Fixed image loading, added rendering, added JMenu

.classpath

@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
 	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="src" path="res"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
 		<attributes>
 			<attribute name="module" value="true"/>
 		</attributes>
 	</classpathentry>
+	<classpathentry kind="lib" path="res"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>

src/dev/kske/minesweeper/Board.java

@@ -1,12 +1,17 @@
 package dev.kske.minesweeper;
 
 import java.awt.Color;
+import java.awt.Font;
+import java.awt.FontMetrics;
 import java.awt.Graphics;
+import java.awt.Image;
 import java.awt.Point;
 import java.awt.Rectangle;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Random;
 
-import javax.swing.JFrame;
+import javax.swing.JPanel;
 
 /**
  * Project: <strong>Minesweeper</strong><br>
@@ -14,23 +19,34 @@ import javax.swing.JFrame;
  * Created: <strong>22.03.2019</strong><br>
  * Author: <strong>Kai S. K. Engelbart</strong>
  */
-public class Board {
+public class Board extends JPanel {
 
-	private int			tileSize, width, height;
+	private static final long	serialVersionUID	= -279269871397851420L;
+	private static final int	tileSize			= 32;
+
+	private static Map<String, Image> icons;
+
+	private int			width, height;
 	private Rectangle	screen;
 
 	private GameState	gameState;
 	private int			mines, activeTiles, flaggedTiles;
 	private Tile[][]	board;
 
-	private final JFrame viewport;
+	static {
+		icons = new HashMap<>();
+		final String[] names = { "mine2", "mine4", "tile", "tile3", "flag" };
+		for (String name : names) {
+			icons.put(name, TextureLoader.loadScaledImage(name, tileSize));
+		}
+	}
 
-	public Board(int x, int y, int width, int height, int tileSize, int mines, JFrame viewport) {
-		this.tileSize	= tileSize;
+	public Board(int x, int y, int width, int height, int mines) {
+		// Not using a layout manager
+		super(null);
 		this.width	= width;
 		this.height	= height;
 		screen		= new Rectangle(x, y, x + width * tileSize, y + height * tileSize);
-		this.viewport	= viewport;
 
 		gameState		= GameState.ACTIVE;
 		this.mines		= mines;
@@ -43,6 +59,56 @@ public class Board {
 				board[i][j] = new Tile();
 	}
 
+	@Override
+	public void paintComponent(Graphics g) {
+		super.paintComponent(g);
+		for (int i = 0; i < width; i++)
+			for (int j = 0; j < height; j++) {
+				Tile	tile	= board[i][j];
+				int		x		= screen.x + i * tileSize, y = screen.y + j * tileSize;
+
+				// Draw background with grid
+				g.setColor(Color.gray);
+				g.fillRect(x, y, x + tileSize, y + tileSize);
+				g.setColor(Color.black);
+				g.drawRect(x, y, x + tileSize, y + tileSize);
+
+				// Draw all mines when the game is won or lost
+				switch (gameState) {
+					case LOST:
+						// Draw tile with normal mine
+						g.drawImage(icons.get("mine2"), x, y, this);
+						break;
+					case WON:
+						// Draw tile with diffused mine
+						g.drawImage(icons.get("mine4"), x, y, this);
+						break;
+					default:
+						if (tile.isTouched()) {
+
+							// Draw tile with mine
+							if (tile.isMine()) g.drawImage(icons.get("mine2"), x, y, this);
+
+							// Draw flagged tile
+							else if (tile.isDrawSurroundingMines() && tile.getSurroundingMines() > 0) {
+								// Draw number of surrounding mines
+								String		numStr	= String.valueOf(tile.getSurroundingMines());
+								FontMetrics	fm		= g.getFontMetrics();
+								int			w		= fm.stringWidth(numStr), h = fm.getHeight();
+								g.setFont(new Font("Helvetica", Font.PLAIN, 12));
+								g.drawString(numStr, x + tileSize / 2 - w / 2, y + tileSize / 2 - h / 2);
+							}
+						}
+
+						// Draw flagged tile
+						else if (tile.isFlagged()) g.drawImage(icons.get("flag"), x, y, this);
+
+						// Draw normal tile
+						else g.drawImage(icons.get("tile"), x, y, this);
+				}
+			}
+	}
+
 	public Point getTilePos(int x, int y) {
 		return new Point((x - screen.x) / tileSize, (y - screen.y) / tileSize);
 	}
@@ -95,7 +161,7 @@ public class Board {
 				touchTile(i, j);
 
 			// Redraw the touched tile
-			drawTile(n, m);
+			repaint(n * tileSize, m * tileSize, (n + 1) * tileSize, (n + 1) * tileSize);
 		}
 	}
 
@@ -109,28 +175,7 @@ public class Board {
 				tile.setFlagged(true);
 				flaggedTiles++;
 			}
-			drawTile(n, m);
+			repaint(n * tileSize, m * tileSize, (n + 1) * tileSize, (n + 1) * tileSize);
 		}
 	}
-
-	public void draw() {
-		for(int i = 0; i < width; i++)
-			for (int j = 0; j < height; j++)
-				drawTile(i, j);
-	}
-
-	public void drawTile(int n, int m) {
-		Tile	tile	= board[n][m];
-		int		x		= screen.x + n * tileSize, y = screen.y + m * tileSize;
-		Graphics	g		= viewport.getGraphics();
-
-		// Draw background with grid
-		g.setColor(Color.gray);
-		g.fillRect(x, y, x + tileSize, y + tileSize);
-		g.setColor(Color.black);
-		g.drawRect(x, y, x + tileSize, y + tileSize);
-
-		// Draw all mines if the game is lost
-		// if(gameState == GameState.LOST)
-	}
 }

src/dev/kske/minesweeper/Minesweeper.java

@@ -1,8 +1,15 @@
 package dev.kske.minesweeper;
 
+import java.awt.BorderLayout;
 import java.awt.EventQueue;
+import java.awt.event.KeyEvent;
 
+import javax.swing.JButton;
 import javax.swing.JFrame;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.JOptionPane;
 
 /**
  * Project: <strong>Minesweeper</strong><br>
@@ -12,6 +19,8 @@ import javax.swing.JFrame;
  */
 public class Minesweeper {
 
+	private static final String VERSION = "1.0 JE";
+
 	private JFrame mframe;
 
 	private Board board;
@@ -50,8 +59,44 @@ public class Minesweeper {
 		mframe.setBounds(100, 100, 450, 300);
 		mframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
-		board = new Board(0, 0, 10, 10, 32, 10, mframe);
-		board.draw();
+		createMenuBar();
+
+		board = new Board(0, 0, 10, 10, 10);
+		mframe.getContentPane().add(board);
+
+		JButton btnRestart = new JButton("Restart");
+		mframe.getContentPane().add(btnRestart, BorderLayout.NORTH);
 	}
 
+	private void createMenuBar() {
+		var menubar = new JMenuBar();
+
+		var gameMenu = new JMenu("Game");
+		var	aboutMenuItem	= new JMenuItem("About");
+
+		var	easyMenuItem	= new JMenuItem("Easy");
+		var	mediumMenuItem	= new JMenuItem("Medium");
+		var	hardMenuItem	= new JMenuItem("Hard");
+		var	customMenuItem	= new JMenuItem("Custom");
+
+		gameMenu.setMnemonic(KeyEvent.VK_G);
+		easyMenuItem.setMnemonic(KeyEvent.VK_E);
+		mediumMenuItem.setMnemonic(KeyEvent.VK_M);
+		hardMenuItem.setMnemonic(KeyEvent.VK_H);
+		customMenuItem.setMnemonic(KeyEvent.VK_C);
+
+		aboutMenuItem.addActionListener((event) -> {
+			JOptionPane.showMessageDialog(board, "Minesweeper version " + VERSION + "\nby Kai S. K. Engelbart");
+		});
+		
+		gameMenu.add(easyMenuItem);
+		gameMenu.add(mediumMenuItem);
+		gameMenu.add(hardMenuItem);
+		gameMenu.addSeparator();
+		gameMenu.add(customMenuItem);
+		menubar.add(gameMenu);
+		menubar.add(aboutMenuItem);
+
+		mframe.setJMenuBar(menubar);
+	}
 }

src/dev/kske/minesweeper/TextureLoader.java

@@ -0,0 +1,38 @@
+package dev.kske.minesweeper;
+
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+
+import javax.imageio.ImageIO;
+
+/**
+ * Project: <strong>Minesweeper</strong><br>
+ * File: <strong>TextureLoader.java</strong><br>
+ * Created: <strong>25.03.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public class TextureLoader {
+
+	private TextureLoader() {}
+
+	/**
+	 * Loads an image from the resource folder and scales it to a square.
+	 * 
+	 * @param name  The name of the file without the PNG extension in the resource
+	 *              folder
+	 * @param scale The side length of the square to which the image will be scaled
+	 * @return The scaled image
+	 */
+	public static Image loadScaledImage(String name, int scale) {
+		BufferedImage in = null;
+		try {
+			in = ImageIO.read(new File("res" + File.separator + name + ".png"));
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		Image scaled = in.getScaledInstance(scale, scale, Image.SCALE_SMOOTH);
+		return scaled;
+	}
+}

src/dev/kske/minesweeper/Tile.java

@@ -1,13 +1,5 @@
 package dev.kske.minesweeper;
 
-import java.awt.image.BufferedImage;
-import java.io.IOException;
-import java.net.URL;
-import java.util.HashMap;
-import java.util.Map;
-
-import javax.imageio.ImageIO;
-
 /**
  * Project: <strong>Minesweeper</strong><br>
  * File: <strong>Tile.java</strong><br>
@@ -16,27 +8,11 @@ import javax.imageio.ImageIO;
  */
 public class Tile {
 
-	private static Map<String, BufferedImage> icons;
-
 	private boolean mine, flagged, touched;
 
 	private boolean	drawSurroundingMines;
 	private int		surroundingMines;
 
-	static {
-		icons = new HashMap<>();
-		final String[] names = { "Mine2", "Mine4", "Tile", "Tile3" };
-		for (String name : names) {
-			URL file = Tile.class.getResource(name + ".ico");
-			try {
-				icons.put(name, ImageIO.read(file));
-			} catch (IOException e) {
-				System.err.println("Error loading texture: " + name);
-				e.printStackTrace();
-			}
-		}
-	}
-
 	public Tile() {
 		mine = flagged = touched = drawSurroundingMines = false;