public override void TryToMovePuzzlePiece(PuzzlePiece piece, int newXIndex, int newYIndex, Point?p)
{
int oldX = piece.XIndex;
int oldY = piece.YIndex;
RemovePuzzlePieceFromLevelMatrix(piece);
piece.XIndex = newXIndex;
piece.YIndex = newYIndex;
PuzzlePiece overlapedPiece;
if (IsPieceInsideOfGrid(piece))
{
if (!IsPieceOverlapingWithOthers(piece, out overlapedPiece))
{
piece.IsAdded = true;
piece.X = (piece.XIndex + gridWidth) * CellSize;
piece.Y = (piece.YIndex + gridHeight) * CellSize;
AddPuzzlePieceTolLevelMatrix(piece);
IsLevelSolved();
return;
}
}
else if (IsPieceOutsideOfGrid(piece))
{
if (IsPieceInsideOfLevel(piece))
{
if (!IsPieceOverlapingWithOthers(piece, out overlapedPiece))
{
piece.IsAdded = false;
piece.X = (piece.XIndex + gridWidth) * CellSize;
piece.Y = (piece.YIndex + gridHeight) * CellSize;
AddPuzzlePieceTolLevelMatrix(piece);
return;
}
else
{
//element is trying to be placed over another outside of grid
if (GetNumberOfOverlapingPieces(piece) <= 1 &&
piece.GetType() != typeof(CombinedPuzzlePiece) &&
overlapedPiece.GetType() != typeof(CombinedPuzzlePiece))
{
//create combined piece
CombinedPuzzlePiece newPuzzlePiece = CreateUnionPuzzlePiece(piece, overlapedPiece);
//remove dragged piece
RemovePuzzlePieceFromLevelMatrix(piece);
drawings.Remove(piece);
puzzlePieces.Remove(piece);
//remove overlaped piece
RemovePuzzlePieceFromLevelMatrix(overlapedPiece);
drawings.Remove(overlapedPiece);
puzzlePieces.Remove(overlapedPiece);
//add combined puzzle piece to level
newPuzzlePiece.PaintShape(this);
drawings.Add(newPuzzlePiece);
puzzlePieces.Add(newPuzzlePiece);
AddPuzzlePieceTolLevelMatrix(newPuzzlePiece);
newPuzzlePiece.isInitialised = true;
return;
}
}
}
}
piece.XIndex = oldX;
piece.YIndex = oldY;
AddPuzzlePieceTolLevelMatrix(piece);
}