119 lines
4.1 KiB
C++
119 lines
4.1 KiB
C++
/*
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* Copyright 2008 Benjamin C. Meyer <ben@meyerhome.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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/****************************************************************************
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**
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** Copyright (C) 2007-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** This file may be used under the terms of the GNU General Public
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** License versions 2.0 or 3.0 as published by the Free Software
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** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Alternatively you may (at
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** your option) use any later version of the GNU General Public
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** License if such license has been publicly approved by Trolltech ASA
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** (or its successors, if any) and the KDE Free Qt Foundation. In
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** addition, as a special exception, Trolltech gives you certain
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** additional rights. These rights are described in the Trolltech GPL
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** Exception version 1.2, which can be found at
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** http://www.trolltech.com/products/qt/gplexception/ and in the file
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** GPL_EXCEPTION.txt in this package.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
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** you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** In addition, as a special exception, Trolltech, as the sole
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** copyright holder for Qt Designer, grants users of the Qt/Eclipse
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** Integration plug-in the right for the Qt/Eclipse Integration to
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** link to functionality provided by Qt Designer and its related
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** libraries.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
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** granted herein.
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**
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**
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****************************************************************************/
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#include "autosaver.h"
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#include <qdir.h>
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#include <qcoreapplication.h>
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#include <qmetaobject.h>
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#include <qdebug.h>
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#define AUTOSAVE_IN 1000 * 3 // seconds
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#define MAXWAIT 1000 * 15 // seconds
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AutoSaver::AutoSaver(QObject *parent) : QObject(parent)
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{
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Q_ASSERT(parent);
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}
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AutoSaver::~AutoSaver()
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{
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if (m_timer.isActive()) {
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qWarning() << "AutoSaver: still active when destroyed, changes not saved.";
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if (parent() && parent()->metaObject())
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qWarning() << parent() << parent()->metaObject()->className() << "should call saveIfNeccessary";
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}
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}
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void AutoSaver::changeOccurred()
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{
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if (m_firstChange.isNull())
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m_firstChange.start();
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if (m_firstChange.elapsed() > MAXWAIT) {
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saveIfNeccessary();
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} else {
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m_timer.start(AUTOSAVE_IN, this);
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}
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}
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void AutoSaver::timerEvent(QTimerEvent *event)
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{
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if (event->timerId() == m_timer.timerId()) {
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saveIfNeccessary();
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} else {
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QObject::timerEvent(event);
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}
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}
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void AutoSaver::saveIfNeccessary()
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{
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if (!m_timer.isActive())
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return;
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m_timer.stop();
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m_firstChange = QTime();
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if (!QMetaObject::invokeMethod(parent(), "save", Qt::DirectConnection)) {
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qWarning() << "AutoSaver: error invoking slot save() on parent";
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}
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}
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