GD - Rectangle.java

package gd;

import java.awt.Graphics;

/**
 * A specific shape: A rectangle.
 * This rectangle inherits from Shape.
 * @author hypesystem
 * @email  [email protected]
 */
public class Rectangle extends Shape implements Drawable, DrawableAndMovable {
    private double width, height;

    /**
     * Creates a rectangle witout a coordinate argument (sets coordinates to
     * 0,0).
     * @param width width of rectangle
     * @param height height of rectangle
     */
    public Rectangle(double width, double height) {
        super(new Coordinate(0,0));
        setAttr(width, height);
    }

    /**
     * Creates a rectangle with a coordinate argument.
     * @param width width of rectangle
     * @param height height of rectangle
     * @param coordinates coordinates of rectangle.
     */
    public Rectangle(double width, double height, Coordinate coordinates) {
        super(coordinates);
        setAttr(width, height);
    }

    /**
     * Sets the attributes of the Rectangle. Called from constructors (hence
     * private)
     * @param width width of rectangle
     * @param height height of rectangle
     */
    private void setAttr(double width, double height) {
        this.width = width;
        this.height = height;
    }

    /**
     * Calculates and returns the circumference of the rectangle. Inherited from
     * Shape.
     * @return circumference of rectangle
     */
    @Override
    public double circumference() {
        return 2 * (width + height);
    }

    /**
     * Calculates and returns the area of the rectangle Inherited from Shape.
     * @return area of rectangle
     */
    @Override
    public double area() {
        return (width * height);
    }

    /**
     * Counts the amount of simple shapes in this shape. This is a simple shape.
     * Inherited from Shape.
     * @return 1
     */
    @Override
    public int countSimple() {
        return 1;
    }

    /**
     * Draws the rectangle to a specified graphic. Implemented from Drawable.
     * @param g graphic to draw to
     */
    @Override
    public void draw(Graphics g) {
        g.fillRect(getCoordinate().getX(), getCoordinate().getY(),
                (int)width, (int)height);
    }
}