Qt在MacOSX上调整无框架构件的大小

#include <QtWidgets>

class CustomWindow : public QMainWindow
{
public:
    CustomWindow(QWidget *parent = nullptr) : QMainWindow(parent)
    {
        setWindowFlags(Qt::FramelessWindowHint);
    }

protected:
    void mousePressEvent(QMouseEvent *event) override
    {
        if (event->button() == Qt::LeftButton)
        {
            // 记录鼠标按下时的位置
            m_dragStartPosition = event->globalPos();
            m_originalGeometry = geometry();
        }
    }

    void mouseMoveEvent(QMouseEvent *event) override
    {
        if (event->buttons() & Qt::LeftButton)
        {
            // 计算鼠标移动的距离
            QPoint delta = event->globalPos() - m_dragStartPosition;
            // 更新窗口的位置和大小
            setGeometry(m_originalGeometry.x() + delta.x(), m_originalGeometry.y() + delta.y(), m_originalGeometry.width(), m_originalGeometry.height());
        }
    }

private:
    QPoint m_dragStartPosition;
    QRect m_originalGeometry;
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    CustomWindow window;
    window.show();

    return app.exec();
}