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113 lines
3 KiB
C++
113 lines
3 KiB
C++
/*
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* Copyright (C) 2007 Tobias Koenig <tokoe@kde.org>
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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 Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "cachedprovider.h"
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#include <QtCore/QFile>
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#include <QtCore/QFileInfo>
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#include <QtCore/QTimer>
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#include <QtCore/QThreadPool>
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#include <QtGui/QImage>
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#include <QtGui/QImageWriter>
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#include <kdebug.h>
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#include <kstandarddirs.h>
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static const QByteArray imageFormat = QImageWriter::defaultImageFormat();
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LoadImageThread::LoadImageThread(const QString &filePath)
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: m_filePath(filePath)
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{
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}
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void LoadImageThread::run()
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{
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QImage image;
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image.load(m_filePath, imageFormat);
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emit done(image);
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}
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SaveImageThread::SaveImageThread(const QString &identifier, const QImage &image)
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: m_image(image),
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m_identifier(identifier)
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{
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}
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void SaveImageThread::run()
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{
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const QString path = CachedProvider::identifierToPath( m_identifier );
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m_image.save(path, imageFormat);
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emit done( m_identifier, path, m_image );
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}
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QString CachedProvider::identifierToPath( const QString &identifier )
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{
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const QString dataDir = KStandardDirs::locateLocal( "cache", QLatin1String("plasma_engine_podt/") );
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return QString( dataDir + identifier );
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}
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CachedProvider::CachedProvider( const QString &identifier, QObject *parent )
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: PotdProvider( parent ), mIdentifier( identifier )
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{
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LoadImageThread *thread = new LoadImageThread( identifierToPath( mIdentifier ) );
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connect(thread, SIGNAL(done(QImage)), this, SLOT(triggerFinished(QImage)));
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QThreadPool::globalInstance()->start(thread);
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}
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CachedProvider::~CachedProvider()
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{
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}
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QImage CachedProvider::image() const
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{
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return mImage;
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}
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QString CachedProvider::identifier() const
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{
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return mIdentifier;
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}
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void CachedProvider::triggerFinished(const QImage &image)
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{
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mImage = image;
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emit finished( this );
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}
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bool CachedProvider::isCached( const QString &identifier, bool ignoreAge )
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{
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const QString path = identifierToPath( identifier );
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if (!QFile::exists( path ) ) {
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return false;
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}
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if (!ignoreAge && !identifier.contains( ':' ) ) {
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// no date in the identifier, so it's a daily; check to see ifthe modification time is today
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QFileInfo info( path );
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if ( info.lastModified().daysTo( QDateTime::currentDateTime() ) > 1 ) {
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return false;
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}
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}
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return true;
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}
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#include "moc_cachedprovider.cpp"
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