tracker/tobii: add tobii input

17 files changed, 316 insertions, 360 deletions

diff --git a/tracker-tobii/CMakeLists.txt b/tracker-tobii/CMakeLists.txt
index 8551c8fa..c70a874c 100644
--- a/tracker-tobii/CMakeLists.txt
+++ b/tracker-tobii/CMakeLists.txt
@@ -1,17 +1,14 @@
-# https://developer.tobii.com/download-packages/stream-engine-4-1-0-for-windows-x86
-# https://developer.tobii.com/download-packages/stream-engine-4-1-0-for-windows-x64
-set(SDK_TOBII "" CACHE PATH "Tobii SDK path")
-if(SDK_TOBII)
+# https://developer.tobii.com/download-packages/tobii-xr-native-sdk/
+set(SDK_TOBII "" CACHE PATH "Tobii Stream Engine path")
+if(WIN32 AND SDK_TOBII)
     otr_module(tracker-tobii)
+
     target_include_directories(${self} SYSTEM PRIVATE "${SDK_TOBII}/include")
+    target_link_directories(${self} PRIVATE "${SDK_TOBII}/lib/tobii")
 
     set(dll "${SDK_TOBII}/lib/tobii/tobii_stream_engine.dll")
-    set(lib "${SDK_TOBII}/lib/tobii/tobii_stream_engine.lib")
-
-    message(${self})
-    message(${dll})
-    message(${lib})
+    set(lib tobii_stream_engine.lib)
 
-    install(FILES ${dll} DESTINATION ${opentrack-hier-pfx})
     target_link_libraries(${self} ${lib})
+    install(FILES ${dll} DESTINATION ${opentrack-libexec})
 endif()
diff --git a/tracker-tobii/ftnoir_tracker_tobii.cpp b/tracker-tobii/ftnoir_tracker_tobii.cpp
deleted file mode 100644
index 595cf410..00000000
--- a/tracker-tobii/ftnoir_tracker_tobii.cpp
+++ /dev/null
@@ -1,65 +0,0 @@
-#include "ftnoir_tracker_tobii.h"
-#include "api/plugin-api.hpp"
-#include "compat/math.hpp"
-
-tobii::~tobii() = default;
-
-module_status tobii::start_tracker(QFrame*)
-{
-    t.start();
-    return status_ok();
-}
-
-void tobii::data(double *data)
-{
-    if (t.head_pose) {
-        tobii_head_pose_t p = *t.head_pose;
-        if (p.position_validity == TOBII_VALIDITY_VALID) {
-            if (center_pose.position_validity == TOBII_VALIDITY_VALID) {
-                p.position_xyz[0] = p.position_xyz[0] - center_pose.position_xyz[0];
-                p.position_xyz[1] = p.position_xyz[1] - center_pose.position_xyz[1];
-                p.position_xyz[2] = p.position_xyz[2] - center_pose.position_xyz[2];
-            }
-            else {
-                center_pose = p;
-            }
-            data[0] = std::clamp(p.position_xyz[0] * 30.0 / 300.0, -30.0, 30.0);
-            data[1] = std::clamp(p.position_xyz[1] * 30.0 / 300.0, -30.0, 30.0);
-            data[2] = std::clamp(p.position_xyz[2] * 30.0 / 300.0, -30.0, 30.0);
-        }
-
-        double max_yaw = 90.0;
-        if (p.rotation_validity_xyz[1] == TOBII_VALIDITY_VALID) {
-            if (center_pose.rotation_validity_xyz[1] == TOBII_VALIDITY_VALID) {
-                p.rotation_xyz[1] = p.rotation_xyz[1] - center_pose.rotation_xyz[1];
-            }
-            data[3] = std::clamp(p.rotation_xyz[1] * 100.0 * max_yaw / 90.0, -max_yaw, max_yaw);
-        }
-
-        double max_pitch = 90.0;
-        if (p.rotation_validity_xyz[0] == TOBII_VALIDITY_VALID) {
-            if (center_pose.rotation_validity_xyz[0] == TOBII_VALIDITY_VALID) {
-                p.rotation_xyz[0] = p.rotation_xyz[0] - center_pose.rotation_xyz[0];
-            }
-            data[4] = std::clamp(p.rotation_xyz[0] * 100.0 * max_pitch / 90.0, -max_pitch, max_pitch);
-        }
-
-        double max_roll = 90.0;
-        if (p.rotation_validity_xyz[2] == TOBII_VALIDITY_VALID) {
-            if (center_pose.rotation_validity_xyz[2] == TOBII_VALIDITY_VALID) {
-                p.rotation_xyz[2] = p.rotation_xyz[2] - center_pose.rotation_xyz[2];
-            }
-            data[5] = std::clamp(p.rotation_xyz[2] * 100.0 * max_roll / 90.0, -max_roll, max_roll);
-        }
-    }
-}
-
-bool tobii::center  ()
-{
-    if (t.head_pose) {
-        center_pose = *t.head_pose;
-    }
-    return false;
-}
-
-OPENTRACK_DECLARE_TRACKER(tobii, dialog_tobii, tobiiDll)
diff --git a/tracker-tobii/ftnoir_tracker_tobii.h b/tracker-tobii/ftnoir_tracker_tobii.h
deleted file mode 100644
index bd7a04a2..00000000
--- a/tracker-tobii/ftnoir_tracker_tobii.h
+++ /dev/null
@@ -1,50 +0,0 @@
-#pragma once
-#include "ui_ftnoir_tracker_tobii_controls.h"
-#include <QComboBox>
-#include <QCheckBox>
-#include <QSpinBox>
-#include <QMessageBox>
-#include <QSettings>
-#include <QList>
-#include <QFrame>
-#include <QStringList>
-#include <cmath>
-#include "api/plugin-api.hpp"
-#include "options/options.hpp"
-
-#include "thread.hpp"
-
-class tobii : public ITracker
-{
-public:
-    ~tobii();
-    module_status start_tracker(QFrame*) override;
-    void data(double* data) override;
-    virtual bool center() override;
-private:
-    tobii_thread t;
-    tobii_head_pose_t center_pose;
-};
-
-class dialog_tobii: public ITrackerDialog
-{
-    Q_OBJECT
-public:
-    dialog_tobii();
-    ~dialog_tobii() = default;
-    void register_tracker(ITracker *) {}
-    void unregister_tracker() {}
-    Ui::UITobiiControls ui;
-    tobii* tracker;
-private slots:
-    void doOK();
-    void doCancel();
-};
-
-class tobiiDll : public Metadata
-{
-    Q_OBJECT
-
-    QString name() { return tr("Tobii input"); }
-    QIcon icon() { return QIcon(":/images/opentrack.png"); }
-};
diff --git a/tracker-tobii/ftnoir_tracker_tobii_controls.ui b/tracker-tobii/ftnoir_tracker_tobii_controls.ui
deleted file mode 100644
index 6cd00121..00000000
--- a/tracker-tobii/ftnoir_tracker_tobii_controls.ui
+++ /dev/null
@@ -1,56 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<ui version="4.0">
-    <class>UITobiiControls</class>
-    <widget class="QWidget" name="UITobiiControls">
-        <property name="windowModality">
-            <enum>Qt::NonModal</enum>
-        </property>
-        <property name="geometry">
-            <rect>
-                <x>0</x>
-                <y>0</y>
-                <width>498</width>
-                <height>303</height>
-            </rect>
-        </property>
-        <property name="windowTitle">
-            <string>Tobii settings</string>
-        </property>
-        <property name="windowIcon">
-            <iconset>
-                <normaloff>../gui/images/opentrack.png</normaloff>../gui/images/opentrack.png
-            </iconset>
-        </property>
-        <layout class="QVBoxLayout" name="verticalLayout">
-            <property name="leftMargin">
-                <number>12</number>
-            </property>
-            <property name="topMargin">
-                <number>6</number>
-            </property>
-            <property name="rightMargin">
-                <number>12</number>
-            </property>
-            <property name="bottomMargin">
-                <number>6</number>
-            </property>
-            <item>
-                <widget class="QDialogButtonBox" name="buttonBox">
-                    <property name="standardButtons">
-                        <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
-                    </property>
-                </widget>
-            </item>
-        </layout>
-    </widget>
-    <tabstops>
-        <tabstop>buttonBox</tabstop>
-    </tabstops>
-    <resources/>
-    <connections/>
-    <slots>
-        <slot>startEngineClicked()</slot>
-        <slot>stopEngineClicked()</slot>
-        <slot>cameraSettingsClicked()</slot>
-    </slots>
-</ui>
diff --git a/tracker-tobii/ftnoir_tracker_tobii_dialog.cpp b/tracker-tobii/ftnoir_tracker_tobii_dialog.cpp
deleted file mode 100644
index 5cd4bad0..00000000
--- a/tracker-tobii/ftnoir_tracker_tobii_dialog.cpp
+++ /dev/null
@@ -1,19 +0,0 @@
-#include "ftnoir_tracker_tobii.h"
-#include "api/plugin-api.hpp"
-
-dialog_tobii::dialog_tobii() : tracker(nullptr)
-{
-    ui.setupUi( this );
-
-    // Connect Qt signals to member-functions
-    connect(ui.buttonBox, SIGNAL(accepted()), this, SLOT(doOK()));
-    connect(ui.buttonBox, SIGNAL(rejected()), this, SLOT(doCancel()));
-}
-
-void dialog_tobii::doOK() {
-    close();
-}
-
-void dialog_tobii::doCancel() {
-    close();
-}
diff --git a/tracker-tobii/lang/nl_NL.ts b/tracker-tobii/lang/nl_NL.ts
index 45e4974f..538a31f1 100644
--- a/tracker-tobii/lang/nl_NL.ts
+++ b/tracker-tobii/lang/nl_NL.ts
@@ -2,16 +2,20 @@
 <!DOCTYPE TS>
 <TS version="2.1" language="nl_NL">
 <context>
-    <name>UITobiiControls</name>
+    <name>tobii_metadata</name>
     <message>
-        <source>Tobii settings</source>
+        <source>Tobii Eye Tracker</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
 <context>
-    <name>tobiiDll</name>
+    <name>tobii_ui</name>
     <message>
-        <source>Tobii input</source>
+        <source>Tobii Eye Tracker</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Please make sure the Tobii Experience application is running and tracking is active.</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
diff --git a/tracker-tobii/lang/ru_RU.ts b/tracker-tobii/lang/ru_RU.ts
index ee73b375..b86ba010 100644
--- a/tracker-tobii/lang/ru_RU.ts
+++ b/tracker-tobii/lang/ru_RU.ts
@@ -2,16 +2,20 @@
 <!DOCTYPE TS>
 <TS version="2.1" language="ru_RU">
 <context>
-    <name>UITobiiControls</name>
+    <name>tobii_metadata</name>
     <message>
-        <source>Tobii settings</source>
+        <source>Tobii Eye Tracker</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
 <context>
-    <name>tobiiDll</name>
+    <name>tobii_ui</name>
     <message>
-        <source>Tobii input</source>
+        <source>Tobii Eye Tracker</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Please make sure the Tobii Experience application is running and tracking is active.</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
diff --git a/tracker-tobii/lang/stub.ts b/tracker-tobii/lang/stub.ts
index cd8a2bdc..566900a3 100644
--- a/tracker-tobii/lang/stub.ts
+++ b/tracker-tobii/lang/stub.ts
@@ -2,16 +2,20 @@
 <!DOCTYPE TS>
 <TS version="2.1">
 <context>
-    <name>UITobiiControls</name>
+    <name>tobii_metadata</name>
     <message>
-        <source>Tobii settings</source>
+        <source>Tobii Eye Tracker</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
 <context>
-    <name>tobiiDll</name>
+    <name>tobii_ui</name>
     <message>
-        <source>Tobii input</source>
+        <source>Tobii Eye Tracker</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Please make sure the Tobii Experience application is running and tracking is active.</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
diff --git a/tracker-tobii/lang/zh_CN.ts b/tracker-tobii/lang/zh_CN.ts
index 9ea8f636..cbf60176 100644
--- a/tracker-tobii/lang/zh_CN.ts
+++ b/tracker-tobii/lang/zh_CN.ts
@@ -2,16 +2,20 @@
 <!DOCTYPE TS>
 <TS version="2.1" language="zh_CN">
 <context>
-    <name>UITobiiControls</name>
+    <name>tobii_metadata</name>
     <message>
-        <source>Tobii settings</source>
+        <source>Tobii Eye Tracker</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
 <context>
-    <name>tobiiDll</name>
+    <name>tobii_ui</name>
     <message>
-        <source>Tobii input</source>
+        <source>Tobii Eye Tracker</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Please make sure the Tobii Experience application is running and tracking is active.</source>
         <translation type="unfinished"></translation>
     </message>
 </context>
diff --git a/tracker-tobii/thread.cpp b/tracker-tobii/thread.cpp
deleted file mode 100644
index bdd48125..00000000
--- a/tracker-tobii/thread.cpp
+++ /dev/null
@@ -1,109 +0,0 @@
-#include "thread.hpp"
-#include "compat/sleep.hpp"
-
-tobii_thread::~tobii_thread()
-{
-    exit_thread = true;
-    wait();
-
-    if (device) tobii_device_destroy(device);
-    if (api) tobii_api_destroy(api);
-
-    quit();
-}
-
-void tobii_thread::run()
-{
-    /* See https://developer.tobii.com/consumer-eye-trackers/stream-engine/ */
-    if (tobii_api_create(&api, nullptr, nullptr) != TOBII_ERROR_NO_ERROR)
-    {
-        error_last = "Failed to initialize the Tobii Stream Engine API.";
-        exit_thread = true;
-    }
-
-    std::vector<std::string> devices;
-    if (tobii_enumerate_local_device_urls(api,
-        [](char const* url, void* user_data)
-        {
-            auto list = (std::vector<std::string>*) user_data;
-            list->push_back(url);
-        }, &devices) != TOBII_ERROR_NO_ERROR)
-    {
-        error_last = "Failed to enumerate devices.";
-        exit_thread = true;
-    }
-
-    if (devices.size() == 0)
-    {
-        tobii_api_destroy(api);
-        error_last = "No stream engine compatible device(s) found.";
-        exit_thread = true;
-    }
-    std::string selected_device = devices[0];
-
-    unsigned int retry = 0;
-    tobii_error_t tobii_error = TOBII_ERROR_NO_ERROR;
-    do
-    {
-        tobii_error = tobii_device_create(api, selected_device.c_str(), TOBII_FIELD_OF_USE_INTERACTIVE, &device);
-        if ((tobii_error != TOBII_ERROR_CONNECTION_FAILED) && (tobii_error != TOBII_ERROR_FIRMWARE_UPGRADE_IN_PROGRESS)) break;
-        portable::sleep(interval);
-        ++retry;
-    } while (retry < retries);
-    if (tobii_error != TOBII_ERROR_NO_ERROR) {
-        tobii_api_destroy(api);
-        error_last = "Failed to connect to device.";
-        exit_thread = true;
-    }
-
-    if (tobii_head_pose_subscribe(device, [](tobii_head_pose_t const* head_pose, void* user_data) {
-
-        if ((*head_pose).position_validity != TOBII_VALIDITY_VALID
-            || (*head_pose).rotation_validity_xyz[0] != TOBII_VALIDITY_VALID
-            || (*head_pose).rotation_validity_xyz[1] != TOBII_VALIDITY_VALID
-            || (*head_pose).rotation_validity_xyz[2] != TOBII_VALIDITY_VALID) return;
-
-        tobii_head_pose_t* tobii_head_pose_storage = (tobii_head_pose_t*)user_data;
-        *tobii_head_pose_storage = *head_pose;
-
-        }, head_pose) != TOBII_ERROR_NO_ERROR)
-    {
-        error_last = "Failed to subscribe to head pose stream.";
-        exit_thread = true;
-    }
-
-    tobii_error = TOBII_ERROR_NO_ERROR;
-    while (!exit_thread)
-    {
-        tobii_error = tobii_wait_for_callbacks(1, &device);
-        if (tobii_error == TOBII_ERROR_TIMED_OUT) continue;
-        else if (tobii_error != TOBII_ERROR_NO_ERROR)
-        {
-            error_last = "tobii_wait_for_callbacks failed.";
-        }
-        
-        tobii_error = tobii_device_process_callbacks(device);
-        if (tobii_error == TOBII_ERROR_CONNECTION_FAILED)
-        {
-            unsigned int retry = 0;
-            auto tobii_error = TOBII_ERROR_NO_ERROR;
-            do
-            {
-                tobii_error = tobii_device_reconnect(device);
-                if ((tobii_error != TOBII_ERROR_CONNECTION_FAILED) && (tobii_error != TOBII_ERROR_FIRMWARE_UPGRADE_IN_PROGRESS)) break;
-                portable::sleep(interval);
-                ++retry;
-            } while (retry < retries);
-            if (tobii_error != TOBII_ERROR_NO_ERROR)
-            {
-                error_last = "Connection was lost and reconnection failed.";
-                exit_thread = true;
-            }
-            continue;
-        }
-        else if (tobii_error != TOBII_ERROR_NO_ERROR)
-        {
-            error_last = "tobii_device_process_callbacks failed.";
-        }
-    }
-}
diff --git a/tracker-tobii/thread.hpp b/tracker-tobii/thread.hpp
deleted file mode 100644
index d311db87..00000000
--- a/tracker-tobii/thread.hpp
+++ /dev/null
@@ -1,35 +0,0 @@
-#pragma once
-
-#include <QThread>
-#include <QCoreApplication>
-
-#include <tobii/tobii.h>
-#include <tobii/tobii_streams.h>
-#include <atomic>
-#include <vector>
-#include <string>
-
-class tobii_thread : public QThread
-{
-    Q_OBJECT
-    void run() override;
-
-public:
-    tobii_thread()
-    {
-        head_pose = new tobii_head_pose_t();
-    }
-    ~tobii_thread() override;
-
-    tobii_head_pose_t* head_pose;
-
-private:
-    tobii_api_t* api;
-    tobii_device_t* device;
-    
-    static constexpr unsigned int retries = 300;
-    static constexpr unsigned int interval = 100;
-
-    QString error_last = "";
-    std::atomic<bool> exit_thread = false;
-};
diff --git a/tracker-tobii/tobii.cpp b/tracker-tobii/tobii.cpp
new file mode 100644
index 00000000..e25cf52a
--- /dev/null
+++ b/tracker-tobii/tobii.cpp
@@ -0,0 +1,121 @@
+/* Copyright (c) 2023, Khoa Nguyen <khoanguyen@3forcom.com>
+
+ * Permission to use, copy, modify, and/or distribute this
+ * software for any purpose with or without fee is hereby granted,
+ * provided that the above copyright notice and this permission
+ * notice appear in all copies.
+ */
+
+#include "tobii.h"
+#include "compat/math-imports.hpp"
+
+#include <QMutexLocker>
+
+static constexpr double rad_to_deg = 180.0 * M_1_PI;
+static constexpr double mm_to_cm = 0.1;
+
+static void url_receiver(char const* url, void* user_data)
+{
+    char* buffer = (char*)user_data;
+    if (*buffer != '\0')
+        return; // only keep first value
+
+    if (strlen(url) < 256)
+        strcpy(buffer, url);
+}
+
+static void head_pose_callback(tobii_head_pose_t const* head_pose, void* user_data)
+{
+    // Store the latest head pose data in the supplied storage
+    tobii_head_pose_t* head_pose_storage = (tobii_head_pose_t*)user_data;
+    *head_pose_storage = *head_pose;
+}
+
+tobii_tracker::tobii_tracker() = default;
+
+tobii_tracker::~tobii_tracker()
+{
+    QMutexLocker lck(&mtx);
+    if (device)
+    {
+        tobii_head_pose_unsubscribe(device);
+        tobii_device_destroy(device);
+    }
+    if (api)
+    {
+        tobii_api_destroy(api);
+    }
+}
+
+module_status tobii_tracker::start_tracker(QFrame*)
+{
+    QMutexLocker lck(&mtx);
+    tobii_error_t tobii_error = tobii_api_create(&api, nullptr, nullptr);
+    if (tobii_error != TOBII_ERROR_NO_ERROR)
+    {
+        return error("Failed to initialize the Tobii Stream Engine API.");
+    }
+
+    char url[256] = { 0 };
+    tobii_error = tobii_enumerate_local_device_urls(api, url_receiver, url);
+    if (tobii_error != TOBII_ERROR_NO_ERROR || url[0] == '\0')
+    {
+        tobii_api_destroy(api);
+        return error("No stream engine compatible device(s) found.");
+    }
+
+    tobii_error = tobii_device_create(api, url, TOBII_FIELD_OF_USE_INTERACTIVE, &device);
+    if (tobii_error != TOBII_ERROR_NO_ERROR)
+    {
+        tobii_api_destroy(api);
+        return error(QString("Failed to connect to %1.").arg(url));
+    }
+
+    tobii_error = tobii_head_pose_subscribe(device, head_pose_callback, &latest_head_pose);
+    if (tobii_error != TOBII_ERROR_NO_ERROR)
+    {
+        tobii_device_destroy(device);
+        tobii_api_destroy(api);
+        return error("Failed to subscribe to head pose stream.");
+    }
+
+    return status_ok();
+}
+
+void tobii_tracker::data(double* data)
+{
+    QMutexLocker lck(&mtx);
+    tobii_error_t tobii_error = tobii_device_process_callbacks(device);
+    if (tobii_error != TOBII_ERROR_NO_ERROR)
+    {
+        return;
+    }
+
+    // Tobii coordinate system is different from OpenTrack's
+    // Tobii: +x is to the right, +y is up, +z is towards the user
+    // Rotation xyz is in radians, x is pitch, y is yaw, z is roll
+
+    if (latest_head_pose.position_validity == TOBII_VALIDITY_VALID)
+    {
+        data[TX] = -latest_head_pose.position_xyz[0] * mm_to_cm;
+        data[TY] = latest_head_pose.position_xyz[1] * mm_to_cm;
+        data[TZ] = latest_head_pose.position_xyz[2] * mm_to_cm;
+    }
+
+    if (latest_head_pose.rotation_validity_xyz[0] == TOBII_VALIDITY_VALID)
+    {
+        data[Pitch] = latest_head_pose.rotation_xyz[0] * rad_to_deg;
+    }
+
+    if (latest_head_pose.rotation_validity_xyz[1] == TOBII_VALIDITY_VALID)
+    {
+        data[Yaw] = -latest_head_pose.rotation_xyz[1] * rad_to_deg;
+    }
+
+    if (latest_head_pose.rotation_validity_xyz[2] == TOBII_VALIDITY_VALID)
+    {
+        data[Roll] = latest_head_pose.rotation_xyz[2] * rad_to_deg;
+    }
+}
+
+OPENTRACK_DECLARE_TRACKER(tobii_tracker, tobii_dialog, tobii_metadata)
diff --git a/tracker-tobii/tobii.h b/tracker-tobii/tobii.h
new file mode 100644
index 00000000..dedda7af
--- /dev/null
+++ b/tracker-tobii/tobii.h
@@ -0,0 +1,64 @@
+/* Copyright (c) 2023, Khoa Nguyen <khoanguyen@3forcom.com>
+
+ * Permission to use, copy, modify, and/or distribute this
+ * software for any purpose with or without fee is hereby granted,
+ * provided that the above copyright notice and this permission
+ * notice appear in all copies.
+ */
+
+#pragma once
+#include "api/plugin-api.hpp"
+#include "ui_tobii.h"
+
+#include <tobii/tobii.h>
+#include <tobii/tobii_streams.h>
+
+#include <QMutex>
+
+class tobii_tracker : public ITracker
+{
+public:
+    tobii_tracker();
+    ~tobii_tracker() override;
+    module_status start_tracker(QFrame*) override;
+    void data(double* data) override;
+
+private:
+    double last[6]{};
+
+    tobii_api_t* api = nullptr;
+    tobii_device_t* device = nullptr;
+
+    tobii_head_pose_t latest_head_pose {
+        0LL,
+        TOBII_VALIDITY_INVALID,
+        { 0.f, 0.f, 0.f },
+        { TOBII_VALIDITY_INVALID, TOBII_VALIDITY_INVALID, TOBII_VALIDITY_INVALID },
+        { 0.f, 0.f, 0.f },
+    };
+
+    QMutex mtx;
+};
+
+class tobii_dialog : public ITrackerDialog
+{
+    Q_OBJECT
+
+    Ui::tobii_ui ui;
+
+public:
+    tobii_dialog();
+    void register_tracker(ITracker*) override {}
+    void unregister_tracker() override {}
+private slots:
+    void doOK();
+    void doCancel();
+};
+
+class tobii_metadata : public Metadata
+{
+    Q_OBJECT
+
+    QString name() override { return tr("Tobii Eye Tracker"); }
+    QIcon icon() override { return QIcon(":/images/tobii_logo.png"); }
+};
diff --git a/tracker-tobii/tobii.qrc b/tracker-tobii/tobii.qrc
new file mode 100644
index 00000000..3e785ef7
--- /dev/null
+++ b/tracker-tobii/tobii.qrc
@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/images">
+        <file>tobii_logo.png</file>
+    </qresource>
+</RCC>
diff --git a/tracker-tobii/tobii.ui b/tracker-tobii/tobii.ui
new file mode 100644
index 00000000..71b29c12
--- /dev/null
+++ b/tracker-tobii/tobii.ui
@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>tobii_ui</class>
+ <widget class="QWidget" name="tobii_ui">
+  <property name="windowModality">
+   <enum>Qt::NonModal</enum>
+  </property>
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>278</width>
+    <height>58</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Tobii Eye Tracker</string>
+  </property>
+  <property name="windowIcon">
+   <iconset>
+    <normaloff>:/images/tobii_logo.png</normaloff>:/images/tobii_logo.png</iconset>
+  </property>
+  <property name="layoutDirection">
+   <enum>Qt::LeftToRight</enum>
+  </property>
+  <property name="autoFillBackground">
+   <bool>false</bool>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QLabel" name="label">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Minimum" vsizetype="Maximum">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="text">
+      <string>Please make sure the Tobii Experience application is running and tracking is active.</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Minimum" vsizetype="Maximum">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Close</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources>
+  <include location="tobii.qrc"/>
+ </resources>
+ <connections/>
+ <slots>
+  <slot>startEngineClicked()</slot>
+  <slot>stopEngineClicked()</slot>
+  <slot>cameraSettingsClicked()</slot>
+ </slots>
+</ui>
diff --git a/tracker-tobii/tobii_dialog.cpp b/tracker-tobii/tobii_dialog.cpp
new file mode 100644
index 00000000..689cae38
--- /dev/null
+++ b/tracker-tobii/tobii_dialog.cpp
@@ -0,0 +1,20 @@
+#include "tobii.h"
+
+tobii_dialog::tobii_dialog() // NOLINT(cppcoreguidelines-pro-type-member-init)
+{
+    ui.setupUi(this);
+
+    connect(ui.buttonBox, SIGNAL(accepted()), this, SLOT(doOK()));
+    connect(ui.buttonBox, SIGNAL(rejected()), this, SLOT(doCancel()));
+}
+
+void tobii_dialog::doOK()
+{
+    // s.b->save();
+    close();
+}
+
+void tobii_dialog::doCancel()
+{
+    close();
+}
diff --git a/tracker-tobii/tobii_logo.png b/tracker-tobii/tobii_logo.png
new file mode 100644
index 00000000..3502b37b
--- /dev/null
+++ b/tracker-tobii/tobii_logo.png