import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class EventHandling extends JFrame {
  JFrame frame;
  JPanel framePanel;
  JPanel textFieldPanel;
  JButton button;
  JTextField actionEventTextField;
  JTextField keyEventTextField;
  JTextField mouseMotionEventTextField;
  int buttonClickedCount;
  private static int TEXT_FIELD_SIZE = 20;
    
  public EventHandling() {    
    frame = new JFrame("CE325 - Event Handling Demo");    
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
    button = new JButton("  Put Cursor!  ");
    button.setBackground(new Color(0xe9,0xe9,0xe9));
    button.setFont(new Font("Courier", Font.BOLD, 15));
    Border buttonBorder = BorderFactory.createRaisedBevelBorder();
    button.setBorder(buttonBorder);
    
    buttonClickedCount = 0;
    button.addActionListener( new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        buttonClickedCount++;
        actionEventTextField.setText("Button clicked "+buttonClickedCount+" times!");
      }
    });
    
    button.addMouseListener( new MouseListener() {
      public void mouseClicked(MouseEvent e) {        
      }
      public void mouseEntered(MouseEvent e) {
        button.setText("  Press  me!   ");
      }
      public void mouseExited(MouseEvent e) {
        button.setText("  Put Cursor!  ");
      }
      public void mousePressed(MouseEvent e) {
        button.setText("  Release Me!  ");
      }
      public void mouseReleased(MouseEvent e) {
        button.setText("  Press again  ");
      }
    });
      
    frame.add(button, BorderLayout.EAST);
       
    textFieldPanel = new JPanel(new GridLayout(5, 2, 3, 3));    
    
    textFieldPanel.add(new JLabel("Button Clicks:"));
    actionEventTextField = new JTextField("", TEXT_FIELD_SIZE);    
    textFieldPanel.add(actionEventTextField);
    
    textFieldPanel.add(new JLabel("Keyboard Input:"));
    keyEventTextField = new JTextField("", TEXT_FIELD_SIZE);
    keyEventTextField.addKeyListener( new KeyListener() {
      public void keyTyped(KeyEvent e) {        
        keyEventTextField.setText("Character \""+e.getKeyChar()+"\" was pressed");
      }
      public void keyPressed(KeyEvent e) {
        keyEventTextField.setText("");
      }
      public void keyReleased(KeyEvent e) {
        if(e.getKeyCode() == KeyEvent.VK_SHIFT || 
           e.getKeyCode() == KeyEvent.VK_CONTROL ||
           e.getKeyCode() == KeyEvent.VK_ENTER
           )
          return;        
        String str = keyEventTextField.getText();        
        str = str.substring(0,str.length()-1);
        keyEventTextField.setText(str);
      }
    });    
    textFieldPanel.add(keyEventTextField);    
    
    textFieldPanel.add(new JLabel("Mouse current position on window:"));
    mouseMotionEventTextField = new JTextField("", TEXT_FIELD_SIZE);
    frame.addMouseMotionListener( new MouseMotionListener() {
      public void mouseDragged(MouseEvent e) {
      }
      public void mouseMoved(MouseEvent e) {
        mouseMotionEventTextField.setText("Cursor position at "+e.getX()+", "+e.getY());
      }
    });    
    textFieldPanel.add(mouseMotionEventTextField);    
    
    frame.add(textFieldPanel, BorderLayout.CENTER);
    
    frame.pack();
    frame.setVisible(true);
  }
  
  public static void main(String []args) {
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
      public void run() {
       new EventHandling();
      }
    });
  }
}