[Interest] QOpenGLWindow inside QSplitter horizontal layout ?

[Volker Hilsheimer]

> On 21 May 2021, at 06:02, Nicholas Yue <yue.nicholas at gmail.com> wrote:
> 
> Hi,
> 
> I am learning about QOpenGLWindow
> 
> I saw examples which utilizes it via
> 
>         QWidget::createWindowContainer()
> 
> I am wondering if there is a way to house it as a widget inside a layout ?
> 
> My current attempt is not working.
> 
> ```
> MainWindow::MainWindow(QWidget *parent) :
>     QMainWindow(parent),
>     ui(new Ui::MainWindow),
>     m_myWindow(new MyOpenGLWindow)
> {
>     ui->setupUi(this);
> 
>     connect(ui->actionQuit, &QAction::triggered, this, &MainWindow::OnFileClose);
> 
>     m_myWindow->create();
> #ifdef ORIGINAL_WORKING_EXAMPLE
>     m_myWindow->setMainWindow(this);
>     QWidget *w = QWidget::createWindowContainer(m_myWindow);
> 
>     takeCentralWidget();
>     setCentralWidget(w);
> #else
>     m_myWindow->setMainWindow(this);
>     QWidget *w = QWidget::createWindowContainer(m_myWindow);
>     // delete ui->targetWidget;
>     // ui->targetWidget = QWidget::createWindowContainer(m_myWindow);
>     // ui->targetWidget->setMinimumSize(400,400);
>     w->setMinimumSize(200,200);
>     w->setMaximumSize(200,200);
>     // ui->targetWidget->createWindowContainer(m_myWindow);
>     // takeCentralWidget();
>     //setCentralWidget(ui->targetWidget);
>     ui->splitter->layout()->addWidget(w);
> #endif
> }
> ```
> 
> Cheers
> -- 
> Nicholas Yue


As the name suggests, QOpenGLWindow is a QWindow, and QWindow’s are designed to be top level windows.

To embed an OpenGL rendering surface into a widget-based UI, you should be looking at QOpenGLWidget instead:

https://doc.qt.io/qt-6/qopenglwidget.html

Volker