public void PressKey(int keyIndex)
{
if (keyIndex < _operations.Count)
{
Operation operation = _operations[keyIndex];
if (_input.AddChar(operation.ShortCut))
{
return;
}
if (operation.ShortCut == '\b' && _calculationStack.Count > 0)
{
_calculationStack.Pop();
return;
}
if (operation.HasFunction)
{
if (_input.IsActive)
{
_calculationStack.Push(_input.ToDouble());
_input.Clear();
if (operation.Name == "Enter")
{
return;
}
}
operation.Execute(_calculationStack);
}
}
}
public RPNCalculatorEngine()
{
_calculationStack = new Stack <double>();
_input = new InputLine();
_input.Clear();
_operations = new List <Operation>(_baseOperationCount);
_operations.Add(new Operation("Zero", "0", "0", '0'));
_operations.Add(new Operation("One", "1", "1", '1'));
_operations.Add(new Operation("Two", "2", "2", '2'));
_operations.Add(new Operation("Three", "3", "3", '3'));
_operations.Add(new Operation("Four", "4", "4", '4'));
_operations.Add(new Operation("Five", "5", "5", '5'));
_operations.Add(new Operation("Six", "6", "6", '6'));
_operations.Add(new Operation("Seven", "7", "7", '7'));
_operations.Add(new Operation("Eight", "8", "8", '8'));
_operations.Add(new Operation("Nine", "9", "9", '9'));
_operations.Add(new Operation("Decimal", ".", ".", '.'));
_operations.Add(new Operation("Exponent", "Exp", "E", 'E'));
_operations.Add(new Operation("Back", "Bck", "Back", '\b'));
_operations.Add(new UnaryOperation("Enter", "Cpy", "Enter", '\r', Copy));
_operations.Add(new UnaryOperation("Negate", "Neg", "+/-", '_', x => - x));
_operations.Add(new UnaryOperation("Inverse", "Inv", "1/x", '\\', x => 1 / x));
_operations.Add(new ConstantOperation("PI", "PI", "\x03c0", 'p', Math.PI));
_operations.Add(new ConstantOperation("e", "e", "e", 'e', Math.E));
_operations.Add(new BinaryOperation("Add", "Add", "+", '+', (y, x) => x + y));
_operations.Add(new BinaryOperation("Subtract", "Sub", "-", '-', (y, x) => x - y));
_operations.Add(new BinaryOperation("Multiply", "Mul", "x", '*', (y, x) => x * y));
_operations.Add(new BinaryOperation("Divide", "Div", "\xf7", '/', (y, x) => x / y));
_operations.Add(new BinaryOperation("Modulus", "Mod", "mod", '%', (y, x) => x % y));
_operations.Add(new UnaryOperation("Factorial", "Fac", "!", '!', Factorial));
_operations.Add(new UnaryOperation("Cosine", "Cos", "cos", 'c', Math.Cos));
_operations.Add(new UnaryOperation("Sine", "Sin", "sin", 's', Math.Sin));
_operations.Add(new UnaryOperation("Tangent", "Tan", "tan", 't', Math.Tan));
_operations.Add(new UnaryOperation("Square", "x\xb2", "x\xb2", 'S', x => Math.Pow(x, 2)));
_operations.Add(new UnaryOperation("Cube", "x\xb3", "x\xb3", 'C', x => Math.Pow(x, 3)));
_operations.Add(new UnaryOperation("SquareRoot", "RtX", "\x221a", 'R', Math.Sqrt));
}
