Show events as they happen : Various Event Listener « Event « Java






Show events as they happen

Show events as they happen
  
// : c14:TrackEvent.java
// Show events as they happen.
// <applet code=TrackEvent width=700 height=500></applet>
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

import java.awt.Color;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.util.HashMap;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class TrackEvent extends JApplet {
  private HashMap h = new HashMap();

  private String[] event = { "focusGained", "focusLost", "keyPressed",
      "keyReleased", "keyTyped", "mouseClicked", "mouseEntered",
      "mouseExited", "mousePressed", "mouseReleased", "mouseDragged",
      "mouseMoved" };

  private MyButton b1 = new MyButton(Color.BLUE, "test1"), b2 = new MyButton(
      Color.RED, "test2");

  class MyButton extends JButton {
    void report(String field, String msg) {
      ((JTextField) h.get(field)).setText(msg);
    }

    FocusListener fl = new FocusListener() {
      public void focusGained(FocusEvent e) {
        report("focusGained", e.paramString());
      }

      public void focusLost(FocusEvent e) {
        report("focusLost", e.paramString());
      }
    };

    KeyListener kl = new KeyListener() {
      public void keyPressed(KeyEvent e) {
        report("keyPressed", e.paramString());
      }

      public void keyReleased(KeyEvent e) {
        report("keyReleased", e.paramString());
      }

      public void keyTyped(KeyEvent e) {
        report("keyTyped", e.paramString());
      }
    };

    MouseListener ml = new MouseListener() {
      public void mouseClicked(MouseEvent e) {
        report("mouseClicked", e.paramString());
      }

      public void mouseEntered(MouseEvent e) {
        report("mouseEntered", e.paramString());
      }

      public void mouseExited(MouseEvent e) {
        report("mouseExited", e.paramString());
      }

      public void mousePressed(MouseEvent e) {
        report("mousePressed", e.paramString());
      }

      public void mouseReleased(MouseEvent e) {
        report("mouseReleased", e.paramString());
      }
    };

    MouseMotionListener mml = new MouseMotionListener() {
      public void mouseDragged(MouseEvent e) {
        report("mouseDragged", e.paramString());
      }

      public void mouseMoved(MouseEvent e) {
        report("mouseMoved", e.paramString());
      }
    };

    public MyButton(Color color, String label) {
      super(label);
      setBackground(color);
      addFocusListener(fl);
      addKeyListener(kl);
      addMouseListener(ml);
      addMouseMotionListener(mml);
    }
  }

  public void init() {
    Container c = getContentPane();
    c.setLayout(new GridLayout(event.length + 1, 2));
    for (int i = 0; i < event.length; i++) {
      JTextField t = new JTextField();
      t.setEditable(false);
      c.add(new JLabel(event[i], JLabel.RIGHT));
      c.add(t);
      h.put(event[i], t);
    }
    c.add(b1);
    c.add(b2);
  }

  public static void main(String[] args) {
    run(new TrackEvent(), 700, 500);
  }

  public static void run(JApplet applet, int width, int height) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(applet);
    frame.setSize(width, height);
    applet.init();
    applet.start();
    frame.setVisible(true);
  }
} ///:~



           
         
    
  








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