//TimePanel.java
import java.awt.*;
import java.awt.event.*;

class TimeMouseAdapter extends MouseAdapter implements MouseMotionListener
{
	TimePanel time;
	int startX=0, startY=0,endX=0,endY=0;

	public TimeMouseAdapter(TimePanel time)
	{
		super();
		this.time = time;
		time.addMouseMotionListener(this);
	}
	
	public void mousePressed(MouseEvent e)
	{
		startX = e.getX();
		startY = e.getY();
		time.EIN.setCursor(new Cursor(Cursor.HAND_CURSOR));
	}
	
	public void mouseClicked(MouseEvent e)
	{
		if (e.getClickCount() > 1)
		{
			time.offsetX = 0;
			time.offsetY = 0;
		}
	}
	
	public void mouseReleased(MouseEvent e)
	{
		time.EIN.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
		time.repaint();
	}
	
	public void mouseDragged(MouseEvent e)
	{
		time.EIN.setCursor(new Cursor(Cursor.MOVE_CURSOR));
		endX = e.getX();
		endY = e.getY();
		time.offsetX += endX - startX;
		time.offsetY += endY - startY;
		startX = endX;
		startY = endY;
		time.repaint();
	}
	public void mouseMoved(MouseEvent e)
	{}
						
}
				
public class TimePanel extends Panel
{
	int top_offset = 30;
	int offsetX=0,offsetY=0;
	public Einstein EIN;
	double margin = .1;
	double leftmargin = .1;
	double rightmargin = .1;
	double divide = 500;
	
	
	public double mapX(double percent)
	{
		Rectangle r = getBounds();
		double temp = (offsetX+(percent * r.width));
		//if (temp > (r.width-3)) return (r.width-3);
		//if (temp < 3) return 3;
		return temp;
	}
	
	public double mapY(double percent)
	{
		Rectangle r = getBounds();
		double temp = (offsetY+top_offset+(r.width - (percent * r.width)));
		//if (temp > (r.height-top_offset-3)) return (r.height-top_offset-3);
		//if (temp < (3+top_offset)) return (3+top_offset);
		//EIN.showStatus(""+temp);
		return temp;
	}
	
	public TimePanel(Einstein EIN)
	{
		this.EIN = EIN;
		setBackground(Color.white);
		this.addMouseListener(new TimeMouseAdapter(this));
	}
	
	public void update(Graphics g)
	{
		paint(g);
	}
	
	public String round(double num)
	{
		Double d = new Double(num);
		String sv = d.toString();
		int deci = sv.length() - sv.indexOf('.');
		if (deci > 2) deci = 2;
		int end = sv.indexOf('.')+deci;
		return sv.substring(0,end);
	}
	
	public void Arrow (double x0, double y0, double x1, double y1,Graphics g) 
	{
		double w, dw = 0.5, r = 5, dx = x1-x0, dy = y0-y1;
		g.drawLine((int)x0,(int)y0,(int)x1,(int)y1);
		w = Math.atan2(dy,dx);
		x0 = x1-r*Math.cos(w+dw)+0.5; 
		y0 = y1+r*Math.sin(w+dw)+0.5; 
		g.drawLine((int)x0,(int)y0,(int)x1,(int)y1);
		x0 = x1-r*Math.cos(w-dw)+0.5; 
		y0 = y1+r*Math.sin(w-dw)+0.5; 
		g.drawLine((int)x0,(int)y0,(int)x1,(int)y1);
    }
	
	public void drawPoint(double x, double t, Graphics g)
	{
		double xdraw = (x/(divide));
		double tdraw = (t/(divide));
		g.fillOval((int)mapX(margin+xdraw)-2,(int)mapY(margin+tdraw)-2,4,4);
	}
	
	public void drawLine(double x1, double t1, double x2, double t2, Graphics g)
	{
		double x1draw = (x1/(divide));
		double t1draw = (t1/(divide));
		double x2draw = (x2/(divide));
		double t2draw = (t2/(divide));
		g.drawLine((int)mapX(margin+x1draw),(int)mapY(margin+t1draw),(int)mapX(margin+x2draw),(int)mapY(margin+t2draw));
	}
	
	public void paint(Graphics gr2)
	{
		Rectangle temp = EIN.top_lab.getBounds();
		top_offset = temp.height+10;
		Rectangle r = getBounds();
		EIN.offscr2.setColor(Color.white);
		EIN.offscr2.fillRect(0,0,r.width,r.height);
		EIN.offscr2.setColor(new Color(207,107,34));
		EIN.offscr2.fillRect(0,top_offset,r.width-2,r.width-2);
		EIN.offscr2.setColor(Color.black);
		EIN.offscr2.drawLine(2,top_offset+r.width-1,r.width-1,top_offset+r.width-1);
		EIN.offscr2.drawLine(r.width-1,top_offset+2,r.width-1,top_offset+r.width-2);
		
		double scale_obs=0,scale_obj=0;
		Reality real = EIN.getReality();
		String obs_str = "Observer x= "+round(real.myX)+" t= "+round(real.myTime);
		String obj_str = "Object x= "+round(real.theirX)+" t= "+round(real.theirTime);
		if (EIN.frame == Reality.OBJECT_FRAME)
		{
			real = EIN.mover.getReality();	
			obs_str = "Observer x= "+round(real.theirX)+" t= "+round(real.theirTime);
			obj_str = "Object x= "+round(real.myX)+" t= "+round(real.myTime);
			scale_obs = Math.atan(real.getV());
		}
		else 
		{
			scale_obj = Math.atan(real.getV());
		}
		EIN.offscr2.setColor(Color.blue);
		Arrow(mapX(margin),mapY(margin),mapX(margin+(1-2*margin)*Math.cos(scale_obj)),mapY(margin+(1-2*margin)*Math.sin(scale_obj)),EIN.offscr2);
		Arrow(mapX(margin),mapY(margin),mapX(margin+(1-2*margin)*Math.sin(scale_obj)),mapY(margin+(1-2*margin)*Math.cos(scale_obj)),EIN.offscr2);
		EIN.offscr2.setColor(Color.red);
		Arrow(mapX(margin),mapY(margin),mapX(margin+(1-2*margin)*Math.cos(scale_obs)),mapY(margin+(1-2*margin)*Math.sin(scale_obs)),EIN.offscr2);
		Arrow(mapX(margin),mapY(margin),mapX(margin+(1-2*margin)*Math.sin(scale_obs)),mapY(margin+(1-2*margin)*Math.cos(scale_obs)),EIN.offscr2);
		EIN.offscr2.setColor(Color.black);
		EIN.offscr2.drawString("ct",(int)mapX(.05),(int)mapY(.5));
		EIN.offscr2.drawString("x",(int)mapX(.5),(int)mapY(.05));
		EIN.offscr2.setColor(Color.white);
		EIN.offscr2.fillRect(0,0,r.width,top_offset);
		EIN.offscr2.fillRect(0,top_offset+r.width,r.width,r.height - (top_offset+r.width));
		
		EIN.mover.timeDraw(EIN.frame,EIN.offscr2);
		
		EIN.offscr2.setColor(Color.white);
		EIN.offscr2.fillRect(0,0,r.width,top_offset-1);
		EIN.offscr2.fillRect(0,top_offset+r.width,r.width,r.height-r.width-top_offset);
		EIN.offscr2.setColor(Color.black);
		FontMetrics fm = getFontMetrics(EIN.offscr2.getFont());
		EIN.offscr2.drawString(obs_str,(r.width-fm.charsWidth(obs_str.toCharArray(),0,obs_str.length()))/2,3+(int)(r.height-(fm.getHeight()/2)));
		if (EIN.mover == null)
			obj_str = "Choose experiment or click on Java TA to start";	
		EIN.offscr2.drawString(obj_str,(r.width-fm.charsWidth(obj_str.toCharArray(),0,obj_str.length()))/2,5+fm.getHeight());
		
		gr2.drawImage(EIN.image2,0,0,this);
	}
	
}