public void HideCodeSegmentPreviewWindow ()
		{
			if (previewWindow != null) {
				previewWindow.Destroy ();
				previewWindow = null;
			}
		}

		void ShowTooltip (TextSegment segment, Rectangle hintRectangle)
		{
			if (previewWindow != null && previewWindow.Segment == segment)
				return;
			CancelCodeSegmentTooltip ();
			HideCodeSegmentPreviewWindow ();
			if (segment.IsInvalid || segment.Length == 0)
				return;
			codeSegmentTooltipTimeoutId = GLib.Timeout.Add (650, delegate {
				previewWindow = new CodeSegmentPreviewWindow (textEditor, false, segment);
				if (previewWindow.IsEmptyText) {
					previewWindow.Destroy ();
					previewWindow = null;
					return false;
				}
					
				int ox = 0, oy = 0;
				this.textEditor.GdkWindow.GetOrigin (out ox, out oy);
				ox += textEditor.Allocation.X;
				oy += textEditor.Allocation.Y;

				int x = hintRectangle.Right;
				int y = hintRectangle.Bottom;
				previewWindow.CalculateSize ();
				var req = previewWindow.SizeRequest ();
				int w = req.Width;
				int h = req.Height;

				var geometry = this.textEditor.Screen.GetUsableMonitorGeometry (this.textEditor.Screen.GetMonitorAtPoint (ox + x, oy + y));

				if (x + ox + w > geometry.X + geometry.Width)
					x = hintRectangle.Left - w;
				if (y + oy + h > geometry.Y + geometry.Height)
					y = hintRectangle.Top - h;
				int destX = System.Math.Max (0, ox + x);
				int destY = System.Math.Max (0, oy + y);
				previewWindow.Move (destX, destY);
				previewWindow.ShowAll ();
				return false;
			});
		}

		void ShowTooltip (ISegment segment, Rectangle hintRectangle)
		{
			if (previewSegment == segment)
				return;
			CancelCodeSegmentTooltip ();
			HideCodeSegmentPreviewWindow ();
			previewSegment = segment;
			if (segment == null) 
				return;
			codeSegmentTooltipTimeoutId = GLib.Timeout.Add (650, delegate {
				previewWindow = new CodeSegmentPreviewWindow (this.textEditor, false, segment);
				int ox = 0, oy = 0;
				this.textEditor.GdkWindow.GetOrigin (out ox, out oy);
				
				int x = hintRectangle.Right;
				int y = hintRectangle.Bottom;
				previewWindow.CalculateSize ();
				int w = previewWindow.SizeRequest ().Width;
				int h = previewWindow.SizeRequest ().Height;
				
				Gdk.Rectangle geometry = this.textEditor.Screen.GetMonitorGeometry (this.textEditor.Screen.GetMonitorAtPoint (ox + x, oy + y));
				
				if (x + ox + w > geometry.Right)
					x = hintRectangle.Left - w;
				if (y + oy + h > geometry.Bottom)
					y = hintRectangle.Top - h;
				int destX = System.Math.Max (0, ox + x);
				int destY = System.Math.Max (0, oy + y);
				previewWindow.Move (destX, destY);
				previewWindow.ShowAll ();
				return false;
			});
		}

		void DestroyPreviewWindow ()
		{
			if (previewWindow != null) {
				previewWindow.Destroy ();
				previewWindow = null;
			}
		}