private static bool PersistInHistory(object view)
{
bool persist = true;
MvvmHelpers.ViewAndViewModelAction <IJournalAware>(view, ija => { persist &= ija.PersistInHistory(); });
return(persist);
}
private void InvokeOnSynchronizedActiveAwareChildren(object item, Action <IActiveAware> invocation)
{
var dependencyObjectView = item as DependencyObject;
if (dependencyObjectView != null)
{
// We are assuming that any scoped region managers are attached directly to the
// view.
var regionManager = RegionManager.GetRegionManager(dependencyObjectView);
// If the view's RegionManager attached property is different from the region's RegionManager,
// then the view's region manager is a scoped region manager.
if (regionManager == null || regionManager == this.Region.RegionManager)
{
return;
}
var activeViews = regionManager.Regions.SelectMany(e => e.ActiveViews);
var syncActiveViews = activeViews.Where(ShouldSyncActiveState);
foreach (var syncActiveView in syncActiveViews)
{
MvvmHelpers.ViewAndViewModelAction(syncActiveView, invocation);
}
}
}
public IDialogResult ShowWindow(string name)
{
IDialogResult dialogResult = new DialogResult(ButtonResult.None);
var content = _containerExtension.Resolve <object>(name);
if (!(content is Window dialogContent))
{
throw new NullReferenceException("A dialog's content must be a Window");
}
if (dialogContent is Window view && view.DataContext is null && ViewModelLocator.GetAutoWireViewModel(view) is null)
{
ViewModelLocator.SetAutoWireViewModel(view, true);
}
if (!(dialogContent.DataContext is IDialogAware viewModel))
{
throw new NullReferenceException("A dialog's ViewModel must implement the IDialogAware interface");
}
if (dialogContent is IDialogWindow dialogWindow)
{
ConfigureDialogWindowEvents(dialogWindow, result => { dialogResult = result; });
}
MvvmHelpers.ViewAndViewModelAction <IDialogAware>(viewModel, d => d.OnDialogOpened(null));
dialogContent.ShowDialog();
return(dialogResult);
}
private static void InvokeOnNavigationAwareElements(IEnumerable <object> items, Action <INavigationAware> invocation)
{
foreach (var item in items)
{
MvvmHelpers.ViewAndViewModelAction(item, invocation);
}
}
private void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
foreach (object item in e.NewItems)
{
Action <IActiveAware> invocation = activeAware => activeAware.IsActive = true;
MvvmHelpers.ViewAndViewModelAction(item, invocation);
InvokeOnSynchronizedActiveAwareChildren(item, invocation);
}
}
else if (e.Action == NotifyCollectionChangedAction.Remove)
{
foreach (object item in e.OldItems)
{
Action <IActiveAware> invocation = activeAware => activeAware.IsActive = false;
MvvmHelpers.ViewAndViewModelAction(item, invocation);
InvokeOnSynchronizedActiveAwareChildren(item, invocation);
}
}
// May need to handle other action values (reset, replace). Currently the ViewsCollection class does not raise CollectionChanged with these values.
}
protected override void PrepareContentForWindow(INotification notification, Window wrapperWindow)
{
void setNotificationAndClose(IInteractionRequestAware iira)
{
iira.Notification = notification;
iira.FinishInteraction = () => wrapperWindow.Close();
}
if (this.WindowContent != null)
{
// We set the WindowContent as the content of the window.
if (wrapperWindow is Views.Dialogs.PopupMetroWindow metroWindow)
{
metroWindow.MainControl.Content = this.WindowContent;
MvvmHelpers.ViewAndViewModelAction <IInteractionRequestAware>(metroWindow.MainControl.Content, setNotificationAndClose);
return;
}
else
{
wrapperWindow.Content = this.WindowContent;
}
}
else if (this.WindowContentType != null)
{
wrapperWindow.Content = ServiceLocator.Current.GetInstance(this.WindowContentType);
}
else
{
return;
}
MvvmHelpers.ViewAndViewModelAction <IInteractionRequestAware>(wrapperWindow.Content, setNotificationAndClose);
}
protected override void OnDetaching()
{
RegionManager.SetRegionManager(this.AssociatedObject, null);
Action <IRegionManagerAware> resetRegionManager = x => x.RegionManager = null;
MvvmHelpers.ViewAndViewModelAction(this.AssociatedObject, resetRegionManager);
}
protected override void Invoke(object parameter)
{
var args = parameter as InteractionRequestedEventArgs;
if (args == null)
{
return;
}
var notification = args.Context as PopupNotification;
var window = new PopupWindow();
Action <IInteractionRequestAware> setNotificationAndClose = (iira) =>
{
iira.Notification = notification;
iira.FinishInteraction = () =>
{
args.Callback();
window.Close();
window = null;
};
};
MvvmHelpers.ViewAndViewModelAction(window.Content, setNotificationAndClose);
window.Show();
}
private void ExecuteNavigation(NavigationContext navigationContext, object[] activeViews, Action <NavigationResult> navigationCallback)
{
try
{
NotifyActiveViewsNavigatingFrom(navigationContext, activeViews);
object view = this.regionNavigationContentLoader.LoadContent(this.Region, navigationContext);
// Raise the navigating event just before activing the view.
this.RaiseNavigating(navigationContext);
this.Region.Activate(view);
// Update the navigation journal before notifying others of navigaton
IRegionNavigationJournalEntry journalEntry = this.serviceLocator.GetInstance <IRegionNavigationJournalEntry>();
journalEntry.Uri = navigationContext.Uri;
journalEntry.Parameters = navigationContext.Parameters;
this.journal.RecordNavigation(journalEntry);
// The view can be informed of navigation
Action <INavigationAware> action = (n) => n.OnNavigatedTo(navigationContext);
MvvmHelpers.ViewAndViewModelAction(view, action);
navigationCallback(new NavigationResult(navigationContext, true));
// Raise the navigated event when navigation is completed.
this.RaiseNavigated(navigationContext);
}
catch (Exception e)
{
this.NotifyNavigationFailed(navigationContext, navigationCallback, e);
}
}
private static bool PersistInHistory(object[] activeViews)
{
bool persist = true;
if (activeViews.Length > 0)
{
MvvmHelpers.ViewAndViewModelAction <IJournalAware>(activeViews[0], ija => { persist &= ija.PersistInHistory(); });
}
return(persist);
}
protected override void OnAttached()
{
var rm = ServiceLocator.Current.GetInstance <IRegionManager>();
var newRegionManager = rm.CreateRegionManager();
RegionManager.SetRegionManager(this.AssociatedObject, newRegionManager);
Action <IRegionManagerAware> setRegionManager = x => x.RegionManager = newRegionManager;
MvvmHelpers.ViewAndViewModelAction(this.AssociatedObject, setRegionManager);
}
private void Views_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Remove)
{
foreach (var item in e.OldItems)
{
Action <IDestructible> invocation = destructible => destructible.Destroy();
MvvmHelpers.ViewAndViewModelAction(item, invocation);
}
}
}
private void Views_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Remove)
{
Action <IDisposable> DisposeCaller = d => d.Dispose();
foreach (var i in e.OldItems)
{
MvvmHelpers.ViewAndViewModelAction(i, DisposeCaller);
}
}
}
private void Views_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action != NotifyCollectionChangedAction.Remove || e.Action != NotifyCollectionChangedAction.Replace)
{
return;
}
foreach (var removedView in e.OldItems)
{
MvvmHelpers.ViewAndViewModelAction <IDisposable>(removedView, d => d.Dispose());
}
}
public virtual void ShowShell <T>() where T : Window
{
IRegionManager regionManager = new RegionManager();
var window = locator.GetInstance <T>();
RegionManager.SetRegionManager(window, regionManager);
// try to Set IRegionManagerAware for Shell ViewModel
MvvmHelpers.ViewAndViewModelAction <IRegionManagerAware>(window, v => v.RegionManager = regionManager);
InitializeShell(window);
window.Show();
}
private void ActiveViews_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
Action <IRegionManagerAware> setRegionManager = x => x.RegionManager = this.Region.RegionManager;
MvvmHelpers.ViewAndViewModelAction(e.NewItems[0], setRegionManager);
break;
case NotifyCollectionChangedAction.Remove:
Action <IRegionManagerAware> resetRegionManager = x => x.RegionManager = null;
MvvmHelpers.ViewAndViewModelAction(e.OldItems[0], resetRegionManager);
break;
}
}
// Methods.
/// <summary>
/// Displays the child FrameworkElement and collects results for <see cref="IInteractionRequest"/>.
/// </summary>
/// <param name="parameter"></param>
protected override void Invoke(object parameter)
{
var args = parameter as InteractionRequestedEventArgs;
if (args == null)
{
return;
}
// Add specified framework element to the current window.
var window = Window.GetWindow(AssociatedObject);
// Create a DockPanel that will act as a shadow for the specified framework element. It will also make the framework element "modal" by blocking off the rest of the window as long as the framework element is active.
var backgroundElement = new DockPanel {
Background = new SolidColorBrush(Color.FromArgb(90, 0, 0, 0)), VerticalAlignment = VerticalAlignment.Stretch, HorizontalAlignment = HorizontalAlignment.Stretch
};
backgroundElement.SetValue(Grid.ColumnSpanProperty, 20);
backgroundElement.SetValue(Grid.RowSpanProperty, 20);
// Find the first grid in the window,- works well enough for my purpose. One could modify this so that it accepts a name and/or type, so that one can specify individual parts of a view.
Grid grid = window.FindElement <Grid>("");
grid.Children.Add(backgroundElement);
// If we haven't specified any content to show, alert the programmer.
if (FrameworkElementContent == null)
{
throw new Exception("No FrameworkElement has been specified as dialog content.");
}
backgroundElement.Children.Add(FrameworkElementContent);
Action <IInteractionRequestAware> setNotificationAndClose = (iira) =>
{
iira.Notification = args.Context;
iira.FinishInteraction = () =>
{
// Remove the child FrameworkElement (the dialog) and execute the callback method.
backgroundElement.Children.Remove(FrameworkElementContent);
grid.Children.Remove(backgroundElement);
args.Callback();
};
};
MvvmHelpers.ViewAndViewModelAction(FrameworkElementContent, setNotificationAndClose);
}
protected virtual void ViewsCollectionChanged(object sender, NotifyCollectionChangedEventArgs eventArgs)
{
//Eventの種類を確認
switch (eventArgs.Action)
{
case NotifyCollectionChangedAction.Remove:
case NotifyCollectionChangedAction.Replace: {
foreach (object oldView in eventArgs.OldItems)
{
//ViewからViewModelを取り出して、Disposeする
MvvmHelpers.ViewAndViewModelAction <IDisposable>(oldView, d => d.Dispose());
}
break;
}
}
}
protected override IRegion CreateRegion(DependencyObject targetElement, string regionName)
{
if (targetElement == null)
{
throw new ArgumentNullException(nameof(targetElement));
}
IRegionManager regionManager = FindRegionManagerForScope(targetElement);
if (ContainsRegionWithName(regionManager, regionName))
{
regionManager = CreateRegionManagerForScope(targetElement);
}
MvvmHelpers.ViewAndViewModelAction <IRegionManagerAware>(targetElement, v => v.RegionManager = regionManager);
return(base.CreateRegion(targetElement, regionName));
}
/// <summary>
/// Checks if the WindowContent or its DataContext implements <see cref="IInteractionRequestAware"/>.
/// If so, it sets the corresponding value.
/// Also, if WindowContent does not have a RegionManager attached, it creates a new scoped RegionManager for it.
/// </summary>
/// <param name="notification">The notification to be set as a DataContext in the HostWindow.</param>
/// <param name="wrapperWindow">The HostWindow</param>
protected virtual void PrepareContentForWindow(INotification notification, Window wrapperWindow)
{
if (this.WindowContent == null)
{
return;
}
// We set the WindowContent as the content of the window.
wrapperWindow.Content = this.WindowContent;
Action <IInteractionRequestAware> setNotificationAndClose = (iira) =>
{
iira.Notification = notification;
iira.FinishInteraction = () => wrapperWindow.Close();
};
MvvmHelpers.ViewAndViewModelAction(this.WindowContent, setNotificationAndClose);
}
/// <summary>
/// Configure <see cref="IDialogWindow"/> content.
/// </summary>
/// <param name="dialogName">The name of the dialog to show.</param>
/// <param name="window">The hosting window.</param>
/// <param name="parameters">The parameters to pass to the dialog.</param>
protected virtual void ConfigureDialogWindowContent(string dialogName, IDialogWindow window, IDialogParameters parameters)
{
var content = _containerExtension.Resolve <object>(dialogName);
if (!(content is FrameworkElement dialogContent))
{
throw new NullReferenceException("A dialog's content must be a FrameworkElement");
}
MvvmHelpers.AutowireViewModel(dialogContent);
if (!(dialogContent.DataContext is IDialogAware viewModel))
{
throw new NullReferenceException("A dialog's ViewModel must implement the IDialogAware interface");
}
ConfigureDialogWindowProperties(window, dialogContent, viewModel);
MvvmHelpers.ViewAndViewModelAction <IDialogAware>(viewModel, d => d.OnDialogOpened(parameters));
}
/// <summary>
/// Configure <see cref="IDialogWindow"/> content.
/// </summary>
/// <param name="window">The hosting window.</param>
/// <param name="dialogName">The name of the dialog to show.</param>
/// <param name="parameters">The parameters to pass to the dialog.</param>
internal static void ConfigureDialogWindowContent(this IDialogWindow window, string dialogName, IDialogParameters parameters)
{
var content = ServiceLocator.Current.GetInstance <object>(dialogName);
var dialogContent = content as FrameworkElement;
if (dialogContent == null)
{
throw new NullReferenceException("A dialog's content must be a FrameworkElement");
}
var viewModel = dialogContent.DataContext as IDialogAware;
if (viewModel == null)
{
throw new NullReferenceException("A dialog's ViewModel must implement the IDialogAware interface");
}
ConfigureDialogWindowProperties(window, dialogContent, viewModel);
MvvmHelpers.ViewAndViewModelAction <IDialogAware>(viewModel, d => d.OnDialogOpened(parameters));
}
void ConfigureDialogWindowContent(string dialogName, IDialogWindow window, IDialogParameters parameters)
{
var content = _containerProvider.Resolve <object>(dialogName);
var dialogContent = content as FrameworkElement;
if (dialogContent == null)
{
throw new NullReferenceException("A dialog's content must be a FrameworkElement");
}
var viewModel = dialogContent.DataContext as IDialogAware;
if (viewModel == null)
{
throw new NullReferenceException($"A dialog's ViewModel must implement the IDialogAware interface ({dialogContent.DataContext})");
}
ConfigureDialogWindowProperties(window, dialogContent, viewModel);
MvvmHelpers.ViewAndViewModelAction <IDialogAware>(viewModel, d => d.OnDialogOpened(parameters));
}
void ConfigureDialogWindowContent(string dialogName, IDialogWindow window, IDialogParameters parameters)
{
var content = _containerExtension.Resolve <object>(dialogName);
var dialogContent = content as FrameworkElement;
if (dialogContent == null)
{
throw new NullReferenceException("A dialog's content must be a FrameworkElement");
}
var viewModel = dialogContent.DataContext as IDialogAware;
if (viewModel == null)
{
throw new NullReferenceException("A dialog's ViewModel must implement the IDialog interface");
}
MvvmHelpers.ViewAndViewModelAction <IDialogAware>(viewModel, d => d.OnDialogOpened(parameters));
window.Content = dialogContent;
window.DataContext = viewModel; //we want the host window and the dialog to share the same data contex
}
private void ShowDialogInternal(string name, IDialogParameters parameters, Action <IDialogResult> callback)
{
var content = ContainerExtension.Resolve <object>(name);
var dialogContent = content as FrameworkElement ?? throw new NullReferenceException("A dialog's content must be a FrameworkElement");
var viewModel = dialogContent.DataContext as IDialogAware ?? throw new NullReferenceException("A dialog's ViewModel must be IDialogAware");
MvvmHelpers.ViewAndViewModelAction <IDialogAware>(viewModel, d => d.OnDialogOpened(parameters));
var host = CustomHost.Host
?? throw new NullReferenceException("Dialog host must be specified in the ICustomDialogHost");
// Lazy show
host.IsOpen = true;
host.DialogContent = dialogContent;
viewModel.RequestClose += r =>
{
host.IsOpen = false;
callback?.Invoke(r);
host.DialogContent = null;
};
}
/// <summary>
/// Checks if the WindowContent or its DataContext implements <see cref="IInteractionRequestAware"/>.
/// If so, it sets the corresponding values.
/// </summary>
/// <param name="notification">The notification to be set as a DataContext in the HostWindow.</param>
/// <param name="wrapperWindow">The HostWindow</param>
protected virtual void PrepareContentForWindow(INotification notification, Window wrapperWindow)
{
if (WindowContent != null)
{
// We set the WindowContent as the content of the window.
wrapperWindow.Content = WindowContent;
}
else if (WindowContentType != null)
{
wrapperWindow.Content = ServiceLocator.Current.GetInstance(WindowContentType);
}
else
{
return;
}
Action <IInteractionRequestAware> setNotificationAndClose = (iira) =>
{
iira.Notification = notification;
iira.FinishInteraction = () => wrapperWindow.Close();
};
MvvmHelpers.ViewAndViewModelAction(wrapperWindow.Content, setNotificationAndClose);
}
protected virtual void ClearRegionManager(object item)
{
MvvmHelpers.ViewAndViewModelAction <IRegionManagerAware>(item, p => p.RegionManager = null);
}
protected virtual void SetRegionManagerAwareFor(object item)
{
IRegionManager regionManager = ResolveRegionManager(item);
MvvmHelpers.ViewAndViewModelAction <IRegionManagerAware>(item, p => p.RegionManager = regionManager);
}