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);
}
}
}