void UnitConverterViewModel::OnPropertyChanged()

in src/CalcViewModel/UnitConverterViewModel.cpp [557:629]
66 lines of code
19 McCabe index (conditional complexity)

void UnitConverterViewModel::OnPropertyChanged(Platform::String ^ prop)
{
    static bool isCategoryChanging = false;

    if (prop == CurrentCategoryPropertyName)
    {
        isCategoryChanging = true;
        CategoryChanged->Execute(nullptr);
        isCategoryChanging = false;
    }
    else if (prop == Unit1PropertyName || prop == Unit2PropertyName)
    {
        // Category changes will handle updating units after they've both been updated.
        // This event should only be used to update units from explicit user interaction.
        if (!isCategoryChanging)
        {
            UnitChanged->Execute(nullptr);
        }
        // Get the localized automation name for each CalculationResults field
        if (prop == Unit1PropertyName)
        {
            UpdateValue1AutomationName();
        }
        else
        {
            UpdateValue2AutomationName();
        }
    }
    else if (prop == Value1PropertyName)
    {
        UpdateValue1AutomationName();
    }
    else if (prop == Value2PropertyName)
    {
        UpdateValue2AutomationName();
    }
    else if (prop == Value1ActivePropertyName || prop == Value2ActivePropertyName)
    {
        // if one of the values is activated, and as a result both are true, it means
        // that we're trying to switch.
        if (Value1Active && Value2Active)
        {
            SwitchActive->Execute(nullptr);
        }

        UpdateValue1AutomationName();
        UpdateValue2AutomationName();
    }
    else if (prop == SupplementaryResultsPropertyName)
    {
        RaisePropertyChanged(SupplementaryVisibilityPropertyName);
    }
    else if (prop == Value1AutomationNamePropertyName)
    {
        m_isValue1Updating = false;
        if (!m_isValue2Updating)
        {
            AnnounceConversionResult();
        }
    }
    else if (prop == Value2AutomationNamePropertyName)
    {
        m_isValue2Updating = false;
        if (!m_isValue1Updating)
        {
            AnnounceConversionResult();
        }
    }
    else if (prop == CurrencySymbol1PropertyName || prop == CurrencySymbol2PropertyName)
    {
        RaisePropertyChanged(CurrencySymbolVisibilityPropertyName);
    }
}