Question

I would like to create a simple thumbnail viewer using QGLWidget, QGraphicsScene and QGraphicsView. And I have a problem with placing QGLWidget on QGraphicsScene. The code is similar to this:

QGraphicsScene *testScene = new QGraphicsScene (0, 0, 400, 400, 0);

QGLWidget *testWidget1 = new QGLWidget();
testWidget1->renderText("Test text1");

QGLWidget *testWidget2 = new QGLWidget();
testWidget2->renderText("Test text2");

testScene->addWidget(testWidget1);
testScene->addWidget(testWidget2);

QGraphicsView *testView = new QGraphicsView();
testView->setScene(testScene);
testView->show()

It is possible to place few QGLWidgets on QGraphicsScene/QGraphicsView? Where I doing something wrong? Is there any other component on which I could embed QGLWidgets and show them on the screen?

Thanks for help

Answer 1

The QGraphicsScene::addWidget documentation states that QGLWidget is not a supported widget type.

Parenting a QGLWidget onto the viewport of the QGraphicsView doesn’t seem to work either.

Edit:

Actually parenting a QGLWidget to the viewport does work provided I put the renderText call within the paintGL method of my test GL widget.