kdsignalblocker.cpp

/****************************************************************************
** Copyright (C) 2001-2012 Klaralvdalens Datakonsult AB.  All rights reserved.
**
** This file is part of the KD Tools library.
**
** Licensees holding valid commercial KD Tools licenses may use this file in
** accordance with the KD Tools Commercial License Agreement provided with
** the Software.
**
**
** This file may be distributed and/or modified under the terms of the GNU
** Lesser General Public License version 2 and version 3 as published by the
** Free Software Foundation and appearing in the file LICENSE.LGPL included.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** Contact info@kdab.net if any conditions of this licensing are not
** clear to you.
**
**********************************************************************/

#include "kdsignalblocker.h"

#include <QObject>

using namespace Akonadi;

KDSignalBlocker::KDSignalBlocker( QObject * o )
    : wasBlocked( o->signalsBlocked() ), object( o )
{
    o->blockSignals( true );
}

KDSignalBlocker::KDSignalBlocker( QObject & o )
    : wasBlocked( o.signalsBlocked() ), object( &o )
{
    o.blockSignals( true );
}

KDSignalBlocker::~KDSignalBlocker()
{
    unblock();
}

/*
  Unblocks signals (unless they were blocked before).
  You can use reblock() to block them again.
  There is no need to reblock before destruction.

  \post o->signalsBlocked() is the same as just before this instance has been constructed.
*/
void KDSignalBlocker::unblock()
{
    object->blockSignals( wasBlocked );
}

/*
  Unblocks signals (unless they were blocked before)
  \post o->signalsBlocked() is the same as just before this instance has been constructed.
*/
void KDSignalBlocker::reblock()
{
    object->blockSignals( true );
}