added Plugin interface to ViveControllerManager

mostly I just added this to add the isSupported method, so it wouldn't
attempt to initialize if there was no HMD attached.

interface/src/Application.cpp

@@ -669,8 +669,11 @@ Application::Application(int& argc, char** argv, QElapsedTimer &startup_time) :
     ddeTracker->init();
     connect(ddeTracker.data(), &FaceTracker::muteToggled, this, &Application::faceTrackerMuteToggled);
 #endif
-    
-    ViveControllerManager::getInstance().activate();
+
+    ViveControllerManager::getInstance().init();
+    if (ViveControllerManager::getInstance().isSupported()) {
+        ViveControllerManager::getInstance().activate();
+    }
 
     _oldHandMouseX[0] = -1;
     _oldHandMouseY[0] = -1;

interface/src/devices/SixenseManager.cpp

@@ -481,6 +481,7 @@ void SixenseManager::handleButtonEvent(unsigned int buttons, int index) {
 }
 
 void SixenseManager::handlePoseEvent(glm::vec3 position, glm::quat rotation, int index) {
+#if HAS_SIXENSE
     // Transform the measured position into body frame.
     glm::vec3 neck = _neckBase;
     // Zeroing y component of the "neck" effectively raises the measured position a little bit.
@@ -538,6 +539,7 @@ void SixenseManager::handlePoseEvent(glm::vec3 position, glm::quat rotation, int
 //    palm->setTipPosition(newTipPosition);
     
     _poseStateMap[makeInput(JointChannel(index)).getChannel()] = UserInputMapper::PoseValue(position, rotation);
+#endif
 }
 
 void SixenseManager::registerToUserInputMapper(UserInputMapper& mapper) {

libraries/input-plugins/src/input-plugins/ViveControllerManager.cpp

@@ -21,6 +21,8 @@
 Q_DECLARE_LOGGING_CATEGORY(inputplugins)
 Q_LOGGING_CATEGORY(inputplugins, "hifi.inputplugins")
 
+const QString ViveControllerManager::NAME("OpenVR (Vive) Hand Controllers");
+
 extern vr::IVRSystem *_hmd;
 extern vr::TrackedDevicePose_t _trackedDevicePose[vr::k_unMaxTrackedDeviceCount];
 extern mat4 _trackedDevicePoseMat4[vr::k_unMaxTrackedDeviceCount];
@@ -55,6 +57,40 @@ ViveControllerManager::~ViveControllerManager() {
 
 }
 
+const QString& ViveControllerManager::getName() const {
+    return NAME;
+}
+
+bool ViveControllerManager::isSupported() const {
+    return vr::VR_IsHmdPresent();
+}
+
+void ViveControllerManager::init() {
+    ;
+}
+
+void ViveControllerManager::deinit() {
+    ;
+}
+
+void ViveControllerManager::activate(PluginContainer * container) {
+    activate();
+}
+
+/// Called when a plugin is no longer being used.  May be called multiple times.
+void ViveControllerManager::deactivate() {
+    ;
+}
+
+/**
+ * Called by the application during it's idle phase.  If the plugin needs to do
+ * CPU intensive work, it should launch a thread for that, rather than trying to
+ * do long operations in the idle call
+ */
+void ViveControllerManager::idle() {
+    update();
+}
+
 void ViveControllerManager::activate() {
     if (!_hmd) {
         vr::HmdError eError = vr::HmdError_None;

libraries/input-plugins/src/input-plugins/ViveControllerManager.h

@@ -18,11 +18,30 @@
 #include <GLMHelpers.h>
 
 #include "UserInputMapper.h"
+#include "plugins/Plugin.h"
 
-class ViveControllerManager : public QObject {
-    Q_OBJECT
-    
+class ViveControllerManager : public Plugin {
 public:
+    virtual const QString& getName() const override;
+    virtual bool isSupported() const override;
+
+    /// Called when plugin is initially loaded, typically at application start
+    virtual void init() override;
+    /// Called when application is shutting down
+    virtual void deinit() override ;
+
+    /// Called when a plugin is being activated for use.  May be called multiple times.
+    virtual void activate(PluginContainer * container) override;
+    /// Called when a plugin is no longer being used.  May be called multiple times.
+    virtual void deactivate() override;
+
+    /**
+     * Called by the application during it's idle phase.  If the plugin needs to do
+     * CPU intensive work, it should launch a thread for that, rather than trying to
+     * do long operations in the idle call
+     */
+    virtual void idle() override;
+
     enum JoystickAxisChannel {
         AXIS_Y_POS = 1U << 1,
         AXIS_Y_NEG = 1U << 2,
@@ -78,7 +97,9 @@ private:
     bool _isInitialized;
     bool _isEnabled;
     int _trackedControllers;
-    
+
+    static const QString NAME;
+
 protected:
     int _deviceID = 0;