uni_informatik_projekt/src/break_out/model/Paddle.java

package break_out.model;

import break_out.Constants;

import java.awt.*;

/**
 * This class contains the information about the paddles characteristics and behavior
 *
 * @author Gruppe 175: Moritz Henseleit, Ruben Meyer
 */
public class Paddle implements IPaddle {

	/**
	 * The paddles position on the playground
	 */
	private Position position;

	/**
	 * The paddles direction on the playground
	 * only -1,0,+1 are valid values
	 */
	private int direction;

	/**
	 * The paddles sizing
	 */
	private int width;
	private int height;

	/**
	 * The paddles color
	 */
	private Color color;

	/**
	 * The constructor of a paddle
	 *
	 * @param position paddles initial position
	 */
	public Paddle(Position position) {
		this.position = position;

		// set sizing
		width = Constants.PADDLE_WIDTH;
		height = Constants.PADDLE_HEIGHT;

		// set color
		color = Color.CYAN;
	}

	/**
	 * The getter for the paddles position
	 *
	 * @return position The paddles current position
	 */
	public Position getPosition() {
		return position;
	}

	/**
	 * The setter for the paddles position
	 *
	 * @param position The paddles new position
	 */
	public void setPosition(Position position) {
		this.position = position;
	}

	/**
	 * The getter for the paddles color
	 *
	 * @return color The paddles current color
	 */
	public Color getColor() {
		return color;
	}

	/**
	 * The setter for the paddles color
	 *
	 * @param color The paddles new color
	 */
	public void setColor(Color color) {
		this.color = color;
	}

	/**
	 * The getter for the paddles width
	 *
	 * @return width The paddles current width
	 */
	public int getWidth() {
		return width;
	}

	/**
	 * The setter for the paddles width
	 *
	 * @param width The paddles new width
	 */
	public void setWidth(int width) {
		this.width = width;
	}

	/**
	 * The getter for the paddles height
	 *
	 * @return height The paddles current height
	 */
	public int getHeight() {
		return height;
	}

	/**
	 * The setter for the paddles height
	 *
	 * @param height The paddles new height
	 */
	public void setHeight(int height) {
		this.height = height;
	}

	/**
	 * The getter for the paddles direction
	 *
	 * @return direction The paddles current direction
	 */
	public int getDirection() {
		return direction;
	}

	/**
	 * The setter for the paddles direction
	 *
	 * @param direction The paddles new direction
	 */
	public void setDirection(int direction) {
		// normalization not needed
		// normalize to valid values
		//if(direction > 0) direction =  1;
		//if(direction < 0) direction = -1;

		this.direction = direction;
	}

	/**
	 * Updates paddles position based on balls position
	 *
	 * @param ball The ball
	 */
	public void updatePosition(Ball ball) {
		// move paddle, if it is the nearest paddle
		if(ball.getPosition().getY() < Constants.SCREEN_HEIGHT/2.0 && getPosition().getY() < Constants.SCREEN_HEIGHT/2.0 ||
		   ball.getPosition().getY() > Constants.SCREEN_HEIGHT/2.0 && getPosition().getY() > Constants.SCREEN_HEIGHT/2.0) {

			// temporary position to modify x value
			Position tmp = getPosition();

			// modify x value; getDirection is normalized to the values {-1, 0, 1}
			// therefore we can just multiply it with DX_MOVEMENT
			tmp.setX(getPosition().getX() + getDirection()*Constants.DX_MOVEMENT);

			// out of border boundaries
			if(tmp.getX() <= 0) tmp.setX(0);
			if(tmp.getX() >= Constants.SCREEN_WIDTH-getWidth()) tmp.setX(Constants.SCREEN_WIDTH-getWidth());

			setPosition(tmp);
		}
	}
}