/// <summary>
/// Initializes the game plane wars.
/// </summary>
public MainWindow()
{
// Create a connection object for database connection.
conn = new MySqlConnection(Settings.ConnectionString);
// Initialize the MySql command object.
cmd = new MySqlCommand();
cmd.Connection = conn;
/* Load sounds. */
musicPlayerShoot = new MediaPlayer();
musicPlayerShoot.Open(new Uri("Sounds/bullet.wav", UriKind.Relative));
musicPlayerGetBomb = new MediaPlayer();
musicPlayerGetBomb.Open(new Uri("Sounds/get_bomb.wav", UriKind.Relative));
musicPlayerGetBullet = new MediaPlayer();
musicPlayerGetBullet.Open(new Uri("Sounds/get_bullet.wav", UriKind.Relative));
musicSmallEnemyDestroy = new MediaPlayer();
musicSmallEnemyDestroy.Open(new Uri("Sounds/enemy1_down.wav", UriKind.Relative));
musicMiddleEnemyDestroy = new MediaPlayer();
musicMiddleEnemyDestroy.Open(new Uri("Sounds/enemy2_down.wav", UriKind.Relative));
musicLargeEnemyDestroy = new MediaPlayer();
musicLargeEnemyDestroy.Open(new Uri("Sounds/enemy3_down.wav", UriKind.Relative));
musicPlayerUseBomb = new MediaPlayer();
musicPlayerUseBomb.Open(new Uri("Sounds/use_bomb.wav", UriKind.Relative));
musicPlayerClicked = new MediaPlayer();
musicPlayerClicked.Open(new Uri("Sounds/button.wav", UriKind.Relative));
musicBGM = new MediaPlayer();
musicBGM.Open(new Uri("Sounds/game_music.mp3", UriKind.Relative));
// Initialize timer.
timer = new Timer(15);
timer.Elapsed += ElapsedHandler;
// Initialize linked lists.
enemies = new LinkedList <Enemy>();
bullets = new LinkedList <Bullet>();
bulletsToRemove = new LinkedList <Bullet>();
enemiesToRemove = new LinkedList <Enemy>();
enemiesToDestroy = new LinkedList <Enemy>();
// Initialize random number generator.
random = new Random();
// This game is running.
running = false;
// No supply now.
supply = null;
// The space key is not being pressed now.
spaceKeyPressed = false;
// Player score is 0 now.
score = 0;
// Current difficult level is 0.
level = 0;
// Double-bullet count starts from 0.
bullet2Count = 0;
// Initialize components in the window.
InitializeComponent();
}