import greenfoot.*;  // (World, Actor, [code]import greenfoot.*;  // (World, Actor, GreenfootImage, and Greenfoot)
import java.awt.*;
import java.lang.*;
/**
 * A piano that can be played with the computer keyboard.
 * 
 * @author: M. Kolling
 * @version: 0.4
 */
public class Piano extends World
{
    private String[] whiteKeys =
        {"z", "x", "c", "v", "b", "n", "m", "s", "d", "f", "g", "h", "j", "k"};
    private String[] whiteNotes =
        {"2a", "2b", "3c", "3d", "3e", "3f", "3g", "3a", "3b", "4c", "4d", "4e", "4f", "4g" };
    private String[] blackKeys =
        { "`", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "=" };
    private String[] blackNotes =
        { "2a#", "", "3c#", "3d#", "", "3f#", "3g#", "3a#", "", "4c#", "4d#", "", "4f#"};
    /**
     * Make the piano. This means mostly, apart from defining the size,
     * making the keys and placing them into the world.
     */
    public Piano() 
    {
        super(927, 340, 1);
        makeKeys();
    }
    
    /**
     * Create the piano keys and place them in the world.
     */
    private void makeKeys() 
    {
        for(int i = 0; i < whiteKeys.length; i++) 
        {
            Key key = new Key(whiteKeys[i], whiteNotes[i] + ".wav");
            addObject(key, 54 + (i*63), 140);
            //showText(whiteKeys[i],54 + (i*63), 250);
        }
        for(int i = 0; i < whiteKeys.length-1; i++) 
        {
            if(blackKeys[i] == "1" || blackKeys[i]== "4" || blackKeys[i] =="8" || blackKeys[i] =="-")
            {
                i++;
            }
            blackKey key = new blackKey(blackKeys[i], blackNotes[i] + ".wav");
            addObject(key, 85 + (i*63), 86);
            showText(blackKeys[i], 85 + (i*63), 140);
        }
    }
}