///////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////
// Java Panorama Applet /I-ichirow Suzuki
//
import java.applet.Applet;
import java.awt.*;
//---------------------------------------------------------------------------------------------
public class Panorama extends Applet    implements Runnable
{
    Thread thread;
    int appwidth;
    int appheight;
    int stime;
    int step;
    int nowstep;
    int mode;
    int status;
    int x;
    int y;
    Image image;
    MediaTracker mt;
    boolean mouseflag;
    int imgwidth;
    int imgheight;
    Image offimg;
    Graphics offscr;
    final String STATUSTEXT = "Panorama Applet";
	//--------------------------------------------------------
    public Panorama()
    {
    }
	//--------------------------------------------------------
    public void init()
    {
        stime = 120;
        step = 8;
        mode = 1;
        status = 0;
        x = 0;
        y = 0;
        mouseflag = false;
        appwidth = size().width;
        appheight = size().height;
        String s = null;
        s = getParameter("image");
        if(s == null)
        {
            image = null;
        } else
        {
            image = getImage(getDocumentBase(), s);
            mt = new MediaTracker(this);
            mt.addImage(image, 0);
        }
        s = getParameter("stime");
        if(s != null)
            stime = Integer.valueOf(s).intValue();
        s = getParameter("step");
        if(s != null)
            step = Integer.valueOf(s).intValue();
        s = getParameter("mode");
        if(s != null)
            mode = Integer.valueOf(s).intValue();
        nowstep = step;
        offimg = createImage(appwidth, appheight);
        offscr = offimg.getGraphics();
        offscr.setFont(new Font("Serif", 0, 12));
        setBackground(Color.lightGray);
    }
	//--------------------------------------------------------
    public void start()
    {
        thread = new Thread(this);
        thread.start();
    }
	//--------------------------------------------------------
    public void stop()
    {
        thread.stop();
        thread = null;
    }
	//--------------------------------------------------------
    public void run()
    {
        if(image != null)
            try
            {
                mt.waitForID(0);
            }
            catch(InterruptedException _ex) { }
        do
        {
            try
            {
                Thread.currentThread();
                Thread.sleep(stime);
            }
            catch(InterruptedException _ex) { }
            repaint();
        } while(true);
    }
	//--------------------------------------------------------
    public void paint(Graphics g)
    {
        if(status == 0)
        {
            if(mt.checkID(0))
            {
                imgwidth = image.getWidth(this);
                imgheight = image.getHeight(this);
                if(mode == 3)
                    status = 6;
                else
                    status = 1;
            }
            offscr.setColor(Color.lightGray);
            offscr.fillRect(0, 0, appwidth, appheight);
            offscr.setColor(Color.black);
            offscr.drawString("Loading image", 10, 20);
        } else
        {
            offscr.drawImage(image, x, y, this);
            if(x < -(imgwidth - appwidth))
                offscr.drawImage(image, imgwidth + x, y, this);
            if(y < -(imgheight - appheight))
                offscr.drawImage(image, x, imgheight + y, this);
        }
        g.drawImage(offimg, 0, 0, this);
        if(mouseflag)
            showStatus("Panorama 1.1" + lookto());
    }
	//--------------------------------------------------------
    public void update(Graphics g)
    {
        switch(status)
        {
        case 0: // '\0'
            paint(g);
            return;
        case 1: // '\001'
            x = x - nowstep;
            switch(mode)
            {
            default:
                break;
            case 0: // '\0'
            case 3: // '\003'
                if(x <= -imgwidth + appwidth)
                {
                    x = -imgwidth + appwidth;
                    status = 4;
                }
                break;
            case 1: // '\001'
                if(x <= -imgwidth + appwidth)
                {
                    x = -imgwidth + appwidth;
                    status = 2;
                }
                break;
            case 2: // '\002'
                if(x <= -imgwidth)
                    x = 0;
                break;
            }
            paint(g);
            return;
        case 2: // '\002'
            x = x + nowstep;
            switch(mode)
            {
            default:
                break;
            case 0: // '\0'
            case 3: // '\003'
                if(x >= 0)
                {
                    x = 0;
                    status = 5;
                }
                break;
            case 1: // '\001'
                if(x >= 0)
                {
                    x = 0;
                    status = 1;
                }
                break;
            case 2: // '\002'
                if(x >= 0)
                    x = -imgwidth;
                break;
            }
            paint(g);
            return;
        case 6: // '\006'
            y = y - nowstep;
            switch(mode)
            {
            default:
                break;
            case 0: // '\0'
            case 2: // '\002'
                if(y <= -imgheight + appheight)
                {
                    y = -imgheight + appheight;
                    status = 8;
                }
                break;
            case 1: // '\001'
                if(y <= -imgheight + appheight)
                {
                    y = -imgheight + appheight;
                    status = 7;
                }
                break;
            case 3: // '\003'
                if(y <= -imgheight)
                    y = 0;
                break;
            }
            paint(g);
            return;
        case 7: // '\007'
            y = y + nowstep;
            switch(mode)
            {
            default:
                break;
            case 0: // '\0'
            case 2: // '\002'
                if(y >= 0)
                {
                    y = 0;
                    status = 9;
                }
                break;
            case 1: // '\001'
                if(y >= 0)
                {
                    y = 0;
                    status = 6;
                }
                break;
            case 3: // '\003'
                if(y >= 0)
                    y = -imgheight;
                break;
            }
            paint(g);
            return;
        }
    }
	//--------------------------------------------------------
    public boolean mouseEnter(Event event, int i, int j)
    {
        mouseflag = true;
        showStatus("Panorama 1.1" + lookto());
        return true;
    }
	//--------------------------------------------------------
    public boolean mouseUp(Event event, int i, int j)
    {
        double d = i;
        double d1 = j;
        double d2 = appwidth;
        double d3 = appheight;
        int k;
        if(d / d1 < d2 / d3)
        {
            if(d / (d3 - d1) < d2 / d3)
                k = 2;
            else
                k = 6;
        } else
        if(d / (d3 - d1) < d2 / d3)
            k = 7;
        else
            k = 1;
        if(d >= d2 / 3D && d <= (d2 / 3D) * 2D && d1 >= d3 / 3D && d1 <= (d3 / 3D) * 2D)
            k = 3;
        if(k == status)
        {
            nowstep += nowstep;
            if(nowstep >= 32)
                nowstep = 32;
        }
        if(k == 3)
            nowstep = 2;
        status = k;
        showStatus("Panorama 1.1" + lookto());
        return true;
    }
	//--------------------------------------------------------
    public boolean mouseExit(Event event, int i, int j)
    {
        mouseflag = false;
        showStatus("");
        return true;
    }
	//--------------------------------------------------------
    String lookto()
    {
        if(status == 0)
            return " ... Loading image...";
        if(status == 1)
            return " ... See Right!";
        if(status == 2)
            return " ... See Left!";
        if(status == 3)
            return " ... Pause!";
        if(status == 4)
            return " ... Right End!";
        if(status == 5)
            return " ... Left End!";
        if(status == 6)
            return " ... See Down!";
        if(status == 7)
            return " ... See Up!";
        if(status == 8)
            return " ... Down End!";
        if(status == 9)
            return " ... Up End!";
        else
            return " ... Error!";
    }
}