lib-manipulation/src/main/java/com/nhaarman/listviewanimations/itemmanipulation/dragdrop/HoverDrawable.java
void handleMoveEvent(@NonNull final MotionEvent ev) {
        int top = (int) (mOriginalY - mDownY + ev.getY() + mScrollDistance);
        setTop(top);
    }
void handleMoveEvent(@NonNull final MotionEvent ev) {
        int top = (int) (mOriginalY - mDownY + ev.getY() + mScrollDistance);
        setTop(top);
    }
Calculates the new position for this {@code HoverDrawable} using given {@link MotionEvent}.

@param ev the {@code MotionEvent}.
{@code ev.getActionMasked()} should typically equal {@link MotionEvent#ACTION_MOVE}.