Failing to set margins when printing to pdf

[devarde]

I am using Qt 5.7 + Ubuntu 16.06 64 bits. After I load a page using QWebEnginePage I try to invoke the printToPdf method of QebEnginePage (link text). One of the arguments is a PageLayout and one of the arguments to create a PageLayout is the margin:

QPageLayout( QPageSize( QPageSize::A4 ), QPageLayout::Portrait, QMarginsF())

In my case I am using

QPageLayout( QPageSize( QPageSize::A4 ), QPageLayout::Portrait, QMarginsF(0,0,0,0))

But any value that I am passing to the pageloyut is ignored in the generated PDF.
The single way to workaround I found is to set up the following in CSS

@page{
   margin: 0;
}

Is there any way to specify a margin via C++ code?

[Bui Trung]

Did you try this function of QPrinter ?
http://doc.qt.io/qt-5/qprinter.html#setPageMargins