scroll_area.h

#pragma once
 
#include <QPainter>
#include <QPainterPath>
#include <QScrollArea>

class StyledScrollArea : public QScrollArea
{
  Q_OBJECT
 
public:
  enum class BackgroundRole
  {
    Window,     
    Base,       
    Button,     
    Midlight,   
    Custom      
  };

  StyledScrollArea(QWidget* parent = nullptr);

  void setBackgroundRole(BackgroundRole role);

  void setCustomBackgroundColor(const QColor& color);
 
protected:
  bool viewportEvent(QEvent* event) override;
 
private:
  BackgroundRole mBackgroundRole = BackgroundRole::Base; 
  QColor mCustomBackgroundColor; 

  QColor backgroundColor() const;
};