private void RefreshReferenceLines(IPresentationImage targetImage)
        {
            DicomImagePlane targetImagePlane = DicomImagePlane.FromImage(targetImage);

            if (targetImagePlane == null)
            {
                return;
            }

            ReferenceLineCompositeGraphic referenceLineCompositeGraphic = _coordinator.GetReferenceLineCompositeGraphic(targetImage);

            if (referenceLineCompositeGraphic == null)
            {
                return;
            }

            bool showReferenceLines = this.Active && _currentReferenceImagePlane != null &&
                                      _currentReferenceImagePlane.IsInSameFrameOfReference(targetImagePlane);

            if (!showReferenceLines)
            {
                referenceLineCompositeGraphic.HideAllReferenceLines();
                return;
            }

            int i = 0;

            foreach (ReferenceLine referenceLine in GetAllReferenceLines(targetImagePlane))
            {
                ReferenceLineGraphic referenceLineGraphic = referenceLineCompositeGraphic[i++];
                referenceLineGraphic.Point1  = referenceLine.StartPoint;
                referenceLineGraphic.Point2  = referenceLine.EndPoint;
                referenceLineGraphic.Text    = referenceLine.Label;
                referenceLineGraphic.Visible = true;
            }

            // make any that aren't valid invisible.
            for (int j = i; j < referenceLineCompositeGraphic.Graphics.Count; ++j)
            {
                referenceLineCompositeGraphic[j].Visible = false;
            }
        }
        private void SetCurrentReferencePlane()
        {
            if (CurrentReferenceImage == this.SelectedPresentationImage)
            {
                return;
            }

            _currentReferenceImagePlane = DicomImagePlane.FromImage(this.SelectedPresentationImage);
            if (_currentReferenceImagePlane == null)
            {
                return;
            }

            ReferenceLineCompositeGraphic referenceLineCompositeGraphic =
                _coordinator.GetReferenceLineCompositeGraphic(CurrentReferenceImage);

            //Hide the current image's reference lines
            if (referenceLineCompositeGraphic != null)
            {
                referenceLineCompositeGraphic.HideAllReferenceLines();
            }
        }