QHBoxLayout

[VitaliBR]

I am doing the following to add my class (directX) in a QHBoxLayout:

Window::Window(QWidget* parent)
	: QWidget(0) // top-level, no parent
{
	ui.setupUi(this);
 
	QHBoxLayout *layout = new QHBoxLayout();
	setLayout(layout);
	layout->addWidget(new QD3DWidget(this));
}

Window::Window(QWidget* parent)
	: QWidget(0) // top-level, no parent
{
	ui.setupUi(this);

	QHBoxLayout *layout = new QHBoxLayout();
	setLayout(layout);
	layout->addWidget(new QD3DWidget(this));
}

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Everything works perfectly, but would like to use the QT Designer,
So I created a QHBoxLayout but I can not add in my QD3DWidget QHBoxLayout, I'm trying something like:

Window::Window(QWidget* parent)
	: QWidget(0) // top-level, no parent
{
	ui.setupUi(this);
 
	ui.horizontalLayout->addWidget(new QD3DWidget(this));
}

Window::Window(QWidget* parent)
	: QWidget(0) // top-level, no parent
{
	ui.setupUi(this);

	ui.horizontalLayout->addWidget(new QD3DWidget(this));
}

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The viewport directx does not appear, only a white window appears, and I set to be blue in directX,and when I make the code directly (without ui) it is blue

Thanks