public BondCalculatorViewModel()
{
//create model object
calculatorModel = new BondCalculatorModel();
//create calculation engine object using Unity container
//we can register other types for this interface in unity and use here e.g. FincadCalculationEngine, BrentEngine
calculationEngine = UnityFactory.Resolve<IBondCalculationEngine>("Default");
//register event from model, will be raised when error state of model properties will change
//will be used to enable/disable calculator button/radio button
calculatorModel.NotifyVM = () => { NotifyPropertyChanged("ReadyForCalculation"); };
//command that binds to Calculate button.
CalculateCommand = new DelegateCommand(param => PriceBond(), (param) => ((ReadyForCalculation) && (!calculationRunning)));
//capture action when user wants to switch from ComputeYield to ComputePV and vice-versa
YieldToggleCommand = new DelegateCommand(param => {
yieldGiven = (bool)param;
StatusText = "";
if (yieldGiven)
{
calculatorModel.Yield = 0.0m;
calculatorModel.PresentValue = 0.0m;
}
}, (param) => true);
PVToggleCommand = new DelegateCommand(param => {
yieldGiven = !(bool)param;
StatusText = "";
if (!yieldGiven)
{
calculatorModel.PresentValue = 0.0m;
calculatorModel.Yield = 0.0m;
}
}, (param) => true);
}
public void Init()
{
target = UnityFactory.Resolve<IBondCalculationEngine>("Default");
yieldPrecision = BondCalculator.Common.AppConfig.Instance.YieldPrecision;
presentValuePrecision = BondCalculator.Common.AppConfig.Instance.PresentValuePrecision;
}
