--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Ristipolku.java	Wed Jan 26 03:43:17 2011 +0200
@@ -0,0 +1,87 @@
+/*
+ * Ristipolku
+ * (C) Copyright 2011 Matti 'ccr' Hämäläinen <ccr@tnsp.org>
+ *
+ * Ohjelmointiprojekti Java-kurssille.
+ *
+ */
+import java.awt.*;
+import java.awt.geom.*;
+import java.awt.font.TextLayout;
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowListener;
+import java.awt.event.WindowAdapter;
+import java.awt.image.BufferedImage;
+import javax.swing.*;
+
+
+public class RistiPolku extends JApplet implements Runnable
+{
+
+    public Graphics2D createGraphics2D(Dimension d) {
+        Graphics2D g2 = null;
+
+        if (bimg == null || bimg.getWidth() != d.w || bimg.getHeight() != d.h) {
+            bimg = (BufferedImage) createImage(d.w, d.h);
+            reset(d);
+        } 
+
+        g2 = bimg.createGraphics();
+        g2.setBackground(getBackground());
+        g2.clearRect(0, 0, w, h);
+        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
+                            RenderingHints.VALUE_ANTIALIAS_ON);
+        return g2;
+    }
+
+
+    public void paint(Graphics g) {
+	Dimension d = getSize();
+        step(d.width, d.height);
+        Graphics2D g2 = createGraphics2D(d);
+        drawDemo(d.width, d.height, g2);
+        g2.dispose();
+        g.drawImage(bimg, 0, 0, this);
+    }
+
+
+    public void start() {
+        thread = new Thread(this);
+        thread.setPriority(Thread.MIN_PRIORITY);
+        thread.start();
+    }
+
+
+    public synchronized void stop() {
+        thread = null;
+    }
+
+
+    public void run() {
+        Thread me = Thread.currentThread();
+        while (thread == me) {
+            repaint();
+            try {
+                thread.sleep(10);
+            } catch (InterruptedException e) { break; }
+        }
+        thread = null;
+    }
+
+
+    public static void main(String argv[]) {
+        final RistiPolku demo = new RistiPolku();
+        demo.init();
+        JFrame f = new JFrame("RistiPolku");
+        f.addWindowListener(new WindowAdapter() {
+            public void windowClosing(WindowEvent e) {System.exit(0);}
+            public void windowDeiconified(WindowEvent e) { demo.start(); }
+            public void windowIconified(WindowEvent e) { demo.stop(); }
+        });
+        f.getContentPane().add("Center", demo);
+        f.pack();
+        f.setSize(new Dimension(400,300));
+        f.show();
+        demo.start();
+    }
+}