//*********************************************************************
//*  Programmer    : Jang Kyu-O(Àå ±Ô¿À)                              *
//*  Date          : 1996/2/10                                        *
//*  E-Mail        : kojang@ctkhost.ctk.co.kr                         *
//*  Tel           : +82-02-3149-4821                                 *
//*  Address       : Á¦À̾¾Çö ¿¤¸²³×Æ®»ç¾÷º»ºÎ À¥ÆÀ                   *
//*********************************************************************

import java.applet.*;
import java.awt.*;
import java.lang.*;
import java.io.*;

class BarInfo
{
    private boolean canAccess = false;
    private int size=50;

    public synchronized void init() {
        canAccess = false;
        size = 50;
    }

    public int getSize(){ return size;};

    public synchronized int smallerSize() {
        while(canAccess == false ) {
            try {
                wait();
            } catch(Exception e) {
            }
        }
        size -=10;
        canAccess = false;
        System.out.println("smaller...");
        notify();
        return size;
    }
    public synchronized void largerSize() {
        while(canAccess == true ) {
            try {
                wait();
            } catch(Exception e) {
            }
        }
        size += 10;
        canAccess = true;
        System.out.println("larger !!!");
        notify();
    }
}

class LargerBarSize extends Thread
{
    BarInfo info;

    LargerBarSize(BarInfo i) {
        info = i;
    }

    public void run() {
        for (int i = 0; i < 100; i++) {
            info.largerSize();
            try {
                sleep( (int)(Math.random()*100));
            } catch(Exception e) {
            }
        }
    }
}

class SmallerBarSize extends Thread
{
    BarInfo info;

    SmallerBarSize(BarInfo i) {
        info = i;
    }

    public void run() {
        for (int i = 0; i < 100; i++) {
            info.smallerSize();
            try {
                sleep( (int)(Math.random()*200));
            } catch(Exception e) {
            }
        }
    }
}

public class BarThreadTest extends Applet implements Runnable
{
    Thread          updateThread;
    BarInfo         info;
    LargerBarSize   larger=null;
    SmallerBarSize  smaller=null;

    Image    tmpimg;
    Graphics tmpmap;
    boolean  isbegin=true;

    public void init() {
        info = new BarInfo();
    }

    public boolean mouseDown(Event evt, int x, int y) {
        if(updateThread != null)
            updateThread = null;
        if(larger != null)
            larger = null;
        if(smaller != null)
            smaller = null;

        info.init();

        updateThread = new Thread(this);
        larger = new LargerBarSize(info);
        smaller = new SmallerBarSize(info);

        updateThread.start();
        larger.start();
        smaller.start();

        return true;
    }

    public void stop() {
        if (updateThread.isAlive()) {
            updateThread.stop();
            updateThread = null;
        }
        if (larger.isAlive()) {
            larger.stop();
            larger = null;
        }
        if (smaller.isAlive()) {
            smaller.stop();
            smaller = null;
        }
    }

    public void run() {
        while (updateThread != null) {
            repaint();
            try {
                updateThread.sleep(10);
            } catch (InterruptedException e) {
            }
        }
    }    

    public void paint(Graphics g) {
        Rectangle r = bounds();

        if(isbegin==true) {
            tmpimg = createImage(r.width, r.height);
            tmpmap = tmpimg.getGraphics();
            isbegin = false;
        }

        update(g);
    }

    public void update(Graphics g) {
        tmpmap.setColor(Color.lightGray);
        tmpmap.fillRect(0, 0, size().width, size().height);

        if(larger!=null && smaller!=null) {
            tmpmap.setColor(Color.red);
            tmpmap.fill3DRect(10, 50, info.getSize(), 20, true);
            tmpmap.setColor(Color.blue);
            tmpmap.drawString("|", 10, 80);
            tmpmap.drawString("|", 60, 80);
            tmpmap.drawString("|", 110, 80);
            tmpmap.drawString("|", 110, 80);
            tmpmap.drawString("|", 160, 80);
            tmpmap.drawString("|", 210, 80);
            tmpmap.drawString("0", 10, 100);
            tmpmap.drawString("50", 60, 100);
            tmpmap.drawString("100", 110, 100);
            tmpmap.drawString("150", 110, 100);
            tmpmap.drawString("200", 160, 100);
            tmpmap.drawString("250", 210, 100);

            tmpmap.setFont(new Font("Helvista", 1, 20));
            tmpmap.setColor(new Color(0, 0, 170));
            tmpmap.drawString("Larger bar size...", 10, 150);
        } else {
            tmpmap.setFont(new Font("Helvista", 1, 20));
            tmpmap.setColor(new Color(0, 0, 170));
            tmpmap.drawString("Press mouse button...", 10, 150);
        }
        g.drawImage(tmpimg, 0, 0, this);
    }
}