/// <summary>
/// Creates the page.
/// </summary>
/// <param name="rootModel">The root model.</param>
/// <param name="context">The context.</param>
/// <param name="settings">The optional popup settings.</param>
/// <returns>The page.</returns>
public virtual async Task <Page> CreatePageAsync(object rootModel, object context, IDictionary <string, object> settings)
{
var view = EnsurePage(rootModel, ViewLocator.LocateForModel(rootModel, null, context));
ViewModelBinder.Bind(rootModel, view, context);
var haveDisplayName = rootModel as IHaveDisplayName;
if (string.IsNullOrEmpty(view.Title) && haveDisplayName != null && !ConventionManager.HasBinding(view, Page.TitleProperty))
{
var binding = new Binding("DisplayName")
{
Mode = BindingMode.TwoWay
};
view.SetBinding(Page.TitleProperty, binding);
}
ApplySettings(view, settings);
if (rootModel is IActivate activator)
{
await activator.ActivateAsync();
}
if (rootModel is IDeactivate deactivatable)
{
view.Unloaded += async(s, e) => await deactivatable.DeactivateAsync(true);
}
return(view);
}
private async Task PushAsync(Element view, object parameter, bool animated)
{
var page = view as Page;
if (page == null && !(view is ContentView))
{
throw new NotSupportedException(String.Format("{0} does not inherit from either {1} or {2}.", view.GetType(), typeof(Page), typeof(ContentView)));
}
var viewModel = ViewModelLocator.LocateForView(view);
if (viewModel != null)
{
TryInjectParameters(viewModel, parameter);
ViewModelBinder.Bind(viewModel, view, null);
if (viewModel is IActivate activator)
{
await activator.ActivateAsync();
}
}
var contentView = view as ContentView;
if (contentView != null)
{
page = CreateContentPage(contentView, viewModel);
}
await navigationPage.PushAsync(page, animated);
}
/// <summary>
/// Creates a window.
/// </summary>
/// <param name="rootModel">The view model.</param>
/// <param name="isDialog">Whethor or not the window is being shown as a dialog.</param>
/// <param name="context">The view context.</param>
/// <param name="settings">The optional popup settings.</param>
/// <returns>The window.</returns>
protected virtual async Task <Window> CreateWindowAsync(object rootModel, bool isDialog, object context, IDictionary <string, object> settings)
{
var view = EnsureWindow(rootModel, ViewLocator.LocateForModel(rootModel, null, context), isDialog);
ViewModelBinder.Bind(rootModel, view, context);
var haveDisplayName = rootModel as IHaveDisplayName;
if (string.IsNullOrEmpty(view.Title) && haveDisplayName != null && !ConventionManager.HasBinding(view, Window.TitleProperty))
{
var binding = new Binding("DisplayName")
{
Mode = BindingMode.TwoWay
};
view.SetBinding(Window.TitleProperty, binding);
}
ApplySettings(view, settings);
var conductor = new WindowConductor(rootModel, view);
await conductor.InitialiseAsync();
return(view);
}
static void ModelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (View.InDesignMode || e.NewValue == null || e.NewValue == e.OldValue)
{
return;
}
var fe = d as FrameworkElement;
if (fe == null)
{
return;
}
View.ExecuteOnLoad(fe, delegate {
var target = e.NewValue;
d.SetValue(View.IsScopeRootProperty, true);
#if XFORMS
var context = fe.Id.ToString("N");
#else
var context = string.IsNullOrEmpty(fe.Name)
? fe.GetHashCode().ToString()
: fe.Name;
#endif
ViewModelBinder.Bind(target, d, context);
});
}
static void DataContextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (!View.InDesignMode)
{
return;
}
var enable = d.GetValue(AtDesignTimeProperty);
if (enable == null || ((bool)enable) == false || e.NewValue == null)
{
return;
}
var fe = d as FrameworkElement;
if (fe == null)
{
return;
}
#if XFORMS
ViewModelBinder.Bind(e.NewValue, d, fe.Id.ToString("N"));
#else
ViewModelBinder.Bind(e.NewValue, d, string.IsNullOrEmpty(fe.Name) ? fe.GetHashCode().ToString() : fe.Name);
#endif
}
static void OnContextChanged(DependencyObject targetLocation, DependencyPropertyChangedEventArgs e)
{
if (e.OldValue == e.NewValue)
{
return;
}
var model = GetModel(targetLocation);
if (model == null)
{
return;
}
var view = ViewLocator.LocateForModel(model, targetLocation, e.NewValue);
if (!SetContentProperty(targetLocation, view))
{
Log.Warn("SetContentProperty failed for ViewLocator.LocateForModel, falling back to LocateForModelType");
view = ViewLocator.LocateForModelType(model.GetType(), targetLocation, e.NewValue);
SetContentProperty(targetLocation, view);
}
ViewModelBinder.Bind(model, view, e.NewValue);
}
static void OnModelChanged(DependencyObject targetLocation, DependencyPropertyChangedEventArgs args)
{
if (args.OldValue == args.NewValue)
{
return;
}
if (args.NewValue != null)
{
var context = GetContext(targetLocation);
var view = ViewLocator.LocateForModel(args.NewValue, targetLocation, context);
ViewModelBinder.Bind(args.NewValue, view, context);
if (!SetContentProperty(targetLocation, view))
{
Log.Warn("SetContentProperty failed for ViewLocator.LocateForModel, falling back to LocateForModelType");
view = ViewLocator.LocateForModelType(args.NewValue.GetType(), targetLocation, context);
SetContentProperty(targetLocation, view);
}
}
else
{
SetContentProperty(targetLocation, args.NewValue);
}
}
/// <summary>
/// Locates the view model, locates the associate view, binds them and shows it as the root view.
/// </summary>
/// <param name="viewModelType">The view model type.</param>
/// <param name="cancellationToken">A cancellation token that can be used by other objects or threads to receive notice of cancellation.</param>
/// <returns>A task that represents the asynchronous operation.</returns>
protected async Task DisplayRootViewForAsync(Type viewModelType, CancellationToken cancellationToken)
{
Initialize();
var viewModel = IoC.GetInstance(viewModelType, null);
var view = ViewLocator.LocateForModel(viewModel, null, null);
ViewModelBinder.Bind(viewModel, view, null);
if (viewModel is IActivate activator)
{
await activator.ActivateAsync(cancellationToken);
}
Window.Current.Content = view;
Window.Current.Activate();
}
/// <summary>
/// Locates the view model, locates the associate view, binds them and shows it as the root view.
/// </summary>
/// <param name="viewModelType">The view model type.</param>
protected async Task DisplayRootViewForAsync(Type viewModelType)
{
var viewModel = IoC.GetInstance(viewModelType, null);
var view = ViewLocator.LocateForModel(viewModel, null, null);
if (!(view is Page page))
{
throw new NotSupportedException(String.Format("{0} does not inherit from {1}.", view.GetType(), typeof(Page)));
}
ViewModelBinder.Bind(viewModel, view, null);
if (viewModel is IActivate activator)
{
await activator.ActivateAsync();
}
MainPage = page;
}
/// <summary>
/// Occurs after navigation
/// </summary>
/// <param name="sender"> The event sender. </param>
/// <param name="e"> The event args. </param>
protected virtual async void OnNavigated(object sender, NavigationEventArgs e)
{
if (e.Uri.IsAbsoluteUri || e.Content == null)
{
return;
}
ViewLocator.InitializeComponent(e.Content);
var viewModel = ViewModelLocator.LocateForView(e.Content);
if (viewModel == null)
{
return;
}
var page = e.Content as Page;
if (page == null)
{
throw new ArgumentException("View '" + e.Content.GetType().FullName + "' should inherit from Page or one of its descendents.");
}
if (treatViewAsLoaded)
{
page.SetValue(View.IsLoadedProperty, true);
}
TryInjectParameters(viewModel, e.ExtraData);
ViewModelBinder.Bind(viewModel, page, null);
if (viewModel is IActivate activator)
{
await activator.ActivateAsync();
}
GC.Collect();
}
/// <summary>
/// Locates the view model, locates the associate view, binds them and shows it as the root view.
/// </summary>
/// <param name="viewModelType">The view model type.</param>
protected void DisplayRootViewFor(Type viewModelType)
{
var viewModel = IoC.GetInstance(viewModelType, null);
var view = ViewLocator.LocateForModel(viewModel, null, null);
var page = view as Page;
if (page == null)
{
throw new NotSupportedException(String.Format("{0} does not inherit from {1}.", view.GetType(), typeof(Page)));
}
ViewModelBinder.Bind(viewModel, view, null);
var activator = viewModel as IActivate;
if (activator != null)
{
activator.Activate();
}
MainPage = page;
}
private Task PushAsync(Element view, object parameter, bool animated)
{
var page = view as Page;
if (page == null)
{
throw new NotSupportedException(String.Format("{0} does not inherit from {1}.", view.GetType(), typeof(Page)));
}
var viewModel = ViewModelLocator.LocateForView(view);
if (viewModel != null)
{
TryInjectParameters(viewModel, parameter);
ViewModelBinder.Bind(viewModel, view, null);
}
page.Appearing += (s, e) => ActivateView(page);
page.Disappearing += (s, e) => DeactivateView(page);
return(navigationPage.PushAsync(page, animated));
}
/// <summary>
/// Shows a popup at the current mouse position.
/// </summary>
/// <param name="rootModel">The root model.</param>
/// <param name="context">The view context.</param>
/// <param name="settings">The optional popup settings.</param>
public virtual async Task ShowPopupAsync(object rootModel, object context = null, IDictionary <string, object> settings = null)
{
var popup = CreatePopup(rootModel, settings);
var view = ViewLocator.LocateForModel(rootModel, popup, context);
popup.Child = view;
popup.SetValue(View.IsGeneratedProperty, true);
ViewModelBinder.Bind(rootModel, popup, null);
Action.SetTargetWithoutContext(view, rootModel);
if (rootModel is IActivate activator)
{
await activator.ActivateAsync();
}
if (rootModel is IDeactivate deactivator)
{
popup.Closed += async(s, e) => await deactivator.DeactivateAsync(true);
}
popup.IsOpen = true;
popup.CaptureMouse();
}
/// <summary>
/// Binds the view model.
/// </summary>
/// <param name="view">The view.</param>
/// <param name="viewModel">The view model.</param>
protected virtual async Task BindViewModel(DependencyObject view, object viewModel = null)
{
ViewLocator.InitializeComponent(view);
viewModel = viewModel ?? ViewModelLocator.LocateForView(view);
if (viewModel == null)
{
return;
}
if (treatViewAsLoaded)
{
view.SetValue(View.IsLoadedProperty, true);
}
TryInjectParameters(viewModel, CurrentParameter);
ViewModelBinder.Bind(viewModel, view, null);
if (viewModel is IActivate activator)
{
await activator.ActivateAsync();
}
}
