import javax.swing.*;
//import com.sun.java.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.applet.*;


public class JModalPanel extends JDesktopPane
{
  private int containerWidth, containerHeight;
  private boolean comboBoxVersion;
  private String enterButtonText;
  private JComboBox comboBox;
  private JControlPanel controlPanel;
  private Container container;
  private CoverableContainer ret;
  private Image buffer;
  private Graphics bg;
  private Image background;
  MoveListener ml;
  Component[] components;
  
  private LayoutManager layoutManager;
  
  public JModalPanel(Container container, CoverableContainer ret, String text, String initText)
  {
    super();
    
    this.container = container;
    while(!(this.container instanceof Applet) && 
          !(this.container instanceof JApplet) && 
          !(this.container instanceof Frame)  &&
          !(this.container instanceof JFrame)) 
      this.container = this.container.getParent();
    this.ret = ret;
    this.containerWidth = this.container.getSize().width;
    this.containerHeight = this.container.getSize().height;
        
    setVisible(false);
    container.add(this);
    
    background = createImage(containerWidth, containerHeight);
    Graphics backG = background.getGraphics();
    this.container.paint(backG);
    backG.dispose();
    
    if(this.container instanceof JApplet)
      this.container = ((JApplet)this.container).getContentPane();
    if(this.container instanceof JFrame)
      this.container = ((JFrame)this.container).getContentPane();
    
    // this is to fix a bug in the jdk1.2, next two lines must be here
    setVisible(true);
    setBounds(0, 0, this.containerWidth, this.containerHeight);
    components = this.container.getComponents();
    this.container.removeAll();
    this.container.add(this);
    
    if(this.container.getLayout() != null) 
      layoutManager = this.container.getLayout();
    this.container.setLayout(null);
    
    buffer = createImage(containerWidth, containerHeight);
    bg = buffer.getGraphics();
    bg.drawImage(background,0,0,this);
    
    enterButtonText = "Enter";
    comboBoxVersion = false;
    
    controlPanel = new JControlPanel(text, initText);
    add(controlPanel);
    controlPanel.validate();
    setVisible(true);
    
    requestFocus();
    controlPanel.requestFocus();
    controlPanel.userEntry.requestFocus();
  }
  
  public JModalPanel(Container container, CoverableContainer ret, String text)
  {
    this(container, ret, text, "");
  }
  
  public JModalPanel(Container container, CoverableContainer ret, String text, 
                     JComboBox comboBox, String enterButtonText)
  {
    super();
    
    comboBoxVersion = true;
    this.comboBox = comboBox;
    this.enterButtonText = enterButtonText;
    
    this.container = container;
    while(!(this.container instanceof Applet) && 
          !(this.container instanceof JApplet) && 
          !(this.container instanceof Frame)  &&
          !(this.container instanceof JFrame)) 
      this.container = this.container.getParent();
    this.ret = ret;
    this.containerWidth = this.container.getSize().width;
    this.containerHeight = this.container.getSize().height;
        
    setVisible(false);
    container.add(this);
    
    background = createImage(containerWidth, containerHeight);
    Graphics backG = background.getGraphics();
    this.container.paint(backG);
    backG.dispose();
    
    
    if(this.container instanceof JApplet)
      this.container = ((JApplet)this.container).getContentPane();
    if(this.container instanceof JFrame)
      this.container = ((JFrame)this.container).getContentPane();
    
    // this is to fix a bug in the jdk1.2, next two lines must be here
    setVisible(true);
    setBounds(0, 0, this.containerWidth, this.containerHeight);
    components = this.container.getComponents();
    this.container.removeAll();
    this.container.add(this);
    
    buffer = createImage(containerWidth, containerHeight);
    bg = buffer.getGraphics();
    bg.drawImage(background,0,0,this);
    
    enterButtonText = "Enter";
    
    controlPanel = new JControlPanel(text, comboBox);
    add(controlPanel);
    controlPanel.validate();
    setVisible(true);
    
    if(this.container.getLayout() != null) 
      layoutManager = this.container.getLayout();
    this.container.setLayout(null);
    
    requestFocus();
    controlPanel.requestFocus();
  }
  
  public void paint(Graphics g)
  {
    g.setClip(0,0,containerWidth,containerHeight);
    g.drawImage(buffer, 0, 0, this);
    g.setClip(controlPanel.getBounds());
    super.paint(g);
  }
  
  public class JControlPanel extends JInternalFrame
  {
    JTextField userEntry;
    int width = 250;
    int height = 150;
    
    public JControlPanel(String text, String initText)
    {
      super();
      System.out.println("bye, after");
      getContentPane().setLayout(new BorderLayout());
      
      JPanel basePanel = new JPanel(new BorderLayout());
      JPanel buttonPanel = new JPanel(new FlowLayout(), false);
      buttonPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
      
      JButton enterButton  = new JButton(enterButtonText);
      enterButton.addActionListener(new SubmitTextButtonListener());
      JButton cancelButton = new JButton("Cancel");
      cancelButton.addActionListener(new CancelButtonListener());
      buttonPanel.add(enterButton);
      buttonPanel.add(cancelButton);
      basePanel.add(buttonPanel,BorderLayout.SOUTH);
      
      JLabel textLabel = new JLabel(text);
      textLabel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
      userEntry = new JTextField(initText);
      
      userEntry.setPreferredSize(new Dimension(textLabel.getSize().width-10, 
                        userEntry.getPreferredSize().height));
      userEntry.addActionListener(new SubmitTextButtonListener());
      basePanel.add(textLabel,BorderLayout.NORTH);
      basePanel.add(userEntry,BorderLayout.CENTER);
      
      basePanel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
      getContentPane().add(basePanel, BorderLayout.CENTER);
      
      userEntry.requestFocus();
      
      if(getPreferredSize().width+30 > containerWidth-100) {
        setSize(containerWidth-100, getPreferredSize().height);
      }
      else {
        setSize(getPreferredSize().width+30, getPreferredSize().height);
      }
      setLocation((container.getSize().width-getSize().width)/2,
                  (container.getSize().height-getSize().height)/2);
    }

    public JControlPanel(String text, JComboBox comboBox)
    {
      super();
      getContentPane().setLayout(new BorderLayout());
      
      JPanel basePanel = new JPanel(new BorderLayout());
      
      JPanel buttonPanel = new JPanel(new FlowLayout(), false);
      buttonPanel.setBorder(BorderFactory.createEmptyBorder(10,5,10,5));
                        
      JButton enterButton  = new JButton(enterButtonText);
      enterButton.addActionListener(new SubmitComboBoxButtonListener());
      JButton cancelButton = new JButton("Cancel");
      cancelButton.addActionListener(new CancelButtonListener());
      buttonPanel.add(enterButton);
      buttonPanel.add(cancelButton);
      basePanel.add(buttonPanel,BorderLayout.SOUTH);
      
      JLabel textLabel = new JLabel(text);
      textLabel.setBorder(BorderFactory.createEmptyBorder(10,5,10,5));
      comboBox.setMaximumRowCount(3);
      
      basePanel.add(textLabel,BorderLayout.NORTH);
      basePanel.add(comboBox,BorderLayout.CENTER);
      
      basePanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
      getContentPane().add(basePanel, BorderLayout.CENTER);
      
      if(getPreferredSize().width+50 > containerWidth-100) {
        setSize(containerWidth-100, getPreferredSize().height+5);
      }
      else {
        setSize(getPreferredSize().width+50, getPreferredSize().height+5);
      }
      setLocation((container.getSize().width-getSize().width)/2,
                  (container.getSize().height-getSize().height)/2);
    }
    
    public void requestFocus() {
      super.requestFocus();
    }
  }
  
  public class MoveListener extends MouseAdapter implements MouseMotionListener {
    int dx, dy;
    int pWidth, pHeight;
    boolean moving = false;
    Graphics g;
    
    public void mousePressed(MouseEvent e) {
      moving = true;
      pWidth  = controlPanel.getSize().width;
      pHeight = controlPanel.getSize().height;
      dx = e.getX()- controlPanel.getLocation().x;
      dy = e.getY()- controlPanel.getLocation().y;
      g = getGraphics();
      bg.drawImage(background,0,0,null);
      bg.setColor(Color.blue);
      bg.drawRect(e.getX()-dx,e.getY()-dy,pWidth,pHeight);
      g.drawImage(buffer,0,0,null);
    }
    
    public void mouseDragged(MouseEvent e) {
      if(moving) {
        int newX = e.getX()-dx;
        int newY = e.getY()-dy;
        if(newX < 0) newX = 0;
        if((newX+pWidth)>containerWidth) newX = containerWidth-pWidth;
        if(newY < 0) newY = 0;
        if((newY+pHeight)>containerHeight) newY = containerHeight-pHeight;
        bg.drawImage(background,0,0,null);
        bg.drawRect(newX,newY,pWidth,pHeight);
        g.drawImage(buffer,0,0,null);
      }
    }
    
    public void mouseReleased(MouseEvent e) {
      if(moving) {
        int newX = e.getX()-dx;
        int newY = e.getY()-dy;
        if(newX < 0) newX = 0;
        if((newX+pWidth)>containerWidth) newX = containerWidth-pWidth;
        if(newY < 0) newY = 0;
        if((newY+pHeight)>containerHeight) newY = containerHeight-pHeight;
        controlPanel.setLocation(newX,newY);
        bg.drawImage(background,0,0,null);
        g.drawImage(buffer,0,0,null);
      }
      moving = false;
    }
    
    public void mouseMoved(MouseEvent e) {}
  }
  
  public void dispose() {
    try {
      
      container.setLayout(layoutManager);
      for(int i=0; i<components.length; i++)
        container.add(components[i]);
      container.remove(this);
      container.validate();
    
      buffer.flush();
      buffer = null;
      background.flush();
      background = null;
      bg.dispose();
      bg = null;
      container.repaint();
    }
    catch(NullPointerException e) {}
  }
  
  
  class CancelButtonListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      dispose();
    }
  }
  
  
  class SubmitTextButtonListener implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      String text = controlPanel.userEntry.getText();
      dispose();
      ret.returnValue(text);
    }
  }
  
  
  class SubmitComboBoxButtonListener implements ActionListener
  {
    public void actionPerformed(ActionEvent e)
    {
      dispose();
      ret.returnValue(comboBox.getSelectedIndex());
    }
  }
}