private void ShowFaceTrackingVisualization()

in Kiosk/Controls/CameraControl.xaml.cs [385:456]
59 lines of code
16 McCabe index (conditional complexity)

        private void ShowFaceTrackingVisualization(Windows.Foundation.Size framePixelSize, IEnumerable<Windows.Media.FaceAnalysis.DetectedFace> detectedFaces)
        {
            this.FaceTrackingVisualizationCanvas.Children.Clear();

            double actualWidth = this.FaceTrackingVisualizationCanvas.ActualWidth;
            double actualHeight = this.FaceTrackingVisualizationCanvas.ActualHeight;

            if (captureManager.CameraStreamState == Windows.Media.Devices.CameraStreamState.Streaming &&
                detectedFaces != null && actualWidth != 0 && actualHeight != 0)
            {
                double widthScale = framePixelSize.Width / actualWidth;
                double heightScale = framePixelSize.Height / actualHeight;

                foreach (Windows.Media.FaceAnalysis.DetectedFace face in detectedFaces)
                {
                    RealTimeFaceIdentificationBorder faceBorder = new RealTimeFaceIdentificationBorder();
                    this.FaceTrackingVisualizationCanvas.Children.Add(faceBorder);

                    faceBorder.ShowFaceRectangle((uint)(face.FaceBox.X / widthScale), (uint)(face.FaceBox.Y / heightScale), (uint)(face.FaceBox.Width / widthScale), (uint)(face.FaceBox.Height / heightScale));

                    if (this.realTimeDataProvider != null)
                    {
                        Microsoft.Azure.CognitiveServices.Vision.Face.Models.DetectedFace detectedFace = this.realTimeDataProvider.GetLastFaceAttributesForFace(face.FaceBox);
                        IdentifiedPerson identifiedPerson = this.realTimeDataProvider.GetLastIdentifiedPersonForFace(face.FaceBox);
                        SimilarFace similarPersistedFace = this.realTimeDataProvider.GetLastSimilarPersistedFaceForFace(face.FaceBox);

                        string uniqueId = null;
                        if (similarPersistedFace != null)
                        {
                            uniqueId = similarPersistedFace.PersistedFaceId.GetValueOrDefault().ToString("N").Substring(0, 4);
                        }

                        if (detectedFace != null && detectedFace.FaceAttributes != null)
                        {
                            if (identifiedPerson != null && identifiedPerson.Person != null)
                            {
                                // age, gender and id available
                                faceBorder.ShowIdentificationData(detectedFace.FaceAttributes.Age.GetValueOrDefault(),
                                    detectedFace.FaceAttributes.Gender?.ToString(), (uint)Math.Round(identifiedPerson.Confidence * 100), identifiedPerson.Person.Name, uniqueId: uniqueId);
                            }
                            else
                            {
                                // only age and gender available
                                faceBorder.ShowIdentificationData(detectedFace.FaceAttributes.Age.GetValueOrDefault(),
                                    detectedFace.FaceAttributes.Gender?.ToString(), 0, null, uniqueId: uniqueId);
                            }

                            faceBorder.ShowRealTimeEmotionData(detectedFace.FaceAttributes.Emotion);
                        }
                        else if (identifiedPerson != null && identifiedPerson.Person != null)
                        {
                            // only id available
                            faceBorder.ShowIdentificationData(0, null, (uint)Math.Round(identifiedPerson.Confidence * 100), identifiedPerson.Person.Name, uniqueId: uniqueId);
                        }
                        else if (uniqueId != null)
                        {
                            // only unique id available
                            faceBorder.ShowIdentificationData(0, null, 0, null, uniqueId: uniqueId);
                        }
                    }

                    if (SettingsHelper.Instance.ShowDebugInfo)
                    {
                        this.FaceTrackingVisualizationCanvas.Children.Add(new TextBlock
                        {
                            Text = string.Format("Coverage: {0:0}%", 100 * ((double)face.FaceBox.Height / this.videoProperties.Height)),
                            Margin = new Thickness((uint)(face.FaceBox.X / widthScale), (uint)(face.FaceBox.Y / heightScale), 0, 0)
                        });
                    }
                }
            }
        }