//
//  newAngle.java
//  newAngle
//
//  Created by Chris Thiel on Sat Sep 21 2002.
//  Copyright (c) 2002 Chris Thiel. All rights reserved.
//  Educational use is free with permission 
//  send an email to me at cct@ktb.net 
//
//  A simple Java applet that helps a student
//  coordinate co-ords to form angles that are
//  bisectors or vertical angles.
//
//  ver 1.0 -21 Sept 02-
//  ver 1.1 -22 Sept 02- Adds checkbox for minor arc angle measurement.
//  ver 1.2 -17 Sept 03 - adjusted panels

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.util.EventListener;

public class newAngle extends Applet implements ActionListener,MouseListener {
    myCanvas canvas; 
    Panel np=new Panel();
    Panel wp=new Panel();
    Panel cp=new Panel();
    Panel sp=new Panel();
    Panel ep=new Panel();
    Label l1=new Label("co-ords ");
    Label l2=new Label("  x");
    Label l3=new Label("  y");
    Label lA=new Label("  A");
    Label lB=new Label("  B");
    Label lC=new Label("  C");// not used
    TextField Ax=new TextField("50",5);
    TextField Ay=new TextField("20",5);
    TextField Bx=new TextField("40",5);
    TextField By=new TextField("-20",5);
    TextField Cx=new TextField(5);//not used
    TextField Cy=new TextField(5);//not used
    
    Button redrawBtn=new Button("Redraw");
    Checkbox minorArc=new Checkbox("Always measure the minor angle");
    public void mouseClicked(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mousePressed(MouseEvent e){
  if (e.getSource()==minorArc){  
    canvas.ax=Float.valueOf(Ax.getText()).doubleValue() ;
    canvas.ay=Float.valueOf(Ay.getText()).doubleValue() ;
    canvas.bx=Float.valueOf(Bx.getText()).doubleValue() ;
    canvas.by=Float.valueOf(By.getText()).doubleValue() ;
    canvas.minorArc=!minorArc.getState();//opposite, since not yet changed
    canvas.repaint(); 
    }
}    
    public void init() {
       setLayout(new BorderLayout());
        add("North",np);
        np.setBackground(Color.orange);
        //set up check box
        minorArc.addMouseListener(this);
        np.add(minorArc);
 
 //       add("Center",cp);
 //       cp.setBackground(Color.yellow);
        canvas= new myCanvas();
        add("Center", canvas );
        canvas.setSize(200,300); 
        add("South",sp);
        sp.setBackground(Color.red);
        add("West", wp);
        wp.setBackground(Color.cyan);
        add("East", ep);
        ep.setBackground(Color.orange);
        redrawBtn.addActionListener(this);
        sp.add(redrawBtn);
        wp.setLayout(new GridLayout(4,3));
        wp.add(l1);
        wp.add(l2);
        wp.add(l3);
        wp.add(lA);
        wp.add(Ax);
        wp.add(Ay);
        wp.add(lB);
        wp.add(Bx);
        wp.add(By);
        //wp.add(lC);
        //wp.add(Cx);
        //wp.add(Cy);
repaint();		
}
    public void actionPerformed(ActionEvent e){ 

    canvas.ax=Float.valueOf(Ax.getText()).doubleValue() ;
    canvas.ay=Float.valueOf(Ay.getText()).doubleValue() ;
    canvas.bx=Float.valueOf(Bx.getText()).doubleValue() ;
    canvas.by=Float.valueOf(By.getText()).doubleValue() ;
    canvas.minorArc=minorArc.getState();
    canvas.repaint(); 
    
} 
    public void paint (Graphics g) {
       
    }
}
class myCanvas extends Canvas { 
private Font font = new Font("serif", Font.ITALIC + Font.BOLD, 14);
public String t;
public double ax=50.0;
public double ay=20.0;
public double bx=40.0;
public double by=-20.0;
public boolean minorArc=false;
 myCanvas(){ 
	 
	setBackground(Color.yellow); 
 } 
private int sX(double x){
    return (int)(5*x);
}
private int sY(double y){
    return 125-(int)(5*y);
}
private double angleA(){
    double d=Math.sqrt((sY(ay)-sY(0))*(sY(ay)-sY(0))+(sX(ax)-150)*(sX(ax)-150));
    double acute= (180/Math.PI)*Math.asin((sY(0)-sY(ay))/d);
    if (acute<0) acute *= -1;
    if ((sX(ax)>150)&&(sY(ay)>=sY(0))) acute = acute+180;//bottom right
    if ((sX(ax)>150)&&(sY(ay)<sY(0))) acute = 180-acute;//top right
    if ((sX(ax)<=150)&&(sY(ay)>=sY(0))) acute = 360-acute;//bottom left
    if ((minorArc)&&(acute>180)) acute=360-acute;
    acute=.1*(int)(acute*10);
    return acute;
}
private double angleB(){
    double d=Math.sqrt((sY(by)-sY(0))*(sY(by)-sY(0))+(sX(bx)-150)*(sX(bx)-150));
    double acute= (180/Math.PI)*Math.asin((sY(0)-sY(by))/d);
    if (acute<0) acute *= -1;
    if ((sX(bx)>150)&&(sY(by)>=sY(0))) acute = acute;//bottom right
    if ((sX(bx)>150)&&(sY(by)<=sY(0))) acute = 360-acute;//top right
    if ((sX(bx)<=150)&&(sY(by)>=sY(0))) acute = 180-acute;//bottom left
    if ((sX(bx)<=150)&&(sY(by)<sY(0))) acute = 180+acute;//top left
    if ((minorArc)&&(acute>180)) acute=360-acute;
    acute=.1*(int)(acute*10);

    return acute;
}
public void paint( Graphics g ){ 

 g.setColor(Color.black); 

    g.setColor(Color.blue);
    g.setFont(font);
    g.drawString("m<AOC = "+angleA()+"¡", 10, 15);
    g.drawString("m<BOD = "+angleB()+"¡", 10, 235);

    g.drawString("A",sX(ax),sY(ay) );
    g.drawString("B",sX(bx),sY(by) );
     g.drawString("O",150,sY(0) );
      g.drawString("C",5,sY(0) );
       g.drawString("D",295,sY(0) );
   g.setColor(Color.black);
   g.drawLine(1,sY(0),295,sY(0));
   g.drawLine(150,sY(0),sX(ax),sY(ay));
   g.drawLine(150,sY(0),sX(bx),sY(by));
     } 
}