import java.awt.*;
import java.applet.*;
import shape;
import circle;
import square;
//animates three shape objects to form a heart in the end- what lab does this sound similar to?
public class Centergrav extends Applet implements Runnable
{
	public shape[] heartparts;		//The three shapes in this array create the heart
	Thread anim;
	public int framecount, delay;
	public void init()
	{
		setSize(400, 400);
		setBackground(Color.black);
		heartparts = new shape[3];
		heartparts[0] = new square(200, 200);
		heartparts[1] = new circle(166, 166);
		heartparts[2] = new circle(234, 166);
		framecount=0;
		delay=80;
	}
	public void paint(Graphics g)
	{
		g.setColor(Color.red);
		if (framecount<3)		//means "if the heart hasn't settled yet"
		{
			g.clearRect(0,0,400,400);	//clear the canvas because I don't use repaint in run, just paint
			for (int i=0; i<3; i++)
			{
				heartparts[i].paint(g);
				heartparts[i].changevelocity();
				heartparts[i].changeposition();
			}
			if (heartparts[0].isStopped() && heartparts[1].isStopped() && heartparts[2].isStopped())
				framecount++;	//I have a few frames (3) once they're stopped to make sure they're in the right place
		}
		else				//else if the heart has settled, framecount counts the letters being drawn
		{
			delay=600;		//now that I'm just intermittantly painting letters, no reason to have a short delay
			g.setFont(new Font("Serif", Font.BOLD, 80));
			for (int i=0; i<3; i++)
				heartparts[i].paint(g);	//repaint the heart
			String message="I still";
			String printable;
			if (framecount<10)
				printable=message.substring(0, framecount-3);	//print as much of the string as I'm printing so far
			else
				printable=message;
			g.drawString(printable, 100, 90);
			if (framecount>11)				//if I'm done printing the words at the top, start on the words on the bottom
			{
				message="love you";
				if (framecount<19)
					printable=message.substring(0, framecount-11);
				else
					printable=message;
				g.drawString(printable, 60, 350);
				if (framecount>19)
					stop();
			}
			framecount++;
		}
	}
	public void start()
	{
		anim = new Thread(this);
		anim.start();
		//run();
	}
	public synchronized void stop()
	{
		anim = null;
		notify();
	}
	public synchronized void run()
	{
		while (Thread.currentThread()==anim)
		{
			paint(this.getGraphics());	//I paint without clearing so that it will go smoother when I'm printing the letters (the rest of it won't flicker)
			try
			{
				wait(delay);
			}
			catch (InterruptedException e)
			{
				return;
			}
		}
	}
}