File indexing completed on 2024-05-19 04:49:41

 /****************************************************************************************
  * Copyright (c) 2011 Ralf Engels <ralf-engels@gmx.de>                                  *
  *                                                                                      *
  * This program is free software; you can redistribute it and/or modify it under        *
  * the terms of the GNU General Public License as published by the Free Software        *
  * Foundation; either version 2 of the License, or (at your option) version 3 or        *
  * any later version accepted by the membership of KDE e.V. (or its successor approved  *
  * by the membership of KDE e.V.), which shall act as a proxy defined in Section 14 of  *
  * version 3 of the license.                                                            *
  *                                                                                      *
  * This program is distributed in the hope that it will be useful, but WITHOUT ANY      *
  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A      *
  * PARTICULAR PURPOSE. See the GNU General Public License for more details.             *
  *                                                                                      *
  * You should have received a copy of the GNU General Public License along with         *
  * this program.  If not, see <http://www.gnu.org/licenses/>.                           *
  ****************************************************************************************/
 
 #ifndef AMAROK_QUIZPLAY_BIAS_H
 #define AMAROK_QUIZPLAY_BIAS_H
 
 #include "dynamic/BiasFactory.h"
 #include "dynamic/biases/TagMatchBias.h"
 #include "widgets/MetaQueryWidget.h"
 
 namespace Dynamic
 {
     /** This bias will pick tracks that start with a character that the last track ended with. */
     class QuizPlayBias : public SimpleMatchBias
     {
         Q_OBJECT
 
         public:
             enum FollowType
             {
                 TitleToTitle,
                 ArtistToArtist,
                 AlbumToAlbum
             };
 
             QuizPlayBias();
 
             void fromXml( QXmlStreamReader *reader ) override;
             void toXml( QXmlStreamWriter *writer ) const override;
 
             static QString sName();
             QString name() const override;
             QString toString() const override;
 
             QWidget* widget( QWidget* parent = nullptr ) override;
 
             TrackSet matchingTracks( const Meta::TrackList& playlist,
                                              int contextCount, int finalCount,
                                              const TrackCollectionPtr &universe ) const override;
 
             bool trackMatches( int position,
                                        const Meta::TrackList& playlist,
                                        int contextCount ) const override;
 
             FollowType follow() const;
             void setFollow( FollowType value );
 
         public Q_SLOTS:
             void updateFinished() override;
             void invalidate() override;
 
         protected Q_SLOTS:
             void selectionChanged( int );
             void newQuery() override;
 
         protected:
             /** A smart function to compute the last character in the string.
                 It ignores braces and CD texts. */
             static QChar lastChar( const QString &str );
             static QString nameForFollow( FollowType match );
             static FollowType followForName( const QString &name );
 
             FollowType m_follow;
 
             mutable QChar m_currentCharacter;
             mutable QHash< QChar, TrackSet > m_characterTrackMap;
 
         private:
             Q_DISABLE_COPY(QuizPlayBias)
     };
 
 
     class AMAROK_EXPORT QuizPlayBiasFactory : public Dynamic::AbstractBiasFactory
     {
         public:
             QString i18nName() const override;
             QString name() const override;
             QString i18nDescription() const override;
             BiasPtr createBias() override;
     };
 
 }
 
 #endif