Reply To: Fixation duration

[Robert [Tobii]]

Hi Manuel,

Here is the code that does what Anders explained, it is based on the MinimalGazeDataStream code sample in the EyeX SDK for .NET package.

namespace MinimalFixationDataStream
{
    using EyeXFramework;
    using System;
    using Tobii.EyeX.Framework;

    public static class Program
    {
        public static void Main(string[] args)
        {
            double lastFixationStartTime = 0;

            using (var eyeXHost = new EyeXHost())
            {
                eyeXHost.Start();

                // Create a data stream: lightly filtered gaze point data.
                // Other choices of data streams include EyePositionDataStream and FixationDataStream.
                using (var fixationGazeDataStream = eyeXHost.CreateFixationDataStream(FixationDataMode.Sensitive))
                {
                    // Write the data to the console.
                    fixationGazeDataStream.Next += (s, e) =>
                    {
                        if (e.EventType == FixationDataEventType.Begin)
                        {
                            lastFixationStartTime = e.Timestamp;
                        }
                        if (e.EventType == FixationDataEventType.End)
                        {
                            var lastFixationDuration = e.Timestamp - lastFixationStartTime;
                            Console.WriteLine("Last fixation duration: {0:0} milliseconds", lastFixationDuration);
                        }                     
                    };

                    // Let it run until a key is pressed.
                    Console.WriteLine("Listening for fixation data, press any key to exit...");
                    Console.In.Read();
                }
            }
        }
    }
}