QGLWidget problem

[jacek]

setLayout(m_pVLayout); // sets main layout on widget
setLayout(m_pHLayout); // sets main layout on widget

You can't set the layout twice.

[MarkoSan]

I've commented the line:

setLayout(m_pHLayout);    // sets main layout on widget

setLayout(m_pHLayout);    // sets main layout on widget

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and I get same result.