private void NewColumn(object sender, NewColumnEventArgs args)
{
ProcessJewel(true);
int prevColumn = args.PrevCellColumn;
bool hadRemoval = false;
if (prevColumn >= 0)
{
// loop over rows to see if squares should be removed:
int numSquareRows = Squares[0].Length;
var squaresToRemove = new List <Square>();
for (int r = 0; r < numSquareRows; r++)
{
for (int c = prevColumn; c >= 0; c--)
{
var s = FindSquare(c, r);
if (s?.CanRemove(args.PrevCellColumn, args.CellColumn) == Square.ChainStates.Removeable)
{
squaresToRemove.Add(s);
}
}
}
// execute removal after collecting all squares:
hadRemoval = hadRemoval || squaresToRemove.Count > 0;
foreach (var s in squaresToRemove)
{
s.Remove();
}
// see if we've reached a column that doesn't have any jeweled cells:
if (InProcessOfRemovingJewelCells)
{
// check if we just wrapped our playfield:
int currColumn = Timeline.Column;
bool checkWrapped = Timeline.Wrapped(args.PrevCellColumn) &&
GetCellColumn(NumCellColumns - 1).Any(c => c.RemoveState == Cell.RemoveStates.JewelRemoving);
bool checkNoJewelCellsInColumn = Cells[currColumn].All(c => c.RemoveState != Cell.RemoveStates.JewelRemoving &&
c.RemoveState != Cell.RemoveStates.JewelWillBeRemoved);
if (checkNoJewelCellsInColumn || checkWrapped)
{
for (int c = 0; c <= args.PrevCellColumn; c++)
{
for (int r = 0; r < Cells[currColumn].Length; r++)
{
var cell = Cells[c][r];
if (cell.RemoveState == Cell.RemoveStates.JewelRemoving)
{
cell.Reset();
hadRemoval = true;
}
}
}
InProcessOfRemovingJewelCells = false;
}
}
}
for (int c = args.CellColumn; c <= args.CellColumn; c++)
{
for (int r = NumCellRows - 1; r >= 0; r--)
{
var cell = Cells[c][r];
// advance cell states:
if (cell.RemoveState == Cell.RemoveStates.WillBeRemoved)
{
cell.RemoveState = Cell.RemoveStates.Removing;
}
}
}
if (!hadRemoval)
{
return;
}
bool emptyField = true;
bool hasOneColor = true;
Cell.States?oneColor = null;
// fall cells based on removed squares:
for (int c = 0; c < NumCellColumns; c++)
{
// collect move counts based on empty cells:
var moveCounts = new int[NumCellRows];
int currMoveCount = 0;
for (int r = NumCellRows - 1; r >= 0; r--)
{
var cell = Cells[c][r];
if (cell.IsImmovable)
{
currMoveCount = 0;
}
moveCounts[r] = cell.IsOccupied ? currMoveCount : 0;
currMoveCount += cell.IsOccupied ? 0 : 1;
if (cell.IsOccupied)
{
emptyField = false;
}
// check to see if we have only one color:
if (oneColor == null)
{
oneColor = cell.Color;
}
else if ((cell.IsWhite || cell.IsBlack) &&
!cell.IsSameColor((Cell.States)oneColor))
{
hasOneColor = false;
}
}
// transfer cells:
for (int i = NumCellRows - 1; i >= 0; i--)
{
if (moveCounts[i] > 0)
{
Cells[c][i].TransferTo(Cells[c][i + moveCounts[i]]);
}
}
}
// add status:
if (emptyField)
{
Stats.AddEmptyColorBonus();
}
else if (hasOneColor)
{
Stats.AddSingleColorBonus();
}
}
/// <summary>
/// Constructor for Playfield.
/// Column 0 is the top of the playfield.
/// Row 0 is the left of the playfield.
/// </summary>
/// <param name="numColumns">The number of cell columns.</param>
/// <param name="numRows">The number of cell rows.</param>
public Playfield(int numColumns, int numRows)
{
JeweledCells = new List <Cell>();
// score:
Stats = new Stats();
const int min = 2;
if (numColumns < 0 || numColumns < min || numRows < 0 || numRows < min)
{
throw new ArgumentOutOfRangeException("Columns and rows (" + numColumns + "x" + numRows + ") must be greater than " + min);
}
Cells = new Cell[numColumns][];
for (int x = 0; x < NumCellColumns; x++)
{
Cells[x] = new Cell[numRows];
for (int y = 0; y < NumCellRows; y++)
{
Cells[x][y] = new Cell(x, y);
}
}
Squares = new Square[numColumns - 1][];
for (int x = 0; x < NumSquareColumns; x++)
{
Squares[x] = new Square[numRows - 1];
for (int y = 0; y < NumSquareRows; y++)
{
var s = new Square(x, y, this);
s.SquareCompleted += (sender, args) => Stats.AddCompletedSquare();
Squares[x][y] = s;
for (int cellX = 0; cellX < Square.NumCellsPerAxis; cellX++)
{
for (int cellY = 0; cellY < Square.NumCellsPerAxis; cellY++)
{
var cell = Cells[x + cellX][y + cellY];
int x1 = x;
int y1 = y;
cell.StateChanged += (sender, args) =>
{
Squares[x1][y1].CellStateChanged(sender, args);
if (cell.IsJeweled)
{
JeweledCells.Add(cell);
}
else
{
JeweledCells.Remove(cell);
}
};
}
}
}
}
// timeline:
Timeline = new Timeline(numColumns);
Timeline.NewColumn += NewColumn;
Timeline.WrapColumn += (sender, args) => Stats.IncrementFrame();
}