import java.awt.*;
import java.applet.*;
import java.lang.*;
/*
	OilLine is an Applet that uses form data in a HTML Document
	(using Javascript), to draw a pipeline and two stations to study
	various strategies for finding the least distance using simple
	notions from a High SChool Geometry Course.
	
	inputs include the location and color of the pumping station S
	and the two locations A and B.
	
	This is designed to help students discover parallel lines and complementary angles.
	
	version 1.0 Novenber 5, 1998 -- Fr. Chris Thiel <cct@ktb.net>
*/

public class OilLine extends Applet
{
	// globals
	String Title="";
	int x[];
	int y[];
	int bx=0;
	int by=0;
	int hw =0;
	Object color[];
	int n=3; //number of dots
	int yMax=200;
	
	float deltaX=0; 
	float deltaY=0;
	boolean hint=false;
	boolean simple=false;
	double x0=0;
	double y0=0;
	 Image img = null;
	int bgcolor =0;
	// the code...
	public  void init() {
	   
	   bgcolor = Integer.parseInt(getParameter("bgcolor"));
	   setBackground(new Color(bgcolor));
	   img = getImage(getCodeBase(), "topomap.gif");
	    
	    String s;
		Title = new String("Press Redraw to Update");
		
		// set up the array of balls
		x = new int[n];
		y = new int[n];
		color = new Color[n];
		
		
		repaint();
	}
	
	public void paint( Graphics g ) {

	   if (!simple) {g.drawImage (img, 0,0,null);}
		g.drawString(Title, 30, 30 );
		
	    g.setColor(new Color(0xF08080)); //coral
		g.fillOval(x[0]-5, y[0]-10, 25, 15);
		//draw hint lines
		if (hint) {
		  hw = Math.round((y[2]-100)/2);
		  g.setColor(Color.green);
		  g.drawLine(x[2],200-y[2],x[2],y[2]);
		  g.drawLine(x[2],90,x[2]-10,90);
		  g.drawLine(x[2]-10,90,x[2]-10,90);
		  g.drawLine(x[2]-10,90,x[2]-10,99);
		  g.drawLine(x[2]+5,100+hw,x[2]-5,100+hw);
		  g.drawLine(x[2]-5,100-hw,x[2]+5,100-hw);
		  g.drawLine(x[2]-10,99,x[2],99);
		 
		   
		  g.drawLine(x[1],y[1],x[2],200-y[2]);
		}
		// 
		g.setColor((Color)color[1]);
		g.fillRect(x[1]-5, y[1]-5, 11, 11);
		g.drawLine(x[0],y[0],x[1],y[1]);
		
		g.setColor((Color)color[2]);
		g.fillRect(x[2]-5, y[2]-5, 11, 11);
		g.drawLine(x[0],y[0],x[2],y[2]);
		g.setColor(Color.yellow);
		
		//draw labels	
		
		g.setColor(Color.black);
		g.drawString(Integer.toString(x[0]), x[0],100);
		g.drawString("A", x[1]-3,y[1]+4);
		g.drawString("B", x[2]-3,y[2]+4);
		
		
		
		// make reference marks
		for (int j=25; j< 300; j = j+25){ 
		    g.drawLine(j,200,j,195); 
     	    g.drawLine(j,0,j,5); 
		    }
		for (int j=25; j< 200; j = j+25){ 
		    g.drawLine(0,j,5,j); 
     	    g.drawLine(295,j,300,j); 
		    }    
		 //draw the oilLIne 
		 g.setColor(Color.black);
		 g.fillRect(0,99,300,2);
		   // g.drawLine(bx[0],by[0],bx[1],by[1]);
		
			
			//g.fillOval(x[i]-1, y[i]-1, 3, 3);
			// g.fillOval(x[i+1]-1, y[i+1]-1, 3, 3);
		
		
	}
	public void setString(String aString) {
		Title = aString;
		repaint();
	}
	
	public void setHint (int hintValue) {
		if(hintValue==0) {hint=false;} else {hint=true;}
	}
	
	public void setSimple(int simpleValue) {
	    if(simpleValue==0) {simple=false;} else {simple=true;}
	}
	
	 
	public void setPoint( int i, float xpt, float ypt, String colour) {
		x[i-1] = (int)(xpt);
		y[i-1] = 200-(int)(ypt);
		deltaX = x[1]-x[2];
		deltaY = y[1]-y[2];
		if (colour != null) {
		 if (colour.equals("red")) {
                    color[i-1] = Color.red;
                } else if (colour.equals("green")) {
                    color[i-1] = Color.green;
                } else if (colour.equals("blue")) {
                    color[i-1] = Color.blue;
                } else if (colour.equals("pink")) {
                    color[i-1] = Color.pink;
                } else if (colour.equals("orange")) {
                    color[i-1] = Color.orange;
                } else if (colour.equals("magenta")) {
                    color[i-1] = Color.magenta;
                } else if (colour.equals("cyan")) {
                    color[i-1] = Color.cyan;
                } else if (colour.equals("white")) {
                    color[i-1] = Color.white;
                } else if (colour.equals("yellow")) {
                    color[i-1] = Color.yellow;
                } else if (colour.equals("gray")) {
                    color[i-1] = Color.gray;
                } else if (colour.equals("darkGray")) {
                    color[i-1] = Color.darkGray;
                } else {
                    color[i-1] = Color.black;
                }
            } else {
                color[i-1] = Color.black;
            }
		repaint();
	}

}