QWidget::repaint: Recursive repaint detected

[Mostafa Wasat]

Where can I learn more about this error ? any online documentation ? How can I debug this error ?

[jsulm]

Did you override the paintEvent?

[Mostafa Wasat]

@jsulm yes, declared as
void paintEvent(QPaintEvent *e) Q_DECL_OVERRIDE;

[jsulm]

Can you post its content?

[Mostafa Wasat]

@jsulm

void OpenGLWidget::paintEvent(QPaintEvent *e){
    QPainter p;

   // updateGL();

    p.begin(this);
    p.setPen(Qt::white);
    p.drawText(QPointF(50,50),"Test");
    p.end();
}

[Mostafa Wasat]

could it be that the QOpenGLWidget is initialized before menubar() in the MainWindow.h , thus making a conflict ?

[Chris Kawa]

updateGL causes a paintEvent which calls updateGL, which causes paintEvent which...
Yes, this is recursive.

[Mostafa Wasat]

@Chris-Kawa in case you didnt notice, the call to updateGL() is commented out.

[Chris Kawa]

Ah, ok. I thought it was commented out because it caused the error.

You can always put a breakpoint in the line printing the error and look at the call stack to see where is it coming from. It could be a repaint called from non-ui thread or a direct call to paintEvent from somewhere.