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104 lines
3.0 KiB
104 lines
3.0 KiB
14 years ago
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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Qt Software Information (qt-info@nokia.com)
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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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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain
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** additional rights. These rights are described in the Nokia Qt LGPL
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** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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** package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at qt-sales@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "UBAutoSaver.h"
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#include <QtCore>
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#define AUTOSAVE_IN 1000 * 3 // seconds
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#define MAXWAIT 1000 * 15 // seconds
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UBAutoSaver::UBAutoSaver(QObject *parent) : QObject(parent)
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{
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Q_ASSERT(parent);
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}
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UBAutoSaver::~UBAutoSaver()
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{
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if (mTimer.isActive())
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qWarning() << "AutoSaver: still active when destroyed, changes not saved.";
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}
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void UBAutoSaver::changeOccurred()
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{
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if (mFirstChange.isNull())
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mFirstChange.start();
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if (mFirstChange.elapsed() > MAXWAIT)
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{
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saveIfNeccessary();
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} else {
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mTimer.start(AUTOSAVE_IN, this);
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}
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}
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void UBAutoSaver::timerEvent(QTimerEvent *event)
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{
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if (event->timerId() == mTimer.timerId())
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{
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saveIfNeccessary();
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}
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else
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{
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QObject::timerEvent(event);
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}
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}
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void UBAutoSaver::saveIfNeccessary()
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{
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if (!mTimer.isActive())
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return;
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mTimer.stop();
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mFirstChange = QTime();
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if (!QMetaObject::invokeMethod(parent(), "save", Qt::DirectConnection))
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{
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qWarning() << "AutoSaver: error invoking slot save() on parent";
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}
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}
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