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NepomukDaemons

folder.h

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00001 /* 
00002    Copyright (c) 2008 Sebastian Trueg <trueg@kde.org>
00003 
00004    This library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Library General Public
00006    License version 2 as published by the Free Software Foundation.
00007 
00008    This library is distributed in the hope that it will be useful,
00009    but WITHOUT ANY WARRANTY; without even the implied warranty of
00010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011    Library General Public License for more details.
00012 
00013    You should have received a copy of the GNU Library General Public License
00014    along with this library; see the file COPYING.LIB.  If not, write to
00015    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00016    Boston, MA 02110-1301, USA.
00017 */
00018 
00019 #ifndef _NEPOMUK_VIRTUAL_FOLDER_H_
00020 #define _NEPOMUK_VIRTUAL_FOLDER_H_
00021 
00022 #include <QtCore/QObject>
00023 
00024 #include "result.h"
00025 #include "query.h"
00026 #include "searchcore.h"
00027 
00028 #include <QtCore/QHash>
00029 #include <QtCore/QTimer>
00030 
00031 
00032 namespace Nepomuk {
00033     namespace Search {
00034 
00035         class Query;
00036         class FolderConnection;
00037 
00043         class Folder : public QObject
00044         {
00045             Q_OBJECT
00046 
00047         public:
00048             Folder( const Query& query, QObject* parent = 0 );
00049             ~Folder();
00050 
00056             QList<Result> entries() const;
00057 
00062             bool initialListingDone() const;
00063 
00064             QList<FolderConnection*> openConnections() const;
00065 
00066         public Q_SLOTS:
00067             void update();
00068 
00069         Q_SIGNALS:
00070             void newEntries( const QList<Nepomuk::Search::Result>& entries );
00071             void entriesRemoved( const QList<QUrl>& entries );
00072             void finishedListing();
00073 
00074         private Q_SLOTS:
00075             void slotSearchNewResult( const Nepomuk::Search::Result& );
00076             void slotSearchScoreChanged( const Nepomuk::Search::Result& );
00077             void slotSearchFinished();
00078             void slotStorageChanged();
00079             void slotUpdateTimeout();
00080 
00081         private:
00085             void addConnection( FolderConnection* );
00086 
00090             void removeConnection( FolderConnection* );
00091 
00092             Query m_query;
00093             QList<FolderConnection*> m_connections;
00094 
00095             bool m_initialListingDone;
00096             QHash<QUrl, Result> m_results;    // the actual current results
00097             QHash<QUrl, Result> m_newResults; // the results gathered during an update, needed to find removed items
00098 
00099             SearchCore* m_searchCore;
00100 
00101             bool m_storageChanged;            // did the nepomuk store change after the last update
00102             QTimer m_updateTimer;             // used to ensure that we do not update all the time if the storage changes a lot
00103 
00104             friend class FolderConnection;    // for addConnection and removeConnection
00105         };
00106     }
00107 }
00108 
00109 #endif

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