Listener.java

import java.awt.event.*;

public class Listener implements KeyListener {
    int gameState;
    TetrisFrame s;

    public Listener(int gameState, TetrisFrame TetFrame) {
        this.gameState = gameState;
        s = TetFrame;
    }

    public void keyPressed(KeyEvent e) {
        // 80 = P, 38 = up, 37 = left, 39 = right, 32 = down

        // Pause/resume game
        if (e.getKeyCode() == 80) {
            s.pause();
            return;
        }

        // If game is not in "running" mode (ex. paused, game over), then return before anything can be touched
        if (this.gameState != 1) {
            return;
        }

        // move: 4 = rotate, 2 = drop, 0 = left, 1 = right, 3 = hard drop
        if (e.getKeyCode() == 38) {
            s.move(4);
        } else if (e.getKeyCode() == 40) {
            s.move(2);
        } else if (e.getKeyCode() == 37) {
            s.move(0);
        } else if (e.getKeyCode() == 39) {
            s.move(1);
        } else if (e.getKeyCode() == 32) {
            s.move(3);
        }/* DEBUG */ else if (e.getKeyCode() == 78) {
            s.newPiece();
        } else if (e.getKeyCode() == 71) {
            s.newGame();
        } /* DEBUG */

        // After everythings been done, update the graphics
        s.updateGraphics();
    }

    /* NOT USED */
    public void keyReleased(KeyEvent e) {
    }

    public void keyTyped(KeyEvent e) {
    }
    /* NOT USED */
}