QCefView, borrowed from the making of a test example, the UI replaced QWidget, runtime QCefView initialization error, trouble which bosses look

 QCefViewTest: : QCefViewTest (QWidget * parent) 
: QMainWindow (parent) 
{
M_widget=new QWidget. 
QHBoxLayout * layout=new QHBoxLayout (this); 
QPushButton * pBtnChangeColor=new QPushButton (" Change Color ", this); 
The connect (pBtnChangeColor, SIGNAL (clicked ()), and this, SLOT (onBtnChangeColorClicked ())); 
Layout - & gt; AddWidget (pBtnChangeColor); 

QDir dir=QCoreApplication: : applicationDirPath (); 
QString uri=QDir: : toNativeSeparators (dir. FilePath (" QCefViewTestPage. HTML ")); 
M_cefView=new QCefView (uri, m_widget); 
Layout - & gt; AddWidget (m_cefView); 

M_widget - & gt; SetLayout (layout); 
This - & gt; SetCentralWidget (m_widget); 
}