public IDisposable AddClassHandler(
Type targetType,
EventHandler <RoutedEventArgs> handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false)
{
return(Raised.Subscribe(args =>
{
var sender = args.Item1;
var e = args.Item2;
if (targetType.GetTypeInfo().IsAssignableFrom(sender.GetType().GetTypeInfo()) &&
((e.Route == RoutingStrategies.Direct) || (e.Route & routes) != 0) &&
(!e.Handled || handledEventsToo))
{
try
{
handler.DynamicInvoke(sender, e);
}
catch (TargetInvocationException ex)
{
// Unwrap the inner exception.
ExceptionDispatchInfo.Capture(ex.InnerException).Throw();
}
}
}));
}
/// <summary>
/// Adds a handler for the specified routed event.
/// </summary>
/// <param name="routedEvent">The routed event.</param>
/// <param name="handler">The handler.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">Whether handled events should also be listened for.</param>
/// <returns>A disposable that terminates the event subscription.</returns>
public IDisposable AddHandler(
RoutedEvent routedEvent,
Delegate handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false)
{
Contract.Requires <ArgumentNullException>(routedEvent != null);
Contract.Requires <ArgumentNullException>(handler != null);
List <EventSubscription> subscriptions;
if (!_eventHandlers.TryGetValue(routedEvent, out subscriptions))
{
subscriptions = new List <EventSubscription>();
_eventHandlers.Add(routedEvent, subscriptions);
}
var sub = new EventSubscription
{
Handler = handler,
Routes = routes,
AlsoIfHandled = handledEventsToo,
};
subscriptions.Add(sub);
return(Disposable.Create(() => subscriptions.Remove(sub)));
}
/// <summary>
/// Adds a handler for the specified routed event.
/// </summary>
/// <typeparam name="TEventArgs">The type of the event's args.</typeparam>
/// <param name="routedEvent">The routed event.</param>
/// <param name="handler">The handler.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">Whether handled events should also be listened for.</param>
/// <returns>A disposable that terminates the event subscription.</returns>
public IDisposable AddHandler <TEventArgs>(
RoutedEvent <TEventArgs> routedEvent,
EventHandler <TEventArgs> handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false) where TEventArgs : RoutedEventArgs
{
return(AddHandler(routedEvent, (Delegate)handler, routes, handledEventsToo));
}
/// <summary>
/// Adds a handler for the specified routed event.
/// </summary>
/// <typeparam name="TEventArgs">The type of the event's args.</typeparam>
/// <param name="routedEvent">The routed event.</param>
/// <param name="handler">The handler.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">Whether handled events should also be listened for.</param>
public void AddHandler <TEventArgs>(
RoutedEvent <TEventArgs> routedEvent,
EventHandler <TEventArgs> handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false) where TEventArgs : RoutedEventArgs
{
routedEvent = routedEvent ?? throw new ArgumentNullException(nameof(routedEvent));
handler = handler ?? throw new ArgumentNullException(nameof(handler));
public EventChainLink(object handler, bool handled, RoutingStrategies route)
{
Contract.Requires <ArgumentNullException>(handler != null);
this.Handler = handler;
this.Handled = handled;
this.Route = route;
}
/// <summary>
/// Registers a RoutedEvent with the given details
/// </summary>
/// <typeparam name="TOwner"></typeparam>
/// <typeparam name="TEventArgs"></typeparam>
/// <param name="name"></param>
/// <param name="routingStrategy"></param>
/// <returns></returns>
public static RoutedEvent <TEventArgs> Register <TOwner, TEventArgs>(
string name,
RoutingStrategies routingStrategy)
where TEventArgs : RoutedEventArgs
{
Contract.Requires <ArgumentNullException>(name != null);
return(new RoutedEvent <TEventArgs>(name, routingStrategy, typeof(TOwner)));
}
public static RoutedEvent <TEventArgs> Register <TEventArgs>(
string name,
RoutingStrategies routingStrategy,
Type ownerType)
where TEventArgs : RoutedEventArgs
{
Contract.Requires <NullReferenceException>(name != null);
return(new RoutedEvent <TEventArgs>(name, routingStrategy, ownerType));
}
/// <summary>
/// Adds a handler for the specified routed event and returns a disposable that can terminate the event subscription.
/// </summary>
/// <typeparam name="TEventArgs">The type of the event's args.</typeparam>
/// <param name="o">Target for adding given event handler.</param>
/// <param name="routedEvent">The routed event.</param>
/// <param name="handler">The handler.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">Whether handled events should also be listened for.</param>
/// <returns>A disposable that terminates the event subscription.</returns>
public static IDisposable AddDisposableHandler <TEventArgs>(this IInteractive o, RoutedEvent <TEventArgs> routedEvent,
EventHandler <TEventArgs> handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false) where TEventArgs : RoutedEventArgs
{
o.AddHandler(routedEvent, handler, routes, handledEventsToo);
return(Disposable.Create(
(instance: o, handler, routedEvent),
state => state.instance.RemoveHandler(state.routedEvent, state.handler)));
}
/// <summary>
/// Adds a handler to the route.
/// </summary>
/// <param name="target">The target on which the event should be raised.</param>
/// <param name="handler">The handler for the event.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">
/// If true the handler will be raised even when the routed event is marked as handled.
/// </param>
/// <param name="adapter">
/// An optional adapter which if supplied, will be called with <paramref name="handler"/>
/// and the parameters for the event. This adapter can be used to avoid calling
/// `DynamicInvoke` on the handler.
/// </param>
public void Add(
IInteractive target,
Delegate handler,
RoutingStrategies routes,
bool handledEventsToo = false,
Action <Delegate, object, RoutedEventArgs>?adapter = null)
{
target = target ?? throw new ArgumentNullException(nameof(target));
handler = handler ?? throw new ArgumentNullException(nameof(handler));
_route ??= new PooledList <RouteItem>(16);
_route.Add(new RouteItem(target, handler, adapter, routes, handledEventsToo));
}
public RouteItem(
IInteractive target,
Delegate?handler,
Action <Delegate, object, RoutedEventArgs>?adapter,
RoutingStrategies routes,
bool handledEventsToo)
{
Target = target;
Handler = handler;
Adapter = adapter;
Routes = routes;
HandledEventsToo = handledEventsToo;
}
/// <summary>
/// Gets an observable for a <see cref="RoutedEvent{TEventArgs}"/>.
/// </summary>
/// <param name="o">The object to listen for events on.</param>
/// <param name="routedEvent">The routed event.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">Whether handled events should also be listened for.</param>
/// <returns>
/// An observable which fires each time the event is raised.
/// </returns>
public static IObservable <TEventArgs> GetObservable <TEventArgs>(
this IInteractive o,
RoutedEvent <TEventArgs> routedEvent,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false)
where TEventArgs : RoutedEventArgs
{
return(Observable.Create <TEventArgs>(x => o.AddHandler(
routedEvent,
(_, e) => x.OnNext(e),
routes,
handledEventsToo)));
}
public static RoutedEvent <TEventArgs> Register <TEventArgs>(
string name,
RoutingStrategies routingStrategy,
Type ownerType)
where TEventArgs : RoutedEventArgs
{
Contract.Requires <ArgumentNullException>(name != null);
var routedEvent = new RoutedEvent <TEventArgs>(name, routingStrategy, ownerType);
RoutedEventRegistry.Instance.Register(ownerType, routedEvent);
return(routedEvent);
}
/// <summary>
/// Adds a handler for the specified routed event.
/// </summary>
/// <param name="routedEvent">The routed event.</param>
/// <param name="handler">The handler.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">Whether handled events should also be listened for.</param>
public void AddHandler(
RoutedEvent routedEvent,
Delegate handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false)
{
routedEvent = routedEvent ?? throw new ArgumentNullException(nameof(routedEvent));
handler = handler ?? throw new ArgumentNullException(nameof(handler));
var subscription = new EventSubscription(handler, routes, handledEventsToo);
AddEventSubscription(routedEvent, subscription);
}
public IDisposable AddClassHandler <TTarget>(
Action <TTarget, TEventArgs> handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false) where TTarget : class, IInteractive
{
void Adapter(object?sender, RoutedEventArgs e)
{
if (sender is TTarget target && e is TEventArgs args)
{
handler(target, args);
}
}
return(AddClassHandler(typeof(TTarget), Adapter, routes, handledEventsToo));
}
public RoutedEvent(
string name,
RoutingStrategies routingStrategies,
Type eventArgsType,
Type ownerType)
{
Contract.Requires <ArgumentNullException>(name != null);
Contract.Requires <ArgumentNullException>(eventArgsType != null);
Contract.Requires <ArgumentNullException>(ownerType != null);
Contract.Requires <InvalidCastException>(typeof(RoutedEventArgs).GetTypeInfo().IsAssignableFrom(eventArgsType.GetTypeInfo()));
EventArgsType = eventArgsType;
Name = name;
OwnerType = ownerType;
RoutingStrategies = routingStrategies;
}
/// <summary>
/// Gets an observable for a <see cref="RoutedEvent{TEventArgs}"/>.
/// </summary>
/// <param name="o">The object to listen for events on.</param>
/// <param name="routedEvent">The routed event.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">Whether handled events should also be listened for.</param>
/// <returns>
/// An observable which fires each time the event is raised.
/// </returns>
public static IObservable <TEventArgs> GetObservable <TEventArgs>(
this IInteractive o,
RoutedEvent <TEventArgs> routedEvent,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false)
where TEventArgs : RoutedEventArgs
{
o = o ?? throw new ArgumentNullException(nameof(o));
routedEvent = routedEvent ?? throw new ArgumentNullException(nameof(routedEvent));
return(Observable.Create <TEventArgs>(x => o.AddDisposableHandler(
routedEvent,
(_, e) => x.OnNext(e),
routes,
handledEventsToo)));
}
/// <summary>
/// Adds a handler for the specified routed event.
/// </summary>
/// <param name="routedEvent">The routed event.</param>
/// <param name="handler">The handler.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">Whether handled events should also be listened for.</param>
/// <returns>A disposable that terminates the event subscription.</returns>
public IDisposable AddHandler(
RoutedEvent routedEvent,
Delegate handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false)
{
Contract.Requires <ArgumentNullException>(routedEvent != null);
Contract.Requires <ArgumentNullException>(handler != null);
var subscription = new EventSubscription
{
Handler = handler,
Routes = routes,
AlsoIfHandled = handledEventsToo,
};
return(AddEventSubscription(routedEvent, subscription));
}
public IDisposable AddClassHandler <TTarget>(
Func <TTarget, Action <TEventArgs> > handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false)
where TTarget : class, IInteractive
{
EventHandler <RoutedEventArgs> adapter = (sender, e) =>
{
var target = sender as TTarget;
var args = e as TEventArgs;
if (target != null && args != null)
{
handler(target)(args);
}
};
return(AddClassHandler(typeof(TTarget), adapter, routes, handledEventsToo));
}
private TestInteractive CreateTree(
RoutedEvent ev,
EventHandler <RoutedEventArgs> handler,
RoutingStrategies handlerRoutes,
bool handledEventsToo = false)
{
TestInteractive target;
var tree = new TestInteractive
{
Name = "1",
Children = new[]
{
new TestInteractive
{
Name = "2a",
},
(target = new TestInteractive
{
Name = "2b",
Children = new[]
{
new TestInteractive
{
Name = "3",
},
},
}),
}
};
if (handler != null)
{
foreach (var i in tree.GetSelfAndVisualDescendents().Cast <Interactive>())
{
i.AddHandler(ev, handler, handlerRoutes, handledEventsToo);
}
}
return(target);
}
/// <summary>
/// Adds a handler for the specified routed event.
/// </summary>
/// <typeparam name="TEventArgs">The type of the event's args.</typeparam>
/// <param name="routedEvent">The routed event.</param>
/// <param name="handler">The handler.</param>
/// <param name="routes">The routing strategies to listen to.</param>
/// <param name="handledEventsToo">Whether handled events should also be listened for.</param>
/// <returns>A disposable that terminates the event subscription.</returns>
public IDisposable AddHandler <TEventArgs>(
RoutedEvent <TEventArgs> routedEvent,
EventHandler <TEventArgs> handler,
RoutingStrategies routes = RoutingStrategies.Direct | RoutingStrategies.Bubble,
bool handledEventsToo = false) where TEventArgs : RoutedEventArgs
{
Contract.Requires <ArgumentNullException>(routedEvent != null);
Contract.Requires <ArgumentNullException>(handler != null);
// EventHandler delegate is not covariant, this forces us to create small wrapper
// that will cast our type erased instance and invoke it.
Type eventArgsType = routedEvent.EventArgsType;
if (!s_invokeHandlerCache.TryGetValue(eventArgsType, out var invokeAdapter))
{
void InvokeAdapter(Delegate baseHandler, object sender, RoutedEventArgs args)
{
var typedHandler = (EventHandler <TEventArgs>)baseHandler;
var typedArgs = (TEventArgs)args;
typedHandler(sender, typedArgs);
}
invokeAdapter = InvokeAdapter;
s_invokeHandlerCache.Add(eventArgsType, invokeAdapter);
}
var subscription = new EventSubscription
{
InvokeAdapter = invokeAdapter,
Handler = handler,
Routes = routes,
AlsoIfHandled = handledEventsToo,
};
return(AddEventSubscription(routedEvent, subscription));
}
public void AddToChain(object handler, bool handled, RoutingStrategies route)
{
AddToChain(new EventChainLink(handler, handled, route));
}
public MetadataTestClass(string name, RoutingStrategies routingStrategies, Type eventArgsType, Type ownerType) : base(name, routingStrategies, eventArgsType, ownerType)
{
}
static public void Register(this Control item, RoutedEvent routed_event, FunctionSyncro function, RoutingStrategies routes = RoutingStrategies.Bubble)
{
item.AddHandler(routed_event, function.GetRoutedEventHandler <RoutedEventArgs>(), routes);
}
public RoutedEvent(string name, RoutingStrategies routingStrategies, Type ownerType)
: base(name, routingStrategies, typeof(TEventArgs), ownerType)
{
}
public void AddClassHandler(Type type, EventHandler <RoutedEventArgs> handler, RoutingStrategies routes)
{
_subscriptions.Add(new ClassEventSubscription
{
TargetType = type,
Handler = handler,
Routes = routes,
});
}
public RoutedEvent(string name, RoutingStrategies routingStrategies, Type ownerType)
: base(name, routingStrategies, typeof(TEventArgs), ownerType)
{
Contract.Requires <ArgumentNullException>(name != null);
Contract.Requires <ArgumentNullException>(ownerType != null);
}
public EventChainLink(object handler, bool handled, RoutingStrategies route)
{
Handler = handler ?? throw new ArgumentNullException(nameof(handler));
Handled = handled;
Route = route;
}
private TestInteractive CreateTree(
RoutedEvent ev,
EventHandler<RoutedEventArgs> handler,
RoutingStrategies handlerRoutes,
bool handledEventsToo = false)
{
TestInteractive target;
var tree = new TestInteractive
{
Name = "1",
Children = new[]
{
new TestInteractive
{
Name = "2a",
},
(target = new TestInteractive
{
Name = "2b",
Children = new[]
{
new TestInteractive
{
Name = "3",
},
},
}),
}
};
if (handler != null)
{
foreach (var i in tree.GetSelfAndVisualDescendents().Cast<Interactive>())
{
i.AddHandler(ev, handler, handlerRoutes, handledEventsToo);
}
}
return target;
}
public static RoutedEvent Register <TOwner, TEventArgs>(string name, RoutingStrategies routing)
where TEventArgs : RoutedEventArgs
{
return(RoutedEvent.Register <TOwner, TEventArgs>(name, routing));
}