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mediaplayer.h Example File
demos/qmediaplayer/mediaplayer.h

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 #ifndef MEDIALAYER_H
 #define MEDIAPLAYER_H

 #include <QtGui/QWidget>
 #include <QtGui/QApplication>
 #include <QtCore/QTimerEvent>
 #include <QtGui/QShowEvent>
 #include <QtGui/QIcon>

 #include <Phonon/AudioOutput>
 #include <Phonon/BackendCapabilities>
 #include <Phonon/Effect>
 #include <Phonon/EffectParameter>
 #include <Phonon/EffectWidget>
 #include <Phonon/MediaObject>
 #include <Phonon/SeekSlider>
 #include <Phonon/VideoWidget>
 #include <Phonon/VolumeSlider>

 class QPushButton;
 class QLabel;
 class QSlider;
 class QTextEdit;
 class QMenu;
 class Ui_settings;

 class MediaPlayer :
             public QWidget
 {
     Q_OBJECT
 public:
     MediaPlayer(const QString &,
                 const bool hasSmallScreen);

     void dragEnterEvent(QDragEnterEvent *e);
     void dragMoveEvent(QDragMoveEvent *e);
     void dropEvent(QDropEvent *e);
     void handleDrop(QDropEvent *e);
     void setFile(const QString &text);
     void initVideoWindow();
     void initSettingsDialog();

 public slots:
     void openFile();
     void rewind();
     void forward();
     void updateInfo();
     void updateTime();
     void finished();
     void playPause();
     void scaleChanged(QAction *);
     void aspectChanged(QAction *);

 private slots:
     void setAspect(int);
     void setScale(int);
     void setSaturation(int);
     void setContrast(int);
     void setHue(int);
     void setBrightness(int);
     void stateChanged(Phonon::State newstate, Phonon::State oldstate);
     void effectChanged();
     void showSettingsDialog();
     void showContextMenu(const QPoint &);
     void bufferStatus(int percent);
     void openUrl();
     void configureEffect();
     void hasVideoChanged(bool);

 private:
     QIcon playIcon;
     QIcon pauseIcon;
     QMenu *fileMenu;
     QPushButton *playButton;
     QPushButton *rewindButton;
     QPushButton *forwardButton;
     Phonon::SeekSlider *slider;
     QLabel *timeLabel;
     QLabel *progressLabel;
     Phonon::VolumeSlider *volume;
     QSlider *m_hueSlider;
     QSlider *m_satSlider;
     QSlider *m_contSlider;
     QLabel *info;
     Phonon::Effect *nextEffect;
     QDialog *settingsDialog;
     Ui_settings *ui;

     QWidget m_videoWindow;
     Phonon::MediaObject m_MediaObject;
     Phonon::AudioOutput m_AudioOutput;
     Phonon::VideoWidget *m_videoWidget;
     Phonon::Path m_audioOutputPath;
     const bool m_hasSmallScreen;
 };

 #endif //MEDIAPLAYER_H