DiskMusic.h

#ifndef DISKMUSIC_H
#define DISKMUSIC_H
#include <QTimer>
#include <QWidget>
class QPropertyAnimation;
class QVariantAnimation;
namespace Ui {
class DiskMusic;
}
 
class DiskMusic : public QWidget {
    Q_OBJECT
    Q_PROPERTY(qreal armAngle READ armAngle WRITE setArmAngle NOTIFY armAngleChanged);
    static constexpr const unsigned int ANIMATION_DURATION = 300; 
    static constexpr const unsigned int ANIMATION_FPS = 60; 
    static constexpr const qreal BEGIN_ANGLE = -30; 
    static constexpr const qreal END_ANGLE = -10; 
    static constexpr const unsigned int SWITCH_COLOR_MSEC_INTERVAL = 20000; 
    static constexpr const unsigned int COLOR_SWITCH_PROCESS_INTERVAL = 2000; 
 
    /* every time the default color media first open */
    static constexpr const QColor BEGIN_COLOR = QColor(173, 216, 230); 
    static constexpr const QColor END_COLOR = QColor(0, 51, 102); 
 
public:
    explicit DiskMusic(QWidget* parent = nullptr);
 
    void setStatus(bool set_is_playing);
 
    void setPixmap(const QString& pixmap_path);
 
    inline qreal armAngle() const {
        return angle;
    }
 
    inline void setArmAngle(qreal angle) {
        this->angle = angle;
        update();
        emit armAngleChanged();
    }
 
    ~DiskMusic();
 
signals:
    void armAngleChanged();
 
protected:
    void paintEvent(QPaintEvent* event) override;
 
private:
    Ui::DiskMusic* ui; 
    qreal angle { BEGIN_ANGLE }; 
    float current_rotations {}; 
    bool is_playing { false }; 
    QTimer animate_timer; 
    QPropertyAnimation* animation { nullptr };
    QVariantAnimation* color_animation { nullptr };
 
    struct {
        QPixmap coverPixmap; 
        QPixmap armPixmap; 
        QPixmap recordPixmap; 
    } pixmaps; 
    void initUi();
    void initCore();
 
    void process_rotation() {
        current_rotations += 0.5;
        if (current_rotations >= 360.0)
            current_rotations -= 360.0;
        update();
    }
    /* for current varient change */
    void process_the_color_change(QPainter& p);
    void startColorTransition();
 
    QColor beginColor { BEGIN_COLOR };
    QColor endColor { END_COLOR };
    QColor targetStart;
    QColor targetEnd;
 
    QTimer color_switch_timer;
};
 
#endif // DISKMUSIC_H