/// <summary>
/// Create the Dlx grid:
/// Create the column headers for the grid and chains them
/// together with the linked list.
/// </summary>
private void CreateDlxGrid()
{
// reset
_columnHeaders.Clear();
_solutionNodes.Clear();
SolutionList.Clear();
var primaryColCount = _puzzleSize.ToInt32() * _puzzleSize.ToInt32() * 4;
// build DLX network
_columnHeaders[0] = new DlxHeader(0);
for (var column = 1; column <= primaryColCount; column++)
{
_columnHeaders[column] = new DlxHeader(column)
{
Right = null,
Left = _columnHeaders[column - 1]
};
// Connect the current column to the previous column.
_columnHeaders[column - 1].Right = _columnHeaders[column];
}
// Connect last primary column to the root node.
_columnHeaders[primaryColCount].Right = _columnHeaders[0];
_columnHeaders[0].Left = _columnHeaders[primaryColCount];
}
public void Stop()
{
RepositoryList.Clear();
SolutionList.Clear();
ProjectList.Clear();
}