Fixes an issue in Cross-Context dispatch that allows an event to doub…

…le-fire within the sending context

extensions/command/impl/CommandBinder.cs

@@ -229,14 +229,15 @@ private void removeSequence(ICommand command)
 			}
 		}
 
-		public void Trigger<T>(object data)
+		public bool Trigger<T>(object data)
 		{
-			Trigger (typeof(T), data);
+			return Trigger (typeof(T), data);
 		}
 
-		public void Trigger(object key, object data)
+		public bool Trigger(object key, object data)
 		{
 			ReactTo(key, data);
+			return true;
 		}
 
 		new public virtual  ICommandBinding Bind<T> ()

extensions/context/impl/CrossContextBridge.cs

@@ -71,20 +71,22 @@ override public IBinding Bind(object key)
 
 		#region ITriggerable implementation
 
-		public void Trigger<T> (object data)
+		public bool Trigger<T> (object data)
 		{
-			Trigger (typeof(T), data);
+			return Trigger (typeof(T), data);
 		}
 
-		public void Trigger (object key, object data)
+		public bool Trigger (object key, object data)
 		{
 			IBinding binding = GetBinding (key, null);
 			if (binding != null && !eventsInProgress.Contains(key))
 			{
 				eventsInProgress.Add (key);
 				crossContextDispatcher.Dispatch (key, data);
 				eventsInProgress.Remove (key);
+				return false;
 			}
+			return true;
 		}
 
 		#endregion

extensions/dispatcher/api/ITriggerable.cs

@@ -34,10 +34,12 @@ namespace strange.extensions.dispatcher.api
 	public interface ITriggerable
 	{
 		/// Cause this ITriggerable to access any provided Key in its Binder by the provided generic and data.
-		void Trigger<T>(object data);
+		/// <returns>false if the originator should abort dispatch</returns>
+		bool Trigger<T>(object data);
 
 		/// Cause this ITriggerable to access any provided Key in its Binder by the provided key and data.
-		void Trigger(object key, object data);
+		/// <returns>false if the originator should abort dispatch</returns>
+		bool Trigger(object key, object data);
 	}
 }
 

extensions/dispatcher/eventdispatcher/impl/EventDispatcher.cs

@@ -99,12 +99,16 @@ public void Dispatch (object eventType, object data)
 				data = new TmEvent(eventType, this, data);
 			}
 
+			bool continueDispatch = true;
 			if (triggerClients != null)
 			{
 				isTriggeringClients = true;
 				foreach (ITriggerable trigger in triggerClients)
 				{
-					trigger.Trigger(eventType, data);
+					if (!trigger.Trigger(eventType, data))
+					{
+						continueDispatch = false;
+					}
 				}
 				if (triggerClientRemovals != null)
 				{
@@ -113,6 +117,9 @@ public void Dispatch (object eventType, object data)
 				isTriggeringClients = false;
 			}
 
+			if (!continueDispatch)
+				return;
+
 			IEventBinding binding = GetBinding (eventType) as IEventBinding;
 			if (binding == null)
 			{
@@ -291,14 +298,15 @@ protected void flushRemovals()
 			triggerClientRemovals = null;
 		}
 
-		public void Trigger<T>(object data)
+		public bool Trigger<T>(object data)
 		{
-			Trigger (typeof(T), data);
+			return Trigger (typeof(T), data);
 		}
 
-		public void Trigger(object key, object data)
+		public bool Trigger(object key, object data)
 		{
 			Dispatch(key, data);
+			return true;
 		}
 	}
 }