strawberry-audio-player-windows-mac-linux/src/widgets/volumeslider.h

/***************************************************************************
                       amarokslider.h  -  description
                          -------------------
 begin                : Dec 15 2003
 copyright            : (C) 2003 by Mark Kretschmann
 email                : markey@web.de
 copyright            : (C) 2005 by Gábor Lehel
 email                : illissius@gmail.com
***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef VOLUMESLIDER_H
#define VOLUMESLIDER_H

#include "config.h"

#include <QtGlobal>
#include <QObject>
#include <QWidget>
#include <QList>
#include <QString>
#include <QPixmap>
#include <QColor>
#include <QPalette>
#include <QSlider>

class QTimer;
class QEvent;
class QMouseEvent;
class QPaintEvent;
class QWheelEvent;
class QContextMenuEvent;
class QEnterEvent;

class SliderSlider : public QSlider {
  Q_OBJECT

 public:
  explicit SliderSlider(const Qt::Orientation, QWidget*, const int max = 0);

  virtual void setValue(int);

  // WARNING non-virtual - and thus only really intended for internal use this is a major flaw in the class presently, however it suits our current needs fine
  int value() const { return adjustValue(QSlider::value()); }

 signals:
  // we emit this when the user has specifically changed the slider so connect to it if valueChanged() is too generic Qt also emits valueChanged(int)
  void sliderReleased(int);  // clazy:exclude=overloaded-signal

 protected:
  void wheelEvent(QWheelEvent*) override;
  void mouseMoveEvent(QMouseEvent*) override;
  void mouseReleaseEvent(QMouseEvent*) override;
  void mousePressEvent(QMouseEvent*) override;
  virtual void slideEvent(QMouseEvent*);

  bool sliding_;

  /// we flip the value for vertical sliders
  int adjustValue(int v) const {
    int mp = (minimum() + maximum()) / 2;
    return orientation() == Qt::Vertical ? mp - (v - mp) : v;
  }

 private:
  bool outside_;
  int prev_value_;

  SliderSlider(const SliderSlider&);             // undefined
  SliderSlider &operator=(const SliderSlider&);  // undefined
};

class PrettySlider : public SliderSlider {
  Q_OBJECT

 public:
  typedef enum {
    Normal,  // Same behavior as Slider *unless* there's a moodbar
    Pretty
  } SliderMode;

  explicit PrettySlider(const Qt::Orientation orientation, const SliderMode mode, QWidget *parent, const uint max = 0);

 protected:
  void slideEvent(QMouseEvent*) override;
  void mousePressEvent(QMouseEvent*) override;

 private:
  PrettySlider(const PrettySlider&);             // undefined
  PrettySlider &operator=(const PrettySlider&);  // undefined

  SliderMode m_mode;
};

class VolumeSlider : public SliderSlider {
  Q_OBJECT

 public:
  explicit VolumeSlider(QWidget *parent, uint max = 0);
  void SetEnabled(const bool enabled);

 protected:
  void paintEvent(QPaintEvent*) override;
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
  void enterEvent(QEnterEvent*) override;
#else
  void enterEvent(QEvent*) override;
#endif
  void leaveEvent(QEvent*) override;
  virtual void paletteChange(const QPalette&);
  void slideEvent(QMouseEvent*) override;
  void mousePressEvent(QMouseEvent*) override;
  void contextMenuEvent(QContextMenuEvent*) override;
  void wheelEvent(QWheelEvent *e) override;

 private slots:
  virtual void slotAnimTimer();

 private:
  void generateGradient();
  QPixmap drawVolumePixmap() const;
  void drawVolumeSliderHandle();

  VolumeSlider(const VolumeSlider&);             // undefined
  VolumeSlider &operator=(const VolumeSlider&);  // undefined

  ////////////////////////////////////////////////////////////////
  static const int ANIM_INTERVAL = 18;
  static const int ANIM_MAX = 18;

  bool anim_enter_;
  int anim_count_;
  QTimer *timer_anim_;

  QPixmap pixmap_inset_;
  QPixmap pixmap_gradient_;

  QColor previous_theme_text_color_;
  QColor previous_theme_highlight_color_;

  QList<QPixmap> handle_pixmaps_;
};

#endif  // VOLUMESLIDER_H