#include "QtWidgetsApplication1.h"

#include <QProxyStyle>

class CMenuStyle : public QProxyStyle
{
public:
   static constexpr int m_iconSize = 20;

   explicit CMenuStyle(bool bFromTouch = false, QStyle* style = nullptr) : m_bFromTouch(bFromTouch), QProxyStyle(style) {}
   explicit CMenuStyle(const QString& key) : QProxyStyle(key) {}
   ~CMenuStyle() override = default;

   void SetFromTouch(bool bSet) noexcept { m_bFromTouch = bSet; }

   static constexpr int GetIconSize(bool bForTouch = false) { return !bForTouch ? m_iconSize : 2 * m_iconSize; }

   int pixelMetric(QStyle::PixelMetric metric, const QStyleOption* option = nullptr, const QWidget* widget = nullptr) const override
   {
      switch (metric)
      {
      case QStyle::PM_SmallIconSize:
         return GetIconSize(m_bFromTouch);
      default:
         return QProxyStyle::pixelMetric(metric, option, widget);
      }
   }

private:
   bool m_bFromTouch = false;
};

QtWidgetsApplication1::QtWidgetsApplication1(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);

    QMenuBar* mnuBar = menuBar();

    QMenu* mnuFile = new QMenu(tr("File"), mnuBar);
    mnuFile->addAction("act1");
    mnuFile->addAction("act2");
    mnuBar->addMenu(mnuFile);
    
    CMenuStyle *mnuStyle = new CMenuStyle;
    mnuStyle->setParent(mnuFile);
    mnuFile->setStyle(mnuStyle);

    setStyleSheet("background-color: rgb(255, 170, 0);");

    mnuBar->show();
}

QtWidgetsApplication1::~QtWidgetsApplication1()
{}