public void Load(IChoice choice)
{
if (choice == null)
{
throw new ArgumentNullException("choice");
}
this.choice = choice;
this.payment = null;
this.choiceViewModel = new ChoiceItemViewModel(this.Dispatcher, choice);
this.isValid = false;
this.isCancelled = false;
this.statusText.Text = string.Empty;
choiceContainer.DataContext = choiceViewModel;
choiceChildrenContainer.ItemsSource = choiceViewModel.Children;
var questionViewModel = choiceViewModel.Children.FirstOrDefault();
if (questionViewModel == null)
{
return;
}
if (!HasMultipleDescendants(questionViewModel))
{
ChooseRequiredAnswers(questionViewModel);
}
}
private void ChooseParent(ChoiceItemViewModel viewModel)
{
if (viewModel.Parent == null)
{
return;
}
viewModel.Parent.IsChosen = true;
ChooseParent(viewModel.Parent);
}
private void ChooseRequiredAnswers(ChoiceItemViewModel viewModel)
{
if (viewModel.Children.Count() != 1)
{
return;
}
var first = viewModel.Children.First();
first.IsChosen = true;
ChooseParent(first);
var childOfFirst = first.Children.FirstOrDefault();
if (childOfFirst != null)
{
ChooseRequiredAnswers(childOfFirst);
}
}
private bool HasMultipleDescendants(ChoiceItemViewModel viewModel)
{
var count = viewModel.Children.Count();
if (count == 0)
{
return(false);
}
else if (count == 1)
{
var first = viewModel.Children.First();
var childOfFirst = first.Children.FirstOrDefault();
if (childOfFirst != null)
{
return(HasMultipleDescendants(childOfFirst));
}
return(false);
}
else
{
return(true);
}
}
