Initial move from old twain-in-dotnet.

NTwain/Triplets/DGControl/DGControl.Event.cs

@@ -0,0 +1,49 @@
+// The MIT License (MIT)
+// Copyright (c) 2013 Yin-Chun Wang
+//
+// Permission is hereby granted, free of charge, to any person obtaining a 
+// copy of this software and associated documentation files (the "Software"), 
+// to deal in the Software without restriction, including without limitation 
+// the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+// and/or sell copies of the Software, and to permit persons to whom the 
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included 
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 
+// OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+using NTwain.Data;
+using NTwain.Values;
+using System;
+
+namespace NTwain.Triplets
+{
+	sealed class Event : OpBase
+	{
+		internal Event(TwainSession session) : base(session) { }
+
+		/// <summary>
+		/// This operation supports the distribution of events from the application to Sources so that the
+		/// Source can maintain its user interface and return messages to the application. Once the
+		/// application has enabled the Source, it must immediately begin sending to the Source all events
+		/// that enter the application’s main event loop. This allows the Source to update its user interface
+		/// in real-time and to return messages to the application which cause state transitions. Even if the
+		/// application overrides the Source’s user interface, it must forward all events once the Source has
+		/// been enabled. The Source will tell the application whether or not each event belongs to the
+		/// Source.
+		/// </summary>
+		/// <param name="theEvent">The event.</param>
+		/// <returns></returns>
+		public ReturnCode ProcessEvent(TWEvent theEvent)
+		{
+			Session.VerifyState(4, 7, DataGroups.Control, DataArgumentType.Event, Message.ProcessEvent);
+			return PInvoke.DsmEntry(Session.AppId, Session.SourceId, Message.ProcessEvent, theEvent);
+		}
+	}
+}