import objectdraw.*;
import java.awt.*;

/* A program that draws perpendicular lines that move
 so that they always intersect at the mouse's current
 position */
public class CrossHairs extends WindowController {

	private Line vert, horiz; // lines forming crosshairs

	private int canvasWidth, canvasHeight;

	// Initially center the lines
	public void begin() {
		canvasWidth = canvas.getWidth();
		canvasHeight = canvas.getHeight();

		vert = new Line(canvasWidth / 2, 0, canvasWidth / 2, canvasHeight,
				canvas);
		horiz = new Line(0, canvasHeight / 2, canvasWidth, canvasHeight / 2,
				canvas);
	}

	// move the lines so that they intersect at the mouse
	public void onMouseDrag(Location point) {
		vert.setEndPoints(point.getX(), 0, point.getX(), canvasHeight);

		horiz.setEndPoints(0, point.getY(), canvasWidth, point.getY());
	}

}