Reverse Code Engineering RCE CD +sandman 2000/ReverseCodeEngineeringRceCdsandman2000.iso/RCE/Ebooks/Thinking in Java/c13/AutoEvent.java

Java Source | 2000-05-25 | 5.7 KB | 173 lines

//: AutoEvent.java
//////////////////////////////////////////////////
// Copyright (c) Bruce Eckel, 1998
// Source code file from the book "Thinking in Java"
// All rights reserved EXCEPT as allowed by the
// following statements: You can freely use this file
// for your own work (personal or commercial),
// including modifications and distribution in
// executable form only. Permission is granted to use
// this file in classroom situations, including its
// use in presentation materials, as long as the book
// "Thinking in Java" is cited as the source.
// Except in classroom situations, you cannot copy
// and distribute this code; instead, the sole
// distribution point is http://www.BruceEckel.com
// (and official mirror sites) where it is
// freely available. You cannot remove this
// copyright and notice. You cannot distribute
// modified versions of the source code in this
// package. You cannot use this file in printed
// media without the express permission of the
// author. Bruce Eckel makes no representation about
// the suitability of this software for any purpose.
// It is provided "as is" without express or implied
// warranty of any kind, including any implied
// warranty of merchantability, fitness for a
// particular purpose or non-infringement. The entire
// risk as to the quality and performance of the
// software is with you. Bruce Eckel and the
// publisher shall not be liable for any damages
// suffered by you or any third party as a result of
// using or distributing software. In no event will
// Bruce Eckel or the publisher be liable for any
// lost revenue, profit, or data, or for direct,
// indirect, special, consequential, incidental, or
// punitive damages, however caused and regardless of
// the theory of liability, arising out of the use of
// or inability to use software, even if Bruce Eckel
// and the publisher have been advised of the
// possibility of such damages. Should the software
// prove defective, you assume the cost of all
// necessary servicing, repair, or correction. If you
// think you've found an error, please email all
// modified files with clearly commented changes to:
// [e-mail]. (Please use the same
// address for non-code errors found in the book.)
/////////////////////////////////////////////////

// Alternatives to action()
import java.awt.*;
import java.applet.*;
import java.util.*;

class MyButton extends Canvas {
  AutoEvent parent;
  Color color;
  String label;
  MyButton(AutoEvent parent,
           Color color, String label) {
    this.label = label;
    this.parent = parent;
    this.color = color;
  }
  public void paint(Graphics  g) {
    g.setColor(color);
    int rnd = 30;
    g.fillRoundRect(0, 0, size().width,
                    size().height, rnd, rnd);
    g.setColor(Color.black);
    g.drawRoundRect(0, 0, size().width,
                    size().height, rnd, rnd);
    FontMetrics fm = g.getFontMetrics();
    int width = fm.stringWidth(label);
    int height = fm.getHeight();
    int ascent = fm.getAscent();
    int leading = fm.getLeading();
    int horizMargin = (size().width - width)/2;
    int verMargin = (size().height - height)/2;
    g.setColor(Color.white);
    g.drawString(label, horizMargin,
                 verMargin + ascent + leading);
  }
  public boolean keyDown(Event evt, int key) {
    TextField t =
      (TextField)parent.h.get("keyDown");
    t.setText(evt.toString());
    return true;
  }
  public boolean keyUp(Event evt, int key) {
    TextField t =
      (TextField)parent.h.get("keyUp");
    t.setText(evt.toString());
    return true;
  }
  public boolean lostFocus(Event evt, Object w) {
    TextField t =
      (TextField)parent.h.get("lostFocus");
    t.setText(evt.toString());
    return true;
  }
  public boolean gotFocus(Event evt, Object w) {
    TextField t =
      (TextField)parent.h.get("gotFocus");
    t.setText(evt.toString());
    return true;
  }
  public boolean
  mouseDown(Event evt,int x,int y) {
    TextField t =
      (TextField)parent.h.get("mouseDown");
    t.setText(evt.toString());
    return true;
  }
  public boolean
  mouseDrag(Event evt,int x,int y) {
    TextField t =
      (TextField)parent.h.get("mouseDrag");
    t.setText(evt.toString());
    return true;
  }
  public boolean
  mouseEnter(Event evt,int x,int y) {
    TextField t =
      (TextField)parent.h.get("mouseEnter");
    t.setText(evt.toString());
    return true;
  }
  public boolean
  mouseExit(Event evt,int x,int y) {
    TextField t =
      (TextField)parent.h.get("mouseExit");
    t.setText(evt.toString());
    return true;
  }
  public boolean
  mouseMove(Event evt,int x,int y) {
    TextField t =
      (TextField)parent.h.get("mouseMove");
    t.setText(evt.toString());
    return true;
  }
  public boolean mouseUp(Event evt,int x,int y) {
    TextField t =
      (TextField)parent.h.get("mouseUp");
    t.setText(evt.toString());
    return true;
  }
}

public class AutoEvent extends Applet {
  Hashtable h = new Hashtable();
  String[] event = {
    "keyDown", "keyUp", "lostFocus",
    "gotFocus", "mouseDown", "mouseUp",
    "mouseMove", "mouseDrag", "mouseEnter",
    "mouseExit"
  };
  MyButton
    b1 = new MyButton(this, Color.blue, "test1"),
    b2 = new MyButton(this, Color.red, "test2");
  public void init() {
    setLayout(new GridLayout(event.length+1,2));
    for(int i = 0; i < event.length; i++) {
      TextField t = new TextField();
      t.setEditable(false);
      add(new Label(event[i], Label.CENTER));
      add(t);
      h.put(event[i], t);
    }
    add(b1);
    add(b2);
  }
} ///:~