package class2_1_DuckFactories_v6.swimBehaviors;

import class2_1_DuckFactories_v6.Duck;
import class2_1_DuckFactories_v6.DuckPond;
import class2_1_DuckFactories_v6.swimBehaviors.SwimBehavior;

import java.awt.*;

public class HorizontalSwimming implements SwimBehavior {
    private Duck parent;
    private Point currentPos = new Point(); // the duck's current position
    private Point increment = new Point(); // the duck's incremental movement

    public HorizontalSwimming(Duck duck) {
        parent = duck;
    }

    /**
     * Horizontal swimming
     */
    @Override
    public void swim() {
        if( (currentPos.x > (DuckPond.PONDSIZE-parent.image.getWidth(null))) // leaving the window's right edge
                || (currentPos.x < 0) ) { // ...or left edge
            increment.x = -increment.x; // reverse direction
        }

        currentPos.x += increment.x; // increment the position of the duck
        parent.setLocation(currentPos); // ...and update its location in the container
    }
}