public RemoveQuestion(QuestionViewModel question)
{
if (question == null)
throw new ArgumentNullException("question");
_question = question;
}
private void NewQuestion()
{
NotifyIsDirty();
var vm = new QuestionViewModel(
new Domain.Question(),
_questionValidator,
_answerValidator,
_subjectValidator,
_subjectQuery,
_busId
);
AddQuestion(vm);
_view.MoveCurrentTo(vm);
}
private void RemoveQuestion(QuestionViewModel question)
{
NotifyIsDirty();
DettachEvents(question);
_questions.Remove(question);
RaiseQuestionRemoved(question.Question);
}
private bool CanRemoveQuestion(QuestionViewModel question)
{
return (question != null && _questions.Contains(question));
}
private void DettachEvents(QuestionViewModel question)
{
question.IsDirtyChangedEvent -= QuestionIsDirtyHandler;
question.PropertyChanged -= QuestionChangedHandler;
}
private void AddQuestion(QuestionViewModel question)
{
AttachEvents(question);
this._questions.Add(question);
RaiseQuestionAdded(question.Question);
}