/// <summary>
/// Controls the various scenes for the game, waiting for user input and responding with the correct follow up action
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
KeyboardState ks = Keyboard.GetState();
//the index of which menu item is currently hovered/selected
int selectedIndex = 0;
//check to see if were on menu screen
if (menuScene.Enabled)
{
selectedIndex = menuScene.Menu.SelectedIndex; //sets the selected index
if (selectedIndex == 0 && ks.IsKeyDown(Keys.Enter)) //if Play game is selected, hide the menu and menu music and play action scene with music
{
menuScene.Hide();
MediaPlayer.Stop();
actionScene.ResetGame();
actionScene.Show();
MediaPlayer.Play(actionSong);
MediaPlayer.IsRepeating = true;
MediaPlayer.Volume = 0.1f;
}
else if (selectedIndex == 1 && ks.IsKeyDown(Keys.Enter)) //if Help scene is selected, hide menu and show help scene
{
menuScene.Hide();
helpScene.Show();
}
else if (selectedIndex == 2 && ks.IsKeyDown(Keys.Enter)) //if Credit scene is selected, hide menu and show credit scene
{
menuScene.Hide();
creditScene.Show();
}
else if (selectedIndex == 3 && ks.IsKeyDown(Keys.Enter)) //if Quit is selected, close the application
{
Exit();
}
}
else if (actionScene.Enabled) //check to see if the user is on the action scene
{
if (ks.IsKeyDown(Keys.Escape))
{
MediaPlayer.Stop();
actionScene.Hide();
menuScene.Show();
MediaPlayer.Play(menuSong);
MediaPlayer.IsRepeating = true;
}
}
else if (helpScene.Enabled) //check to see if user is on the help scene
{
if (ks.IsKeyDown(Keys.Escape))
{
helpScene.Hide();
menuScene.Show();
}
}
else if (creditScene.Enabled) //check to see if the user is on the credit scene
{
if (ks.IsKeyDown(Keys.Escape))
{
creditScene.Hide();
menuScene.Show();
}
}
else if (gameOverScene.Enabled) //check to see if the user is on the game over scene
{
if (ks.IsKeyDown(Keys.Escape))
{
gameOverScene.Hide();
menuScene.Show();
MediaPlayer.Play(menuSong);
MediaPlayer.IsRepeating = true;
}
}
base.Update(gameTime);
}