private void ViewModel_OnPresenterNeedsToNavigate(object sender, BaseViewModel e)
{
UIViewController viewController = ViewModelToViewConverter.Convert(e);
MyNavigationController.ShowViewController(viewController, null);
_liveViews.Add(new Tuple <BaseViewModel, UIViewController>(e, viewController));
}
private void ListOfViewModelsPresenter_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (_viewModels != sender)
{
return;
}
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
// If simply adding one new one, animate with push
if (e.NewItems.Count == 1 && e.NewStartingIndex == _liveViews.Count)
{
UIViewController viewController = ViewModelToViewConverter.Convert(e.NewItems[0] as BaseViewModel);
base.ShowViewController(viewController, null);
_liveViews.Add(new Tuple <BaseViewModel, UIViewController>(e.NewItems[0] as BaseViewModel, viewController));
}
else
{
Add(e.NewStartingIndex, e.NewItems.OfType <BaseViewModel>().ToArray());
}
break;
case NotifyCollectionChangedAction.Remove:
// If removing the last (and we have multiple), simply go back
if (e.OldItems.Count == 1 && e.OldStartingIndex == _liveViews.Count - 1 && base.ViewControllers.Length > 1)
{
base.PopViewController(true);
_liveViews.RemoveAt(e.OldStartingIndex);
}
else
{
Remove(e.OldStartingIndex, e.OldItems.Count);
}
break;
case NotifyCollectionChangedAction.Move:
List <UIViewController> final = new List <UIViewController>(base.ViewControllers);
MoveRange(final, e.OldStartingIndex, e.NewStartingIndex, e.NewItems.Count);
base.ViewControllers = final.ToArray();
MoveRange(_liveViews, e.OldStartingIndex, e.NewStartingIndex, e.NewItems.Count);
break;
case NotifyCollectionChangedAction.Replace:
Remove(e.OldStartingIndex, e.OldItems.Count);
Add(e.NewStartingIndex, e.NewItems.OfType <BaseViewModel>().ToArray());
break;
case NotifyCollectionChangedAction.Reset:
Reset();
break;
}
}
private void Add(int index, BaseViewModel[] items)
{
var viewControllers = base.ViewControllers.ToList();
foreach (var item in items)
{
UIViewController viewController = ViewModelToViewConverter.Convert(item);
viewControllers.Insert(index, viewController);
_liveViews.Insert(index, new Tuple <BaseViewModel, UIViewController>(item, viewController));
index++;
}
base.ViewControllers = viewControllers.ToArray();
}
private void Reset()
{
Remove(0, _liveViews.Count);
List <UIViewController> newControllers = new List <UIViewController>();
if (_viewModels != null)
{
foreach (var model in _viewModels)
{
var view = ViewModelToViewConverter.Convert(model);
newControllers.Add(view);
_liveViews.Add(new Tuple <BaseViewModel, UIViewController>(model, view));
}
}
base.ViewControllers = newControllers.ToArray();
}
private void ViewModel_OnPresenterNeedsToReplaceWithinBackStack(object sender, Tuple <BaseViewModel, BaseViewModel> e)
{
var matchingView = FindViewMatchingViewModel(e.Item1);
if (matchingView != null)
{
var updatedControllers = MyNavigationController.ViewControllers.ToArray();
int index = updatedControllers.ToList().IndexOf(matchingView);
UIViewController viewController = ViewModelToViewConverter.Convert(e.Item2);
updatedControllers[index] = viewController;
MyNavigationController.ViewControllers = updatedControllers;
_liveViews.RemoveWhere(i => i.Item1 == e.Item1);
_liveViews.Add(new Tuple <BaseViewModel, UIViewController>(e.Item2, viewController));
}
}
