#include <QAction>
#include <QMenu>
#include <QToolButton>

#include <QApplication>
#include <QGuiApplication>


int main(int argc, char *argv[])
{ // non-integer device-pixel ratio causes problems when passed through
  QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough); // problem
  //QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::Floor); // okay

  // application
  QApplication app(argc,argv);

  // QtoolButton is clipped (and deformed) when non-integer device pixel ratio is passed through
  // tested on 4K screen under Windows 10 with a device pixel ratio 1.5
	//
	// note that the double arrow is due to QTBUG-100109

  QMenu *menu = new QMenu();
  menu->addAction(new QAction("ABC"));

  QToolButton toolbutton;
  toolbutton.setArrowType(Qt::DownArrow);
  toolbutton.setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
  toolbutton.setPopupMode(QToolButton::InstantPopup);
  toolbutton.setMenu(menu);
	toolbutton.show();

  return QApplication::exec();
}