/// <summary>
/// Updates the loading screen.
/// </summary>
public override void Update(GameTime gameTime, bool otherScreenHasFocus,
bool coveredByOtherScreen)
{
base.Update(gameTime, otherScreenHasFocus, coveredByOtherScreen);
// If all the previous screens have finished transitioning
// off, it is time to actually perform the load.
if (otherScreensAreGone)
{
TankWars.RemoveScreen(this);
foreach (GameScreen screen in screensToLoad)
{
if (screen != null)
{
TankWars.AddScreen(screen);
}
}
// Once the load has finished, we use ResetElapsedTime to tell
// the game timing mechanism that we have just finished a very
// long frame, and that it should not try to catch up.
TankWars.ResetElapsedTime();
}
}
void QuitGameMenuEntrySelected(object sender, EventArgs e)
{
const string message = "Are you sure you want to quit current game?";
MessageBoxScreen confirmQuitMessageBox = new MessageBoxScreen(message);
confirmQuitMessageBox.Accepted += ConfirmQuitMessageBoxAccepted;
TankWars.AddScreen(confirmQuitMessageBox);
}
protected override void OnCancel()
{
const string message = "Are you sure you want to exit Tank Wars?";
MessageBoxScreen confirmExitMessageBox = new MessageBoxScreen(message);
confirmExitMessageBox.Accepted += ConfirmExitMessageBoxAccepted;
TankWars.AddScreen(confirmExitMessageBox);
}
// Xử lý trường hợp người chơi nhấn Esc
public override void HandleInput(InputState input)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
if (!Player.IsDead)
{
Player.HandleInput(input);
Cursor.HandleInput(input);
}
if (input.IsPauseGame)
{
Content.Audio.BackgroundBattlefieldLoop.Pause();
TankWars.AddScreen(new PauseMenuScreen());
}
}
/// <summary>
/// Allows the game component to update itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
public override void Update
(GameTime gameTime, bool otherScreenHasFocus, bool coveredByOtherScreen)
{
base.Update(gameTime, otherScreenHasFocus, false);
// Gradually fade in or out depending on whether we are covered by the pause screen.
if (coveredByOtherScreen)
{
pauseAlpha = Math.Min(pauseAlpha + 1f / 32, 1);
}
else
{
pauseAlpha = Math.Max(pauseAlpha - 1f / 32, 0);
}
if (IsActive)
{
Content.Audio.BackgroundBattlefieldLoop.Play();
Camera.Update(gameTime);
Cursor.Update(gameTime);
Minimap.Update(gameTime);
// Update Sprite người chơi và các thao tác điều khiển
if (!Player.IsDead)
{
Player.Update(gameTime);
Direction.Update(gameTime);
}
// Update các viên đạn đã đc bắn ra
for (CurrentListItem = 0; CurrentListItem < AmmunitionList.Count; CurrentListItem++)
{
Ammunition ammunition = AmmunitionList[CurrentListItem];
ammunition.Update(gameTime);
}
// Update các vụ nổ
for (CurrentListItem = 0; CurrentListItem < EffectList.Count; CurrentListItem++)
{
Sprite effect = EffectList[CurrentListItem];
effect.Update(gameTime);
}
// Update Enemy
RandomMovableEnemy();
for (CurrentListItem = 0; CurrentListItem < EnemyList.Count; CurrentListItem++)
{
Tank enemy = EnemyList[CurrentListItem];
enemy.Update(gameTime);
}
foreach (PowerIcon power in PowerIconList)
{
power.Update(gameTime);
}
if (Player.IsDead)
{
MissionEndDelay += gameTime.ElapsedGameTime;
if (MissionEndDelay >= TimeSpan.FromSeconds(2))
{
Content.Audio.MissionFailed.Play();
Content.Audio.BackgroundBattlefieldLoop.Pause();
TankWars.AddScreen(new MissionFailedMenuScreen());
}
}
if (IsMissionAccomplished)
{
MissionEndDelay += gameTime.ElapsedGameTime;
if (MissionEndDelay >= TimeSpan.FromSeconds(2))
{
Content.Audio.MissionAccomplished.Play();
Content.Audio.BackgroundBattlefieldLoop.Pause();
if (IsCampaignAccomplished)
{
TankWars.AddScreen(new CampaignAccomplishedMenuScreen());
}
else
{
TankWars.AddScreen(new MissionAccomplishedMenuScreen());
}
}
}
}
}
void AboutMenuEntrySelected(object sender, EventArgs e)
{
TankWars.AddScreen(new AboutMenuScreen());
}
void OptionsMenuEntrySelected(object sender, EventArgs e)
{
TankWars.AddScreen(new OptionsMenuScreen());
}
void SinglePlayerMenuEntrySelected(object sender, EventArgs e)
{
TankWars.AddScreen(new SinglePlayerMenuScreen());
}
