Implement PuzzleView class

src/main/java/me/taako/swt/prog2/view/PuzzleView.java

@@ -1,4 +1,75 @@
 package me.taako.swt.prog2.view;
 
-public class PuzzleView {
+import me.taako.swt.prog2.model.PuzzleModel;
+
+import javax.swing.*;
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.IntStream;
+
+public class PuzzleView extends JFrame {
+    private final List<JButton> buttons = new ArrayList<>();
+    private final PuzzleModel model;
+
+    public PuzzleView(PuzzleModel model) {
+        this.model = model;
+        int gridSize = (int) Math.sqrt(model.getSize());
+
+        setLayout(new GridLayout(gridSize, gridSize, 5, 5));
+        initButtons();
+        setupWindow();
+    }
+
+    private void setupWindow() {
+        setTitle("Schiebe-Puzzle");
+        setSize(400, 400);
+        setDefaultCloseOperation(EXIT_ON_CLOSE);
+        setVisible(true);
+    }
+
+    private void initButtons() {
+        int size = model.getSize();
+        IntStream.range(0, size)
+                .forEach(i -> {
+                    JButton button = createButton();
+                    buttons.add(button);
+                    add(button);
+                });
+
+        update();
+    }
+
+    private JButton createButton() {
+        JButton button = new JButton();
+        button.setOpaque(true);
+        button.setBorderPainted(false);
+        return button;
+    }
+
+    public List<JButton> getButtons() {
+        return buttons;
+    }
+
+    public void update() {
+        int size = model.getSize();
+        Color correctColor = Color.GREEN;
+        Color incorrectColor = Color.ORANGE;
+
+        IntStream.range(0, size)
+                .forEach(i -> {
+                    JButton button = buttons.get(i);
+                    int tile = model.getTile(i);
+
+                    if (tile != size - 1) {
+                        button.setText(String.valueOf(tile + 1));
+                        button.setBackground(model.isTileCorrect(i)
+                                ? correctColor
+                                : incorrectColor);
+                    } else {
+                        button.setText("");
+                        button.setBackground(null);
+                    }
+                });
+    }
 }