Optimized BoardPanel and texture loading

- Renamed TextureLoader to TextureUtil
- Moved entire texture handling to TextureUtil

src/dev/kske/chess/BoardPanel.java

@@ -3,22 +3,17 @@ package dev.kske.chess;
 import java.awt.Color;
 import java.awt.Dimension;
 import java.awt.Graphics;
-import java.awt.Image;
 import java.awt.Point;
 import java.awt.event.ComponentAdapter;
 import java.awt.event.ComponentEvent;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
-import java.io.File;
-import java.util.HashMap;
-import java.util.Map;
 
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 
 import dev.kske.chess.event.GameEvent;
 import dev.kske.chess.event.GameEventListener;
-import dev.kske.chess.piece.Piece;
 
 /**
  * Project: <strong>Chess</strong><br>
@@ -34,17 +29,12 @@ public class BoardPanel extends JPanel implements GameEventListener {
 
 	private static final long serialVersionUID = 6771148331334310216L;
 
-	private static int tileSize;
+	private int		tileSize;
-
-	private static Map<String, Image> textures;
-
 	private Board	board;
 
 	public BoardPanel(Board board) {
 		this();
-		setSize(getPreferredSize());
 		setBoard(board);
-		if (textures == null) loadPieceTextures();
 	}
 
 	public BoardPanel() {
@@ -58,10 +48,12 @@ public class BoardPanel extends JPanel implements GameEventListener {
 			@Override
 			public void componentResized(ComponentEvent e) {
 				tileSize = getWidth() / 8;
-				scalePieceTextures();
+				TextureUtil.scalePieceTextures(tileSize);
 			}
 		});
 
+		setSize(getPreferredSize());
+
 		// Add a mouse adapter for testing piece movement
 		addMouseListener(new MouseAdapter() {
 
@@ -95,8 +87,8 @@ public class BoardPanel extends JPanel implements GameEventListener {
 		// Draw the pieces if a board is present
 		if (board != null) for (int i = 0; i < 8; i++)
 			for (int j = 0; j < 8; j++)
-				if (board.getBoardArr()[i][j] != null)
+				if (board.getBoardArr()[i][j] != null) g.drawImage(TextureUtil
-					g.drawImage(getPieceTexture(board.getBoardArr()[i][j]), i * tileSize, j * tileSize, this);
+					.getPieceTexture(board.getBoardArr()[i][j]), i * tileSize, j * tileSize, this);
 	}
 
 	@Override
@@ -116,36 +108,6 @@ public class BoardPanel extends JPanel implements GameEventListener {
 		repaint();
 	}
 
-	/**
-	 * Load every PNG file inside the res/pieces directory.
-	 * The filenames without extensions are used as keys in the map textures.
-	 */
-	private static void loadPieceTextures() {
-		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));
-	}
-
-	/**
-	 * Scales all piece textures to fit the current tile size
-	 */
-	private static void scalePieceTextures() {
-		textures.replaceAll((key, img) -> img.getScaledInstance(tileSize, tileSize, Image.SCALE_SMOOTH));
-	}
-
-	/**
-	 * Loads a piece texture fitting to a piece object
-	 * 
-	 * @param piece The piece from which the texture properties are taken
-	 * @return The fitting texture
-	 */
-	private static Image getPieceTexture(Piece piece) {
-		String key = piece.getType().toString().toLowerCase() + "_" + piece.getColor().toString().toLowerCase();
-		return textures.get(key);
-	}
-
 	@Override
 	public Dimension getMinimumSize() { return getPreferredSize(); }
 

src/dev/kske/chess/TextureLoader.java

@@ -1,35 +0,0 @@
-package dev.kske.chess;
-
-import java.awt.Image;
-import java.awt.image.BufferedImage;
-import java.io.File;
-import java.io.IOException;
-
-import javax.imageio.ImageIO;
-
-/**
- * Project: <strong>Chess</strong><br>
- * File: <strong>TextureLoader.java</strong><br>
- * Created: <strong>01.07.2019</strong><br>
- * Author: <strong>Kai S. K. Engelbart</strong>
- */
-public class TextureLoader {
-
-	private TextureLoader() {}
-
-	/**
-	 * Loads an image from a file.
-	 * 
-	 * @param file The image file
-	 * @return The loaded image
-	 */
-	public static Image loadScaledImage(File file, int scale) {
-		BufferedImage in = null;
-		try {
-			in = ImageIO.read(file);
-		} catch (IOException e) {
-			e.printStackTrace();
-		}
-		return in;
-	}
-}

src/dev/kske/chess/TextureUtil.java

@@ -0,0 +1,76 @@
+package dev.kske.chess;
+
+import java.awt.Image;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.imageio.ImageIO;
+
+import dev.kske.chess.piece.Piece;
+
+/**
+ * Project: <strong>Chess</strong><br>
+ * File: <strong>TextureUtil.java</strong><br>
+ * Created: <strong>01.07.2019</strong><br>
+ * Author: <strong>Kai S. K. Engelbart</strong>
+ */
+public class TextureUtil {
+
+	private static Map<String, Image> textures;
+
+	static {
+		textures = new HashMap<>();
+		loadPieceTextures();
+	}
+
+	private TextureUtil() {}
+
+	/**
+	 * Loads a piece texture fitting to a piece object
+	 * 
+	 * @param piece The piece from which the texture properties are taken
+	 * @return The fitting texture
+	 */
+	public static Image getPieceTexture(Piece piece) {
+		String key = piece.getType().toString().toLowerCase() + "_" + piece.getColor().toString().toLowerCase();
+		return textures.get(key);
+	}
+
+	/**
+	 * Scales all piece textures to fit the current tile size
+	 */
+	public static void scalePieceTextures(int scale) {
+		textures.replaceAll((key, img) -> img.getScaledInstance(scale, scale, Image.SCALE_SMOOTH));
+	}
+
+	/**
+	 * Loads an image from a file.
+	 * 
+	 * @param file The image file
+	 * @return The loaded image
+	 */
+	private static Image loadImage(File file) {
+		BufferedImage in = null;
+		try {
+			in = ImageIO.read(file);
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		return in;
+	}
+
+	/**
+	 * Load every PNG file inside the res/pieces directory.
+	 * The filenames without extensions are used as keys in the map textures.
+	 */
+	private static void loadPieceTextures() {
+		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("[.][^.]+$", ""), TextureUtil.loadImage(file));
+	}
+
+}