---

private moveWhole(point: Point): void {
  const snapshot = this.dragStateSnapshot;

  if (!snapshot || !this.dragStartPoint) {
    return;
  }

  if (
    snapshot.startTime === null ||
    snapshot.endTime === null ||
    snapshot.startPrice === null ||
    snapshot.endPrice === null
  ) {
    return;
  }

  const offsetX = point.x - this.dragStartPoint.x;
  const offsetY = point.y - this.dragStartPoint.y;

  const nextStartTime = this.shiftTime(snapshot.startTime, offsetX);
  const nextEndTime = this.shiftTime(snapshot.endTime, offsetX);

  if (nextStartTime === null || nextEndTime === null) {
    return;
  }

  const priceOffset = this.getPriceDelta(this.dragStartPoint.y, this.dragStartPoint.y + offsetY);

  this.startTime = nextStartTime;
  this.endTime = nextEndTime;
  this.startPrice = snapshot.startPrice + priceOffset;
  this.endPrice = snapshot.endPrice + priceOffset;
}