case MotionEvent.ACTION_MOVE:
                ClipData data = ClipData.newPlainText("", "");
                DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(
                        view);
                shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint);
                view.startDrag(data, shadowBuilder, view, 0);
                TextView sigmaTv = (TextView) view;
                selectedSign = sigmaTv.getText().toString();
                newSign = true;
                break;