/// <summary>
/// Called when the fragment is paused.
/// </summary>
public override void OnPause()
{
base.OnPause();
Unloaded.SafeInvoke(this);
UninitializeBindingContext();
}
/// <summary>
/// Called as part of the activity lifecycle when an activity is going into
/// the background, but has not (yet) been killed.
/// </summary>
protected override void OnPause()
{
base.OnPause();
// Note: call *after* base so NavigationAdapter always gets called
Unloaded.SafeInvoke(this);
UninitializeBindingContext();
}
public override void ViewDidDisappear(bool animated)
{
base.ViewDidDisappear(animated);
// Note: call *after* base so NavigationAdapter always gets called
Unloaded.SafeInvoke(this);
UninitializeBindingContext();
}
/// <summary>
/// Called when the framework element is unloaded.
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The <see cref="EventArgs"/> instance containing the event data.
/// </param>
public void OnUnloaded(object sender, EventArgs e)
{
if (!IsLoaded)
{
return;
}
IsLoaded = false;
Unloaded.SafeInvoke(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);
if (viewModelType == null)
{
viewModelType = (viewModel != null) ? viewModel.GetType() : _viewModelLocator.ResolveViewModel(targetView.GetType());
if (viewModelType == null)
{
throw Log.ErrorAndCreateException <NotSupportedException>("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", TargetViewType?.Name);
}
}
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, "ViewLoading", OnViewLoadedManagerLoadingInternal, false) == 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, "ViewLoaded", OnViewLoadedManagerLoadedInternal, false) == 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, "ViewUnloading", OnViewLoadedManagerUnloadingInternal, false) == 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, "ViewUnloaded", OnViewLoadedManagerUnloadedInternal, false) == 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.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 '{GetType().Name}' for '{TargetViewType?.Name}'");
}
/// <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);
}
