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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtQuick3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "imagemanager.h"
#include "qatlas.h"
#include "filescanner.h"
#include "threadpool.h"
#include <QTime>
#include <QTimer>
#include <QDir>
ImageManager::ImageManager()
{
}
ImageManager::~ImageManager()
{
}
// INVARIANT: only ever called before the run() function is started
// therefore no need for synchronized url
void ImageManager::setImageBaseUrl(const QUrl &url)
{
Q_ASSERT(!isRunning());
m_url = url;
}
/*!
Stop the running threads if any, then sit waiting in the event loop
for a quit call.
*/
void ImageManager::stop()
{
emit stopAll();
}
void ImageManager::scanForFiles()
{
// TODO: In a real app there would be a way to detect new files arriving
// and trigger a rescan to pick these new files up. Here we just scan
// once and then destroy the scanner, to save on resources.
#ifndef QT_USE_TEST_IMAGES
// TODO: If the amount of files is large and the app is quit early the
// scanner could still be going when the threadpool quits. For now
// assume its ok...
FileScanner *scanner = new FileScanner;
scanner->setBaseUrl(m_url);
connect(scanner, SIGNAL(imageUrl(QUrl)), this, SIGNAL(imageUrl(QUrl)));
connect(scanner, SIGNAL(finished()), scanner, SLOT(deleteLater()));
connect(this, SIGNAL(stopAll()), scanner, SLOT(stop()));
scanner->start();
#else
QDir testImages(":/pictures");
QStringList pics = testImages.entryList();
for (int i = 0; i < pics.size(); ++i)
{
QUrl url;
url.setScheme("file");
url.setPath(testImages.filePath(pics.at(i)));
emit imageUrl(url);
}
qDebug() << "== test images loaded ==";
#endif
}
void ImageManager::quit()
{
QThread::quit();
}
void ImageManager::run()
{
if (m_url.scheme() != "file")
{
qWarning("URL scheme %s not yet supported", qPrintable(m_url.scheme()));
return;
}
// execute once in the event loop below
QTimer::singleShot(0, this, SLOT(scanForFiles()));
#ifndef QT_NO_THREADED_FILE_LOAD
ThreadPool pool;
connect(this, SIGNAL(deployLoader(ThumbnailableImage)),
&pool, SLOT(deployLoader(ThumbnailableImage)));
connect(this, SIGNAL(stopAll()), &pool, SLOT(stop()));
connect(&pool, SIGNAL(stopped()), this, SLOT(quit()));
#endif
exec();
}
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