//代码占位符
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->setCentralWidget(new QWidget());    QDockWidget *dock = new QDockWidget("btn");
    dock->setWidget(new QOpenGLWidget());
    this->addDockWidget(Qt::DockWidgetArea::LeftDockWidgetArea, dock);
}MainWindow::~MainWindow()
{
    delete ui;
}