void UpdateFrameContent()
{
var model = Frame.CurrentContentViewModel;
if (model == null)
{
if (_currentView != null)
{
_currentView.ViewModel = null;
}
View.Content = null;
return;
}
if (_currentView?.ViewModel == model)
{
return;
}
var view = _currentView = (IBindableView)Service <IViewFactory> .Get().CreateView(model.GetPrefix(), model.GetViewStyle());
view.ViewModel = model;
var ext = Frame.GetExtension <ICustomContentPresenter>();
if (ext != null)
{
ext.Present(View, view);
}
else
{
View.Content = view;
}
}
void OnNavigated(object sender, NavigationEventArgs e)
{
var view = e.Content as IBindableView;
_currentView = view;
if (view != null)
{
if (view.ViewModel != null)
{
_viewmodelsHistoryCache.Remove(view);
_viewmodelsHistoryCache.Add(view, view.ViewModel);
}
else
{
if (_viewmodelsHistoryCache.TryGetValue(view, out ViewModel viewModel))
{
view.ViewModel = viewModel;
}
}
if (Frame.CurrentContentViewModel != view.ViewModel)
{
Frame.CurrentContentViewModel = view.ViewModel;
}
}
Frame.CanGoBack = View.CanGoBack;
Frame.CanGoForward = View.CanGoForward;
}
public static Binding <TSource, TTarget> CreateFromBindableView(IBindableView <TSource> bindableView, TTarget target)
{
var binding = new Binding <TSource, TTarget>(bindableView.ViewModel, target);
Bindings.SetBindableView(binding.BindingGroup, bindableView);
return(binding);
}
/// <summary>
/// Set DataContext with reloads existing bindings.
/// </summary>
/// <param name="self">Bindable View.</param>
/// <param name="dataContext">DataContext.</param>
public static void ReloadDataContext(this IBindableView self, object dataContext)
{
self.DoDetachBindings();
self.SetDataContext(dataContext);
self.DoAttachBindings();
}
protected override void OnBind()
{
View.JournalOwnership = JournalOwnership.OwnsJournal;
_currentView = View.Content as IBindableView;
SubscribeOnPropertyChanged(Frame, nameof(INavigationPanelFrame.CurrentContentViewModel), UpdateFrameContent);
UpdateFrameContent();
Frame.GoBack = GoBack;
Frame.GoForward = GoForward;
View.Navigated += OnNavigated;
}
public static void BindVM <TDescriptor>(
IBindableView <IViewModelExpression <TDescriptor> > view,
Action <IVMBinder <TDescriptor> > bindingConfigurator
) where TDescriptor : IVMDescriptor
{
if (DesignerProperties.GetIsInDesignMode((DependencyObject)view))
{
return;
}
VMPropertyBinder <TDescriptor> binder = new VMPropertyBinder <TDescriptor>();
bindingConfigurator(binder);
binder.Execute();
}
public void Init(IBindableView view)
{
var disposableObject = new DisposableObject();
disposableObject.Add(view.Binding());
IDisposable disposable = Disposable.Empty;
disposable = view.DisposableNotification().Subscribe(
_ =>
{
disposable.Dispose();
disposableObject.Dispose();
DisposableObject obj;
_dictionary.TryRemove(view, out obj);
});
_dictionary.TryAdd(view, disposableObject);
}
void OnSelectedItemsChanged()
{
var indexes = Frame.SelectedItemsIndexes;
if (indexes.IsNullOrEmpty())
{
if (_currentView == null)
{
return;
}
_currentView.ViewModel = null;
View.Content = null;
return;
}
var model = Frame.GetItemAtIndex(indexes[0]);
var view = _currentView = (IBindableView)Service <IViewFactory> .Get().CreateView(model.GetPrefix(), model.GetViewStyle());
view.ViewModel = model;
View.Content = view;
}
public void Present(System.Windows.Controls.Frame frame, IBindableView content)
{
var currentContent = (UIElement)frame.Content;
if (currentContent == content)
{
return;
}
Action complete = () => frame.Content = content;
if (currentContent != null)
{
var fadeOutAnimation = new DoubleAnimation(0d, TimeSpan.FromSeconds(0.25));
fadeOutAnimation.Completed += (s, e) => complete();
currentContent.BeginAnimation(UIElement.OpacityProperty, fadeOutAnimation);
}
else
{
complete();
}
}
public static IBinding <TSource, TTarget> Bind <TSource, TTarget>(this IBindableView <TSource> self, TTarget target)
where TSource : class
where TTarget : class
{
return(Binding <TSource, TTarget> .CreateFromBindableView(self, target));
}
internal static void SetBindableView(BindingGroup group, IBindableView bindableView)
{
BindableViews[group.Id] = new WeakReference <IBindableView>(bindableView);
}
