//gets: index of current piece location and final location. does: moes piece to said location.
//Will not accept occupied spot - removePiece must be used beforhand in order to simulate eating
public void MovePiece(int firstXIndex, int firstYIndex, int secondXIndex, int secondYIndex)
{
if (!ChessUtilities.isIndexInBounds(firstXIndex, firstYIndex, secondXIndex, secondYIndex))
{
throw new ArgumentOutOfRangeException();
}
PictureBox pieceAtLocation;
Point locationNow = ConvertIndicesToLocation(firstXIndex, firstYIndex);
Point finalLocation = ConvertIndicesToLocation(secondXIndex, secondYIndex);
PieceUIMap.TryGetValue(locationNow, out pieceAtLocation);
if (pieceAtLocation == null)
{
throw new PieceDoesntExistAtThatLocationException();
}
if (PieceUIMap.ContainsKey(finalLocation))
{
throw new PieceAlreadyAtLocationConflictException();
}
pieceAtLocation.Visible = false;
//physically animate piece to new location
pieceAtLocation.Location = finalLocation;
//remove old location pair from UIMap
PieceUIMap.Remove(locationNow);
//add new location pair to UIMap
PieceUIMap[finalLocation] = pieceAtLocation;
pieceAtLocation.Visible = true;
resetCurrentPieceClicked();
}