[Development] QGLWidget creation with non-visible parent

[Csaba Csernai]

Thanks your tip. I thought about it, but the problem is that many other
object created that are depending on shaders and also all the
configuration, data uploading, etc. are handled before the first showEvent
occurring.
It is possible to make a workaround, but really it would be a hell of a
work. That's why I am hoping it will be fixed in the next release maybe, if
it's an error.

Best regards,
 Csaba Csernai


2013/11/29 joao morgado <joaodeusmorgado at yahoo.com>

> Hi
>
> I had the same similar issue, I was using a parent widget, with buttons
> and a frame with a child qglwidget derived class.
> What I did was to create a method in the child qglwidget derived class to
> initialize the shaders, and I only calls this method inside the showEvent()
> of the parent widget class.
>
> Regards
> Joao de Deus
>
>
>
>   Em Sexta-feira, 29 de Novembro de 2013 6:58, Csaba Csernai <
> csernai.csaba at gmail.com> escreveu:
>  Hi everyone!
>
> I would like to ask your help in some Qt 5 matter. I think it's somewhat
> related to QTBUG-31451, but not sure.
>
> When I create a QGLWidget with a parent which not yet visible, then it
> seems to fail to compile shaders although QGLContext is valid( at least the
> isValid function returns true).
> e.g.: there is a tab widget, which is visible, and from code we add
> another tab, so that it contains a QWidget and inside the QWidget, there is
> a QGLWidget( yeah, i kno w it's messed up, but that's it). So when we
> create the QGLWidget with the QWidget parent, the QWidget is not visible,
> and - as far as i discovered - it has no window handle.
>
> It worked fine, in 4.8, and i compile with msvc 11.0.
>
> My question is that is it a bug or did I miss something? Would someone
> point me in the right direction?Should i post my findings to the mentioned
> bug thread or create a new one?
>
> Thanks.
> Bye,
>
> --
> Csaba Csernai
> C/C++ Software Developer
> Mediso Medical Imaging Systems Ltd.
> Hungary, H-1022 Budapest,
> Alsótörökvész 14.
>
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>


-- 
Csaba Csernai
C/C++ Software Developer
Mediso Medical Imaging Systems Ltd.
Hungary, H-1022 Budapest,
Alsótörökvész 14.
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