Wrapped more source triplets.

NTwain/ITwainSession.cs

@@ -1,4 +1,5 @@
 using NTwain.Data;
+using NTwain.Triplets;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
@@ -10,7 +11,7 @@ namespace NTwain
     /// <summary>
     /// General interface for a TWAIN session.
     /// </summary>
-    public interface ITwainSession : INotifyPropertyChanged, ITwainOperation
+    public interface ITwainSession : INotifyPropertyChanged
     {
         /// <summary>
         /// Gets the currently open source.
@@ -18,12 +19,82 @@ namespace NTwain
         /// <value>
         /// The current source.
         /// </value>
-        TwainSource Source { get; }
+        TwainSource CurrentSource { get; }
+
+        /// <summary>
+        /// Gets or sets the default source for this application.
+        /// While this can be get as long as the session is open,
+        /// it can only be set at State 3.
+        /// </summary>
+        /// <value>
+        /// The default source.
+        /// </value>
+        TwainSource DefaultSource { get; set; }
 
         /// <summary>
         /// Gets the current state number as defined by the TWAIN spec.
         /// </summary>
         /// <value>The state.</value>
         int State { get; }
+
+        /// <summary>
+        /// Gets the triplet operations defined for audio data group.
+        /// </summary>
+        DGAudio DGAudio { get; }
+
+        /// <summary>
+        /// Gets the triplet operations defined for control data group.
+        /// </summary>
+        DGControl DGControl { get; }
+
+        /// <summary>
+        /// Gets the triplet operations defined for image data group.
+        /// </summary>
+        DGImage DGImage { get; }
+
+        /// <summary>
+        /// Gets the direct triplet operation entry for custom values.
+        /// </summary>
+        DGCustom DGCustom { get; }
+
+        /// <summary>
+        /// Try to show the built-in source selector dialog and return the selected source.
+        /// This is not recommended and is only included for completeness.
+        /// </summary>
+        /// <returns></returns>
+        TwainSource ShowSourceSelector();
+
+        /// <summary>
+        /// Opens the data source manager. This must be the first method used
+        /// before using other TWAIN functions. Calls to this must be followed by <see cref="Close"/> when done with a TWAIN session.
+        /// </summary>
+        /// <returns></returns>
+        ReturnCode Open();
+
+        /// <summary>
+        /// Closes the data source manager.
+        /// </summary>
+        /// <returns></returns>
+        ReturnCode Close();
+
+        /// <summary>
+        /// Forces the stepping down of an opened source when things gets out of control.
+        /// Used when session state and source state become out of sync.
+        /// </summary>
+        /// <param name="targetState">State of the target.</param>
+        void ForceStepDown(int targetState);
+
+        /// <summary>
+        /// Gets list of sources available in the system.
+        /// </summary>
+        /// <returns></returns>
+        IEnumerable<TwainSource> GetSources();
+
+        /// <summary>
+        /// Gets the manager status. Only call this at state 2 or higher.
+        /// </summary>
+        /// <param name="session">The session.</param>
+        /// <returns></returns>
+        TWStatus GetStatus();
     }
 }