private void SubscribeToChanges <TView, TViewModel>(RegistredView <TView, TViewModel> view)
where TView : class, IView
where TViewModel : class, INotifyPropertyChanged, IActivable
{
var disposable = view.ViewModel.ObservePropertyChange(x => x.IsActive).Where(x => x).Subscribe((x) =>
{
navigationProvider.Navigate(view);
}, err => throw err);
if (!ActivateSubscriptions.TryGetValue(view, out var subscription))
{
ActivateSubscriptions.Add(view, disposable);
}
else
{
subscription.Dispose();
ActivateSubscriptions[view] = disposable;
}
}
public IRegionManager RegisterView <TView, TViewModel>(
string regionName,
TViewModel viewModel,
bool containsNestedRegion,
out Guid guid,
IRegionManager parentRegionManager = null)
where TView : class, IView
where TViewModel : class, INotifyPropertyChanged, IActivable
{
var registredView = Views.SingleOrDefault(x => x.ViewName == RegistredView <TView, TViewModel> .GetViewName(regionName, viewModel));
if (registredView == null)
{
IRegionManager actualRegionManager = null;
if (parentRegionManager != null)
{
actualRegionManager = parentRegionManager;
}
else
{
actualRegionManager = regionManagers.Single(x => x.Regions.Any(y => y.Name == regionName));
}
if (actualRegionManager.Regions.Count(x => x.Name == regionName) == 0)
{
throw new Exception($"RegionManager does not contains region {regionName}");
}
var view = Application.Current?.Dispatcher?.Invoke(() =>
{
return(CreateView <TView, TViewModel>(regionName, viewModel, actualRegionManager, containsNestedRegion));
});
Views.Add(view);
guid = view.Guid;
SubscribeToChanges(view);
var regionManager = view.RegionManager;
if (regionManager != null)
{
regionManagers.Add(regionManager);
}
return(regionManager);
}
else if (registredView is RegistredView <TView, TViewModel> view)
{
view.ViewModel = viewModel;
guid = view.Guid;
SubscribeToChanges(view);
return(view.RegionManager);
}
else
{
throw new NotImplementedException();
}
}