import greenfoot.*;  // (World, Actor, GreenfootImage, and Greenfoot)

/**
 * A piano that can be played with the computer keyboard.
 * 
 * @author: M. Kolling
 * @version: 0.1
 */
public class Piano extends World
{
    /**
     * Make the piano.
     */
    private String[] whitekeys = 
        {"q", "w", "e", "r", "t", "y", "u", "i", "o", "p", "[", "]"};
    private String[] whiteNotes = 
        {"2c", "2d", "2e", "2f", "2g", "2a", "2b", "3c", "3d", "3e", "3f", "3g"};
    
    public Piano() 
    {
        super(800, 340, 1);
        makekeys();
    }

    /**
     * This puts all of the keys where they should go.
     */
    public void makekeys()
    {
        int i = 0;
        while (i < 12)
        {
            Key whiteKeys = new Key(whiteKeys[i], whiteNotes[i] + ".wav");
            int keyWidth = myKey.getImage().getWidth();
            int keyHeight = myKey.getImage().getHeight();
            int worldWidth = getWidth();
            addObject(myKey, i*keyWidth + (((worldWidth - (keyWidth * 12))/2) + (keyWidth / 2)), keyHeight / 2);
            i = i + 1;
        }    
    }
}