// set bullet sound

bulletsound = new QMediaPlayer();

bulletsound->setMedia(QUrl("qrc:/sounds/bullet.wav"));

// set graphic

setPixmap(QPixmap(":/images/player.png"));

// move the player left and right

if (event->key() == Qt::Key_Left){

if (pos().x() > 0)

setPos(x()-10,y());

}

else if (event->key() == Qt::Key_Right){

if (pos().x() + 100 < 800)

setPos(x()+10,y());

}

// shoot with the spacebar

else if (event->key() == Qt::Key_Space){

// create a bullet

Bullet * bullet = new Bullet();

bullet->setPos(x()+45,y());

scene()->addItem(bullet);

// play bulletsound

if (bulletsound->state() == QMediaPlayer::PlayingState){

bulletsound->setPosition(0);

}

else if (bulletsound->state() == QMediaPlayer::StoppedState){

bulletsound->play();

}

}

// create an enemy

Enemy * enemy = new Enemy();

scene()->addItem(enemy);