private int?MoveDown(int currentNo, List <int> sequence)
{
int?nextNo = currentNo;
do
{
nextNo = Keypad.DownOf(nextNo.Value);
if (nextNo.HasValue && !sequence.Contains(nextNo.Value))
{
break;
}
}while (nextNo.HasValue);
return(nextNo);
}
private int?MoveLeftDown(int currentNo, List <int> sequence)
{
int?nextNo = Keypad.LeftOf(currentNo);
if (nextNo.HasValue)
{
nextNo = Keypad.DownOf(nextNo.Value);
if (nextNo.HasValue && sequence.Contains(nextNo.Value))
{
nextNo = null;
}
}
return(nextNo);
}
private int?MoveDownRight(int currentNo, List <int> sequence)
{
int?nextNo = Keypad.DownOf(currentNo);
if (nextNo.HasValue)
{
nextNo = Keypad.DownOf(nextNo.Value);
if (nextNo.HasValue)
{
nextNo = Keypad.RightOf(nextNo.Value);
if (nextNo.HasValue && !sequence.Contains(nextNo.Value))
{
return(nextNo);
}
}
}
return(null);
}