             dx = params.event.offsetX - srcSector.shape.cx;
                        dy = params.event.offsetY - srcSector.shape.cy;

                        zr.add(dragging);
                    }
                });

                chart.on('mouseup', function (params) {
                    if (dragging) {
                        var targetDataIndex = getHoveredDataIndex(params);
                        if (targetDataIndex != null
                            && targetDataIndex !== draggingDataIndex
     