windowimpfactory.cpp

自己编写的关于设计模式中的桥模式的应用例子

#include "StdAfx.h"
#include "WindowImpFactory.h"

WindowImpFactory* WindowImpFactory::_instance =NULL;

WindowImpFactory::WindowImpFactory(void)
{

}

WindowImpFactory::~WindowImpFactory(void)
{

}

WindowImpFactory* WindowImpFactory::GetInstance()
{
  if(_instance ==NULL)
  {
    _instance = new WindowImpFactory();
  }

  return _instance;
}

WindowImp* WindowImpFactory::CreateWindowImp()
{
  if(num ==1)
  {
    return new PMWindowImp();
  }

  if(num ==2)
	   return new XWindowImp();

  return NULL;


}