);
 
 
@@ -80,10 +80,10 @@ public class MenuState extends LevelState {
                 case Input.Keys.ENTER:
                     switch (selectedOption) {
                         case NEW_GAME:
-                            game.setScreen(new PlayState(game));
+                            game.setNextState(new PlayState(game));
                             break;
                         case HIGH_SCORES:
-//                            game.setScreen(new HighScores(game));
+                            game.setNextState(new HighScoresState(game));
                             break;
                     }
                     break;
@@ -106,9 +106,9 @@ public class MenuState extends LevelState {
         public boolean touchUp(int screenX, int screenY, int pointer, int button) {
             Vector2 coords = game.viewport.unproject(new Vector2(screenX, screenY));
             if (selectedOption == 0 && NEW_GAME_BOX.contains(coords)) {
-                game.setScreen(new PlayState(game));
+                game.setNextState(new PlayState(game));
             } else if (selectedOption == 1 && HIGH_SCORE_BOX.contains(coords)) {
-                selectedOption = -1;
+                game.setNextState(new HighScoresState(game));
             } else {
                 selectedOption = -1;
             }

core/src/com/me/pacman/state/State.java

@@ -10,7 +10,6 @@ public abstract class State extends ScreenAdapter {
 
     public State(PacDude game) {
         this.game = game;
-        this.setup();
     }
 
     @Override