New Session class to contain the list of sources. Loading and Saving of

session files in XML. Verified deletion of Nodes, Groups and Sources.

View.h

@@ -10,20 +10,26 @@ class Source;
 class View
 {
 public:
-    View();
 
     typedef enum {RENDERING = 0, MIXING=1, GEOMETRY=2, LAYER=3, INVALID=4 } Mode;
 
+    View(Mode m);
+    inline Mode mode() const { return mode_; }
+
     virtual void update (float dt);
     virtual void draw () = 0;
     virtual void zoom (float) {}
     virtual void drag (glm::vec2, glm::vec2) {}
     virtual void grab (glm::vec2, glm::vec2, Source*) {}
 
+    virtual void restoreDefaultSettings();
+    virtual void setCurrentSettingsAsDefault();
+
     Scene scene;
 
 protected:
-    Group backgound_;
+    Mode mode_;
+    Group *backgound_;
 };
 
 
@@ -55,7 +61,6 @@ public:
     void setResolution (uint width, uint height);
     inline FrameBuffer *frameBuffer () const { return frame_buffer_; }
 
-
 };
 
 class GeometryView : public View