add initial examples, replacing the 'Demos/Demos3'. Will make it work cross-platform, OpenGL3/OpenGL2 and add more examples to it.

examples/ExampleBrowser/GwenGUISupport/gwenUserInterface.h

@@ -0,0 +1,63 @@
+#ifndef _GWEN_USER_INTERFACE_H
+#define _GWEN_USER_INTERFACE_H
+
+struct GwenInternalData;
+
+typedef void (*b3ComboBoxCallback) (int combobox, const char* item);
+typedef void (*b3ToggleButtonCallback)(int button, int state);
+typedef void (*b3FileOpenCallback)();
+
+namespace Gwen
+{
+	namespace Renderer
+	{
+		class Base;
+	};
+};
+class GwenUserInterface
+{
+	GwenInternalData*	m_data;
+
+	public:
+		
+		GwenUserInterface();
+		
+		virtual ~GwenUserInterface();
+		
+		void	init(int width, int height,Gwen::Renderer::Base* gwenRenderer,float retinaScale);
+		void	setFocus();
+		void	forceUpdateScrollBars();
+		
+		void	draw(int width, int height);
+
+		void	resize(int width, int height);
+				
+		bool	mouseMoveCallback( float x, float y);
+		bool	mouseButtonCallback(int button, int state, float x, float y);
+		bool	keyboardCallback(int key, int state);
+
+
+		void	setToggleButtonCallback(b3ToggleButtonCallback callback);
+		b3ToggleButtonCallback getToggleButtonCallback();
+
+		void	registerToggleButton(int buttonId, const char* name);
+
+		void	setComboBoxCallback(b3ComboBoxCallback callback);
+		b3ComboBoxCallback getComboBoxCallback();
+		void	registerComboBox(int buttonId, int numItems, const char** items, int startItem = 0);
+		
+		void	setStatusBarMessage(const char* message, bool isLeft=true);
+
+        void    registerFileOpenCallback(b3FileOpenCallback callback);
+    
+		GwenInternalData* getInternalData()
+		{
+			return m_data;
+		}
+
+};
+
+
+
+#endif //_GWEN_USER_INTERFACE_H
+