/// <summary>
/// Add new calculator`s result
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public ICalculatorModel AddCalculation(ICalculatorModel model)
{
_context.Calculations.Add((Calculations)model);
_context.SaveChanges();
return(model);
}
public StartCalculatorSteps(
INavigator navigator,
ICalculatorModel calculator)
{
this.navigator = navigator;
this.calculator = calculator;
}
public ICalculatorModel AddCalculation(ICalculatorModel model)
{
if (model.Expression.Equals(string.Empty))
{
return(null);
}
return(model);
}
public CalcViewModel()
{
_model = new CalculatorModel();
this.AddSymbolCommand = new Command<string>(symbol =>
{
//for first button press
if (string.IsNullOrEmpty(displayString))
{
if (char.IsDigit(symbol[0]))
{
DisplayString += symbol;
return;
}
else
return;
}
//constraint for input only two numbers and action symbol
if (!char.IsDigit(symbol[0]) && symbol != "." && CommandIsFull(displayString))
return;
char lastSymbol = GetLastSymbol(displayString);
//check point enter
if (symbol == "." && !CanAddPoint(displayString, lastSymbol))
return;
//check re-enter mathoperator
else if (!Char.IsDigit(symbol[0]) && !CanAddMath(displayString, lastSymbol))
{
DisplayString = ReplaceLastSymbol(displayString, symbol);
return;
}
DisplayString += symbol;
});
this.RemoveLastSymbolCommand = new Command(obj =>
{
if (!string.IsNullOrEmpty(displayString))
this.DisplayString = displayString.Substring(0, displayString.Length - 1);
});
this.ClearAllCommand = new Command(obj => { this.DisplayString = string.Empty; });
this.CalculateCommand = new Command(obj =>
{
var result = _model.Calculate(displayString);
if (result != null)
DisplayString = result.ToString();
});
}
/// <summary>
/// Create a new calculator controller
/// </summary>
/// <param name="model">The model to use with the controller</param>
/// <param name="view">The view to use with the controller</param>
public CalculatorController(ICalculatorModel model, ICalculatorView view)
{
Model = model;
View = view;
//listen View key pressed
View.OnKeyPressed += HandleKeyPressed;
//listen Model operands & operation
Model.OnOperandChanged += HandleOperandChanged;
Model.OnOperationChanged += HandleOperationChanged;
Model.OnResultComputed += HandleResultComputed;
Model.OnCleared += HandleModelCleared;
//Clear model at beginning
Model.Clear();
}
public CalculatorViewModel(ICalculatorModel calculatorModel)
{
_calculatorModel = calculatorModel;
}
protected override void Context()
{
_calculatorModel = new CalculatorModel();
}
public CalculatorViewModel(ICalculatorModel calculatorModel)
{
_calculatorModel = calculatorModel;
_display = "0";
}
public CalculatorViewModel()
{
this._calculatorModel = new CalculatorModel();
_display = "0";
}
protected override void Because()
{
_calculatorModel = ObjectFactory.GetInstance<ICalculatorModel>();
_viewModel = new CalculatorViewModel(_calculatorModel);
base.Because();
}
