public void OnClearEntry()
{
displayInvalid = true;
decimalAdded = false;
negative = NegState.Pos;
blockZero = ZeroState.None;
}
private void OnOverwrite()
{
if (blockZero == ZeroState.Adding)
{
blockZero = ZeroState.BlockZero;
}
else if (negative == NegState.Negating)
{
blockZero = ZeroState.None;
}
if (negative == NegState.Negating || negative == NegState.Clearing)
{
displayInvalid = true;
negative = NegState.Neg;
}
else
{
displayInvalid = false;
negative = NegState.Pos;
}
if (state != State.NextOp && state != State.FirstOp)
{
CurrentOperation = Operation.Add;
state = State.Import;
}
else
{
state = State.Editing;
}
decimalAdded = false;
}
public void OnClear()
{
state = State.Reset;
decimalAdded = false;
displayInvalid = false;
negative = NegState.Pos;
blockZero = ZeroState.None;
}
public void OnOperation()
{
if (state == State.NoChain)
{
state = State.NextOp;
}
isEvaluate = false;
blockZero = ZeroState.None;
}
public void OnEvaluate()
{
if (state == State.NextOp || state == State.FirstOp)
{
state = State.NoChain;
}
isEvaluate = true;
blockZero = ZeroState.None;
}
public void OnNumber(int number)
{
displayInvalid = false;
if (number == 0)
{
if (blockZero == ZeroState.None)
{
blockZero = ZeroState.Adding;
}
else if (blockZero == ZeroState.BlockZero)
{
blockZero = ZeroState.Blocking;
}
}
else if (blockZero == ZeroState.BlockZero)
{
blockZero = ZeroState.Replacing;
}
else
{
blockZero = ZeroState.AcceptAll;
}
}
public void OnDecimalPost()
{
decimalAdded = true;
displayInvalid = false;
blockZero = ZeroState.AcceptAll;
}
