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Added Frequency and Participant ID config parameters #4

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b7c8490
added frequency selection and participant id option
Sep 2, 2020
4cfdd18
fixed some config formatting
Sep 2, 2020
4bfedd3
changed gaze point validity check to be inline (more consistent with …
Oct 7, 2020
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67 changes: 58 additions & 9 deletions mainwindow.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ static uint32_t samples_written = 0;

void push_tobii_gaze(TobiiResearchGazeData *g, void *gaze_stream) {
auto gs = reinterpret_cast<lsl::stream_outlet *>(gaze_stream);
/*
if (!g->left_eye.gaze_point.validity) {
g->left_eye.gaze_point.position_on_display_area.x = NAN;
g->left_eye.gaze_point.position_on_display_area.y = NAN;
Expand All @@ -51,19 +52,23 @@ void push_tobii_gaze(TobiiResearchGazeData *g, void *gaze_stream) {
g->right_eye.gaze_point.position_on_display_area.x = NAN;
g->right_eye.gaze_point.position_on_display_area.y = NAN;
}
const float sample[] = {g->left_eye.gaze_point.position_on_display_area.x,
g->left_eye.gaze_point.position_on_display_area.y,
*/
const float sample[] = {g->device_time_stamp,
g->system_time_stamp,
g->left_eye.gaze_point.validity ? g->left_eye.gaze_point.position_on_display_area.x : NAN,
g->left_eye.gaze_point.validity ? g->left_eye.gaze_point.position_on_display_area.y : NAN,
g->left_eye.pupil_data.validity ? g->left_eye.pupil_data.diameter : NAN,
g->right_eye.gaze_point.position_on_display_area.x,
g->right_eye.gaze_point.position_on_display_area.y,
g->right_eye.gaze_point.validity ? g->right_eye.gaze_point.position_on_display_area.x : NAN,
g->right_eye.gaze_point.validity ? g->right_eye.gaze_point.position_on_display_area.y : NAN,
g->right_eye.pupil_data.validity ? g->right_eye.pupil_data.diameter : NAN};
gs->push_sample(sample, g->system_time_stamp / 1000000.);
gs->push_sample(sample);
samples_written++;
};

MainWindow::MainWindow(QWidget *parent, const char *config_file)
: QMainWindow(parent), ui(new Ui::MainWindow) {
ui->setupUi(this);
connect(ui->address, &QLineEdit::textChanged, this, &MainWindow::refresh_samplingrate);
connect(ui->actionLoad_Configuration, &QAction::triggered, [this]() {
load_config(QFileDialog::getOpenFileName(
this, "Load Configuration File", "", "Configuration Files (*.cfg)"));
Expand All @@ -90,12 +95,19 @@ MainWindow::MainWindow(QWidget *parent, const char *config_file)
void MainWindow::load_config(const QString &filename) {
QSettings settings(filename, QSettings::Format::IniFormat);
ui->address->setText(settings.value("TobiiPro/address", "127.0.0.1").toString());
ui->samplingrate->setText(settings.value("TobiiPro/rate", "60").toString());
ui->participant->setText(settings.value("Participant/ID", "P0").toString());
}

void MainWindow::save_config(const QString &filename) {
QSettings settings(filename, QSettings::Format::IniFormat);
settings.beginGroup("TobiiPro");
settings.setValue("address", ui->address->text());
settings.setValue("rate", ui->samplingrate->text());
settings.endGroup();
settings.beginGroup("Participant");
settings.setValue("ID", ui->participant->text());
settings.endGroup();
}

void MainWindow::closeEvent(QCloseEvent *ev) {
Expand All @@ -120,22 +132,50 @@ void MainWindow::refresh_eyetrackers() {
}
}

void MainWindow::refresh_samplingrate() {
ui->samplingrateDropdown->clear();
QString address = ui->address->text();
try {

QByteArray addr = address.toLocal8Bit();
auto res = tobii_research_get_eyetracker(addr.constData(), &current_tracker);
if (res != TOBII_RESEARCH_STATUS_OK)
return;

TobiiResearchGazeOutputFrequencies* frequencies = NULL;
size_t i = 0;
int status = tobii_research_get_all_gaze_output_frequencies(current_tracker, &frequencies);
for (; i < frequencies->frequency_count; i++) {
ui->samplingrateDropdown->addItem(QString::number(frequencies->frequencies[i]));
}
}
catch (std::exception & e) {
QMessageBox::critical(
this, "Error", QStringLiteral("Error: ") + e.what(), QMessageBox::Ok);
}


}

void MainWindow::toggleRecording() {
if (!gaze_stream) {
ui->linkButton->setEnabled(false);
// === perform link action ===
QString participant = ui->participant->text();
QString address = ui->address->text();
QString ratestr = ui->samplingrate->text();
bool ok = false;
double rate = ratestr.toDouble(&ok);

try {
QByteArray addr = address.toLocal8Bit();
auto res = tobii_research_get_eyetracker(addr.constData(), &current_tracker);
if (res != TOBII_RESEARCH_STATUS_OK)
throw std::runtime_error("Could not connect: " + std::to_string(res));

const auto samplingrate = 600; // TODO
// Start LSL outlet
std::string streamname = "Tobii";
lsl::stream_info info(streamname, "Eyetracker", 6, samplingrate, lsl::cf_float32,
lsl::stream_info info(streamname+"-"+participant.toLocal8Bit().constData(), "Eyetracker", 8,rate, lsl::cf_float32,
streamname + "at_" + address.toStdString());

// append some meta-data
Expand All @@ -147,6 +187,14 @@ void MainWindow::toggleRecording() {
.append_child_value("precision", "24");

auto channels = info.desc().append_child("channels");
channels.append_child("channel")
.append_child_value("label", "device_ts")
.append_child_value("type", "timestamp")
.append_child_value("unit", "milliseconds");
channels.append_child("channel")
.append_child_value("label", "system_ts")
.append_child_value("type", "timestamp")
.append_child_value("unit", "milliseconds");
channels.append_child("channel")
.append_child_value("label", "left_x")
.append_child_value("eye", "left")
Expand Down Expand Up @@ -183,6 +231,7 @@ void MainWindow::toggleRecording() {
// reset the counter
samples_written = 0;

tobii_research_set_gaze_output_frequency(current_tracker, rate);
// subscribe to the stream
res = tobii_research_subscribe_to_gaze_data(
current_tracker, push_tobii_gaze, gaze_stream.get());
Expand All @@ -202,15 +251,15 @@ void MainWindow::toggleRecording() {
this, "Error", QStringLiteral("Error: ") + e.what(), QMessageBox::Ok);
}
ui->linkButton->setEnabled(true);
ui->linkButton->setText("Unlink");
ui->linkButton->setText("Stop stream");
} else {
// === perform unlink action ===
ui->linkButton->setEnabled(false);
tobii_research_unsubscribe_from_gaze_data(current_tracker, push_tobii_gaze);
gaze_stream.reset();
statusTimer.stop();
ui->linkButton->setEnabled(true);
ui->linkButton->setText("Link");
ui->linkButton->setText("Start stream");
}
}

Expand Down
1 change: 1 addition & 0 deletions mainwindow.h
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ private slots:
void closeEvent(QCloseEvent *ev) override;
void toggleRecording();
void refresh_eyetrackers();
void refresh_samplingrate();

private:
// function for loading / saving the config file
Expand Down
62 changes: 53 additions & 9 deletions mainwindow.ui
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@
<item row="2" column="0">
<widget class="QLabel" name="addressLabel">
<property name="text">
<string>Tobii Address</string>
<string>Selected Address</string>
</property>
</widget>
</item>
Expand All @@ -48,14 +48,14 @@
</widget>
</item>
<item row="3" column="0">
<widget class="QLabel" name="samplingrateLabel">
<widget class="QLabel" name="samplingrateDropdownLabel">
<property name="text">
<string>Samplingrate</string>
<string>Rate options</string>
</property>
</widget>
</item>
<item row="3" column="1">
<widget class="QComboBox" name="samplingrate">
<widget class="QComboBox" name="samplingrateDropdown">
<property name="sizePolicy">
<sizepolicy hsizetype="Expanding" vsizetype="Fixed">
<horstretch>0</horstretch>
Expand All @@ -67,7 +67,35 @@
</property>
</widget>
</item>
<item row="4" column="0" colspan="2">
<item row="4" column="0">
<widget class="QLabel" name="samplingrateLabel">
<property name="text">
<string>Selected rate</string>
</property>
</widget>
</item>
<item row="4" column="1">
<widget class="QLineEdit" name="samplingrate">
<property name="text">
<string> </string>
</property>
</widget>
</item>
<item row="5" column="0">
<widget class="QLabel" name="participantLabel">
<property name="text">
<string>Participant</string>
</property>
</widget>
</item>
<item row="5" column="1">
<widget class="QLineEdit" name="participant">
<property name="text">
<string> </string>
</property>
</widget>
</item>
<item row="6" column="0" colspan="2">
<widget class="QPushButton" name="linkButton">
<property name="sizePolicy">
<sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
Expand All @@ -76,11 +104,11 @@
</sizepolicy>
</property>
<property name="text">
<string>Link</string>
<string>Start stream</string>
</property>
</widget>
</item>
<item row="5" column="0" colspan="2">
<item row="7" column="0" colspan="2">
<widget class="QGroupBox" name="groupBox">
<property name="title">
<string>Streams to enable</string>
Expand All @@ -96,7 +124,7 @@
</layout>
</widget>
</item>
<item row="7" column="0">
<item row="9" column="0">
<widget class="QLabel" name="tobiilogo">
<property name="sizePolicy">
<sizepolicy hsizetype="Minimum" vsizetype="Minimum">
Expand All @@ -112,7 +140,7 @@
</property>
</widget>
</item>
<item row="7" column="1">
<item row="9" column="1">
<widget class="QLabel" name="poweredbytobii">
<property name="text">
<string>This application is
Expand Down Expand Up @@ -201,5 +229,21 @@ powered by Tobii</string>
</hint>
</hints>
</connection>
<connection>
<sender>samplingrateDropdown</sender>
<signal>activated(QString)</signal>
<receiver>samplingrate</receiver>
<slot>setText(QString)</slot>
<hints>
<hint type="sourcelabel">
<x>150</x>
<y>57</y>
</hint>
<hint type="destinationlabel">
<x>150</x>
<y>107</y>
</hint>
</hints>
</connection>
</connections>
</ui>