From 0c4cd96bfddd85c2587f56821043635a46b169b0 Mon Sep 17 00:00:00 2001
From: volansystech <samir.thaker@volansys.com>
Date: Wed, 24 May 2017 12:25:21 +0530
Subject: [PATCH] Initial Commit : Switch from HMD [Oculus Rift] mode to
 Desktop mode automatically when user removing Oculus Rift.

---
 interface/src/Application.cpp | 40 +++++++++++++++++++++++++++++++++++
 interface/src/Application.h   |  8 +++++--
 2 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index ae490c05e7..ced5e51565 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -1338,6 +1338,13 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer, bo
         properties["active_display_plugin"] = getActiveDisplayPlugin()->getName();
         properties["using_hmd"] = isHMDMode();
 
+		if (isOculusRiftPluginAvailable()){
+			qCDebug(interfaceapp) << "Oculus Rift Plugin is available";
+			QTimer *switchModeTimer = new QTimer(this);
+			connect(switchModeTimer, SIGNAL(timeout()), this, SLOT(switchmode()));
+			switchModeTimer->start(500);
+		}
+
         auto glInfo = getGLContextData();
         properties["gl_info"] = glInfo;
         properties["gpu_used_memory"] = (int)BYTES_TO_MB(gpu::Context::getUsedGPUMemory());
@@ -6833,6 +6840,39 @@ void Application::updateDisplayMode() {
     Q_ASSERT_X(_displayPlugin, "Application::updateDisplayMode", "could not find an activated display plugin");
 }
 
+bool Application::isOculusRiftPluginAvailable(){
+	bool isOculusRiftPluginAvailable = false;
+	auto displayPlugins = PluginManager::getInstance()->getDisplayPlugins();
+	// Default to the first item on the list, in case none of the menu items match
+	DisplayPluginPointer defaultplugin = displayPlugins.at(0);
+	if (defaultplugin->isHmd() && defaultplugin->getName() == "Oculus Rift"){
+		oculusRiftPlugin = defaultplugin;
+		return true; // No need to iterate again,so return
+	}
+	// Iterate to check If Oculus Rift Plugin is available
+	foreach(DisplayPluginPointer displayPlugin, PluginManager::getInstance()->getDisplayPlugins()) {
+		QString pluginname = displayPlugin->getName();
+		if (displayPlugin->isHmd() && pluginname == "Oculus Rift") {
+			oculusRiftPlugin = displayPlugin;
+			_isDisplayVisible = displayPlugin->isDisplayVisible();
+			isOculusRiftPluginAvailable = true;
+			break;
+		}
+	}
+	return isOculusRiftPluginAvailable;
+}
+
+void Application::switchmode(){
+	bool isDisplayVisible = oculusRiftPlugin->isDisplayVisible();
+	if (isDisplayVisible != _isDisplayVisible){
+		if (isDisplayVisible == false && _isDisplayVisible == true){
+			qCDebug(interfaceapp) << "switching from HMD to desktop mode";
+			setActiveDisplayPlugin("Desktop");
+		}
+	}
+	_isDisplayVisible = isDisplayVisible; // assign current status
+}
+
 mat4 Application::getEyeProjection(int eye) const {
     QMutexLocker viewLocker(&_viewMutex);
     if (isHMDMode()) {
diff --git a/interface/src/Application.h b/interface/src/Application.h
index d9dc3f389f..c181e74c74 100644
--- a/interface/src/Application.h
+++ b/interface/src/Application.h
@@ -152,7 +152,7 @@ public:
     void paintGL();
     void resizeGL();
 
-    bool event(QEvent* event) override;
+	bool event(QEvent* event) override;
     bool eventFilter(QObject* object, QEvent* event) override;
 
     glm::uvec2 getCanvasSize() const;
@@ -443,7 +443,7 @@ private slots:
     void addAssetToWorldErrorTimeout();
 
     void handleSandboxStatus(QNetworkReply* reply);
-
+	void switchmode();
 private:
     static void initDisplay();
     void init();
@@ -683,6 +683,10 @@ private:
     FileScriptingInterface* _fileDownload;
     AudioInjector* _snapshotSoundInjector { nullptr };
     SharedSoundPointer _snapshotSound;
+	
+	bool isOculusRiftPluginAvailable();
+	DisplayPluginPointer oculusRiftPlugin;
+	bool _isDisplayVisible;
 };