private void InitializeSubjects(IEnumerable<AssociatedSubject> subjects)
{
TaskScheduler scheduler = TaskScheduler.FromCurrentSynchronizationContext();
Task.Factory.StartNew(
() =>
{
var domainSubjects = _subjectQuery.All.Select(s => s).ToList();
List<AssociatedSubjectViewModel> viewModels = new List<AssociatedSubjectViewModel>();
foreach (var subject in subjects)
{
var domainSubject = domainSubjects.Where(s => s.Id == subject.SubjectId).FirstOrDefault();
if (domainSubject != null)
{
var viewModel = new AssociatedSubjectViewModel(
subject, _subjectValidator, domainSubject, _busId
);
AttachEvents(viewModel);
viewModels.Add(
viewModel
);
}
}
return viewModels;
}
)
.ContinueWith(
task =>
{
AssociatedSubjects = new ObservableCollection<AssociatedSubjectViewModel>(task.Result);
InitializeAvailableSubjects();
},
scheduler
);
}
private void RemoveAssociatedSubject(AssociatedSubjectViewModel viewModel)
{
DettachEvents(viewModel);
_associatedSubjects.Remove(viewModel);
AddAvailableSubject(viewModel.AssociatedSubject.SubjectId);
RaiseSubjectRemoved(viewModel.AssociatedSubject);
NotifyDirtyHasChanged();
}
private void DettachEvents(AssociatedSubjectViewModel viewModel)
{
viewModel.IsDirtyChangedEvent -= IsDirtyChangedHandler;
viewModel.RequestRemovalEvent -= RequestRemovalHandler;
}
private void AddAssociatedSubject(Subject subject)
{
var viewModel =
new AssociatedSubjectViewModel(
new AssociatedSubject() { SubjectId = subject.Id, Points = 0 },
_subjectValidator,
subject,
_busId
);
RemoveAvailableSubject(subject);
AttachEvents(viewModel);
_associatedSubjects.Add(viewModel);
RaiseSubjectAdded(viewModel.AssociatedSubject);
NotifyDirtyHasChanged();
}