public void Add(SudokuSolveStep step)
{
lock (stepsLock)
{
this.steps.Add(step);
}
}
public SudokuNewStepEventArgs(SudokuSolveStep step)
{
if (step == null)
{
throw new ArgumentNullException("step");
}
this.step = step;
}
private bool TryGetCurrentStep(out SudokuSolveStep currentStep)
{
currentStep = null;
var steps = this.steps;
if (steps.Count == 0)
{
return(false); //no step
}
var currentStepIndex = this.currentStepIndex;
if (currentStepIndex < 0 || currentStepIndex >= steps.Count)
{
return(false);
}
currentStep = steps[currentStepIndex];
return(true);
}