musicplayer.h Example File

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#ifndef MUSICPLAYER_H
#define MUSICPLAYER_H
#include <QWidget>
#include <QMediaPlayer>
class VolumeButton;
QT_FORWARD_DECLARE_CLASS(QLabel)
QT_FORWARD_DECLARE_CLASS(QSlider)
QT_FORWARD_DECLARE_CLASS(QAbstractButton)
QT_FORWARD_DECLARE_CLASS(QWinTaskbarButton)
QT_FORWARD_DECLARE_CLASS(QWinTaskbarProgress)
QT_FORWARD_DECLARE_CLASS(QWinThumbnailToolBar)
QT_FORWARD_DECLARE_CLASS(QWinThumbnailToolButton)
class MusicPlayer : public QWidget
{
    Q_OBJECT
public:
    explicit MusicPlayer(QWidget *parent = nullptr);
    static QStringList supportedMimeTypes();
    static QStringList supportedSuffixes();
public slots:
    void openFile();
    void playUrl(const QUrl& url);
    void togglePlayback();
    void seekForward();
    void seekBackward();
protected:
    bool event(QEvent *event) override;
    void dragEnterEvent(QDragEnterEvent *event) override;
    void dropEvent(QDropEvent *event) override;
    void mousePressEvent(QMouseEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void mouseReleaseEvent(QMouseEvent *event) override;
private slots:
    void stylize();
    void updateState(QMediaPlayer::State state);
    void updatePosition(qint64 position);
    void updateDuration(qint64 duration);
    void setPosition(int position);
    void updateInfo();
    void handleError();
    void updateTaskbar();
    void updateThumbnailToolBar();
private:
    void createWidgets();
    void createShortcuts();
    void createJumpList();
    void createTaskbar();
    void createThumbnailToolBar();
    QWinTaskbarButton *taskbarButton = nullptr;
    QWinTaskbarProgress *taskbarProgress = nullptr;
    QWinThumbnailToolBar *thumbnailToolBar = nullptr;
    QWinThumbnailToolButton *playToolButton = nullptr;
    QWinThumbnailToolButton *forwardToolButton = nullptr;
    QWinThumbnailToolButton *backwardToolButton = nullptr;
    QMediaPlayer mediaPlayer;
    QAbstractButton *playButton = nullptr;
    VolumeButton *volumeButton = nullptr;
    QSlider *positionSlider = nullptr;
    QLabel *positionLabel = nullptr;
    QLabel *infoLabel = nullptr;
    QPoint offset;
    QString fileName;
};
#endif // MUSICPLAYER_H