QOpenGLWidget problems

[epalmero]

Dear All:

I am trying to update to version 5.4 and I have a couple of queston. I begin to use the "QOpenGLWidget" replacing the all QGLWidget and I got into some issues that I did not find before.

Before my application was running all fine but now I got the following error:

"program is not valid in the current context"

when I detach and attach a QDockingWidget that inside contain the "QOpenGLWidget". Moreover before I use to call the updateGL to force the update of the widget when I change a property for example when I update a texture and now this does not seem to be there anymore. I try to use the regular update but this really does not update all the time. As far as I know there is no possibility to call directly the paintGL functions is there any other solution?

Thanks a lot

[stvokr]

Hi,

I have a similar problem. I use a tabbed widget with different opengl widgets in the tabs, which are closable. With QGLWidget all works fine. Now with QOpenGLWidget it often happens, that closing a tab and showing the next opengl context stops painting this opengl content. I found out that the paintGL() function is still called and the scene is rendered as well. Even interaction is possible, but the view seem to be frozen. Just a resize of the window starts painting the opengl content again.
Before I used updateGL() and this worked w/o problems. Now with update() this problem occurs.

Perhaps a bug?

[SGaist]

Hi,

If you can reproduce that with a minimal example then it's likely a bug. You should also take a look at the "bug report system":http://bugreports.qt.io to see if it's something known

[Neil G]

I am having the same problem. I had a QGLWidget in a QAbstractScrollArea. Everything was fine. With QOpenGLWidget, calls to update do not result in calls to paintGL despite all of these being true: isVisible(), updatesEnabled(), isEnabled().