private void RemoveFromSubjects(EditingSubjectViewModel subjectVM)
{
UnhookEvents(subjectVM);
_subjects.Remove(subjectVM);
}
private void UnhookCreationHandlers(EditingSubjectViewModel subjectViewModel)
{
subjectViewModel.ChangesCanceledEvent -= DiscardNewSubject;
subjectViewModel.ChangesSavedEvent -= EditCompleted;
}
private void AddToSubjects(EditingSubjectViewModel vm)
{
AttachEvents(vm);
_subjects.Add(vm);
}
private void InsertIntoSubjects(int idx, EditingSubjectViewModel editingVM)
{
AttachEvents(editingVM);
_subjects.Insert(idx, editingVM);
}
private void UnhookEvents(EditingSubjectViewModel alterSubjectViewModel)
{
if (alterSubjectViewModel != null)
{
alterSubjectViewModel.ChangesCanceledEvent -= EditCompleted;
}
}
private void AttachEvents(EditingSubjectViewModel editingVM)
{
editingVM.ChangesCanceledEvent += new EventHandler(EditCompleted);
editingVM.ChangesSavedEvent += new EventHandler(EditCompleted);
}
private void EditSubject(object sender, EventArgs e)
{
var subjectVM = sender as SubjectViewModel;
if (subjectVM != null)
{
int idx = _subjects.IndexOf(subjectVM);
if (idx >= 0)
{
var editingVM = new EditingSubjectViewModel(subjectVM.Subject, _subjectValidator);
RemoveFromSubjects(subjectVM);
InsertIntoSubjects(idx, editingVM);
IncreaseDirtyLevel();
}
}
}
