[WIP] Port of Simon Tatham's Puzzle Collectionpuzzles

Original revision: 5123b1bf68777ffa86e651f178046b26a87cf2d9

MIT Licensed. Some games still crash and others are unplayable due to
issues with controls. Still need a "real" polygon filling algorithm.

The following games are at least partially broken for various reasons:

Cube:     crash with certain settings
Galaxies: crash
Inertia:  crash
Keen:     input issues
Loopy:    weird stuff happens
Map:      crash on input
Mines:    weird stuff happens on target
Palisade: input issues
Signpost: crash on input
Solo:     input issues
Towers:   input and drawing issues
Train Tracks: drawing issues
Twiddle:  weird animation on target
Undead:   input and drawing issues
Unequal:  input and drawing issues
Untangle: input issues

All in all, about 40% of the games are at least partially broken.

Change-Id: I7c69b6860ab115f973c8d76799502e9bb3d52368

1 files changed, 617 insertions, 0 deletions

diff --git a/apps/plugins/puzzles/PuzzleApplet.java b/apps/plugins/puzzles/PuzzleApplet.java
new file mode 100644
index 0000000..0b0648c
--- /dev/null
+++ b/apps/plugins/puzzles/PuzzleApplet.java
@@ -0,0 +1,617 @@
+/*
+ * PuzzleApplet.java: NestedVM applet for the puzzle collection
+ */
+import java.awt.*;
+import java.awt.event.*;
+import java.awt.image.BufferedImage;
+import java.util.*;
+import javax.swing.*;
+import javax.swing.border.BevelBorder;
+import javax.swing.Timer;
+import java.util.List;
+
+import org.ibex.nestedvm.Runtime;
+
+public class PuzzleApplet extends JApplet implements Runtime.CallJavaCB {
+
+    private static final long serialVersionUID = 1L;
+
+    private static final int CFG_SETTINGS = 0, CFG_SEED = 1, CFG_DESC = 2,
+            LEFT_BUTTON = 0x0200, MIDDLE_BUTTON = 0x201, RIGHT_BUTTON = 0x202,
+            LEFT_DRAG = 0x203, MIDDLE_DRAG = 0x204, RIGHT_DRAG = 0x205,
+            LEFT_RELEASE = 0x206, CURSOR_UP = 0x209, CURSOR_DOWN = 0x20a,
+            CURSOR_LEFT = 0x20b, CURSOR_RIGHT = 0x20c, MOD_CTRL = 0x1000,
+            MOD_SHFT = 0x2000, MOD_NUM_KEYPAD = 0x4000, ALIGN_VCENTRE = 0x100,
+            ALIGN_HCENTRE = 0x001, ALIGN_HRIGHT = 0x002, C_STRING = 0,
+            C_CHOICES = 1, C_BOOLEAN = 2;
+
+    private JFrame mainWindow;
+
+    private JMenu typeMenu;
+    private JMenuItem solveCommand;
+    private Color[] colors;
+    private JLabel statusBar;
+    private PuzzlePanel pp;
+    private Runtime runtime;
+    private String[] puzzle_args;
+    private Graphics2D  gg;
+    private Timer timer;
+    private int xarg1, xarg2, xarg3;
+    private int[] xPoints, yPoints;
+    private BufferedImage[] blitters = new BufferedImage[512];
+    private ConfigDialog dlg;
+
+    static {
+        try {
+            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+    }
+
+    public void init() {
+        try {
+            Container cp = getContentPane();
+            cp.setLayout(new BorderLayout());
+            runtime = (Runtime) Class.forName("PuzzleEngine").newInstance();
+            runtime.setCallJavaCB(this);
+            JMenuBar menubar = new JMenuBar();
+            JMenu jm;
+            menubar.add(jm = new JMenu("Game"));
+            addMenuItemWithKey(jm, "New", 'n');
+            addMenuItemCallback(jm, "Restart", "jcallback_restart_event");
+            addMenuItemCallback(jm, "Specific...", "jcallback_config_event", CFG_DESC);
+            addMenuItemCallback(jm, "Random Seed...", "jcallback_config_event", CFG_SEED);
+            jm.addSeparator();
+            addMenuItemWithKey(jm, "Undo", 'u');
+            addMenuItemWithKey(jm, "Redo", 'r');
+            jm.addSeparator();
+            solveCommand = addMenuItemCallback(jm, "Solve", "jcallback_solve_event");
+            solveCommand.setEnabled(false);
+            if (mainWindow != null) {
+                jm.addSeparator();
+                addMenuItemWithKey(jm, "Exit", 'q');
+            }
+            menubar.add(typeMenu = new JMenu("Type"));
+            typeMenu.setVisible(false);
+            menubar.add(jm = new JMenu("Help"));
+            addMenuItemCallback(jm, "About", "jcallback_about_event");
+            setJMenuBar(menubar);
+            cp.add(pp = new PuzzlePanel(), BorderLayout.CENTER);
+            pp.addKeyListener(new KeyAdapter() {
+                public void keyPressed(KeyEvent e) {
+                    int key = -1;
+                    int shift = e.isShiftDown() ? MOD_SHFT : 0;
+                    int ctrl = e.isControlDown() ? MOD_CTRL : 0;
+                    switch (e.getKeyCode()) {
+                    case KeyEvent.VK_LEFT:
+                    case KeyEvent.VK_KP_LEFT:
+                        key = shift | ctrl | CURSOR_LEFT;
+                        break;
+                    case KeyEvent.VK_RIGHT:
+                    case KeyEvent.VK_KP_RIGHT:
+                        key = shift | ctrl | CURSOR_RIGHT;
+                        break;
+                    case KeyEvent.VK_UP:
+                    case KeyEvent.VK_KP_UP:
+                        key = shift | ctrl | CURSOR_UP;
+                        break;
+                    case KeyEvent.VK_DOWN:
+                    case KeyEvent.VK_KP_DOWN:
+                        key = shift | ctrl | CURSOR_DOWN;
+                        break;
+                    case KeyEvent.VK_PAGE_UP:
+                        key = shift | ctrl | MOD_NUM_KEYPAD | '9';
+                        break;
+                    case KeyEvent.VK_PAGE_DOWN:
+                        key = shift | ctrl | MOD_NUM_KEYPAD | '3';
+                        break;
+                    case KeyEvent.VK_HOME:
+                        key = shift | ctrl | MOD_NUM_KEYPAD | '7';
+                        break;
+                    case KeyEvent.VK_END:
+                        key = shift | ctrl | MOD_NUM_KEYPAD | '1';
+                        break;
+                    default:
+                        if (e.getKeyCode() >= KeyEvent.VK_NUMPAD0 && e.getKeyCode() <=KeyEvent.VK_NUMPAD9) {
+                            key = MOD_NUM_KEYPAD | (e.getKeyCode() - KeyEvent.VK_NUMPAD0+'0');
+                        }
+                    break;
+                    }
+                    if (key != -1) {
+                        runtimeCall("jcallback_key_event", new int[] {0, 0, key});
+                    }
+                }
+                public void keyTyped(KeyEvent e) {
+                    runtimeCall("jcallback_key_event", new int[] {0, 0, e.getKeyChar()});
+                }
+            });
+            pp.addMouseListener(new MouseAdapter() {
+                public void mouseReleased(MouseEvent e) {
+                    mousePressedReleased(e, true);
+                }
+                public void mousePressed(MouseEvent e) {
+                    pp.requestFocus();
+                    mousePressedReleased(e, false);
+                }
+                private void mousePressedReleased(MouseEvent e, boolean released) {
+                    int button;
+                    if ((e.getModifiers() & (InputEvent.BUTTON2_MASK | InputEvent.SHIFT_MASK)) != 0)
+                        button = MIDDLE_BUTTON;
+                    else if ((e.getModifiers() & (InputEvent.BUTTON3_MASK | InputEvent.ALT_MASK)) != 0)
+                        button = RIGHT_BUTTON;
+                    else if ((e.getModifiers() & (InputEvent.BUTTON1_MASK)) != 0)
+                        button = LEFT_BUTTON;
+                    else
+                        return;
+                    if (released)
+                        button += LEFT_RELEASE - LEFT_BUTTON;
+                    runtimeCall("jcallback_key_event", new int[] {e.getX(), e.getY(), button});
+                }
+            });
+            pp.addMouseMotionListener(new MouseMotionAdapter() {
+                public void mouseDragged(MouseEvent e) {
+                    int button;
+                    if ((e.getModifiers() & (InputEvent.BUTTON2_MASK | InputEvent.SHIFT_MASK)) != 0)
+                        button = MIDDLE_DRAG;
+                    else if ((e.getModifiers() & (InputEvent.BUTTON3_MASK | InputEvent.ALT_MASK)) != 0)
+                        button = RIGHT_DRAG;
+                    else
+                        button = LEFT_DRAG;
+                    runtimeCall("jcallback_key_event", new int[] {e.getX(), e.getY(), button});
+                }
+            });
+            pp.addComponentListener(new ComponentAdapter() {
+                public void componentResized(ComponentEvent e) {
+                    handleResized();
+                }
+            });
+            pp.setFocusable(true);
+            pp.requestFocus();
+            timer = new Timer(20, new ActionListener() {
+                public void actionPerformed(ActionEvent e) {
+                    runtimeCall("jcallback_timer_func", new int[0]);
+                }
+            });
+	    String gameid;
+	    try {
+		gameid = getParameter("game_id");
+	    } catch (java.lang.NullPointerException ex) {
+		gameid = null;
+	    }
+	    if (gameid == null) {
+		puzzle_args = null;
+	    } else {
+		puzzle_args = new String[2];
+		puzzle_args[0] = "puzzle";
+		puzzle_args[1] = gameid;
+	    }
+            SwingUtilities.invokeLater(new Runnable() {
+                public void run() {
+                    runtime.start(puzzle_args);
+                    runtime.execute();
+                }
+            });
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+    }
+
+    public void destroy() {
+        SwingUtilities.invokeLater(new Runnable() {
+            public void run() {
+                runtime.execute();
+                if (mainWindow != null) {
+                    mainWindow.dispose();
+                    System.exit(0);
+                }
+            }
+        });
+    }
+
+    protected void handleResized() {
+        pp.createBackBuffer(pp.getWidth(), pp.getHeight(), colors[0]);
+        runtimeCall("jcallback_resize", new int[] {pp.getWidth(), pp.getHeight()});
+    }
+
+    private void addMenuItemWithKey(JMenu jm, String name, int key) {
+        addMenuItemCallback(jm, name, "jcallback_menu_key_event", key);
+    }
+
+    private JMenuItem addMenuItemCallback(JMenu jm, String name, final String callback, final int arg) {
+        return addMenuItemCallback(jm, name, callback, new int[] {arg});
+    }
+
+    private JMenuItem addMenuItemCallback(JMenu jm, String name, final String callback) {
+        return addMenuItemCallback(jm, name, callback, new int[0]);
+    }
+
+    private JMenuItem addMenuItemCallback(JMenu jm, String name, final String callback, final int[] args) {
+        JMenuItem jmi;
+        if (jm == typeMenu)
+            typeMenu.add(jmi = new JCheckBoxMenuItem(name));
+        else
+        jm.add(jmi = new JMenuItem(name));
+        jmi.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                runtimeCall(callback, args);
+            }
+        });
+        return jmi;
+    }
+
+    protected void runtimeCall(String func, int[] args) {
+        if (runtimeCallWithResult(func, args) == 42 && mainWindow != null) {
+            destroy();
+        }
+    }
+
+    protected int runtimeCallWithResult(String func, int[] args) {
+        try {
+            return runtime.call(func, args);
+        } catch (Runtime.CallException ex) {
+            ex.printStackTrace();
+            return 42;
+        }
+    }
+
+    private void buildConfigureMenuItem() {
+        if (typeMenu.isVisible()) {
+            typeMenu.addSeparator();
+        } else {
+            typeMenu.setVisible(true);
+        }
+        addMenuItemCallback(typeMenu, "Custom...", "jcallback_config_event", CFG_SETTINGS);
+    }
+
+    private void addTypeItem(String name, final int ptrGameParams) {
+        typeMenu.setVisible(true);
+        addMenuItemCallback(typeMenu, name, "jcallback_preset_event", ptrGameParams);
+    }
+
+    public int call(int cmd, int arg1, int arg2, int arg3) {
+        try {
+            switch(cmd) {
+            case 0: // initialize
+                if (mainWindow != null) mainWindow.setTitle(runtime.cstring(arg1));
+                if ((arg2 & 1) != 0) buildConfigureMenuItem();
+                if ((arg2 & 2) != 0) addStatusBar();
+                if ((arg2 & 4) != 0) solveCommand.setEnabled(true);
+                colors = new Color[arg3];
+                return 0;
+            case 1: // Type menu item
+                addTypeItem(runtime.cstring(arg1), arg2);
+                return 0;
+            case 2: // MessageBox
+                JOptionPane.showMessageDialog(this, runtime.cstring(arg2), runtime.cstring(arg1), arg3 == 0 ? JOptionPane.INFORMATION_MESSAGE : JOptionPane.ERROR_MESSAGE);
+                return 0;
+            case 3: // Resize
+                pp.setPreferredSize(new Dimension(arg1, arg2));
+                if (mainWindow != null) mainWindow.pack();
+                handleResized();
+                if (mainWindow != null) mainWindow.setVisible(true);
+                return 0;
+            case 4: // drawing tasks
+                switch(arg1) {
+                case 0:
+		    String text = runtime.cstring(arg2);
+		    if (text.equals("")) text = " ";
+		    statusBar.setText(text);
+		    break;
+                case 1:
+                    gg = pp.backBuffer.createGraphics();
+                    if (arg2 != 0 || arg3 != 0 ||
+			arg2 + xarg2 != getWidth() ||
+			arg3 + xarg3 != getHeight()) {
+			int left = arg2, right = arg2 + xarg2;
+			int top = arg3, bottom = arg3 + xarg3;
+			int width = getWidth(), height = getHeight();
+                        gg.setColor(colors != null ? colors[0] : Color.black);
+                        gg.fillRect(0, 0, left, height);
+                        gg.fillRect(right, 0, width-right, height);
+                        gg.fillRect(0, 0, width, top);
+                        gg.fillRect(0, bottom, width, height-bottom);
+                        gg.setClip(left, top, right-left, bottom-top);
+                    }
+                    break;
+                case 2: gg.dispose(); pp.repaint(); break;
+                case 3: gg.setClip(arg2, arg3, xarg1, xarg2); break;
+                case 4:
+                    if (arg2 == 0 && arg3 == 0) {
+                        gg.setClip(0, 0, getWidth(), getHeight());
+                    } else {
+                        gg.setClip(arg2, arg3, getWidth()-2*arg2, getHeight()-2*arg3);
+                    }
+                    break;
+                case 5:
+                    gg.setColor(colors[xarg3]);
+                    gg.fillRect(arg2, arg3, xarg1, xarg2);
+                    break;
+                case 6:
+                    gg.setColor(colors[xarg3]);
+                    gg.drawLine(arg2, arg3, xarg1, xarg2);
+                    break;
+                case 7:
+                    xPoints = new int[arg2];
+                    yPoints = new int[arg2];
+                    break;
+                case 8:
+                    if (arg3 != -1) {
+                        gg.setColor(colors[arg3]);
+                        gg.fillPolygon(xPoints, yPoints, xPoints.length);
+                    }
+                    gg.setColor(colors[arg2]);
+                    gg.drawPolygon(xPoints, yPoints, xPoints.length);
+                    break;
+                case 9:
+                    if (arg3 != -1) {
+                        gg.setColor(colors[arg3]);
+                        gg.fillOval(xarg1-xarg3, xarg2-xarg3, xarg3*2, xarg3*2);
+                    }
+                    gg.setColor(colors[arg2]);
+                    gg.drawOval(xarg1-xarg3, xarg2-xarg3, xarg3*2, xarg3*2);
+                    break;
+                case 10:
+                    for(int i=0; i<blitters.length; i++) {
+                        if (blitters[i] == null) {
+                            blitters[i] = new BufferedImage(arg2, arg3, BufferedImage.TYPE_3BYTE_BGR);
+                            return i;
+                        }
+                    }
+                    throw new RuntimeException("No free blitter found!");
+                case 11: blitters[arg2] = null; break;
+                case 12:
+                    timer.start(); break;
+                case 13:
+                    timer.stop(); break;
+                }
+                return 0;
+            case 5: // more arguments
+                xarg1 = arg1;
+                xarg2 = arg2;
+                xarg3 = arg3;
+                return 0;
+            case 6: // polygon vertex
+                xPoints[arg1]=arg2;
+                yPoints[arg1]=arg3;
+                return 0;
+            case 7: // string
+                gg.setColor(colors[arg2]);
+                {
+                    String text = runtime.utfstring(arg3);
+                    Font ft = new Font((xarg3 & 0x10) != 0 ? "Monospaced" : "Dialog",
+                            Font.PLAIN, 100);
+                    int height100 = this.getFontMetrics(ft).getHeight();
+                    ft = ft.deriveFont(arg1 * 100 / (float)height100);
+                    FontMetrics fm = this.getFontMetrics(ft);
+                    int asc = fm.getAscent(), desc = fm.getDescent();
+                    if ((xarg3 & ALIGN_VCENTRE) != 0)
+                        xarg2 += asc - (asc+desc)/2;
+                    int wid = fm.stringWidth(text);
+                    if ((xarg3 & ALIGN_HCENTRE) != 0)
+                        xarg1 -= wid / 2;
+                    else if ((xarg3 & ALIGN_HRIGHT) != 0)
+                        xarg1 -= wid;
+                    gg.setFont(ft);
+                    gg.drawString(text, xarg1, xarg2);
+                }
+                return 0;
+            case 8: // blitter_save
+                Graphics g2 = blitters[arg1].createGraphics();
+                g2.drawImage(pp.backBuffer, 0, 0, blitters[arg1].getWidth(), blitters[arg1].getHeight(),
+                        arg2, arg3, arg2 + blitters[arg1].getWidth(), arg3 + blitters[arg1].getHeight(), this);
+                g2.dispose();
+                return 0;
+            case 9: // blitter_load
+                gg.drawImage(blitters[arg1], arg2, arg3, this);
+                return 0;
+            case 10: // dialog_init
+                dlg= new ConfigDialog(this, runtime.cstring(arg1));
+                return 0;
+            case 11: // dialog_add_control
+                {
+                    int sval_ptr = arg1;
+                    int ival = arg2;
+                    int ptr = xarg1;
+                    int type=xarg2;
+                    String name = runtime.cstring(xarg3);
+                    switch(type) {
+                    case C_STRING:
+                        dlg.addTextBox(ptr, name, runtime.cstring(sval_ptr));
+                        break;
+                    case C_BOOLEAN:
+                        dlg.addCheckBox(ptr, name, ival != 0);
+                        break;
+                    case C_CHOICES:
+                        dlg.addComboBox(ptr, name, runtime.cstring(sval_ptr), ival);
+                    }
+                }
+                return 0;
+            case 12:
+                dlg.finish();
+                dlg = null;
+                return 0;
+            case 13: // tick a menu item
+                if (arg1 < 0) arg1 = typeMenu.getItemCount() - 1;
+                for (int i = 0; i < typeMenu.getItemCount(); i++) {
+                    if (typeMenu.getMenuComponent(i) instanceof JCheckBoxMenuItem) {
+                        ((JCheckBoxMenuItem)typeMenu.getMenuComponent(i)).setSelected(arg1 == i);
+                    }
+                }
+                return 0;
+            default:
+                if (cmd >= 1024 && cmd < 2048) { // palette
+                    colors[cmd-1024] = new Color(arg1, arg2, arg3);
+                }
+            if (cmd == 1024) {
+                pp.setBackground(colors[0]);
+                if (statusBar != null) statusBar.setBackground(colors[0]);
+                this.setBackground(colors[0]);
+            }
+            return 0;
+            }
+        } catch (Throwable ex) {
+            ex.printStackTrace();
+            System.exit(-1);
+            return 0;
+        }
+    }
+
+    private void addStatusBar() {
+        statusBar = new JLabel("test");
+        statusBar.setBorder(new BevelBorder(BevelBorder.LOWERED));
+        getContentPane().add(BorderLayout.SOUTH,statusBar);
+    }
+
+    // Standalone runner
+    public static void main(String[] args) {
+        final PuzzleApplet a = new PuzzleApplet();
+        JFrame jf = new JFrame("Loading...");
+        jf.getContentPane().setLayout(new BorderLayout());
+        jf.getContentPane().add(a, BorderLayout.CENTER);
+        a.mainWindow=jf;
+        a.init();
+        a.start();
+        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        jf.addWindowListener(new WindowAdapter() {
+            public void windowClosing(WindowEvent e) {
+                a.stop();
+                a.destroy();
+            }
+        });
+        jf.setVisible(true);
+    }
+
+    public static class PuzzlePanel extends JPanel {
+
+        private static final long serialVersionUID = 1L;
+        protected BufferedImage backBuffer;
+
+        public PuzzlePanel() {
+            setPreferredSize(new Dimension(100,100));
+            createBackBuffer(100,100, Color.black);
+        }
+
+        public void createBackBuffer(int w, int h, Color bg) {
+	    if (w > 0 && h > 0) {
+		backBuffer = new BufferedImage(w,h, BufferedImage.TYPE_3BYTE_BGR);
+		Graphics g = backBuffer.createGraphics();
+		g.setColor(bg);
+		g.fillRect(0, 0, w, h);
+		g.dispose();
+	    }
+        }
+
+        protected void paintComponent(Graphics g) {
+            g.drawImage(backBuffer, 0, 0, this);
+        }
+    }
+
+    public static class ConfigComponent {
+        public int type;
+        public int configItemPointer;
+        public JComponent component;
+
+        public ConfigComponent(int type, int configItemPointer, JComponent component) {
+            this.type = type;
+            this.configItemPointer = configItemPointer;
+            this.component = component;
+        }
+    }
+
+    public class ConfigDialog extends JDialog {
+
+        private GridBagConstraints gbcLeft = new GridBagConstraints(
+                GridBagConstraints.RELATIVE, GridBagConstraints.RELATIVE, 1, 1,
+                0, 0, GridBagConstraints.WEST, GridBagConstraints.NONE,
+                new Insets(0, 0, 0, 0), 0, 0);
+        private GridBagConstraints gbcRight = new GridBagConstraints(
+                GridBagConstraints.RELATIVE, GridBagConstraints.RELATIVE,
+                GridBagConstraints.REMAINDER, 1, 1.0, 0,
+                GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL,
+                new Insets(5, 5, 5, 5), 0, 0);
+        private GridBagConstraints gbcBottom = new GridBagConstraints(
+                GridBagConstraints.RELATIVE, GridBagConstraints.RELATIVE,
+                GridBagConstraints.REMAINDER, GridBagConstraints.REMAINDER,
+                1.0, 1.0, GridBagConstraints.CENTER,
+                GridBagConstraints.HORIZONTAL, new Insets(5, 5, 5, 5), 0, 0);
+
+        private static final long serialVersionUID = 1L;
+        private List components = new ArrayList();
+
+        public ConfigDialog(JApplet parent, String title) {
+            super(JOptionPane.getFrameForComponent(parent), title, true);
+            getContentPane().setLayout(new GridBagLayout());
+        }
+
+        public void addTextBox(int ptr, String name, String value) {
+            getContentPane().add(new JLabel(name), gbcLeft);
+            JComponent c = new JTextField(value, 25);
+            getContentPane().add(c, gbcRight);
+            components.add(new ConfigComponent(C_STRING, ptr, c));
+        }
+
+
+        public void addCheckBox(int ptr, String name, boolean selected) {
+            JComponent c = new JCheckBox(name, selected);
+            getContentPane().add(c, gbcRight);
+            components.add(new ConfigComponent(C_BOOLEAN, ptr, c));
+        }
+
+        public void addComboBox(int ptr, String name, String values, int selected) {
+            getContentPane().add(new JLabel(name), gbcLeft);
+            StringTokenizer st = new StringTokenizer(values.substring(1), values.substring(0,1));
+            JComboBox c = new JComboBox();
+            c.setEditable(false);
+            while(st.hasMoreTokens())
+                c.addItem(st.nextToken());
+            c.setSelectedIndex(selected);
+            getContentPane().add(c, gbcRight);
+            components.add(new ConfigComponent(C_CHOICES, ptr, c));
+        }
+
+        public void finish() {
+            JPanel buttons = new JPanel(new GridLayout(1, 2, 5, 5));
+            getContentPane().add(buttons, gbcBottom);
+            JButton b;
+            buttons.add(b=new JButton("OK"));
+            b.addActionListener(new ActionListener() {
+                public void actionPerformed(ActionEvent e) {
+                    save();
+                    dispose();
+                }
+            });
+            getRootPane().setDefaultButton(b);
+            buttons.add(b=new JButton("Cancel"));
+            b.addActionListener(new ActionListener() {
+                public void actionPerformed(ActionEvent e) {
+                    dispose();
+                }
+            });
+            setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+            pack();
+            setLocationRelativeTo(null);
+            setVisible(true);
+        }
+        private void save() {
+            for (int i = 0; i < components.size(); i++) {
+                ConfigComponent cc = (ConfigComponent) components.get(i);
+                switch(cc.type) {
+                case C_STRING:
+                    JTextField jtf = (JTextField)cc.component;
+                    runtimeCall("jcallback_config_set_string", new int[] {cc.configItemPointer, runtime.strdup(jtf.getText())});
+                    break;
+                case C_BOOLEAN:
+                    JCheckBox jcb = (JCheckBox)cc.component;
+                    runtimeCall("jcallback_config_set_boolean", new int[] {cc.configItemPointer, jcb.isSelected()?1:0});
+                    break;
+                case C_CHOICES:
+                    JComboBox jcm = (JComboBox)cc.component;
+                    runtimeCall("jcallback_config_set_choice", new int[] {cc.configItemPointer, jcm.getSelectedIndex()});
+                    break;
+                }
+            }
+            runtimeCall("jcallback_config_ok", new int[0]);
+        }
+    }
+}