Chip 2001 May/Chip Mayıs 2001.iso/prog/share/33/data1.cab/Program_Executable_Files/OptimizeIt40D/Tutorial/QuickTourApp.java

Java Source | 2001-03-11 | 4.8 KB | 196 lines

package intuitive.quicktour;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.*;
import java.util.*;
import java.net.URL;

public class QuickTourApp extends JPanel implements ActionListener {
  Color  colors[] = { Color.black, Color.red, Color.green, Color.blue, Color.yellow };
  ImageIcon optitLogo;

  public QuickTourApp() {
    super();
    try {
      UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
    } catch (Exception exc) {
      System.err.println("Error couldn't read L&F: " + exc);
    }

    /*
     * Loading resources does not work the same way on windows and solaris
     */
    URL url = null;
    url = getClass().getClassLoader().getResource("OptimizeIt.gif");
    if(url == null) {
      url = getClass().getResource("OptimizeIt.gif");
    }
    optitLogo = new ImageIcon(url);

    setLayout(null); // Absolute positioning
    addShape();
    addShape();
  }

  public void actionPerformed(ActionEvent e) {
    String action = e.getActionCommand();
    if(action.equals("more"))
      addShape();
    else if(action.equals("less"))
      removeLastShape();
  }

  public void addShape() {
    int index = getComponentCount() % colors.length;
    QTShape s;
    s = new QTShape(colors[index % colors.length], index * 50, index * 50);
    add(s);
  }

  public void removeLastShape() {
    if(getComponentCount() > 0) {
      QTShape s = (QTShape) getComponent(getComponentCount() - 1);
      s.stop();
      repaint(s.getBounds());
      remove(s);
      s.stop();
    }
  }

  public void paintComponent(Graphics g) {
    int w = optitLogo.getIconWidth();
    int h = optitLogo.getIconHeight();

    g.setColor(Color.lightGray);
    g.fillRect(0,0,getWidth(), getHeight());
    optitLogo.paintIcon(this, g, (getWidth() - w) / 2, (getHeight() - h) / 2);
  }

  public static void main(String[] args) {
    try {
      String vers = System.getProperty("java.version");
      if (vers.compareTo("1.1.2") < 0) {
    System.out.println("!!!WARNING: Swing must be run with a " +
               "1.1.2 or higher version VM!!!");
      }
      QuickTourApp myQuickTourApp = new QuickTourApp();

      JFrame frame = new JFrame("OptimizeIt quick tour");
      JMenuBar  menuBar = new JMenuBar();
      JMenu     onlyMenu=new JMenu("Control");
      menuBar.add(onlyMenu);
      frame.setJMenuBar(menuBar);

      ButtonGroup group = new ButtonGroup();
      JMenuItem rbMenuItem = new JMenuItem("Add object");
      rbMenuItem.setActionCommand("more");
      rbMenuItem.setMnemonic('a');
      group.add(rbMenuItem);
      onlyMenu.add(rbMenuItem);
      rbMenuItem.addActionListener(myQuickTourApp);

      rbMenuItem = new JMenuItem("Remove object");
      rbMenuItem.setMnemonic('r');
      rbMenuItem.setActionCommand("less");
      rbMenuItem.addActionListener(myQuickTourApp);
      group.add(rbMenuItem);
      onlyMenu.add(rbMenuItem);

      frame.getContentPane().setLayout(new BorderLayout());
      frame.getContentPane().add("Center", myQuickTourApp);
      frame.addWindowListener(new WindowAdapter() {
    public void windowClosing(WindowEvent e) {
      System.exit(0);
    }});
      frame.setSize(300, 300);
      frame.show();
    }
    catch (Throwable t) {
      System.out.println("uncaught exception: " + t);
      t.printStackTrace();
    }
  }
}

class QTShape extends JComponent implements ActionListener {
  Color baseColor;
  javax.swing.Timer timer;
  double xWay,yWay;

  public QTShape(Color color,int x,int y) {
    setBounds(x,y,15,15);
    this.baseColor = color;
    xWay=1; yWay=1;
    timer = new javax.swing.Timer(1,this);
    timer.addActionListener(this);
    timer.setRepeats(true);
    timer.start();
  }

  protected void stop() {
    timer.stop();
  }

  public boolean isOpaque() {
    return true;
  }

  public void paintComponent(Graphics g) {
    g.setColor(baseColor);
    g.fill3DRect(0,0,getWidth(),getHeight(), true);
  }

  // The only action performed is the tick of the timer
  public void actionPerformed(ActionEvent event) {
    Component parent = getParent();
    int maxWidth  = parent.getWidth()  - getWidth();
    int maxHeight = parent.getHeight() - getHeight();
    int x=getX(),y=getY();

    if (maxWidth > 0 && maxHeight > 0) {
      if (x >= maxWidth) {
    x=maxWidth;
    xWay = -1 * (5 * Math.random());
      } else if (x <= 0) {
    x=0;
    xWay = 1  * (5 * Math.random());
      }

      if (y >= maxHeight) {
    y=maxHeight;
    yWay = -1 * (5 * Math.random());
      } else if (y <= 0) {
    y=0;
    yWay =  1 * (5 * Math.random());
      }

      x = (int) Math.rint((double)x + xWay);
      y = (int) Math.rint((double)y + yWay);

      setLocation(x,y);
    }
  }
}