Catrobat.IDE.WindowsPhone.Controls.ListsViewControls.CatrobatListView.CatrobatListViewMisc.CatrobatListViewWorker.StartDrag C# (CSharp) Method

        private void StartDrag(int index, double yPos)
        {
            var tmpItem = this.ContainerFromIndex(index) as CatrobatListViewItem;
            if (tmpItem == null || tmpItem.ReorderEnabled == false)
            {
                return;
            }
            _dragging = CatrobatListViewDragStaus.PrepareDraggin;
            _draggingItem = tmpItem;
            
            InitDragContentObject();

            if (_draggingItem.IsGrouped)
            {
                InitDragGroupList();
            }

            MoveValidationCalculation(index);

            AddSnapshotToManipulationCanvas(yPos);
        }