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/***************************************************************************
UndoManager.cpp - manager class for undo/redo handling
-------------------
begin : Sat Feb 01 2014
copyright : (C) 2014 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it 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. *
* *
***************************************************************************/
#include "config.h"
#include "libkwave/undo/UndoHandler.h"
#include "libkwave/undo/UndoManager.h"
//***************************************************************************
Kwave::UndoManager::UndoManager()
:m_handlers()
{
}
//***************************************************************************
Kwave::UndoManager::~UndoManager()
{
m_handlers.clear();
}
//***************************************************************************
bool Kwave::UndoManager::registerHandler(Kwave::UndoHandler *handler)
{
if (!handler) return false;
if (m_handlers.contains(handler)) return false;
m_handlers.append(handler);
return true;
}
//***************************************************************************
bool Kwave::UndoManager::unregisterHandler(Kwave::UndoHandler *handler)
{
if (!handler) return false;
if (!m_handlers.contains(handler)) return false;
m_handlers.removeAll(handler);
return true;
}
//***************************************************************************
bool Kwave::UndoManager::startUndoTransaction(
Kwave::UndoTransaction *transaction)
{
if (!transaction) return false;
foreach (Kwave::UndoHandler *handler, m_handlers) {
Q_ASSERT(handler);
if (!handler) continue;
if (!(handler->saveUndoData(*transaction)))
return false;
}
return true;
}
//***************************************************************************
bool Kwave::UndoManager::closeUndoTransaction(
Kwave::UndoTransaction *transaction)
{
Q_UNUSED(transaction)
return true;
}
//***************************************************************************
//***************************************************************************
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