//******************************************************************************
// Test1.java:	Applet
//
//******************************************************************************
import java.applet.*;
import java.awt.*;

//==============================================================================
// Main Class for applet Test1
//
//==============================================================================
public class Test1 extends Applet implements Runnable
{
	// THREAD SUPPORT:
	//		m_Test1	is the Thread object for the applet
	//--------------------------------------------------------------------------
	private Thread	 m_Test1 = null;

	// ANIMATION SUPPORT:
	//		m_Graphics		used for storing the applet's Graphics context
	//		m_Images[]		the array of Image objects for the animation
	//		m_nCurrImage	the index of the next image to be displayed
	//		m_ImgWidth		width of each image
	//		m_ImgHeight		height of each image
	//		m_fAllLoaded	indicates whether all images have been loaded
	//		NUM_IMAGES 		number of images used in the animation
	//--------------------------------------------------------------------------
	private Graphics m_Graphics;
	private Image	 m_Images[];
	private int 	 m_nCurrImage;
	private int 	 m_nImgWidth  = 0;
	private int 	 m_nImgHeight = 0;
	private boolean  m_fAllLoaded = false;
	private final int NUM_IMAGES = 18,xsize=600,ysize=350,xoff=50,yoff=50,dx=7,dy=7;
	private int last_x=50;
	private int last_y=400,last_my,last_mmy;
	private int last_nny,nny;

	private boolean stop_toggle=false;
	private final int NSTEPS=50;
	private int[] ssn =new int[NSTEPS]; 
	private int nstep,ni=5,enn=0,eus=0;

	// Test1 Class Constructor
	//--------------------------------------------------------------------------
	public Test1()
	{
		// TODO: Add constructor code here
	}

	// APPLET INFO SUPPORT:
	//		The getAppletInfo() method returns a string describing the applet's
	// author, copyright date, or miscellaneous information.
    //--------------------------------------------------------------------------
	public String getAppletInfo()
	{
		return "Name: Test1\r\n" +
		       "Author: Andrew Conway\r\n" +
		       "Created with Microsoft Visual J++ Version 1.1";
	}


	// The init() method is called by the AWT when an applet is first loaded or
	// reloaded.  Override this method to perform whatever initialization your
	// applet needs, such as initializing data structures, loading images or
	// fonts, creating frame windows, setting the layout manager, or adding UI
	// components.
    //--------------------------------------------------------------------------
	public void init()
	{
        // If you use a ResourceWizard-generated "control creator" class to
        // arrange controls in your applet, you may want to call its
        // CreateControls() method from within this method. Remove the following
        // call to resize() before adding the call to CreateControls();
        // CreateControls() does its own resizing.
        //----------------------------------------------------------------------
    	resize(xsize, ysize);
	for(nstep=0;nstep<NSTEPS;nstep++)
		ssn[nstep]=yoff+(ysize-2*yoff)/2+(int) (20.0*(Math.random()-0.5))
		+(int) (100.0*Math.sin((double)nstep*0.3));
	nstep=0;

	last_nny=last_y=ssn[ni-1];
		// TODO: Place additional initialization code here
	}

	// Place additional applet clean up code here.  destroy() is called when
	// when you applet is terminating and being unloaded.
	//-------------------------------------------------------------------------
	public void destroy()
	{
		// TODO: Place applet cleanup code here
	}

    // ANIMATION SUPPORT:
    //		Draws the next image, if all images are currently loaded
    //--------------------------------------------------------------------------
	private void displayImage(Graphics g)
	{
		if (!m_fAllLoaded)
			return;

		// Draw Image in center of applet
		//----------------------------------------------------------------------
		g.drawImage(m_Images[m_nCurrImage],0,0,null);
//				   (size().width - m_nImgWidth)   / 2,
//				   (size().height - m_nImgHeight) / 2, null);

	}

	// Test1 Paint Handler
	//--------------------------------------------------------------------------
	public void paint(Graphics g)
	{
		// ANIMATION SUPPORT:
		//		The following code displays a status message until all the
		// images are loaded. Then it calls displayImage to display the current
		// image.
		//----------------------------------------------------------------------
		if (m_fAllLoaded)
		{
			//Rectangle r = g.getClipRect();
			g.setColor(Color.white);
			//g.clearRect(r.x, r.y, r.width, r.height);
			g.fillRect(xoff,yoff,xsize-2*xoff+dx,ysize-2*yoff+dy);
			g.setColor(Color.black);
//			g.drawLine(xoff,yoff,xoff,ysize-yoff);
//			g.drawLine(xoff,ysize-yoff,xsize-xoff,ysize-yoff);
			g.fillRect(95, 8,300, 16);
			m_Graphics.setColor(Color.green);
			m_Graphics.drawString("Neural Net Error: ",300,20);
			m_Graphics.setColor(Color.red);
			m_Graphics.drawString("Your Error: ",100,20);

			displayImage(g);
		}
		else
			g.drawString("Loading images...", 10, 20);
		
		// TODO: Place additional applet Paint code here
	}

	//		The start() method is called when the page containing the applet
	// first appears on the screen. The AppletWizard's initial implementation
	// of this method starts execution of the applet's thread.
	//--------------------------------------------------------------------------
	public void start()
	{
		if (m_Test1 == null)
		{
			m_Test1 = new Thread(this);
			m_Test1.start();
		}
		// TODO: Place additional applet start code here
	}
	
	//		The stop() method is called when the page containing the applet is
	// no longer on the screen. The AppletWizard's initial implementation of
	// this method stops execution of the applet's thread.
	//--------------------------------------------------------------------------
	public void stop()
	{
		if (m_Test1 != null)
		{
			m_Test1.stop();
			m_Test1 = null;
		}

		// TODO: Place additional applet stop code here
	}

	// THREAD SUPPORT
	//		The run() method is called when the applet's thread is started. If
	// your applet performs any ongoing activities without waiting for user
	// input, the code for implementing that behavior typically goes here. For
	// example, for an applet that performs animation, the run() method controls
	// the display of images.
	//--------------------------------------------------------------------------
	public void run()
	{
		m_nCurrImage = 0;
		
		// If re-entering the page, then the images have already been loaded.
		// m_fAllLoaded == TRUE.
		//----------------------------------------------------------------------
        if (!m_fAllLoaded)
		{
    		repaint();
    		m_Graphics = getGraphics();
    		m_Images   = new Image[NUM_IMAGES];

    		// Load in all the images
    		//------------------------------------------------------------------
    		MediaTracker tracker = new MediaTracker(this);
    		String strImage;

    		// For each image in the animation, this method first constructs a
    		// string containing the path to the image file; then it begins
    		// loading the image into the m_Images array.  Note that the call to
    		// getImage will return before the image is completely loaded.
    		//------------------------------------------------------------------
    		for (int i = 1; i <= NUM_IMAGES; i++)
    		{
    			// Build path to next image
    			//--------------------------------------------------------------
    			strImage = "images/img00" + ((i < 10) ? "0" : "") + i + ".gif";
			    m_Images[i-1] = getImage(getDocumentBase(), strImage);

                tracker.addImage(m_Images[i-1], 0);
    		}

    		// Wait until all images are fully loaded
    		//------------------------------------------------------------------
			try
			{
				tracker.waitForAll();
				m_fAllLoaded = !tracker.isErrorAny();
			}
			catch (InterruptedException e)
			{
				// TODO: Place exception-handling code here in case an
				//       InterruptedException is thrown by Thread.sleep(),
				//		 meaning that another thread has interrupted this one
			}
			
			if (!m_fAllLoaded)
			{
			    stop();
			    m_Graphics.drawString("Error loading images!", 10, 40);
			    return;
			}
			

			// Assuming all images are same width and height.
			//--------------------------------------------------------------
		    m_nImgWidth  = m_Images[0].getWidth(this);
		    m_nImgHeight = m_Images[0].getHeight(this);
			

        
		}		
		repaint();

		while (true)
		{
			try
			{
				// Draw next image in animation
				//--------------------------------------------------------------
			
//				m_Graphics.clearRect(0, 0, 200, 200);
				displayImage(m_Graphics);

				//m_Graphics.drawString(emma[m_nCurrImage%4], 10+30*(m_nCurrImage%4), 100);

				m_nCurrImage++;
				if (m_nCurrImage == NUM_IMAGES)
				{
					//m_Graphics.drawString("Stopped!", 10, 100);
					m_nCurrImage = 0;
					if(nstep==0)
					{
						m_Graphics.setColor(Color.black);
						m_Graphics.drawOval(xoff+10*nstep-dx/2,(int) ssn[nstep]-dy/2,dx,dy);
						last_x=xoff+nstep*10; 
						nstep++;
					}

					m_Graphics.setColor(Color.black);
					m_Graphics.drawLine(last_x,(int) ssn[nstep-1],xoff+10*nstep,(int) ssn[nstep]);
					m_Graphics.drawOval(xoff+10*nstep-dx/2,(int) ssn[nstep]-dy/2,dx,dy);
					last_x=xoff+nstep*10; 
					nstep++;
					if(nstep>=ni)
					{
						stop_toggle=true;
						m_Graphics.setColor(Color.red);
						m_Graphics.drawOval(xoff+nstep*10-dx/2,last_mmy-dy/2,dx,dy);
						last_my=last_mmy;
						m_Test1.suspend();
					}
				}
				// TODO:  Add additional thread-specific code here
				else
					Thread.sleep(50);
			}
			catch (InterruptedException e)
			{
				// TODO: Place exception-handling code here in case an
				//       InterruptedException is thrown by Thread.sleep(),
				//		 meaning that another thread has interrupted this one
				stop();
			}
		}
	}

	// MOUSE SUPPORT:
	//		The mouseDown() method is called if the mouse button is pressed
	// while the mouse cursor is over the applet's portion of the screen.
	//--------------------------------------------------------------------------
	public boolean mouseDown(Event evt, int x, int y)
	{
		double fenn,feus;
		if(stop_toggle) 
		{
			if(y>yoff && y<=ysize-yoff-dy/2 && nstep<NSTEPS)
			{
				m_Graphics.setColor(Color.red);
				m_Graphics.drawLine(last_x,last_y,xoff+nstep*10,y);
				m_Graphics.setColor(Color.green);
				nny=(int)neuralnet(nstep);
				m_Graphics.drawLine(last_x,last_nny,xoff+nstep*10,nny);
				last_y=y; last_nny=nny;
				enn+=(nny-ssn[nstep])*(nny-ssn[nstep]);
				eus+=(y-ssn[nstep])*(y-ssn[nstep]);
				fenn=Math.sqrt((double)enn/(double) (nstep-ni+1));
				feus=Math.sqrt((double)eus/(double) (nstep-ni+1));
				m_Graphics.setColor(Color.black);				
				m_Graphics.fillRect(95, 8,300, 16);
				m_Graphics.setColor(Color.green);
				m_Graphics.drawString("Neural Net Error: "+(int)fenn,300,20);
				m_Graphics.setColor(Color.red);
				m_Graphics.drawString("Your Error: "+(int)feus,100,20);
				m_Test1.resume();
				stop_toggle=false;
			}
			else if(nstep==NSTEPS)
			{
				stop();
			}
		}	

		return true;
	}

	public boolean mouseMove(Event evt, int x, int y)
	{
		if(stop_toggle && y>yoff && y<=ysize-yoff-dy/2 && nstep<NSTEPS)
		{
			m_Graphics.setColor(Color.white);
			m_Graphics.drawOval(xoff+nstep*10-dx/2,last_my-dy/2,dx,dy);
			m_Graphics.setColor(Color.red);
			m_Graphics.drawOval(xoff+nstep*10-dx/2,y-dy/2,dx,dy);
			last_my=y;
		}
		last_mmy=y;
		return true;
	}
	// MOUSE SUPPORT:
	//		The mouseUp() method is called if the mouse button is released
	// while the mouse cursor is over the applet's portion of the screen.
	//--------------------------------------------------------------------------
	public boolean mouseUp(Event evt, int x, int y)
	{
		// TODO: Place applet mouseUp code here
		return true;
	}

	public int neuralnet(int nstep)
	{
		return ssn[nstep-1]+ (int)
			((double)(ssn[nstep-1]-ssn[nstep-ni])/(double) (ni-1));
	}
	// TODO: Place additional applet code here

}