Move SliderSlider and PrettySlider into own files

src/widgets/sliderslider.h

@@ -0,0 +1,68 @@
+/***************************************************************************
+                       sliderslider.h
+                        -------------------
+  begin                : Dec 15 2003
+  copyright            : (C) 2003 by Mark Kretschmann
+  email                : markey@web.de
+  copyright            : (C) 2005 by Gábor Lehel
+  email                : illissius@gmail.com
+  copyright            : (C) 2018-2023 by Jonas Kvinge
+  email                : jonas@jkvinge.net
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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 SLIDERSLIDER_H
+#define SLIDERSLIDER_H
+
+#include <QObject>
+#include <QSlider>
+
+class QMouseEvent;
+class QWheelEvent;
+
+class SliderSlider : public QSlider {
+  Q_OBJECT
+
+ public:
+  explicit SliderSlider(const Qt::Orientation, QWidget*, const int max = 0);
+
+  // 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()); }
+
+  virtual void SetValue(const uint value);
+  virtual void setValue(int 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 slideEvent(QMouseEvent*);
+  void mouseMoveEvent(QMouseEvent*) override;
+  void mousePressEvent(QMouseEvent*) override;
+  void mouseReleaseEvent(QMouseEvent*) override;
+  void wheelEvent(QWheelEvent*) override;
+
+  bool sliding_;
+  bool wheeling_;
+
+  /// we flip the value for vertical sliders
+  int adjustValue(int v) const;
+
+ private:
+  bool outside_;
+  int prev_value_;
+
+  SliderSlider(const SliderSlider&);
+  SliderSlider &operator=(const SliderSlider&);
+};
+
+#endif  // SLIDERSLIDER_H