//
//  DemoContext.h
//  MacOSX-Framework
//
//  Created by John Ryland on 1/10/17.
//  Copyright © 2017 John Ryland. All rights reserved.
//

#ifndef DemoContext_h
#define DemoContext_h


#include "Common.h"


class DemoContext
{
public:
  virtual ~DemoContext() {}
  virtual void prepare() {}
  virtual void update(float a_seconds) {}
  virtual void draw() {}

  virtual void onClose() {}
  virtual void onResize(const vec2f& a_shape) {}
  virtual void onMouseUp(const MouseEvent& a_event) {}
  virtual void onMouseDown(const MouseEvent& a_event) {}
  virtual void onMouseMove(const MouseEvent& a_event) {}
  
  bool m_needsPrepare = false;
};


// TODO: return shared_ptr instead of raw pointer
typedef DemoContext* (*DemoContextFactory)();
using DemoContextFactoryItem = GenericFactoryItem<DemoContextFactory>;


template <typename T>
struct RegisterDemoContext
{
    RegisterDemoContext(const char* demoName) : registrationItem(demoName, createDemo) { }
    static DemoContext* createDemo() { return new T; }
    DemoContextFactoryItem registrationItem;
};


// This can go in the header or cpp file, doesn't matter
#define REGISTER_DEMO_CONTEXT(demoName, demoClass) \
    RegisterDemoContext<demoClass> register##demoClass(demoName);


#endif /* DemoContext_h */