bool OperateOn(int col, int row, SudokuModel model)
{
if (!model.IsSolved(col, row)) {
// obviously can't eliminate anything in a solved cell.
// try each int i that is a possibility for the cell, and see if an error results
foreach (var i in model.GetPossibilitySetCell(col, row).HighBitPositions()) {
var clone = new SudokuModel(model);
clone.SetValue(col, row, i);
_elimStrategy.Run(clone);
if (clone.IsConsistent()) {
continue;
}
// If so, we can eliminate that from the original model.
model.Eliminate(col, row, i);
return true;
// return immediately after eliminating something, since
// this is a slow algorithm, and we want our faster
// algorithms to see if they make some more eliminations first.
}
}
return false;
}
void OpenFile(string name)
{
_name = name;
// Open and read the file
try {
TextReader reader = new FileInfo(name).OpenText();
var text = reader.ReadToEnd();
reader.Dispose();
var lines = text.Split(new[] {"\r\n"}, StringSplitOptions.RemoveEmptyEntries);
// Create a new model and solver, and add event listeners
if (_model != null) {
_model.ModelChanged -= HandleModelModelChanged;
_solver.ScanFinished -= HandleSolverScanFinished;
_solver.Finished -= HandleSolverFinished;
}
_model = new SudokuModel(lines.Length);
_solver = new Solver(_model);
_model.ModelChanged += HandleModelModelChanged;
_solver.ScanFinished += HandleSolverScanFinished;
_solver.Finished += HandleSolverFinished;
// Update the screen
_grid.Model = _model;
_txtProgress.Clear();
// Load data into the model
for (var row = 0; row < lines.Length; ++row) {
var cells = lines[row].Split(',');
for (var col = 0; col < lines.Length; ++col) {
if (!string.IsNullOrEmpty(cells[col])) {
_model.SetValue(col, row, cells[col][0] - 'A');
}
}
}
} catch (FileNotFoundException) {}
}