// Adds every point obtained from the EyeTracker to the list 'points' regardful of the page's offsets.
static void lightlyFilteredGazeDataStream_Next(object sender, FixationEventArgs e)
{
if (!(double.IsNaN(e.X) && double.IsNaN(e.Y)))
{
// "Convert" the driver to be able to use javascript.
IJavaScriptExecutor jsc = driver as IJavaScriptExecutor;
if (driver != null)
{
try
{
// Gets offset values using javascript.
int offsetY = Convert.ToInt32(jsc.ExecuteScript("return window.scrollY"));
int offsetX = Convert.ToInt32(jsc.ExecuteScript("return window.scrollX"));
// Adds offset values to each point obtained from Eyetracker.
points.Add(new PointF(Convert.ToSingle(e.X + offsetX), Convert.ToSingle(e.Y + offsetY)));
}
catch (Exception ex)
{
Debug.WriteLine(ex);
// If case of unexpected closure of the browser window.
DisposeAll();
}
}
}
}
private void RecordFixation(object s, FixationEventArgs e)
{
if (isFixationDataRecording)
{
fixations.Enqueue(new FixationEventArgs(e.EventType, e.X, e.Y, e.Timestamp));
}
}
private void EyeXHost_FixationDataStream(object sender, FixationEventArgs args)
{
Point fixationPoint = new Point(args.X, args.Y);
RunOnMainThread(() =>
{
FixationPoint = fixationPoint;
});
}
public void HandleEyeFixationEvent(object sender, FixationEventArgs e)
{
//Console.WriteLine("Fixation ({3})point at\t{0:0.0}\t{1:0}\t\t{2}", e.X, e.Y, e.Timestamp, e.EventType);
if (this.tcpServer.Connected && this.isFixationDataActive )
{
SendGaze((int)e.X, (int)e.Y, 0, TobiiGazeHandler.METHOD_FIXATION, new string[]{""+e.EventType});
}
}
private void fixationEventHandler(object sender, FixationEventArgs e)
{
if (!double.IsNaN(e.X) && !double.IsNaN(e.Y))
{
eyeGazeAbsolute.X = (int)e.X;
eyeGazeAbsolute.Y = (int)e.Y;
}
//this.pictureBox1.Invalidate();
//this.pictureBox2.Invalidate();
//this.pictureBox3.Invalidate();
}
private void fixationEventHandler(object sender, FixationEventArgs e)
{
if (!double.IsNaN(e.X) && !double.IsNaN(e.Y))
{
absoluteX = (int)e.X;
absoluteY = (int)e.Y;
//Find the closest word
int squaredDist = 0;
readWord = closestWord(relativeX, relativeY, out squaredDist);
int thresholdMinDistSquare = 80 * 80;
if (squaredDist < thresholdMinDistSquare)
{
//If mode == tag cloud
if (mode == Mode.TagCLoud)
{
if (wordFrequency.ContainsKey(readWord.Text))
{
wordFrequency[readWord.Text]++;
}
else
{
wordFrequency.Add(readWord.Text, 1);
}
//sort the dictionary
//wordFrequency = wordFrequency.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
//Invalidate the picturebox for calling pictureBox1_Paint again
this.pictureBoxWordle.Invalidate();
}
//Else if mode == Speech Synthesize
else
{
//Read the word only if the previous fixation is near the current one
if (Math.Abs(previousX - absoluteX) < 5 && Math.Abs(previousY - absoluteY) < 5 && readWord.Text != previousWord)
{
s.Speak(readWord.Text);
previousWord = readWord.Text;
}
previousX = absoluteX;
previousY = absoluteY;
}
}
else
{
readWord = null;
}
this.labelRead.Invalidate();
this.pictureBoxText.Invalidate();
}
}
/// <summary>
/// Invoked when EyeX engine detect a gaze change
/// </summary>
/// <param name="source">EyeX original stream publishing this event</param>
/// <param name="evt">Gaze event details, including current time and gaze position</param>
protected void OnGazeChange(Object source, FixationEventArgs evt)
{
if (evt.Timestamp - last > duration)
{
var end = new Point((int)evt.X, (int)evt.Y);
last = evt.Timestamp;
positions.Clear();
// compute straight formula for interpolation
var a = (double)(end.Y - Position.Y) / (end.X - Position.X);
var b = Position.Y - a * Position.X;
if (a == double.PositiveInfinity || a == double.NegativeInfinity)
{
// vertical straight
var step = (double)(end.Y - Position.Y) / interpolated;
foreach (var i in Enumerable.Range(1, interpolated))
{
// interpolate enought points for the next interval
double y = Position.Y + step * i;
var added = new Point(Position.X, (int)y);
positions.Enqueue(cropToDisplay(added));
}
}
else
{
// classical straight
var step = (double)(end.X - Position.X) / interpolated;
foreach (var i in Enumerable.Range(1, interpolated))
{
// interpolate enought points for the next interval
double x = Position.X + step * i;
var added = new Point((int)x, (int)(a * x + b));
positions.Enqueue(cropToDisplay(added));
}
}
}
}
void OnFixationPointNext(object sender, FixationEventArgs e)
{
RaiseGazeEvent(e.X, e.Y, e.Timestamp);
}
private void FixationDataStream_Next(object sender, FixationEventArgs e)
{
lock (fixation)
fixation = e;
}
private void InvokeFixationEvent(object s, FixationEventArgs e)
{
FixationEvent.Invoke(s, e);
}
