Add option to disable volume control

src/widgets/volumeslider.h

@@ -0,0 +1,150 @@
+/***************************************************************************
+                       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 <stdbool.h>
+
+#include <QtGlobal>
+#include <QObject>
+#include <QWidget>
+#include <QList>
+#include <QString>
+#include <QPixmap>
+#include <QColor>
+#include <QPalette>
+#include <QSlider>
+#include <QTimer>
+#include <QtEvents>
+
+class QEvent;
+class QMouseEvent;
+class QPaintEvent;
+class QWheelEvent;
+class QContextMenuEvent;
+
+class SliderSlider : public QSlider {
+  Q_OBJECT
+
+ public:
+  SliderSlider(Qt::Orientation, QWidget*, uint 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);
+
+ protected:
+  virtual void wheelEvent(QWheelEvent*);
+  virtual void mouseMoveEvent(QMouseEvent*);
+  virtual void mouseReleaseEvent(QMouseEvent*);
+  virtual void mousePressEvent(QMouseEvent*);
+  virtual void slideEvent(QMouseEvent*);
+
+  bool m_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 m_outside;
+  int m_prevValue;
+
+  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;
+
+  PrettySlider(Qt::Orientation orientation, SliderMode mode, QWidget* parent, uint max = 0);
+
+ protected:
+  virtual void slideEvent(QMouseEvent*);
+  virtual void mousePressEvent(QMouseEvent*);
+
+ private:
+  PrettySlider(const PrettySlider&);             // undefined
+  PrettySlider& operator=(const PrettySlider&);  // undefined
+
+  SliderMode m_mode;
+};
+
+class VolumeSlider : public SliderSlider {
+  Q_OBJECT
+
+ public:
+  VolumeSlider(QWidget* parent, uint max = 0);
+  void SetEnabled(const bool enabled);
+
+ protected:
+  virtual void paintEvent(QPaintEvent*);
+  virtual void enterEvent(QEvent*);
+  virtual void leaveEvent(QEvent*);
+  virtual void paletteChange(const QPalette&);
+  virtual void slideEvent(QMouseEvent*);
+  virtual void mousePressEvent(QMouseEvent*);
+  virtual void contextMenuEvent(QContextMenuEvent*);
+  virtual void wheelEvent(QWheelEvent* e);
+
+ 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 m_animEnter;
+  int m_animCount;
+  QTimer* m_animTimer;
+
+  QPixmap m_pixmapInset;
+  QPixmap m_pixmapGradient;
+
+  QColor m_previous_theme_text_color;
+  QColor m_previous_theme_highlight_color;
+
+  QList<QPixmap> m_handlePixmaps;
+};
+
+#endif  // VOLUMESLIDER_H