Make the WindowWrapper a PropertyOwner and add SGCT properties to the subclass (closes #260)

include/openspace/engine/settingsengine.h

@@ -50,7 +50,6 @@ public:
     bool useDoubleBuffering();
 
 private:
-    properties::FloatProperty _eyeSeparation;
     properties::OptionProperty _scenes;
     properties::BoolProperty _busyWaitForDecode;
     properties::BoolProperty _logSGCTOutOfOrderErrors;

include/openspace/engine/wrapper/sgctwindowwrapper.h

@@ -27,6 +27,9 @@
 
 #include <openspace/engine/wrapper/windowwrapper.h>
 
+#include <openspace/properties/scalar/boolproperty.h>
+#include <openspace/properties/scalar/floatproperty.h>
+
 namespace openspace {
 
 /**
@@ -36,6 +39,8 @@ namespace openspace {
  */
 class SGCTWindowWrapper : public WindowWrapper {
 public:
+    SGCTWindowWrapper();
+
     void terminate() override;
     void setBarrier(bool enabled) override;
     void setSynchronization(bool enabled) override;
@@ -72,6 +77,10 @@ public:
     bool isSimpleRendering() const override;
 
     void takeScreenshot(bool applyWarping = false) const override;
+
+private:
+    properties::FloatProperty _eyeSeparation;
+    properties::BoolProperty _showStatsGraph;
 };
 
 } // namespace openspace

include/openspace/engine/wrapper/windowwrapper.h

@@ -25,6 +25,8 @@
 #ifndef __OPENSPACE_CORE___WINDOWWRAPPER___H__
 #define __OPENSPACE_CORE___WINDOWWRAPPER___H__
 
+#include <openspace/properties/propertyowner.h>
+
 #include <ghoul/glm.h>
 #include <ghoul/misc/exception.h>
 
@@ -42,8 +44,11 @@ namespace scripting { struct LuaLibrary; }
  * Every new windowing framework needs to have its own WindowWrapper subclass exposing the
  * required features.
  */
-class WindowWrapper {
+class WindowWrapper : public properties::PropertyOwner {
 public:
+    /// Default constructor
+    WindowWrapper();
+
     /**
     * Returns the Lua library that contains all Lua functions available to affect the
     * windowing system.