//Called by gridSquare whenever a number is changed
public static void NumberChanged(GridSquare gs)
{
int index = all_squares_.IndexOf(gs);
switch (PlayerPrefs.GetInt(pref_keys.error_highlighting_int.ToString()))
{
default:
case 0:
//No error highlighting
break;
case 1:
if (gs.Number_ == 0)
{
gs.SetErrorColor(false);
}
//Highlight obvious logical errors
//Data on the current GridSquare, to find the current row, column and square
int row = index / length;
int col = index % length;
int squarestack = (index / root) % root;
int squareband = index / (length * root);
//Values needed in the for loop
List <GridSquare> same_row_ = new List <GridSquare>();
List <GridSquare> same_col_ = new List <GridSquare>();
List <GridSquare> same_square_ = new List <GridSquare>();
List <GridSquare> error_squares_ = new List <GridSquare>();
//HashSets to check for duplicates in the loop
var row_keys = new HashSet <int>();
var col_keys = new HashSet <int>();
var square_keys = new HashSet <int>();
for (int i = 0; i < length; i++)
{
////Current squares
GridSquare row_square = all_squares_[i + row * length];
GridSquare col_square = all_squares_[i * length + col];
GridSquare square_square = all_squares_[(squarestack * root + squareband * root * length) + (i % root) + (length * (i / root))];
same_row_.Add(row_square);
same_col_.Add(col_square);
same_square_.Add(square_square);
//Checking for duplicates in row, column and square
//Row check
if (!row_keys.Add(row_square.Number_))
{
if (row_square.Number_ > 0)
{
foreach (GridSquare gridSquare in same_row_.Where(x => x.Number_ == row_square.Number_))
{
if (!error_squares_.Contains(gridSquare))
{
error_squares_.Add(gridSquare);
}
}
}
}
//Column check
if (!col_keys.Add(col_square.Number_))
{
if (col_square.Number_ > 0)
{
foreach (GridSquare gridSquare in same_col_.Where(x => x.Number_ == col_square.Number_))
{
if (!error_squares_.Contains(gridSquare))
{
error_squares_.Add(gridSquare);
}
}
}
}
//Square Check
if (!square_keys.Add(square_square.Number_))
{
if (square_square.Number_ > 0)
{
foreach (GridSquare gridSquare in same_square_.Where(x => x.Number_ == square_square.Number_))
{
if (!error_squares_.Contains(gridSquare))
{
error_squares_.Add(gridSquare);
}
}
}
}
}
//Error highlighting
if (error_squares_.Count > 0)
{
foreach (GridSquare gridSquare in error_squares_)
{
if (!all_errors_.Contains(gridSquare))
{
all_errors_.Add(gridSquare);
}
gridSquare.SetErrorColor(true);
}
}
else
{
foreach (GridSquare gridSquare in all_errors_)
{
gridSquare.SetErrorColor(false);
}
all_errors_.Clear();
}
break;
case 2:
//Highlight ALL error (will need solved sudoku for this)
break;
}
}
