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0001 /**************************************************************************************** 0002 * Copyright (c) 2013 Matěj Laitl <matej@laitl.cz> * 0003 * * 0004 * This program is free software; you can redistribute it and/or modify it under * 0005 * the terms of the GNU General Public License as published by the Free Software * 0006 * Foundation; either version 2 of the License, or (at your option) any later * 0007 * version. * 0008 * * 0009 * This program is distributed in the hope that it will be useful, but WITHOUT ANY * 0010 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A * 0011 * PARTICULAR PURPOSE. See the GNU General Public License for more details. * 0012 * * 0013 * You should have received a copy of the GNU General Public License along with * 0014 * this program. If not, see <http://www.gnu.org/licenses/>. * 0015 * **************************************************************************************/ 0016 0017 #ifndef FADEOUTER_H 0018 #define FADEOUTER_H 0019 0020 #include <amarok_export.h> 0021 0022 #include <QObject> 0023 #include <QPointer> 0024 0025 namespace Phonon { 0026 class MediaObject; 0027 class VolumeFaderEffect; 0028 } 0029 0030 /** 0031 * A RAII approach to fadeout on track stop. Once created, it automatically 0032 * initiates fadeout. Fadeouter ensures that fadeoutFinished() is signalled when 0033 * fadeout is done. It also handles well situations where different track is played 0034 * while fadeout is still active. 0035 * 0036 * In each case, Fadeouter auto-deletes itself. 0037 */ 0038 class AMAROK_EXPORT Fadeouter : public QObject 0039 { 0040 Q_OBJECT 0041 0042 public: 0043 Fadeouter( const QPointer<Phonon::MediaObject> &media, 0044 const QPointer<Phonon::VolumeFaderEffect> &fader, 0045 int fadeOutLength ); 0046 0047 /** 0048 * Destructor ensures that fader volume is set back to normal 0049 */ 0050 ~Fadeouter() override; 0051 0052 Q_SIGNALS: 0053 /** 0054 * This signal is emitted when the fade-out is done. This signal may not 0055 * be emitted at all when Fadeouter is interrupted by new track playing. 0056 * Yuu should connect your track-finished-playing logic to this. 0057 */ 0058 void fadeoutFinished(); 0059 0060 private Q_SLOTS: 0061 /** 0062 * Emits fadeoutFinished() and commits Fadeouter suicide. 0063 */ 0064 void slotFinalizeFadeout(); 0065 0066 private: 0067 QPointer<Phonon::VolumeFaderEffect> m_fader; 0068 }; 0069 0070 #endif // FADEOUTER_H