void Init()
{
object vm = null;
if (Factory != null)
{
vm = Factory();
}
else if (ViewModelName != null)
{
vm = viewModelLocator.ResolveViewModel(ViewModelName);
}
if (vm == null)
{
ModuleInjectionException.NullVM();
}
viewModelRef = new WeakReference(vm);
InitParameter();
if (string.IsNullOrEmpty(ViewModelName))
{
ViewModelName = viewModelLocator.GetViewModelTypeName(vm.GetType());
}
InitViewType();
InitViewName();
}
#pragma warning disable AvoidAsyncVoid
async partial void NavigateWithParameters(string uri, Dictionary <string, object> parameters)
#pragma warning restore AvoidAsyncVoid
{
var viewType = Type.GetType(uri);
var viewModelType = _viewModelLocator.ResolveViewModel(viewType);
var view = (Page)_typeFactory.CreateInstance(viewType);
var viewModel = _viewModelFactory.CreateViewModel(viewModelType, parameters.Count > 0 ? parameters.Values.ToArray() : null);
view.BindingContext = viewModel;
var currentApplication = Application.Current;
var activePage = currentApplication.GetActivePage();
if (activePage is null)
{
return;
}
var navigation = activePage.Navigation;
if (navigation is null)
{
return;
}
await navigation.PushAsync(view);
}
/// <summary>
/// Initializes a new instance of the <see cref="UIViewController"/> class.
/// </summary>
public UIViewController()
{
if (CatelEnvironment.IsInDesignMode)
{
return;
}
var viewModelType = GetViewModelType();
if (viewModelType is null)
{
Log.Debug("GetViewModelType() returned null, using the ViewModelLocator to resolve the view model");
viewModelType = _viewModelLocator.ResolveViewModel(GetType());
if (viewModelType is null)
{
const string error = "The view model of the view could not be resolved. Use either the GetViewModelType() method or IViewModelLocator";
Log.Error(error);
throw new NotSupportedException(error);
}
}
_logic = new PageLogic(this, viewModelType);
_logic.TargetViewPropertyChanged += (sender, e) =>
{
OnPropertyChanged(e);
PropertyChanged?.Invoke(this, e);
};
_logic.ViewModelChanged += (sender, e) => RaiseViewModelChanged();
_logic.ViewModelPropertyChanged += (sender, e) =>
{
OnViewModelPropertyChanged(e);
ViewModelPropertyChanged?.Invoke(this, e);
};
_logic.DetermineViewModelInstance += (sender, e) =>
{
e.ViewModel = GetViewModelInstance(e.DataContext);
};
_logic.DetermineViewModelType += (sender, e) =>
{
e.ViewModelType = GetViewModelType(e.DataContext);
};
_logic.ViewLoading += (sender, e) => ViewLoading?.Invoke(this);
_logic.ViewLoaded += (sender, e) => ViewLoaded?.Invoke(this);
_logic.ViewUnloading += (sender, e) => ViewUnloading?.Invoke(this);
_logic.ViewUnloaded += (sender, e) => ViewUnloaded?.Invoke(this);
}
/// <summary>
/// Initializes a new instance of the <see cref="LogicBase"/> class.
/// </summary>
/// <param name="targetView">The target control.</param>
/// <param name="viewModelType">Type of the view model.</param>
/// <param name="viewModel">The view model.</param>
/// <exception cref="ArgumentNullException">The <paramref name="targetView"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentNullException">The <paramref name="viewModelType"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentNullException">The <paramref name="viewModelType"/> does not implement interface <see cref="IViewModel"/>.</exception>
protected LogicBase(IView targetView, Type viewModelType = null, IViewModel viewModel = null)
{
if (CatelEnvironment.IsInDesignMode)
{
return;
}
Argument.IsNotNull("targetView", targetView);
var targetViewType = targetView.GetType();
if (viewModelType is null)
{
viewModelType = (viewModel != null) ? viewModel.GetType() : _viewModelLocator.ResolveViewModel(targetViewType);
if (viewModelType is null)
{
throw Log.ErrorAndCreateException <NotSupportedException>($"The view model of the view '{targetViewType.Name}' could not be resolved. Make sure to customize the IViewModelLocator or register the view and view model manually");
}
}
UniqueIdentifier = UniqueIdentifierHelper.GetUniqueIdentifier <LogicBase>();
Log.Debug($"Constructing behavior '{GetType().Name}' for '{targetView.GetType().Name}' with unique id '{UniqueIdentifier}'");
TargetView = targetView;
ViewModelType = viewModelType;
ViewModel = viewModel;
ViewModelBehavior = (viewModel != null) ? LogicViewModelBehavior.Injected : LogicViewModelBehavior.Dynamic;
if (ViewModel != null)
{
SetDataContext(ViewModel);
}
Log.Debug("Subscribing to view events");
ViewLoadManager.AddView(this);
if (this.SubscribeToWeakGenericEvent <ViewLoadEventArgs>(ViewLoadManager, nameof(IViewLoadManager.ViewLoading), OnViewLoadedManagerLoadingInternal, false) is null)
{
Log.Debug("Failed to use weak events to subscribe to 'ViewLoadManager.ViewLoading', going to subscribe without weak events");
ViewLoadManager.ViewLoading += OnViewLoadedManagerLoadingInternal;
}
if (this.SubscribeToWeakGenericEvent <ViewLoadEventArgs>(ViewLoadManager, nameof(IViewLoadManager.ViewLoaded), OnViewLoadedManagerLoadedInternal, false) is null)
{
Log.Debug("Failed to use weak events to subscribe to 'ViewLoadManager.ViewLoaded', going to subscribe without weak events");
ViewLoadManager.ViewLoaded += OnViewLoadedManagerLoadedInternal;
}
if (this.SubscribeToWeakGenericEvent <ViewLoadEventArgs>(ViewLoadManager, nameof(IViewLoadManager.ViewUnloading), OnViewLoadedManagerUnloadingInternal, false) is null)
{
Log.Debug("Failed to use weak events to subscribe to 'ViewLoadManager.ViewUnloading', going to subscribe without weak events");
ViewLoadManager.ViewUnloading += OnViewLoadedManagerUnloadingInternal;
}
if (this.SubscribeToWeakGenericEvent <ViewLoadEventArgs>(ViewLoadManager, nameof(IViewLoadManager.ViewUnloaded), OnViewLoadedManagerUnloadedInternal, false) is null)
{
Log.Debug("Failed to use weak events to subscribe to 'ViewLoadManager.ViewUnloaded', going to subscribe without weak events");
ViewLoadManager.ViewUnloaded += OnViewLoadedManagerUnloadedInternal;
}
// Required so the ViewLoadManager can handle the rest
targetView.Loaded += (sender, e) => Loaded?.Invoke(this, EventArgs.Empty);
targetView.Unloaded += (sender, e) => Unloaded?.Invoke(this, EventArgs.Empty);
TargetView.DataContextChanged += OnTargetViewDataContextChanged;
Log.Debug("Subscribing to view properties");
// This also subscribes to DataContextChanged, don't double subscribe
var viewPropertiesToSubscribe = DetermineInterestingViewProperties();
foreach (var viewPropertyToSubscribe in viewPropertiesToSubscribe)
{
TargetView.SubscribeToPropertyChanged(viewPropertyToSubscribe, OnTargetViewPropertyChanged);
}
Log.Debug($"Constructed behavior '{GetType().Name}' for '{TargetViewType?.Name}'");
}
/// <summary>
/// Initializes a new instance of the <see cref="Page"/> class.
/// </summary>
/// <remarks>
/// It is not possible to inject view models.
/// </remarks>
public Page()
{
if (Catel.Environment.IsInDesignMode)
{
return;
}
var viewModelType = GetViewModelType();
if (viewModelType == null)
{
Log.Debug("GetViewModelType() returned null, using the ViewModelLocator to resolve the view model");
viewModelType = _viewModelLocator.ResolveViewModel(GetType());
if (viewModelType == null)
{
const string error = "The view model of the view could not be resolved. Use either the GetViewModelType() method or IViewModelLocator";
Log.Error(error);
throw new NotSupportedException(error);
}
}
_logic = new NavigationPageLogic(this, viewModelType);
_logic.TargetControlPropertyChanged += (sender, e) =>
{
#if !NET
// WPF already calls this method automatically
OnPropertyChanged(e.FxEventArgs);
// Do not call this for WPF, will cause problems with ActualWidth and ActualHeight
PropertyChanged.SafeInvoke(this, new PropertyChangedEventArgs(e.PropertyName));
#endif
};
_logic.ViewModelChanged += (sender, e) =>
{
OnViewModelChanged();
ViewModelChanged.SafeInvoke(this, e);
PropertyChanged.SafeInvoke(this, new PropertyChangedEventArgs("ViewModel"));
};
_logic.ViewModelPropertyChanged += (sender, e) =>
{
OnViewModelPropertyChanged(e);
ViewModelPropertyChanged.SafeInvoke(this, e);
};
_logic.DetermineViewModelInstance += (sender, e) =>
{
e.ViewModel = GetViewModelInstance(e.DataContext);
};
_logic.DetermineViewModelType += (sender, e) =>
{
e.ViewModelType = GetViewModelType(e.DataContext);
};
ViewModelChanged.SafeInvoke(this);
Loaded += (sender, e) => OnLoaded(e);
Unloaded += (sender, e) => OnUnloaded(e);
}
public static T ResolveViewModel <T>(this IViewModelLocator vml) => (T)vml?.ResolveViewModel(typeof(T).Name);
/// <summary>
/// Initializes a new instance of the <see cref="PhoneApplicationPage"/> class.
/// </summary>
/// <remarks>
/// It is not possible to inject view models (actually, you can't even
/// pass view models during navigation in Windows Phone 7).
/// </remarks>
public PhoneApplicationPage()
{
if (Catel.Environment.IsInDesignMode)
{
return;
}
var viewModelType = GetViewModelType();
if (viewModelType == null)
{
Log.Debug("GetViewModelType() returned null, using the ViewModelLocator to resolve the view model");
viewModelType = _viewModelLocator.ResolveViewModel(GetType());
if (viewModelType == null)
{
const string error = "The view model of the view could not be resolved. Use either the GetViewModelType() method or IViewModelLocator";
Log.Error(error);
throw new NotSupportedException(error);
}
}
_logic = new PhoneApplicationPageLogic(this, viewModelType);
_logic.TargetControlPropertyChanged += (sender, e) =>
{
OnPropertyChanged(e.FxEventArgs);
PropertyChanged.SafeInvoke(this, new PropertyChangedEventArgs(e.PropertyName));
};
_logic.ViewModelChanged += (sender, e) =>
{
OnViewModelChanged();
ViewModelChanged.SafeInvoke(this, e);
PropertyChanged.SafeInvoke(this, new PropertyChangedEventArgs("ViewModel"));
};
_logic.ViewModelPropertyChanged += (sender, e) =>
{
OnViewModelPropertyChanged(e);
ViewModelPropertyChanged.SafeInvoke(this, e);
};
_logic.DetermineViewModelInstance += (sender, e) =>
{
e.ViewModel = GetViewModelInstance(e.DataContext);
};
_logic.DetermineViewModelType += (sender, e) =>
{
e.ViewModelType = GetViewModelType(e.DataContext);
};
_logic.ViewLoading += (sender, e) => ViewLoading.SafeInvoke(this);
_logic.ViewLoaded += (sender, e) => ViewLoaded.SafeInvoke(this);
_logic.ViewUnloading += (sender, e) => ViewUnloading.SafeInvoke(this);
_logic.ViewUnloaded += (sender, e) => ViewUnloaded.SafeInvoke(this);
_logic.Tombstoning += (sender, e) => OnTombstoning();
_logic.Tombstoned += (sender, e) => OnTombstoned();
_logic.RecoveringFromTombstoning += (sender, e) => OnRecoveringFromTombstoning();
_logic.RecoveredFromTombstoning += (sender, e) => OnRecoveredFromTombstoning();
ViewModelChanged.SafeInvoke(this);
Loaded += (sender, e) => OnLoaded(e);
Unloaded += (sender, e) => OnUnloaded(e);
}
/// <summary>
/// Initializes a new instance of the <see cref="UserControl"/> class.
/// </summary>
/// <param name="viewModel">The view model.</param>
public UserControl(IViewModel viewModel)
{
if (Catel.Environment.IsInDesignMode)
{
return;
}
var viewModelType = (viewModel != null) ? viewModel.GetType() : GetViewModelType();
if (viewModelType == null)
{
Log.Debug("GetViewModelType() returned null, using the ViewModelLocator to resolve the view model");
viewModelType = ViewModelLocator.ResolveViewModel(GetType());
if (viewModelType == null)
{
const string error = "The view model of the view could not be resolved. Use either the GetViewModelType() method or IViewModelLocator";
Log.Error(error);
throw new NotSupportedException(error);
}
}
_logic = new UserControlLogic(this, viewModelType, viewModel);
_logic.TargetControlPropertyChanged += (sender, e) =>
{
#if !NET
// WPF already calls this method automatically
OnPropertyChanged(e.FxEventArgs);
PropertyChanged.SafeInvoke(this, new PropertyChangedEventArgs(e.PropertyName));
#else
// Do not call this for ActualWidth and ActualHeight WPF, will cause problems with NET 40
// on systems where NET45 is *not* installed
if (!string.Equals(e.PropertyName, "ActualWidth", StringComparison.InvariantCulture) &&
!string.Equals(e.PropertyName, "ActualHeight", StringComparison.InvariantCulture))
{
PropertyChanged.SafeInvoke(this, new PropertyChangedEventArgs(e.PropertyName));
}
#endif
};
_logic.ViewModelChanged += (sender, e) =>
{
OnViewModelChanged();
ViewModelChanged.SafeInvoke(this, e);
PropertyChanged.SafeInvoke(this, new PropertyChangedEventArgs("ViewModel"));
};
_logic.ViewModelPropertyChanged += (sender, e) =>
{
OnViewModelPropertyChanged(e);
ViewModelPropertyChanged.SafeInvoke(this, e);
};
_logic.DetermineViewModelInstance += (sender, e) =>
{
e.ViewModel = GetViewModelInstance(e.DataContext);
};
_logic.DetermineViewModelType += (sender, e) =>
{
e.ViewModelType = GetViewModelType(e.DataContext);
};
_logic.ViewLoading += (sender, e) => ViewLoading.SafeInvoke(this);
_logic.ViewLoaded += (sender, e) => ViewLoaded.SafeInvoke(this);
_logic.ViewUnloading += (sender, e) => ViewUnloading.SafeInvoke(this);
_logic.ViewUnloaded += (sender, e) => ViewUnloaded.SafeInvoke(this);
_logic.ViewModelClosed += OnViewModelClosed;
Loaded += (sender, e) => OnLoaded(e);
Unloaded += (sender, e) => OnUnloaded(e);
}
/// <summary>
/// Initializes a new instance of the <see cref="LogicBase"/> class.
/// </summary>
/// <param name="targetView">The target control.</param>
/// <param name="viewModelType">Type of the view model.</param>
/// <param name="viewModel">The view model.</param>
/// <exception cref="ArgumentNullException">The <paramref name="targetView"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentNullException">The <paramref name="viewModelType"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentNullException">The <paramref name="viewModelType"/> does not implement interface <see cref="IViewModel"/>.</exception>
protected LogicBase(IView targetView, Type viewModelType = null, IViewModel viewModel = null)
{
Argument.IsNotNull("targetView", targetView);
if (viewModelType == null)
{
viewModelType = (viewModel != null) ? viewModel.GetType() : _viewModelLocator.ResolveViewModel(targetView.GetType());
if (viewModelType == null)
{
var error = string.Format("The view model of the view '{0}' could not be resolved. Make sure to customize the IViewModelLocator or register the view and view model manually", targetView.GetType().GetSafeFullName());
Log.Error(error);
throw new NotSupportedException(error);
}
}
UniqueIdentifier = UniqueIdentifierHelper.GetUniqueIdentifier <LogicBase>();
Log.Debug("Constructing behavior '{0}' for '{1}' with unique id '{2}'", GetType().Name, targetView.GetType().Name, UniqueIdentifier);
TargetView = targetView;
ViewModelType = viewModelType;
ViewModel = viewModel;
#if SL5
Catel.Windows.FrameworkElementExtensions.FixUILanguageBug((System.Windows.FrameworkElement)TargetView);
#endif
ViewModelBehavior = (viewModel != null) ? LogicViewModelBehavior.Injected : LogicViewModelBehavior.Dynamic;
if (ViewModel != null)
{
SetDataContext(ViewModel);
}
// Very impoortant to exit here in design mode
if (CatelEnvironment.IsInDesignMode)
{
return;
}
Log.Debug("Subscribing to view events");
ViewLoadManager.AddView(this);
this.SubscribeToWeakGenericEvent <ViewLoadEventArgs>(ViewLoadManager, "ViewLoading", OnViewLoadedManagerLoading);
this.SubscribeToWeakGenericEvent <ViewLoadEventArgs>(ViewLoadManager, "ViewLoaded", OnViewLoadedManagerLoaded);
this.SubscribeToWeakGenericEvent <ViewLoadEventArgs>(ViewLoadManager, "ViewUnloading", OnViewLoadedManagerUnloading);
this.SubscribeToWeakGenericEvent <ViewLoadEventArgs>(ViewLoadManager, "ViewUnloaded", OnViewLoadedManagerUnloaded);
// Required so the ViewLoadManager can handle the rest
targetView.Loaded += (sender, e) => Loaded.SafeInvoke(this);
targetView.Unloaded += (sender, e) => Unloaded.SafeInvoke(this);
TargetView.DataContextChanged += OnTargetViewDataContextChanged;
Log.Debug("Subscribing to view properties");
// This also subscribes to DataContextChanged, don't double subscribe
var viewPropertiesToSubscribe = DetermineInterestingViewProperties();
foreach (var viewPropertyToSubscribe in viewPropertiesToSubscribe)
{
TargetView.SubscribeToPropertyChanged(viewPropertyToSubscribe, OnTargetViewPropertyChanged);
}
Log.Debug("Constructed behavior '{0}' for '{1}'", GetType().Name, TargetView.GetType().Name);
}
/// <summary>
/// Resolves a view model type by the view and the registered <see cref="ILocator.NamingConventions" />.
/// </summary>
/// <typeparam name="TView">The type of the view.</typeparam>
/// <param name="viewModelLocator">The view model locator.</param>
/// <returns>The resolved view model or <c>null</c> if the view model could not be resolved.</returns>
/// <exception cref="ArgumentNullException">The <paramref name="viewModelLocator" /> is <c>null</c>.</exception>
/// <remarks>Keep in mind that all results are cached. The cache itself is not automatically cleared when the
/// <see cref="ILocator.NamingConventions" /> are changed. If the <see cref="ILocator.NamingConventions" /> are changed,
/// the cache must be cleared manually.</remarks>
public static Type ResolveViewModel <TView>(this IViewModelLocator viewModelLocator)
{
Argument.IsNotNull("viewModelLocator", viewModelLocator);
return(viewModelLocator.ResolveViewModel(typeof(TView)));
}
