SbEventHandler.h

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/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
 ***              AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT.                     ***
 ***                                                                                ***
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 ***                        BORDEAUX, FRANCE                                        ***
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**=======================================================================*/
/*=======================================================================
** Author      : Thibaut Andrieu (Mar 2015)
**=======================================================================*/
 
#ifndef  _SB_EVENTHANDLER_H_
#define  _SB_EVENTHANDLER_H_
 
#include <Inventor/SbDelegate.h>
 
template <typename ArgType>
class SbEventHandler
{
public:
 
  void operator()(ArgType arg)
  {
    //Copy the delegate vector because the called function may change the vector
    DelegateVector delegateCopy = m_delegates;
    typename DelegateVector::const_iterator it = delegateCopy.begin();
    typename DelegateVector::const_iterator end = delegateCopy.end();
    while ( it != end )
    {
      (*it)(arg);
      ++it;
    }
  }
 
  void add(void (*f)(ArgType))
  { 
    inventor::helper::SbDelegate<void, ArgType> delegate = inventor::helper::SbDelegate<void, ArgType>(f);
    m_delegates.push_back(delegate); 
  }
 
  template <typename ClassType>
  void add(ClassType& a, void (ClassType::*f)(ArgType))
  { 
    inventor::helper::SbDelegate<void, ArgType> delegate = inventor::helper::SbDelegate<void, ArgType>(a, f);
    m_delegates.push_back(delegate); 
  }
 
  bool remove(void (*f)(ArgType))
  {
    for ( typename DelegateVector::iterator itDelegate = m_delegates.begin(); itDelegate != m_delegates.end(); itDelegate++ )
    {
      if ( itDelegate->equal(f) )
      {
        m_delegates.erase(itDelegate);
        return true;
      }
    }
    return false;
  }
 
  template <typename ClassType>
  bool remove(ClassType& a, void (ClassType::*f)(ArgType))
  {
    for ( typename DelegateVector::iterator itDelegate = m_delegates.begin(); itDelegate != m_delegates.end(); itDelegate++ )
    {
      if ( itDelegate->equal(a, f) )
      {
        m_delegates.erase(itDelegate);
        return true;
      }
    }
    return false;
  }
 
private:
 
  typedef std::vector< inventor::helper::SbDelegate<void, ArgType> > DelegateVector;
  DelegateVector m_delegates;
};
 
#endif // _SB_EVENTHANDLER_H_