/// <summary>
        /// Draws dragged over glyph.
        /// </summary>
        /// <param name="stop">Bound stop.</param>
        /// <param name="context">DrawingContext.</param>
        private void _DrawDraggedOverGlyph(Stop stop, GanttItemElementDrawingContext context)
        {
            if (context.GlyphPanel == null)
            {
                return;
            }

            Rect elementRect = StopDrawer.GetElementRect(context);

            bool isStopFirst = false;

            if (stop.SequenceNumber == 1)
            {
                isStopFirst = true;
            }

            if (context.DrawDraggedOver && !context.DrawSelected && !_route.IsLocked)
            {
                context.GlyphPanel.AddGlyph(this, new StopDragOverGlyph(elementRect, isStopFirst));
            }
            else
            {
                context.GlyphPanel.RemoveGlyphByKey(this);
            }
        }