Preparing board implementation and rendering

+ Board class as data model
+ Texture loading code in BoardPanel
+ Abstract Piece class with Type enum
- Moved piece textures into res/pieces
- Changes TextureLoader to work directly with files

src/dev/kske/chess/Board.java

@@ -0,0 +1,25 @@
+package dev.kske.chess;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>Board.java</strong><br>
+ * Created: <strong>01.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public class Board {
+
+	private Piece[][] boardArr;
+
+	public Board() {
+		initializeDefaultPositions();
+	}
+
+	private void initializeDefaultPositions() {
+
+	}
+
+	/**
+	 * @return the board array
+	 */
+	public Piece[][] getBoardArr() { return boardArr; }
+}

src/dev/kske/chess/BoardPanel.java

@@ -4,8 +4,12 @@ import java.awt.Color;
 import java.awt.Container;
 import java.awt.Dimension;
 import java.awt.Graphics;
+import java.awt.Image;
 import java.awt.event.ComponentAdapter;
 import java.awt.event.ComponentEvent;
+import java.io.File;
+import java.util.HashMap;
+import java.util.Map;
 
 import javax.swing.JPanel;
 
@@ -23,15 +27,31 @@ public class BoardPanel extends JPanel {
 
 	private static final long serialVersionUID = 6771148331334310216L;
 
-	private int tileSize;
+	private static int tileSize;
+
+	private static Map<String, Image> textures;
+
+	private Board board;
+
+	public BoardPanel(Board board) {
+		this();
+		setBoard(board);
+	}
 
 	public BoardPanel() {
-		// Add a component listener for adjusting the tile size on resizing
+		/*
+		 * Add a component listener for adjusting the tile size on resizing.
+		 * The size of the board is assumed to be 8x8, as well as the both the board and
+		 * the tiles being square.
+		 */
 		addComponentListener(new ComponentAdapter() {
 
 			@Override
 			public void componentResized(ComponentEvent e) {
 				tileSize = getWidth() / 8;
+
+				// Load the piece textures if they are not present
+				if (textures == null) loadPieceTextures();
 			}
 		});
 	}
@@ -47,6 +67,18 @@ public class BoardPanel extends JPanel {
 			}
 	}
 
+	private static void loadPieceTextures() {
+		/*
+		 * Load every PNG file inside the res/pieces directory.
+		 * The filenames without extensions are used as keys in the map.
+		 */
+		textures = new HashMap<>();
+		File	dir		= new File("res/pieces");
+		File[]	files	= dir.listFiles((File parentDir, String name) -> name.toLowerCase().endsWith(".png"));
+		for (File file : files)
+			textures.put(file.getName().replaceFirst("[.][^.]+$", ""), TextureLoader.loadScaledImage(file, tileSize));
+	}
+
 	@Override
 	public Dimension getMinimumSize() { return getPreferredSize(); }
 
@@ -64,4 +96,8 @@ public class BoardPanel extends JPanel {
 		int	s	= Math.max(w, h);
 		return new Dimension(s, s);
 	}
+
+	public Board getBoard() { return board; }
+
+	public void setBoard(Board board) { this.board = board; }
 }

src/dev/kske/chess/Piece.java

@@ -0,0 +1,16 @@
+package dev.kske.chess;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>Piece.java</strong><br>
+ * Created: <strong>01.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public abstract class Piece {
+
+	public abstract Type getType();
+
+	public static enum Type {
+		KING, QUEEN, ROOK, KNIGHT, BISHOP, PAWN;
+	}
+}

src/dev/kske/chess/TextureLoader.java

@@ -18,17 +18,16 @@ public class TextureLoader {
 	private TextureLoader() {}
 
 	/**
-	 * Loads an image from the resource folder and scales it to a square.
+	 * Loads an image from a file and scales it to a square.
 	 * 
-	 * @param name  The name of the file without the PNG extension in the resource
-	 *              folder
+	 * @param file  The image file
 	 * @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) {
+	public static Image loadScaledImage(File file, int scale) {
 		BufferedImage in = null;
 		try {
-			in = ImageIO.read(new File("res" + File.separator + name + ".png"));
+			in = ImageIO.read(file);
 		} catch (IOException e) {
 			e.printStackTrace();
 		}