private void SendIdentifiedFrequency([NotNull] WebBrowserAssistantServer.Client client, int frequencyIndex)
{
if (frequencyIndex < 0 || frequencyIndex >= _frequencyCount)
{
frequencyIndex = AbsentFrequencyIndex;
}
_server.SendMessageToClient(client, new OutgoingMessage {
Type = "Frequency", FrequencyIndex = frequencyIndex
});
}
void WebBrowserAssistantServer.IClientMessageHandler.Handle(WebBrowserAssistantServer.Client client, IncomingMessage message)
{
// ReSharper disable once SwitchStatementMissingSomeCases
switch (message.Type)
{
case "Handshake":
var frequencies = _paradigm.Config.User.StimulationScheme.Frequencies;
var schemes = new OutgoingMessage.VisualScheme[frequencies.Count];
for (var i = 0; i < frequencies.Count; i++)
{
schemes[i].Frequency = frequencies[i];
schemes[i].BorderThickness = IndicatorBorderThicknesses[i % IndicatorBorderThicknesses.Length];
schemes[i].BorderStyle = IndicatorBorderStyles[i % IndicatorBorderStyles.Length];
schemes[i].Color = VisualColors[i % VisualColors.Length];
}
_server.SendMessageToClient(client, new OutgoingMessage
{
Type = "Handshake", Debug = _paradigm.Config.System.DebugInformation,
HomePage = _paradigm.Config.User.HomePage,
VisualSchemes = schemes,
MaxActiveDistance = _paradigm.Config.User.CursorMovementTolerance,
ConfirmationDelay = _paradigm.Config.User.ConfirmationDelay,
EdgeScrolling = _paradigm.Config.User.EnableEdgeScrolling,
StimulationSize = new Point
{
X = _paradigm.Config.User.StimulationSize.Width,
Y = _paradigm.Config.User.StimulationSize.Height
},
Mode = Mode
});
break;
case "Mode":
Mode = message.Mode ?? Mode.Normal;
break;
}
}
private void SendScroll([NotNull] WebBrowserAssistantServer.Client client, Point scrollDistance) =>
_server.SendMessageToClient(client, new OutgoingMessage {
Type = "Scroll", ScrollDistance = scrollDistance
});
private void RunTrial([NotNull] WebBrowserAssistantServer.Client client)
{
var scene = client.Scene;
var dimensions = client.Dimensions;
var detector = scene == Scene.Keyboard ? _spellingSsvepDetector : _navigatingSsvepDetector;
var edgeScrolling = _paradigm.Config.User.EnableEdgeScrolling && dimensions != null;
var edgeScrollHotAreaSize = _paradigm.Config.User.EdgeScrollingHotAreaSize;
var edgeScrollSpeed = _paradigm.Config.User.EdgeScrollingSpeed;
/* Initialize signals. */
_dwellTrialController.Reset();
_trialStartEvent.Reset();
_trialCancelled.Reset();
/* Waiting for the start signal. */
Point gazePoint;
if (edgeScrolling)
{
while (!_trialStartEvent.WaitOne(TimeSpan.FromMilliseconds(20)))
{
if (!_gazePointProvider.TryGetCurrentPosition(out gazePoint))
{
continue;
}
var area = GetGazeArea(dimensions, edgeScrollHotAreaSize, gazePoint);
if (area == 0)
{
continue;
}
var verticalScrollDistance = dimensions.WindowInnerSize.Height * edgeScrollSpeed;
SendScroll(client, new Point {
X = 0, Y = area * verticalScrollDistance
});
}
}
else
{
_trialStartEvent.WaitOne();
}
if (!_gazePointProvider.TryGetCurrentPosition(out gazePoint))
{
return;
}
_server.SendMessageToClient(client, new OutgoingMessage {
Type = "StartTrial", GazePoint = gazePoint
});
var cancelled = true;
detector.IsActive = true;
try
{
/* Waiting for the ending of trial or cancelled by system. */
var stimulationMillis = (int)(detector.WindowSizeInSecs * 1000);
cancelled = _trialCancelled.WaitOne(stimulationMillis + SsvepDelayMillis);
if (cancelled)
{
return;
}
_server.SendMessageToClient(client, new OutgoingMessage {
Type = "EndTrial"
});
}
finally
{
detector.IsActive = false;
if (cancelled)
{
SendIdentifiedFrequency(client, AbsentFrequencyIndex);
}
}
/* Send identified frequency index. */
var result = detector.Identify();
SendIdentifiedFrequency(client, result.State == IdentificationState.Success ? result.FrequencyIndex : AbsentFrequencyIndex);
Logger.Info("RunTrial", "result", result);
}
