[PyQt] Bug: QOpenGLWidget does not update

Neil Girdhar mistersheik at gmail.com
Mon Nov 2 12:24:43 GMT 2015

On Mon, Nov 2, 2015 at 7:14 AM Phil Thompson <phil at riverbankcomputing.com>

> > On 2 Nov 2015, at 11:15 a.m., Neil Girdhar <mistersheik at gmail.com>
> wrote:
> >
> > Problem described here:
> http://stackoverflow.com/questions/30748991/how-can-qopenglwidget-update-not-result-in-paintgl-events
> >
> > and here:
> >
> http://stackoverflow.com/questions/32428687/pyqt5-qopenglwidget-idle-issue
> >
> > This is a crippling issue since QGLWidget has a lot of bugs (on OS X at
> least).
> Version numbers and a short script that demonstrates the problem would be
> helpful.

My versions are:
Python 3.5
PyQt: 5.5.1
Qt: 5.5

I will try to put together a short script, but my experiments show that
despite update being called, paintGL is only called twice when the widget
is created.  Some things like adding and removing widgets from the vbox
layout that the QOpenGLWidget belongs to also triggers paintGL
invocations.  For some reason the paintGL invocations are not being emitted
by QOpenGLWidget.update.

> What's to suggest this is a PyQt problem rather than a Qt problem?

Of course, I can't know, but I cannot find anyone running into this problem
on Qt, whereas two people have run into it on PyQt.

> > Also, why is there no externally-facing issue tracker for PyQt?  How are
> people supposed to submit issues?
> You just did.

Okay, thanks for your help!

> Phil
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.riverbankcomputing.com/pipermail/pyqt/attachments/20151102/e4d99179/attachment.html>

More information about the PyQt mailing list