import javafx.scene.canvas.GraphicsContext;
import javafx.scene.paint.Color;

/**
 * The Circle class centred at x and y.
 * 
 *
 * @author Dave Slemon
 */
public class Circle {

    private double radius;
    private Color color;
    private double x;
    private double y;
    
    

    public Circle( ) {
        this(10.0, Color.BLUE, 100, 100);
    }
    
    public Circle( double radius ) {
        this(radius, Color.BLUE, 100, 100);
    }
   
    public Circle( double radius, Color color, double x, double y ) {
        this. radius = radius;
        this.color = color;
        this.x = x;
        this.y = y;
    }    
    
     public void setRadius(double radius) {
        if (radius <= 0) {
            System.out.println("ERROR! Radius must be greater than 0. Not changed.");
        } else {
            this.radius = radius;
        }
    }
 
    
   
    
    public double getRadius() {
        return radius;
    }


    public double displayArea() {
        return Math.PI * radius * radius;
    }
    
    
    
    public double displayCircumference() {
        return 2 * Math.PI * radius;
    }

    
    
    public void draw(GraphicsContext gc) {
       
        gc.setFill(color);
        gc.fillOval(x - radius, y - radius, radius * 2, radius * 2);
        gc.strokeOval(x - radius, y - radius, radius * 2, radius * 2);
    }

    
    public boolean equals( Circle c ) {
        if (c.getRadius() == this.radius)
           return true;
        return false;
    }
    
 
    public String toString() {
        return  "Circle of radius = " + radius + ", x = " + x + ", y = " + y;
    }

}