main.cpp

#include <QApplication>
#include <QWidget>

#include "framelesshelper.h"

int main(int argc, char *argv[]) {
#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
    QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
#endif
#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
#if 0
    QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
        Qt::HighDpiScaleFactorRoundingPolicy::Round);
#else
    QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
        Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
#endif
#endif

    QApplication application(argc, argv);

    FramelessHelper helper;

    QWidget widget;
    helper.setFramelessWindows({&widget});
    widget.show();

    return QApplication::exec();
}