C# Class Catel.MVVM.Providers.LogicBase

Base implementation of the behaviors, which defines all the different possible situations a behavior must implement / support to be a valid MVVM provider behavior.

Inheritance: ObservableObject, IViewLoadState, IUniqueIdentifyable

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Protected Properties

Property	Type	Description
ViewLoadManager	IViewLoadManager
_lockObject	object

Private Properties

Property	Type	Description
ConstructViewModelUsingArgumentOrDefaultConstructor	IViewModel
DetermineInterestingViewProperties	List
InitializeViewModelAsync	Task
LogicBase	System
OnTargetViewLoadedInternal	void
OnTargetViewLoadingInternal	void
OnTargetViewPropertyChangedInternal	void
OnTargetViewUnloadedInternal	void
OnTargetViewUnloadingInternal	void

Public Methods

Method	Description
CancelAndCloseViewModelAsync ( ) : Task	Cancels and closes the view model.
CancelViewModelAsync ( ) : Task	Cancels the view model.
CloseViewModelAsync ( bool result ) : Task	Closes the view model.
OnTargetViewDataContextChanged ( object sender, DataContextChangedEventArgs e ) : void	Called when the `DataContext` property of the TargetView has changed.
OnTargetViewLoadedAsync ( object sender, EventArgs e ) : Task	Called when the TargetView has just been loaded. The base implementation will try to create a view model based on the current DataContext and set it as the DataContext of the TargetView. To create custom logic for view model creation, override this method and do not call the base.
OnTargetViewPropertyChanged ( object sender, PropertyChangedEventArgs e ) : void	Called when a property on the TargetView has changed.
OnTargetViewUnloadedAsync ( object sender, EventArgs e ) : Task	Called when the TargetView has just been unloaded.
OnViewLoadedManagerLoadedInternal ( object sender, ViewLoadEventArgs e ) : void	Called when the view manager is loaded. This method is public because the view loaded manager must be subscribed to as a weak event.
OnViewLoadedManagerLoadingInternal ( object sender, ViewLoadEventArgs e ) : void	Called when the view manager is unloading. This method is public because the view loaded manager must be subscribed to as a weak event.
OnViewLoadedManagerUnloadedInternal ( object sender, ViewLoadEventArgs e ) : void	Called when the view manager is unloaded. This method is public because the view loaded manager must be subscribed to as a weak event.
OnViewLoadedManagerUnloadingInternal ( object sender, ViewLoadEventArgs e ) : void	Called when the view manager is unloading. This method is public because the view loaded manager must be subscribed to as a weak event.
OnViewModelCanceledAsync ( object sender, EventArgs e ) : Task	Called when the ViewModel has been saved.
OnViewModelClosedAsync ( object sender, ViewModelClosedEventArgs e ) : Task	Called when the ViewModel has been closed.
OnViewModelPropertyChanged ( object sender, PropertyChangedEventArgs e ) : void	Called when a property on the ViewModel has changed.
OnViewModelSavedAsync ( object sender, EventArgs e ) : Task	Called when the ViewModel has been saved.
SaveAndCloseViewModelAsync ( ) : Task	Saves and closes the view model. If the saving fails, the view model is not closed.
SaveViewModelAsync ( ) : Task	Saves the view model.
ValidateViewModel ( ) : bool	Validates the view model.

Protected Methods

Method	Description
CompleteViewModelClosingAsync ( ) : Task	Awaits until the closing of the view model is completed.
ConstructViewModelUsingArgumentOrDefaultConstructor ( object injectionObject ) : IViewModel	Tries to construct the view model using the argument. If that fails, it will try to use the default constructor of the view model. If that is not available, `null` is returned.
CreateViewModelByUsingDataContextOrConstructor ( ) : IViewModel	Creates a view model by using data context or, if that is not possible, the constructor of the view model.
IsCurrentDataContext ( DataContextChangedEventArgs e ) : bool	Gets a value indicating whether the specified arguments represent the current data context.
LogicBase ( IView targetView, Type viewModelType = null, IViewModel viewModel = null ) : System	Initializes a new instance of the LogicBase class.
OnViewLoadedManagerLoaded ( object sender, ViewLoadEventArgs e ) : void	Called when the view manager is loaded.
OnViewLoadedManagerLoading ( object sender, ViewLoadEventArgs e ) : void	Called when the view manager is unloading.
OnViewLoadedManagerUnloaded ( object sender, ViewLoadEventArgs e ) : void	Called when the view manager is unloaded.
OnViewLoadedManagerUnloading ( object sender, ViewLoadEventArgs e ) : void	Called when the view manager is unloading.
OnViewModelChanged ( ) : void	Called when the ViewModel property has just been changed.
OnViewModelChanging ( ) : void	Called when the ViewModel property is about to change.
SetDataContext ( object newDataContext ) : void	Sets the data context of the target control. This method is abstract because the real logic implementation knows how to set the data context (for example, by using an additional data context grid).

Private Methods

Method	Description
ConstructViewModelUsingArgumentOrDefaultConstructor ( object injectionObject, Type viewModelType ) : IViewModel	Tries to construct the view model using the argument. If that fails, it will try to use the default constructor of the view model. If that is not available, `null` is returned.
DetermineInterestingViewProperties ( ) : List	Determines the interesting view properties.
InitializeViewModelAsync ( ) : Task
LogicBase ( ) : System	Initializes static members of the LogicBase class.
OnTargetViewLoadedInternal ( object sender, EventArgs e ) : void	Called when the TargetView has just been loaded. This method will call the OnTargetViewLoadedAsync which can be overriden for custom behavior. This method is required to protect from duplicate loaded events.
OnTargetViewLoadingInternal ( object sender, EventArgs e ) : void	Called when the TargetView is about to be loaded.
OnTargetViewPropertyChangedInternal ( object sender, PropertyChangedEventArgs e ) : void	Called when a property on the TargetView has changed.
OnTargetViewUnloadedInternal ( object sender, EventArgs e ) : void	Called when the TargetView has just been unloaded. This method will call the OnTargetViewUnloadedAsync which can be overriden for custom behavior. This method is required to protect from duplicate unloaded events.
OnTargetViewUnloadingInternal ( object sender, EventArgs e ) : void	Called when the TargetView is about to be unloaded.

Method Details

CancelAndCloseViewModelAsync() public method

Cancels and closes the view model.

public CancelAndCloseViewModelAsync ( ) : Task
return	Task

CancelViewModelAsync() public method

Cancels the view model.

public CancelViewModelAsync ( ) : Task
return	Task

CloseViewModelAsync() public method

Closes the view model.

public CloseViewModelAsync ( bool result ) : Task
result	bool
return	Task

CompleteViewModelClosingAsync() protected method

Awaits until the closing of the view model is completed.

protected CompleteViewModelClosingAsync ( ) : Task
return	Task

ConstructViewModelUsingArgumentOrDefaultConstructor() protected method

Tries to construct the view model using the argument. If that fails, it will try to use the default constructor of the view model. If that is not available, null is returned.

protected ConstructViewModelUsingArgumentOrDefaultConstructor ( object injectionObject ) : IViewModel
injectionObject	object	The object that is injected into the view model constructor.
return	IViewModel

CreateViewModelByUsingDataContextOrConstructor() protected method

Creates a view model by using data context or, if that is not possible, the constructor of the view model.

protected CreateViewModelByUsingDataContextOrConstructor ( ) : IViewModel
return	IViewModel

IsCurrentDataContext() protected method

Gets a value indicating whether the specified arguments represent the current data context.

protected IsCurrentDataContext ( DataContextChangedEventArgs e ) : bool
e	DataContextChangedEventArgs
return	bool

LogicBase() protected method

Initializes a new instance of the LogicBase class.

The is null. The is null. The does not implement interface .

protected LogicBase ( IView targetView, Type viewModelType = null, IViewModel viewModel = null ) : System
targetView	IView	The target control.
viewModelType	System.Type	Type of the view model.
viewModel	IViewModel	The view model.
return	System

OnTargetViewDataContextChanged() public method

Called when the DataContext property of the TargetView has changed.

public OnTargetViewDataContextChanged ( object sender, DataContextChangedEventArgs e ) : void
sender	object	The sender.
e	DataContextChangedEventArgs	The instance containing the event data.
return	void

OnTargetViewLoadedAsync() public method

Called when the TargetView has just been loaded. The base implementation will try to create a view model based on the current DataContext and set it as the DataContext of the TargetView. To create custom logic for view model creation, override this method and do not call the base.

public OnTargetViewLoadedAsync ( object sender, EventArgs e ) : Task
sender	object	The sender.
e	System.EventArgs	The instance containing the event data.
return	Task

OnTargetViewPropertyChanged() public method

Called when a property on the TargetView has changed.

public OnTargetViewPropertyChanged ( object sender, PropertyChangedEventArgs e ) : void
sender	object	The sender.
e	System.ComponentModel.PropertyChangedEventArgs	The instance containing the event data.
return	void

OnTargetViewUnloadedAsync() public method

Called when the TargetView has just been unloaded.

public OnTargetViewUnloadedAsync ( object sender, EventArgs e ) : Task
sender	object	The sender.
e	System.EventArgs	The instance containing the event data.
return	Task

OnViewLoadedManagerLoaded() protected method

Called when the view manager is loaded.

protected OnViewLoadedManagerLoaded ( object sender, ViewLoadEventArgs e ) : void
sender	object	The sender.
e	ViewLoadEventArgs	The instance containing the event data.
return	void

OnViewLoadedManagerLoadedInternal() public method

Called when the view manager is loaded. This method is public because the view loaded manager must be subscribed to as a weak event.

public OnViewLoadedManagerLoadedInternal ( object sender, ViewLoadEventArgs e ) : void
sender	object	The sender.
e	ViewLoadEventArgs	The instance containing the event data.
return	void

OnViewLoadedManagerLoading() protected method

Called when the view manager is unloading.

protected OnViewLoadedManagerLoading ( object sender, ViewLoadEventArgs e ) : void
sender	object	The sender.
e	ViewLoadEventArgs	The instance containing the event data.
return	void

OnViewLoadedManagerLoadingInternal() public method

Called when the view manager is unloading. This method is public because the view loaded manager must be subscribed to as a weak event.

public OnViewLoadedManagerLoadingInternal ( object sender, ViewLoadEventArgs e ) : void
sender	object	The sender.
e	ViewLoadEventArgs	The instance containing the event data.
return	void

OnViewLoadedManagerUnloaded() protected method

Called when the view manager is unloaded.

protected OnViewLoadedManagerUnloaded ( object sender, ViewLoadEventArgs e ) : void
sender	object	The sender.
e	ViewLoadEventArgs	The instance containing the event data.
return	void

OnViewLoadedManagerUnloadedInternal() public method

Called when the view manager is unloaded. This method is public because the view loaded manager must be subscribed to as a weak event.

public OnViewLoadedManagerUnloadedInternal ( object sender, ViewLoadEventArgs e ) : void
sender	object	The sender.
e	ViewLoadEventArgs	The instance containing the event data.
return	void

OnViewLoadedManagerUnloading() protected method

Called when the view manager is unloading.

protected OnViewLoadedManagerUnloading ( object sender, ViewLoadEventArgs e ) : void
sender	object	The sender.
e	ViewLoadEventArgs	The instance containing the event data.
return	void

OnViewLoadedManagerUnloadingInternal() public method

Called when the view manager is unloading. This method is public because the view loaded manager must be subscribed to as a weak event.

public OnViewLoadedManagerUnloadingInternal ( object sender, ViewLoadEventArgs e ) : void
sender	object	The sender.
e	ViewLoadEventArgs	The instance containing the event data.
return	void

OnViewModelCanceledAsync() public method

Called when the ViewModel has been saved.

public OnViewModelCanceledAsync ( object sender, EventArgs e ) : Task
sender	object	The sender.
e	System.EventArgs	The instance containing the event data.
return	Task

OnViewModelChanged() protected method

Called when the ViewModel property has just been changed.

protected OnViewModelChanged ( ) : void
return	void

OnViewModelChanging() protected method

Called when the ViewModel property is about to change.

protected OnViewModelChanging ( ) : void
return	void

OnViewModelClosedAsync() public method

Called when the ViewModel has been closed.

public OnViewModelClosedAsync ( object sender, ViewModelClosedEventArgs e ) : Task
sender	object	The sender.
e	ViewModelClosedEventArgs	The instance containing the event data.
return	Task

OnViewModelPropertyChanged() public method

Called when a property on the ViewModel has changed.

public OnViewModelPropertyChanged ( object sender, PropertyChangedEventArgs e ) : void
sender	object	The sender.
e	System.ComponentModel.PropertyChangedEventArgs	The instance containing the event data.
return	void

OnViewModelSavedAsync() public method

Called when the ViewModel has been saved.

public OnViewModelSavedAsync ( object sender, EventArgs e ) : Task
sender	object	The sender.
e	System.EventArgs	The instance containing the event data.
return	Task

SaveAndCloseViewModelAsync() public method

Saves and closes the view model. If the saving fails, the view model is not closed.

public SaveAndCloseViewModelAsync ( ) : Task
return	Task

SaveViewModelAsync() public method

Saves the view model.

public SaveViewModelAsync ( ) : Task
return	Task

SetDataContext() protected abstract method

Sets the data context of the target control. This method is abstract because the real logic implementation knows how to set the data context (for example, by using an additional data context grid).

protected abstract SetDataContext ( object newDataContext ) : void
newDataContext	object	The new data context.
return	void

ValidateViewModel() public method

Validates the view model.

public ValidateViewModel ( ) : bool
return	bool

Property Details

ViewLoadManager protected_oe static_oe property

The view loaded manager.

protected static IViewLoadManager ViewLoadManager
return	IViewLoadManager

_lockObject protected_oe property

The lock object.

protected object _lockObject
return	object