swinggui.java

java中比较著名的js引擎当属mozilla开源的rhino

    /**
     * The {@link FileTextArea} this popup menu is attached to.
     */
    private FileTextArea w;

    /**
     * The popup x position.
     */
    int x;
    
    /**
     * The popup y position.
     */
    int y;

    /**
     * Creates a new FilePopupMenu.
     */
    public FilePopupMenu(FileTextArea w) {
        this.w = w;
        JMenuItem item;
        add(item = new JMenuItem("Set Breakpoint"));
        item.addActionListener(w);
        add(item = new JMenuItem("Clear Breakpoint"));
        item.addActionListener(w);
        add(item = new JMenuItem("Run"));
        item.addActionListener(w);
    }

    /**
     * Displays the menu at the given coordinates.
     */
    public void show(JComponent comp, int x, int y) {
        this.x = x;
        this.y = y;
        super.show(comp, x, y);
    }
}

/**
 * Text area to display script source.
 */
class FileTextArea
    extends JTextArea
    implements ActionListener, PopupMenuListener, KeyListener, MouseListener {

    /**
     * Serializable magic number.
     */
    private static final long serialVersionUID = -25032065448563720L;

    /**
     * The owning {@link FileWindow}.
     */
    private FileWindow w;

    /**
     * The popup menu.
     */
    private FilePopupMenu popup;

    /**
     * Creates a new FileTextArea.
     */
    public FileTextArea(FileWindow w) {
        this.w = w;
        popup = new FilePopupMenu(this);
        popup.addPopupMenuListener(this);
        addMouseListener(this);
        addKeyListener(this);
        setFont(new Font("Monospaced", 0, 12));
    }

    /**
     * Moves the selection to the given offset.
     */
    public void select(int pos) {
        if (pos >= 0) {
            try {
                int line = getLineOfOffset(pos);
                Rectangle rect = modelToView(pos);
                if (rect == null) {
                    select(pos, pos);
                } else {
                    try {
                        Rectangle nrect =
                            modelToView(getLineStartOffset(line + 1));
                        if (nrect != null) {
                            rect = nrect;
                        }
                    } catch (Exception exc) {
                    }
                    JViewport vp = (JViewport)getParent();
                    Rectangle viewRect = vp.getViewRect();
                    if (viewRect.y + viewRect.height > rect.y) {
                        // need to scroll up
                        select(pos, pos);
                    } else {
                        // need to scroll down
                        rect.y += (viewRect.height - rect.height)/2;
                        scrollRectToVisible(rect);
                        select(pos, pos);
                    }
                }
            } catch (BadLocationException exc) {
                select(pos, pos);
                //exc.printStackTrace();
            }
        }
    }

    /**
     * Checks if the popup menu should be shown.
     */
    private void checkPopup(MouseEvent e) {
        if (e.isPopupTrigger()) {
            popup.show(this, e.getX(), e.getY());
        }
    }

    // MouseListener

    /**
     * Called when a mouse button is pressed.
     */
    public void mousePressed(MouseEvent e) {
        checkPopup(e);
    }

    /**
     * Called when the mouse is clicked.
     */
    public void mouseClicked(MouseEvent e) {
        checkPopup(e);
        requestFocus();
        getCaret().setVisible(true);
    }

    /**
     * Called when the mouse enters the component.
     */
    public void mouseEntered(MouseEvent e) {
    }

    /**
     * Called when the mouse exits the component.
     */
    public void mouseExited(MouseEvent e) {
    }

    /**
     * Called when a mouse button is released.
     */
    public void mouseReleased(MouseEvent e) {
        checkPopup(e);
    }

    // PopupMenuListener

    /**
     * Called before the popup menu will become visible.
     */
    public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
    }

    /**
     * Called before the popup menu will become invisible.
     */
    public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
    }

    /**
     * Called when the popup menu is cancelled.
     */
    public void popupMenuCanceled(PopupMenuEvent e) {
    }

    // ActionListener

    /**
     * Performs an action.
     */
    public void actionPerformed(ActionEvent e) {
        int pos = viewToModel(new Point(popup.x, popup.y));
        popup.setVisible(false);
        String cmd = e.getActionCommand();
        int line = -1;
        try {
            line = getLineOfOffset(pos);
        } catch (Exception exc) {
        }
        if (cmd.equals("Set Breakpoint")) {
            w.setBreakPoint(line + 1);
        } else if (cmd.equals("Clear Breakpoint")) {
            w.clearBreakPoint(line + 1);
        } else if (cmd.equals("Run")) {
            w.load();
        }
    }

    // KeyListener

    /**
     * Called when a key is pressed.
     */
    public void keyPressed(KeyEvent e) {
        switch (e.getKeyCode()) {
        case KeyEvent.VK_BACK_SPACE:
        case KeyEvent.VK_ENTER:
        case KeyEvent.VK_DELETE:
            e.consume();
            break;
        }
    }

    /**
     * Called when a key is typed.
     */
    public void keyTyped(KeyEvent e) {
        e.consume();
    }

    /**
     * Called when a key is released.
     */
    public void keyReleased(KeyEvent e) {
        e.consume();
    }
}

/**
 * Dialog to list the available windows.
 */
class MoreWindows extends JDialog implements ActionListener {

    /**
     * Serializable magic number.
     */
    private static final long serialVersionUID = 5177066296457377546L;

    /**
     * Last selected value.
     */
    private String value;

    /**
     * The list component.
     */
    private JList list;

    /**
     * Table of file windows.
     */
    private Hashtable fileWindows;

    /**
     * The "Select" button.
     */
    private JButton setButton;

    /**
     * The "Refresh" button.
     */
    private JButton refreshButton;

    /**
     * The "Cancel" button.
     */
    private JButton cancelButton;

    /**
     * Creates a new MoreWindows.
     */
    MoreWindows(JFrame frame, Hashtable fileWindows, String title,
                String labelText) {
        super(frame, title, true);
        this.fileWindows = fileWindows;
        //buttons
        cancelButton = new JButton("Cancel");
        setButton = new JButton("Select");
        cancelButton.addActionListener(this);
        setButton.addActionListener(this);
        getRootPane().setDefaultButton(setButton);

        //dim part of the dialog
        list = new JList(new DefaultListModel());
        DefaultListModel model = (DefaultListModel)list.getModel();
        model.clear();
        //model.fireIntervalRemoved(model, 0, size);
        Enumeration e = fileWindows.keys();
        while (e.hasMoreElements()) {
            String data = e.nextElement().toString();
            model.addElement(data);
        }
        list.setSelectedIndex(0);
        //model.fireIntervalAdded(model, 0, data.length);
        setButton.setEnabled(true);
        list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        list.addMouseListener(new MouseHandler());
        JScrollPane listScroller = new JScrollPane(list);
        listScroller.setPreferredSize(new Dimension(320, 240));
        //XXX: Must do the following, too, or else the scroller thinks
        //XXX: it's taller than it is:
        listScroller.setMinimumSize(new Dimension(250, 80));
        listScroller.setAlignmentX(LEFT_ALIGNMENT);

        //Create a container so that we can add a title around
        //the scroll pane.  Can't add a title directly to the
        //scroll pane because its background would be white.
        //Lay out the label and scroll pane from top to button.
        JPanel listPane = new JPanel();
        listPane.setLayout(new BoxLayout(listPane, BoxLayout.Y_AXIS));
        JLabel label = new JLabel(labelText);
        label.setLabelFor (list);
        listPane.add(label);
        listPane.add(Box.createRigidArea(new Dimension(0,5)));
        listPane.add(listScroller);
        listPane.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));

        //Lay out the buttons from left to right.
        JPanel buttonPane = new JPanel();
        buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.X_AXIS));
        buttonPane.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
        buttonPane.add(Box.createHorizontalGlue());
        buttonPane.add(cancelButton);
        buttonPane.add(Box.createRigidArea(new Dimension(10, 0)));
        buttonPane.add(setButton);

        //Put everything together, using the content pane's BorderLayout.
        Container contentPane = getContentPane();
        contentPane.add(listPane, BorderLayout.CENTER);
        contentPane.add(buttonPane, BorderLayout.SOUTH);
        pack();
        addKeyListener(new KeyAdapter() {
                public void keyPressed(KeyEvent ke) {
                    int code = ke.getKeyCode();
                    if (code == KeyEvent.VK_ESCAPE) {
                        ke.consume();
                        value = null;
                        setVisible(false);
                    }
                }
            });
    }

    /**
     * Shows the dialog.
     */
    public String showDialog(Component comp) {
        value = null;
        setLocationRelativeTo(comp);
        setVisible(true);
        return value;
    }

    /**
     * Sets the selected value.
     */
    private void setValue(String newValue) {
        value = newValue;
        list.setSelectedValue(value, true);
    }

    // ActionListener

    /**
     * Performs an action.
     */
    public void actionPerformed(ActionEvent e) {
        String cmd = e.getActionCommand();
        if (cmd.equals("Cancel")) {
            setVisible(false);
            value = null;
        } else if (cmd.equals("Select")) {
            value = (String)list.getSelectedValue();
            setVisible(false);
            JInternalFrame w = (JInternalFrame)fileWindows.get(value);
            if (w != null) {
                try {
                    w.show();
                    w.setSelected(true);
                } catch (Exception exc) {
                }
            }
        }
    }

    /**
     * MouseListener implementation for {@link #list}.
     */
    private class MouseHandler extends MouseAdapter {
        public void mouseClicked(MouseEvent e) {
            if (e.getClickCount() == 2) {
                setButton.doClick();
            }
        }
    };
};

/**
 * Find function dialog.
 */
class FindFunction extends JDialog implements ActionListener {

    /**
     * Serializable magic number.
     */
    private static final long serialVersionUID = 559491015232880916L;

    /**
     * Last selected function.
     */
    private String value;

    /**
     * List of functions.
     */
    private JList list;

    /**
     * The debug GUI frame.
     */
    private SwingGui debugGui;

    /**
     * The "Select" button.
     */
    private JButton setButton;

    /**
     * The "Refresh" button.
     */