/// <summary>
/// Method <c>GameTimer_Tick()</c>
/// Represents the that should happen every timer tick.
/// Ex: the _shape should move down if it can, if not a new shape
/// is generated at the top.
/// Checks for game over condition and calls the method that clears full
/// rows.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void GameTimer_Tick(object sender, EventArgs e)
{
_shape.MoveDown();
if (!_shape.ValidMoveDown() && !_gameOver)
{
_shape.MarkPosition();
_shape = _nextShape;
_shape.CenterShape();
NextBlock.Clear();
_nextShape = _shapeFactory.BuildRandomShape();
NextBlock.AddRange(_nextShape.ShapeBlocks);
Blocks.AddRange(_shape.ShapeBlocks);
if (GameOverCondition())
{
_gameOver = true;
_timer.Stop();
GameOver gameOverWindow = new GameOver();
gameOverWindow.ShowDialog();
}
CheckForPoints();
}
}
/// <summary>
/// Constructor <c> Tetris</c> instantiates tetris with all the default conditions
/// </summary>
public Tetris()
{
_shapeFactory = new ShapeFactory(GameBoard.Grid);
Blocks = new ObservableCollection <BlockModel>();
NextBlock = new ObservableCollection <BlockModel>();
HeldBlock = new ObservableCollection <BlockModel>();
_timer = new DispatcherTimer();
_timer.Interval = new TimeSpan(0, 0, 0, 0, _timeInterval);
_timer.Tick += GameTimer_Tick;
_shape = _shapeFactory.BuildRandomShape();
_shape.CenterShape();
_nextShape = _shapeFactory.BuildRandomShape();
NextBlock.AddRange(_nextShape.ShapeBlocks);
Blocks.AddRange(_shape.ShapeBlocks);
Score = 0;
Level = 1;
_timer.Start();
}
/// <summary>
/// Method <c>HoldBlock()</c>
/// sets the heldBlock to the current block, and then sets the current block to
/// the next block.
/// </summary>
public void HoldBlock()
{
if (HeldBlock.Count == 0)
{
_heldShape = _shapeFactory.BuildShape(_shape);
for (int i = 0; i < 4; i++)
{
Blocks.Remove(x => x.GridX == _shape.ShapeBlocks[i].GridX &&
x.GridY == _shape.ShapeBlocks[i].GridY);
}
_shape = _nextShape;
_shape.CenterShape();
Blocks.AddRange(_shape.ShapeBlocks);
_nextShape = _shapeFactory.BuildRandomShape();
NextBlock.Clear();
NextBlock.AddRange(_nextShape.ShapeBlocks);
HeldBlock.AddRange(_heldShape.ShapeBlocks);
}
else
{
HeldBlock.Clear();
var tempShape = _heldShape;
_heldShape = _shapeFactory.BuildShape(_shape);
for (int i = 0; i < 4; i++)
{
Blocks.Remove(x => x.GridX == _shape.ShapeBlocks[i].GridX &&
x.GridY == _shape.ShapeBlocks[i].GridY);
}
_shape = tempShape;
_shape.CenterShape();
Blocks.AddRange(_shape.ShapeBlocks);
HeldBlock.AddRange(_heldShape.ShapeBlocks);
}
}