juce_ChangeListenerList.h

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/*
  ==============================================================================

   This file is part of the JUCE library - "Jules' Utility Class Extensions"
   Copyright 2004-7 by Raw Material Software ltd.

  ------------------------------------------------------------------------------

   JUCE can be redistributed and/or modified under the terms of the
   GNU General Public License, as published by the Free Software Foundation;
   either version 2 of the License, or (at your option) any later version.

   JUCE is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with JUCE; if not, visit www.gnu.org/licenses or write to the
   Free Software Foundation, Inc., 59 Temple Place, Suite 330,
   Boston, MA 02111-1307 USA

  ------------------------------------------------------------------------------

   If you'd like to release a closed-source product which uses JUCE, commercial
   licenses are also available: visit www.rawmaterialsoftware.com/juce for
   more information.

  ==============================================================================
*/

#ifndef __JUCE_CHANGELISTENERLIST_JUCEHEADER__
#define __JUCE_CHANGELISTENERLIST_JUCEHEADER__

#include "juce_ChangeListener.h"
#include "juce_MessageListener.h"
#include "../../juce_core/containers/juce_SortedSet.h"
#include "../../juce_core/threads/juce_ScopedLock.h"


//==============================================================================
class JUCE_API  ChangeListenerList  : public MessageListener
{
public:
    //==============================================================================
    ChangeListenerList() throw();

    ~ChangeListenerList() throw();

    //==============================================================================
    void addChangeListener (ChangeListener* const listener) throw();

    void removeChangeListener (ChangeListener* const listener) throw();

    void removeAllChangeListeners() throw();

    //==============================================================================
    void sendChangeMessage (void* objectThatHasChanged) throw();

    void sendSynchronousChangeMessage (void* objectThatHasChanged);

    void dispatchPendingMessages();

    //==============================================================================
    void handleMessage (const Message&);

    juce_UseDebuggingNewOperator

private:
    SortedSet <void*> listeners;
    CriticalSection lock;
    void* lastChangedObject;
    bool messagePending;

    ChangeListenerList (const ChangeListenerList&);
    const ChangeListenerList& operator= (const ChangeListenerList&);
};


#endif   // __JUCE_CHANGELISTENERLIST_JUCEHEADER__