QPrintPreviewWidget::Print(); slot prints clear blank pages

in version 4.6.3 and 4.7.0
code:
{
QPrintPreviewWidget PrintPageWidget(PrintPage);
PrintPageWidget.setVisible(0);
for(unsigned int i = 0;i<PageCount;i++)

{ QObject::connect(&PrintPageWidget, SIGNAL(paintRequested(QPrinter*)), &(ArrayPageComp[i].WebViewInv), SLOT(print(QPrinter*))); PrintPageWidget.updatePreview () ; PrintPageWidget.print(); QObject::disconnect(&PrintPageWidget, SIGNAL(paintRequested(QPrinter*)), &(ArrayPageComp[i].WebViewInv), SLOT(print(QPrinter*))); }

}
prints pages with data`s from ArrayPageComp[i].WebViewInv (QWebView).
In version 4.7.3 this code prints clear pages...