Add Linux Joystick Support

Add support for Linux joystick devices, this allows things like the EDTracker to
work, and possibly other devices.

10 files changed, 1122 insertions, 0 deletions

diff --git a/tracker-linux-joystick/CMakeLists.txt b/tracker-linux-joystick/CMakeLists.txt
new file mode 100644
index 00000000..4e821b01
--- /dev/null
+++ b/tracker-linux-joystick/CMakeLists.txt
@@ -0,0 +1,4 @@
+if(LINUX)
+    otr_module(tracker-linux-joystick)
+    target_link_libraries(opentrack-tracker-linux-joystick)
+endif()
diff --git a/tracker-linux-joystick/ftnoir_tracker_linux_joystick.cpp b/tracker-linux-joystick/ftnoir_tracker_linux_joystick.cpp
new file mode 100644
index 00000000..8fa600e7
--- /dev/null
+++ b/tracker-linux-joystick/ftnoir_tracker_linux_joystick.cpp
@@ -0,0 +1,87 @@
+/* Copyright (c) 2013 Stanislaw Halik <sthalik@misaki.pl>
+ *
+ * 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 "ftnoir_tracker_linux_joystick.h"
+#include "api/plugin-api.hpp"
+#include "compat/math.hpp"
+#include <QMutexLocker>
+
+joystick::joystick()
+{
+    QString device = getJoystickDevice(s.guid);
+    joy_fd = open(device.toUtf8().data(), O_RDONLY | O_NONBLOCK);
+}
+
+
+joystick::~joystick() {
+    if (joy_fd > 0) close(joy_fd);
+}
+
+module_status joystick::start_tracker(QFrame *)
+{
+    if (joy_fd == -1) return error("Couldn't open joystick");
+    return status_ok();
+}
+
+
+void joystick::data(double *data)
+{
+    int map[6] = {
+        s.joy_1 - 1,
+        s.joy_2 - 1,
+        s.joy_3 - 1,
+        s.joy_4 - 1,
+        s.joy_5 - 1,
+        s.joy_6 - 1,
+    };
+
+    const double limits[] = {
+        100,
+        100,
+        100,
+        180,
+        180,
+        180
+    };
+
+    const QString guid = s.guid;
+    int axes[8];
+    struct js_event event;
+    bool ret = true;
+    if (read(joy_fd, &event, sizeof(event)) > 0)
+    {
+        switch (event.type)
+        {
+        case JS_EVENT_AXIS:
+            if (event.number >= 8) break;
+            axes_state[event.number] = event.value;
+
+            break;
+        default:
+            /* Ignore init/button events. */
+            break;
+        }
+    }
+
+    for (int i = 0; i < 6; i++)
+    {
+        axes[i] = axes_state[i];
+    }
+    if (ret)
+    {
+        for (int i = 0; i < 6; i++)
+        {
+            int k = map[i];
+            if (k < 0 || k >= 8)
+                data[i] = 0;
+            else
+                data[i] = clamp(axes[k] * limits[i] / AXIS_MAX,
+                                -limits[i], limits[i]);
+        }
+    }
+}
+
+OPENTRACK_DECLARE_TRACKER(joystick, dialog_joystick, joystickDll)
diff --git a/tracker-linux-joystick/ftnoir_tracker_linux_joystick.h b/tracker-linux-joystick/ftnoir_tracker_linux_joystick.h
new file mode 100644
index 00000000..6ddc4909
--- /dev/null
+++ b/tracker-linux-joystick/ftnoir_tracker_linux_joystick.h
@@ -0,0 +1,90 @@
+/* Copyright (c) 2013 Stanislaw Halik <sthalik@misaki.pl>
+ *
+ * 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 "ui_ftnoir_tracker_linux_joystick_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 <linux/joystick.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "options/options.hpp"
+using namespace options;
+
+struct settings : opts {
+    value<QString> guid;
+    value<int> joy_1, joy_2, joy_3, joy_4, joy_5, joy_6;
+    settings() :
+        opts("tracker-linux-joystick"),
+        guid(b, "joy-guid", ""),
+        joy_1(b, "axis-map-1", 1),
+        joy_2(b, "axis-map-2", 2),
+        joy_3(b, "axis-map-3", 3),
+        joy_4(b, "axis-map-4", 4),
+        joy_5(b, "axis-map-5", 5),
+        joy_6(b, "axis-map-6", 6)
+    {}
+};
+
+struct linux_joystick {
+    QString name;
+    QString device_id;
+    QString dev;
+};
+QList<linux_joystick> getJoysticks();
+QString getJoystickDevice(QString guid);
+
+class joystick : public ITracker
+{
+public:
+    joystick();
+    ~joystick();
+    module_status start_tracker(QFrame *);
+    void data(double *data);
+    settings s;
+    QString guid;
+    static constexpr int AXIS_MAX = USHRT_MAX;
+    int axes_state[6] = {0};
+    int joy_fd;
+};
+
+class dialog_joystick: public ITrackerDialog
+{
+    Q_OBJECT
+public:
+    dialog_joystick();
+    void register_tracker(ITracker *) {}
+    void unregister_tracker() {}
+    Ui::UILinuxJoystickControls ui;
+    joystick* tracker;
+    settings s;
+    struct joys {
+        QString name;
+        QString guid;
+    };
+    QList<joys> joys_;
+private slots:
+    void doOK();
+    void doCancel();
+};
+
+class joystickDll : public Metadata
+{
+    Q_OBJECT
+
+    QString name() { return tr("Linux Joystick input"); }
+    QIcon icon() { return QIcon(":/images/opentrack.png"); }
+};
diff --git a/tracker-linux-joystick/ftnoir_tracker_linux_joystick_controls.ui b/tracker-linux-joystick/ftnoir_tracker_linux_joystick_controls.ui
new file mode 100644
index 00000000..2a54c74a
--- /dev/null
+++ b/tracker-linux-joystick/ftnoir_tracker_linux_joystick_controls.ui
@@ -0,0 +1,492 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>UILinuxJoystickControls</class>
+ <widget class="QWidget" name="UILinuxJoystickControls">
+  <property name="windowModality">
+   <enum>Qt::NonModal</enum>
+  </property>
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>498</width>
+    <height>334</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Tracker 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="QFrame" name="frame">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="frameShape">
+      <enum>QFrame::NoFrame</enum>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QLabel" name="label">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="text">
+         <string>Device</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QComboBox" name="joylist">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Mapping</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="0" column="1">
+       <widget class="QComboBox" name="joy_1">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="currentIndex">
+         <number>1</number>
+        </property>
+        <item>
+         <property name="text">
+          <string>Disabled</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #1</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #2</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #3</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #4</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #5</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #6</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #7</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #8</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QComboBox" name="joy_2">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="currentIndex">
+         <number>2</number>
+        </property>
+        <item>
+         <property name="text">
+          <string>Disabled</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #1</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #2</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #3</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #4</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #5</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #6</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #7</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #8</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QComboBox" name="joy_3">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="currentIndex">
+         <number>3</number>
+        </property>
+        <item>
+         <property name="text">
+          <string>Disabled</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #1</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #2</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #3</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #4</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #5</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #6</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #7</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #8</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="3" column="1">
+       <widget class="QComboBox" name="joy_4">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="currentIndex">
+         <number>4</number>
+        </property>
+        <item>
+         <property name="text">
+          <string>Disabled</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #1</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #2</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #3</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #4</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #5</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #6</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #7</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #8</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="4" column="1">
+       <widget class="QComboBox" name="joy_5">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="currentIndex">
+         <number>5</number>
+        </property>
+        <item>
+         <property name="text">
+          <string>Disabled</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #1</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #2</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #3</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #4</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #5</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #6</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #7</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #8</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="5" column="1">
+       <widget class="QComboBox" name="joy_6">
+        <property name="sizePolicy">
+         <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
+          <horstretch>0</horstretch>
+          <verstretch>0</verstretch>
+         </sizepolicy>
+        </property>
+        <property name="currentIndex">
+         <number>6</number>
+        </property>
+        <item>
+         <property name="text">
+          <string>Disabled</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #1</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #2</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #3</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #4</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #5</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #6</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #7</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Joystick axis #8</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="0" column="0">
+       <widget class="QLabel" name="label_5">
+        <property name="text">
+         <string>X</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QLabel" name="label_6">
+        <property name="text">
+         <string>Y</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="0">
+       <widget class="QLabel" name="label_7">
+        <property name="text">
+         <string>Z</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="0">
+       <widget class="QLabel" name="label_2">
+        <property name="text">
+         <string>Yaw</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="0">
+       <widget class="QLabel" name="label_3">
+        <property name="text">
+         <string>Pitch</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="0">
+       <widget class="QLabel" name="label_4">
+        <property name="text">
+         <string>Roll</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <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-linux-joystick/ftnoir_tracker_linux_joystick_dialog.cpp b/tracker-linux-joystick/ftnoir_tracker_linux_joystick_dialog.cpp
new file mode 100644
index 00000000..1cf75bc1
--- /dev/null
+++ b/tracker-linux-joystick/ftnoir_tracker_linux_joystick_dialog.cpp
@@ -0,0 +1,40 @@
+#include "ftnoir_tracker_linux_joystick.h"
+#include "api/plugin-api.hpp"
+
+dialog_joystick::dialog_joystick() : 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()));
+
+    QList<::linux_joystick> joysticks = getJoysticks();
+
+    for (int i = 0; i < joysticks.size(); i++) {
+        ::linux_joystick joy = joysticks[i];
+        joys_.push_back(joys { joy.name, joy.device_id});
+        ui.joylist->addItem(QString("%1 | %2").arg(joy.dev).arg(joy.name));
+        if (joysticks[i].device_id == s.guid) ui.joylist->setCurrentIndex(i);
+    }
+
+    tie_setting(s.joy_1, ui.joy_1);
+    tie_setting(s.joy_2, ui.joy_2);
+    tie_setting(s.joy_3, ui.joy_3);
+    tie_setting(s.joy_4, ui.joy_4);
+    tie_setting(s.joy_5, ui.joy_5);
+    tie_setting(s.joy_6, ui.joy_6);
+}
+
+void dialog_joystick::doOK() {
+    int idx = ui.joylist->currentIndex();
+    static const joys def { {}, {} };
+    auto val = joys_.value(idx, def);
+    s.guid = val.guid;
+    s.b->save();
+    close();
+}
+
+void dialog_joystick::doCancel() {
+    close();
+}
diff --git a/tracker-linux-joystick/lang/nl_NL.ts b/tracker-linux-joystick/lang/nl_NL.ts
new file mode 100644
index 00000000..1c9b89d0
--- /dev/null
+++ b/tracker-linux-joystick/lang/nl_NL.ts
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE TS>
+<TS version="2.1" language="nl_NL">
+<context>
+    <name>UILinuxJoystickControls</name>
+    <message>
+        <source>Tracker settings</source>
+        <translation type="unfinished">Tracker-instellingen</translation>
+    </message>
+    <message>
+        <source>Device</source>
+        <translation type="unfinished">Apparaat</translation>
+    </message>
+    <message>
+        <source>Mapping</source>
+        <translation type="unfinished">Verwijzing</translation>
+    </message>
+    <message>
+        <source>Disabled</source>
+        <translation type="unfinished">Uitgeschakeld</translation>
+    </message>
+    <message>
+        <source>Joystick axis #1</source>
+        <translation type="unfinished">Joystick-as #1</translation>
+    </message>
+    <message>
+        <source>Joystick axis #2</source>
+        <translation type="unfinished">Joystick-as #2</translation>
+    </message>
+    <message>
+        <source>Joystick axis #3</source>
+        <translation type="unfinished">Joystick-as #3</translation>
+    </message>
+    <message>
+        <source>Joystick axis #4</source>
+        <translation type="unfinished">Joystick-as #4</translation>
+    </message>
+    <message>
+        <source>Joystick axis #5</source>
+        <translation type="unfinished">Joystick-as #5</translation>
+    </message>
+    <message>
+        <source>Joystick axis #6</source>
+        <translation type="unfinished">Joystick-as #6</translation>
+    </message>
+    <message>
+        <source>Joystick axis #7</source>
+        <translation type="unfinished">Joystick-as #7</translation>
+    </message>
+    <message>
+        <source>Joystick axis #8</source>
+        <translation type="unfinished">Joystick-as #8</translation>
+    </message>
+    <message>
+        <source>X</source>
+        <translation type="unfinished">X</translation>
+    </message>
+    <message>
+        <source>Y</source>
+        <translation type="unfinished">Y</translation>
+    </message>
+    <message>
+        <source>Z</source>
+        <translation type="unfinished">Z</translation>
+    </message>
+    <message>
+        <source>Yaw</source>
+        <translation type="unfinished">Yaw</translation>
+    </message>
+    <message>
+        <source>Pitch</source>
+        <translation type="unfinished">Pitch</translation>
+    </message>
+    <message>
+        <source>Roll</source>
+        <translation type="unfinished">Rol</translation>
+    </message>
+</context>
+<context>
+    <name>joystickDll</name>
+    <message>
+        <source>Linux Joystick input</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+</TS>
diff --git a/tracker-linux-joystick/lang/ru_RU.ts b/tracker-linux-joystick/lang/ru_RU.ts
new file mode 100644
index 00000000..34ed1089
--- /dev/null
+++ b/tracker-linux-joystick/lang/ru_RU.ts
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE TS>
+<TS version="2.1" language="ru_RU">
+<context>
+    <name>UILinuxJoystickControls</name>
+    <message>
+        <source>Tracker settings</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Device</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Mapping</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Disabled</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #1</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #2</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #3</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #4</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #5</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #6</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #7</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #8</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>X</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Y</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Z</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Yaw</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Pitch</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Roll</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>joystickDll</name>
+    <message>
+        <source>Linux Joystick input</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+</TS>
diff --git a/tracker-linux-joystick/lang/stub.ts b/tracker-linux-joystick/lang/stub.ts
new file mode 100644
index 00000000..12dc1400
--- /dev/null
+++ b/tracker-linux-joystick/lang/stub.ts
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE TS>
+<TS version="2.1">
+<context>
+    <name>UILinuxJoystickControls</name>
+    <message>
+        <source>Tracker settings</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Device</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Mapping</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Disabled</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #1</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #2</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #3</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #4</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #5</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #6</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #7</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #8</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>X</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Y</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Z</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Yaw</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Pitch</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Roll</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>joystickDll</name>
+    <message>
+        <source>Linux Joystick input</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+</TS>
diff --git a/tracker-linux-joystick/lang/zh_CN.ts b/tracker-linux-joystick/lang/zh_CN.ts
new file mode 100644
index 00000000..12dc1400
--- /dev/null
+++ b/tracker-linux-joystick/lang/zh_CN.ts
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE TS>
+<TS version="2.1">
+<context>
+    <name>UILinuxJoystickControls</name>
+    <message>
+        <source>Tracker settings</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Device</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Mapping</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Disabled</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #1</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #2</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #3</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #4</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #5</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #6</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #7</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Joystick axis #8</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>X</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Y</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Z</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Yaw</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Pitch</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Roll</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+<context>
+    <name>joystickDll</name>
+    <message>
+        <source>Linux Joystick input</source>
+        <translation type="unfinished"></translation>
+    </message>
+</context>
+</TS>
diff --git a/tracker-linux-joystick/linux_joystick.cpp b/tracker-linux-joystick/linux_joystick.cpp
new file mode 100644
index 00000000..3369a29e
--- /dev/null
+++ b/tracker-linux-joystick/linux_joystick.cpp
@@ -0,0 +1,65 @@
+#include "ftnoir_tracker_linux_joystick.h"
+
+#include <QDir>
+#include <QFileInfo>
+#include <QVariant>
+
+// Discovery is done by searching for devices in the sys file system.
+//
+// Given a path like this
+// /sys/devices/pci0000:00/0000:00:14.0/usb1/1-10/1-10:1.2/0003:2341:8036.0170/input/input380/js0
+// we want to get this part of the string 2341:8036, it will allow us to
+// identify the device in the future.
+// alternative way of doing this https://stackoverflow.com/questions/21173988/linux-attempting-to-get-joystick-vendor-and-product-ids-via-ioctl-get-einval-i
+std::tuple<QString, QString> sysfsDeviceToJsDev(QFileInfo device) {
+    using ret = std::tuple<QString, QString>;
+    QString symlink = device.symLinkTarget();
+    QString js_dev = QString("/dev/input/%1").arg(device.fileName());
+
+    QRegExp sep(QString("[:.%1]").arg(QDir::separator()));
+    QString device_id = symlink.section(sep, -6, -5);
+    return ret(js_dev, device_id);
+}
+
+QList<linux_joystick> getJoysticks()
+{
+    char name[128];
+    QList<linux_joystick> joysticks;
+
+    QDir dir("/sys/class/input/");
+    dir.setNameFilters({ "js*" });
+    QFileInfoList list = dir.entryInfoList();
+    for (int i = 0; i < list.size(); ++i)
+    {
+        QFileInfo device = list.at(i);
+        auto [js_dev, device_id] = sysfsDeviceToJsDev(device);
+        int iFile = open(js_dev.toUtf8().data(), O_RDONLY | O_NONBLOCK);
+        if (iFile == -1) continue;
+        if (ioctl(iFile, JSIOCGNAME(sizeof(name)), &name) > 0)
+        {
+            linux_joystick j;
+            j.name = name;
+            j.dev = js_dev;
+            j.device_id = device_id;
+            joysticks.append(j);
+        }
+        close(iFile);
+
+    }
+
+    return joysticks;
+}
+
+QString getJoystickDevice(QString guid) {
+    QDir dir("/sys/class/input/");
+    dir.setNameFilters({ "js*" });
+    QFileInfoList list = dir.entryInfoList();
+    for (int i = 0; i < list.size(); ++i)
+    {
+        QFileInfo device = list.at(i);
+        auto [js_dev, device_id] = sysfsDeviceToJsDev(device);
+        if (device_id == guid) return js_dev;
+    }
+
+    return NULL;
+}