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

public class Lines extends Applet
{
	final int MAXLINES = 100;
	Point starts[] = new Point[MAXLINES];
	Point ends[] = new Point[MAXLINES];
	Color shades[] = new Color[MAXLINES];
	Point anchor = null;
	Point currpoint;
	Color currcolor = Color.black;
	int currline = 0;
	Font f = new Font("Times", Font.PLAIN, 12);
	FontMetrics fm = getFontMetrics(f);
	int clearL, clearR, deleteL, deleteR;
	
	public void init() {
		setBackground(Color.white);
		repaint();
	}
	
	public boolean mouseDown(Event evt, int x, int y) {
		if (y<30) {
			if (y>10) {
				if ((x>10) && (x<30)) currcolor = Color.red;
				else if ((x>40) && (x<60)) currcolor = Color.orange;
				else if ((x>70) && (x<90)) currcolor = Color.green;
				else if ((x>100) && (x<120)) currcolor = Color.blue;
				else if ((x>130) && (x<150)) currcolor = Color.black;
				else if ((x>clearL) && (x<clearR)) {currline = 0;repaint();}
				else if ((x>deleteL) && (x<deleteR)) {currline--;repaint();}
			}
		}
		else {
			anchor = new Point(x,y);
		}
		return true;
	}
	
	public boolean mouseUp(Event evt, int x, int y) {
		if ((anchor != null) && (y > 30)) {
			if (currline < MAXLINES) addline(x,y);
			else System.out.println("Ran out of lines");
		}
		anchor = null;
		return true;
	}
	
	public boolean mouseDrag(Event evt, int x, int y) {
		if (anchor != null) {
			currpoint = new Point(x,y);
			repaint();
		}
		return true;
	}
	
	void addline(int x, int y) {
		starts[currline] = anchor;
		ends[currline] = new Point(x,y);
		shades[currline] = currcolor;
		currline++;
		currpoint = null;
		anchor = null;
		repaint();
	}
	
	public void paint( Graphics g ) {
		g.setColor(Color.red);
		g.fillRect(10,10,20,20);
		g.setColor(Color.orange);
		g.fillRect(40,10,20,20);
		g.setColor(Color.green);
		g.fillRect(70,10,20,20);
		g.setColor(Color.blue);
		g.fillRect(100,10,20,20);
		g.setColor(Color.black);
		g.fillRect(130,10,20,20);
		g.setFont(f);
		clearL = 165;
		clearR = 175+fm.stringWidth("Clear");
		g.drawString("Clear",165,25);
		g.drawRect(160,10,fm.stringWidth("Clear")+10,20);
		deleteL = clearR+10;
		deleteR = deleteL+10+fm.stringWidth("Delete");
		g.drawString("Delete",clearR+15,25);
		g.drawRect(clearR+10,10,fm.stringWidth("Delete")+10,20);
		
		for (int i=0; i<currline; i++) {
			g.setColor(shades[i]);
			g.drawLine(starts[i].x, starts[i].y,
						ends[i].x, ends[i].y);
		}
		
		if (currpoint != null) {
			g.setColor(currcolor);
			g.drawLine(anchor.x, anchor.y,
					currpoint.x, currpoint.y);
		}
	}

}