swiminfo.java

java patterns book

import java.awt.*;
import java.awt.event.*;

public class SwimInfo extends Frame
   implements ActionListener
{
   SwimData sdata, sxdata = null;
   List swList, cloneList;
   Button Clone, Refresh, Quit;
   Swimmer sw;

   public SwimInfo()
   {
    super("Prototype example");
    sdata = new SwimData("swimmers.txt");
   
    setGUI();
    loadswList();
   }
   //-----------------------------------
   public void actionPerformed(ActionEvent e)
   {
      Object obj = e.getSource();
      if(obj == Clone)
         cloneAndLoad();
      if(obj == Refresh)
         loadswList();
      if(obj == Quit)
         System.exit(0);
   }
   //-----------------------------------
   private void cloneAndLoad()
   {
    //sxdata = (SwimData)sdata.deepClone();
    sxdata = (SwimData)sdata.clone();
    sxdata.sortByTime();
    
    cloneList.removeAll();
    //now print out sorted values from clone
    for(int i=0; i< sxdata.size(); i++)
      {
       sw = sxdata.getSwimmer(i);
       cloneList.addItem(sw.getName()+" "+sw.getTime());
     }
   }
   //-----------------------------------
   private void loadswList()
   {
      swList.removeAll();
      for(int i=0; i< sdata.size(); i++)
      {
       sw = sdata.getSwimmer(i);
       swList.addItem(sw.getName()+" "+sw.getTime());
      }
   }
   //-----------------------------------

   private void setGUI()
   {
      setLayout(new GridLayout(1,3));
      setBackground(Color.lightGray);
      swList = new List(15);
      cloneList = new List(15);
      Panel cp = new Panel();
      add(swList);
      add(cp);
      add(cloneList);
      Clone = new Button("Clone -->");
      Refresh = new Button("<--Refresh");
      Quit = new Button("Quit");
      cp.setLayout(new GridLayout(3,1));
      Panel p1 = new Panel();
      cp.add(p1);
      p1.add(Clone);
      Panel p2 = new Panel();
      cp.add(p2);
      p2.add(Refresh);
      Panel p3 = new Panel();
      cp.add(p3);
      p3.add(Quit);
      Clone.addActionListener(this);
      Refresh.addActionListener(this);
      Quit.addActionListener(this);
      setBounds( 100,100,500,400);
      setVisible(true);
   }
   //-----------------------------------
   static public void main(String argv[])
   {
      new SwimInfo();
   }
}