[Qt-interest] qglwidget: how to share context

[Oliver Hunger]

hi there, again me, the one with little knowledge of what i'm actually 
doing ;-)

i've read a lot about the possibility to share the context of qglwidgets.
i've really searched hard, but couldn't find any example on google. all 
i get is that it IS possible, but not HOW ...

can anyone please help?

what i've tried so far:

this gives me an "invalid conversion from 'const QGLContext*' to 
'QGLContext*'" in the hw=... line

Widget::Widget(QWidget *parent) : QWidget(parent)
{
     glw = new GLWidget(this);
     hw = new HiddenWidget(glw->context(), this, glw);
...
}

HiddenWidget::HiddenWidget(QGLContext *contxt, QWidget *parent, 
QGLWidget *shared) : QGLWidget(contxt, parent, shared)
{
...
}

GLWidget::GLWidget(QWidget *parent) : QGLWidget(parent)
{
...
}


i've also tried something like

     QGLFormat format;
     QGLContext *contxt;
     contxt=new QGLContext(format);

in the Widget class constructor and pass that to another constructor for 
GLWidget and to HiddenWidget, but that didn't work either, and i 
wouldn't know where and when to assign the context to whom ...

     glw = new GLWidget(contxt, this, NULL);
     hw = new HiddenWidget(contxt, this, glw);


GLWidget::GLWidget(QGLContext *contxt, QWidget *parent, QGLWidget 
*shared) : QGLWidget(contxt, parent, shared)
{
}


thanks for help,

oliver