public DragCheckEventArgs(Point position, TransferDataType[] types, DragDropAction action)
 {
     DataTypes = types;
     Action = action;
     Position = position;
     Result = DragDropResult.None;
 }

		public DragEventArgs (Point position, Xwt.Backends.TransferDataStore dataStore, DragDropAction action)
		{
			Data = dataStore;
			Position = position;
			Action = action;
			Success = false;
		}

		public DragOverCheckEventArgs (Point position, TransferDataType[] types, DragDropAction action)
		{
			DataTypes = types;
			Action = action;
			Position = position;
			AllowedAction = DragDropAction.Default;
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="Xwt.Backends.DragStartData"/> class.
		/// </summary>
		/// <param name="data">The collection of data to be transferred through drag operation.</param>
		/// <param name="action">The type of the drag action.</param>
		/// <param name="imageBackend">The image backend of the drag image.</param>
		/// <param name="hotX">The image hotspot X coordinate.</param>
		/// <param name="hotY">The image hotspot Y coordinate.</param>
		internal DragStartData (TransferDataSource data, DragDropAction action, object imageBackend, double hotX, double hotY)
		{
			Data = data;
			DragAction = action;
			ImageBackend = imageBackend;
			HotX = hotX;
			HotY = hotY;
		}

 public void SetDragSource(DragDropAction dragAction, params Type[] types)
 {
     Backend.SetDragSource (types.Select (t => TransferDataType.FromType (t)).ToArray(), dragAction);
 }

        public void SetDragSource(TransferDataType [] types, DragDropAction dragAction)
        {
            if (DragDropInfo.AutodetectDrag)
                return; // Drag auto detect has been already activated.

            DragDropInfo.AutodetectDrag = true;
            Widget.MouseUp += WidgetMouseUpForDragHandler;
            Widget.MouseMove += WidgetMouseMoveForDragHandler;
        }

 public void DragStart(TransferDataSource data, DragDropAction dragAction, object imageBackend, double hotX, double hotY)
 {
     throw new NotImplementedException ();
 }

 public void SetDragTarget(string[] types, DragDropAction dragAction)
 {
     destDragAction = ConvertDragAction (dragAction);
     var table = Util.BuildTargetTable (types);
     validDropTypes = (Gtk.TargetEntry[]) table;
     Gtk.Drag.DestSet (Widget, Gtk.DestDefaults.Highlight, validDropTypes, destDragAction);
 }

 public DragOverEventArgs(Point position, ITransferData dataStore, DragDropAction action)
 {
     Position = position;
     Data = dataStore;
     Action = action;
     AllowedAction = DragDropAction.Default;
 }

 public void DragStart(TransferDataSource data, DragDropAction dragAction, object dragImage, double xhot, double yhot)
 {
     throw new NotImplementedException ();
 }

 public void SetDragSource(DragDropAction dragAction, params Type[] types)
 {
     Backend.SetDragSource (types.Select (t => t.FullName).ToArray(), dragAction);
 }

 internal void DragStart(TransferDataSource data, DragDropAction allowedDragActions, object image, double hotX, double hotY)
 {
     Backend.DragStart (data, allowedDragActions, image, hotX, hotY);
 }

 public void SetDragDropTarget(DragDropAction dragAction, params string[] types)
 {
     Backend.SetDragTarget (types, dragAction);
 }

 public void SetDragTarget(string [] types, DragDropAction dragAction)
 {
     throw new NotImplementedException ();
 }

 public void SetDragSource(TransferDataType[] types, DragDropAction dragAction)
 {
     AllocEventBox ();
     DragDropInfo.SourceDragAction = ConvertDragAction (dragAction);
     var table = Util.BuildTargetTable (types);
     OnSetDragSource (Gdk.ModifierType.Button1Mask, (Gtk.TargetEntry[]) table, DragDropInfo.SourceDragAction);
 }

 public void SetDragTarget(string[] types, DragDropAction dragAction)
 {
 }

 public void SetDragTarget(TransferDataType[] types, DragDropAction dragAction)
 {
     DragDropInfo.DestDragAction = ConvertDragAction (dragAction);
     var table = Util.BuildTargetTable (types);
     DragDropInfo.ValidDropTypes = (Gtk.TargetEntry[]) table;
     OnSetDragTarget (DragDropInfo.ValidDropTypes, DragDropInfo.DestDragAction);
 }

 public void DragStart(TransferDataSource data, DragDropAction dragAction, object imageBackend, double hotX, double hotY)
 {
     Gdk.DragAction action = ConvertDragAction (dragAction);
     currentDragData = data;
     Widget.DragBegin += HandleDragBegin;
     IconInitializer.Init (Widget, (Gdk.Pixbuf) imageBackend, hotX, hotY);
     Gtk.Drag.Begin (Widget, Util.BuildTargetTable (data.DataTypes), action, 1, Gtk.Global.CurrentEvent);
 }

 public void SetDragSource(string[] types, DragDropAction dragAction)
 {
 }

 public void SetDragDropTarget(DragDropAction dragAction, params Type[] types)
 {
     Backend.SetDragTarget (types.Select (t => TransferDataType.GetDataType (t)).ToArray(), dragAction);
 }