import java.applet.*;
import java.awt.*;
import IDD_DIALOG1;

public class tree2 extends Applet
{
	IDD_DIALOG1 dlg;
	Graphics g;
	double LPX,LPY,ANGLE,branch;
	int n=8,st=20;
    double rscale=1.4,lscale=1.4;

public void init()
{
    	dlg=new IDD_DIALOG1(this);
		dlg.CreateControls();
		dlg.IDC_SCROLLBAR1.setValues(st,20,0,160);
        resize(320, 240);
	    g=getGraphics();
 }
			
	public void paint(Graphics g)
	{
        double x0,y0,leng,angle;
		x0=180.0; y0=50.0;
		leng=70.0;
		angle=90.0;
		branch=0+st;
		tree(n,x0,y0,leng,angle);
   	}

	public void tree(int n,double x0,double y0,double leng,double angle)
	{
		if (n==0)
			return;
		LPX=x0;LPY=y0;
		ANGLE=angle;
		move(leng);
		x0=LPX;y0=LPY;
		tree(n-1,x0,y0,leng/rscale,angle-branch);
		tree(n-1,x0,y0,leng/lscale,angle+branch);
	}
	
	public void move(double l)
	{
		double x,y,rd=3.14159/180;
		x=l*Math.cos(rd*ANGLE);y=l*Math.sin(rd*ANGLE);
		g.drawLine((int)LPX,300-(int)LPY,(int)(LPX+x),300-(int)(LPY+y));
		LPX=LPX+x;LPY=LPY+y;
	}
						
	public boolean handleEvent(Event evt) {
		if (evt.target==dlg.IDC_SCROLLBAR1){
			st=dlg.IDC_SCROLLBAR1.getValue();
		    dlg.IDC_EDIT1.setText(String.valueOf(st));
	    	repaint(); 
		return true;
		}
		if (evt.target==dlg.IDC_RADIO1 && evt.id==Event.ACTION_EVENT){	
			lscale=1.4;
		    repaint();
		return true;
	 	}
        if (evt.target==dlg.IDC_RADIO2 && evt.id==Event.ACTION_EVENT){	
			lscale=1.6;
		    repaint();
	  	return true;
	 	}
        if (evt.target==dlg.IDC_RADIO3 && evt.id==Event.ACTION_EVENT){	
			lscale=2;
	    	repaint();
		return true;
	 	}
    return true;
	}
}