Segmentation fault with template

#include <QWidget>

template <class T>
class QWidgetDraw : public T
{
	public:
		explicit QWidgetDraw( QWidget* parent = 0 ) : QWidget(parent) {}

	protected:
		virtual void paintEvent( QPaintEvent* event );
};

template <class T>
virtual void QWidgetDraw<T>::paintEvent( QPaintEvent* event )
{
	Q_UNUSED(event);

	QPainter painter(this);
	painter.setRenderHint( QPainter::Antialiasing );

	// Draw simple widget
	QStyleOption opt;
	opt.init(this);


	////////////////////////////////////////////////////////////////////////////
	// Try to add this-> to this line
	style()->drawPrimitive(QStyle::PE_Widget, &opt, &painter, this);
}