わたべ学習塾

2001.2.16

/*
	A basic extension of the java.applet.Applet class
 */

import java.awt.*;
import java.applet.*;

public class Applet1 extends Applet implements Runnable
{
    Thread th;
    int  x,y,ang=0,n=4;
    double a=150,r;
    String col;
    double rad=(Math.PI)/180;
    boolean Flag=true;
    

	public void init()
	{
		// Take out this line if you don't use 

symantec.itools.net.RelativeURL or symantec.itools.awt.util.StatusScroller
		symantec.itools.lang.Context.setApplet(this);
	

		// This code is automatically generated by Visual Cafe when you add
		// components to the visual environment. It instantiates and initializes
		// the components. To modify the code, only use code syntax that matches
		// what Visual Cafe can generate, or Visual Cafe may be unable to back
		// parse your Java file into its visual environment.
		//{{INIT_CONTROLS
		setLayout(null);
		setSize(631,371);
		add(label1);
		label1.setBounds(528,108,67,25);
		choice1.addItem("1");
		choice1.addItem("2");
		choice1.addItem("3");
		choice1.addItem("4");
		choice1.addItem("5");
		choice1.addItem("6");
		choice1.addItem("7");
		choice1.addItem("8");
		choice1.addItem("9");
		choice1.addItem("10");
		try {
			choice1.select(3);
		}
		catch (IllegalArgumentException e) { }
		add(choice1);
		choice1.setBounds(528,156,85,25);
		choice2.addItem("10");
		choice2.addItem("20");
		choice2.addItem("30");
		choice2.addItem("40");
		choice2.addItem("50");
		choice2.addItem("100");
		choice2.addItem("150");
		choice2.addItem("200");
		choice2.addItem("250");
		choice2.addItem("300");
		choice2.addItem("350");
		choice2.addItem("400");
		try {
			choice2.select(1);
		}
		catch (IllegalArgumentException e) { }
		add(choice2);
		choice2.setBounds(528,204,85,25);
		//}}
	

		//{{REGISTER_LISTENERS
		SymMouse aSymMouse = new SymMouse();
		this.addMouseListener(aSymMouse);
		SymItem lSymItem = new SymItem();
		choice1.addItemListener(lSymItem);
		choice2.addItemListener(lSymItem);
		//}}
	}
	

	//{{DECLARE_CONTROLS
	java.awt.Label label1 = new java.awt.Label();
	java.awt.Choice choice1 = new java.awt.Choice();
	java.awt.Choice choice2 = new java.awt.Choice();
	//}}
	public void start()
	{
	    if(th==null)
	    {
	        th=new Thread(this);
	        th.start();
	    }
	}
	

	public void run()
	{
	    while(true)
	    {
	        ang=ang+1;
	        if (ang>361)
	        {
	            ang=0;
	        }
	        repaint();
	        try
	        {
	            th.sleep(50);
	        }
	        catch(InterruptedException e)
	        {
	        }
	    }
	}
	

	public void update(Graphics g)
	{
	    paint(g);
	}

	public void paint(Graphics g)
    	{
        for (double angle=0;angle<361;angle=angle+0.5)
        {
            g.setColor(Color.blue);
            r=a*Math.sin(n*(rad*angle));
            x=(int)(r*Math.cos(rad*angle));
            y=(int)(r*Math.sin(rad*angle));
            
            g.drawLine(x+300, -y+200, x+300, -y+200);
        }
            label1.setText(""+ang);
            g.setColor(Color.white);
            r=a*Math.sin(n*(rad*ang));
            x=(int)(r*Math.cos(rad*ang));
            y=(int)(r*Math.sin(rad*ang));
            g.drawLine(x+300, -y+200, x+300, -y+200);

            //g.setColor(Color.black);
            //g.drawLine(10,200,600,200);
            //g.drawLine(300,10,300,400);
    }

    public void stop()
    {
        if(th !=null)
        {
            th.stop();
            th=null;
        }
    }

	class SymMouse extends java.awt.event.MouseAdapter
	{
		public void mouseClicked(java.awt.event.MouseEvent event)
		{
			Object object = event.getSource();
			if (object == Applet1.this)
				Applet1_MouseClicked(event);
		}
	}

	void Applet1_MouseClicked(java.awt.event.MouseEvent event)
	{
		// to do: code goes here.
		

		if (Flag==false)
		{

		    th.resume();
		    Flag=true;
		}
		else if (Flag==true)
		{
		    th.suspend();
		    Flag=false;	
		}	 
	}

	class SymItem implements java.awt.event.ItemListener
	{
		public void itemStateChanged(java.awt.event.ItemEvent event)
		{
			Object object = event.getSource();
			if (object == choice1)
				choice1_ItemStateChanged(event);
			else if (object == choice2)
				choice2_ItemStateChanged(event);
		}
	}

	void choice1_ItemStateChanged(java.awt.event.ItemEvent event)
	{
		// to do: code goes here.
		String st=choice1.getSelectedItem();
		n=Integer.parseInt(st);
		Graphics g=getGraphics();
		g.clearRect(0,0,getSize().width,getSize().height);
	}

	void choice2_ItemStateChanged(java.awt.event.ItemEvent event)
	{
		// to do: code goes here.
		String st=choice2.getSelectedItem();
		a=Double.valueOf(st).byteValue();
		Graphics g=getGraphics();
		g.clearRect(0,0,getSize().width,getSize().height);

	}
}

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