QWebEngine: print a page?

Question

The migration from QWebKit to QWebEngine seems to be much more complicated than Qt guys claimed. With QWebKit I could print a webpage easily via

QWebView->print(&printer);

With QWebEngine class QWebEngine view does not provide a method print(). Their browser example uses a class named QWebEngineFrame which offers a method print() - but the whole QWebEngineFrame is not defined anywhere!

So my question: how do I print a page using QWebEngine?

Seems a little bit hacky, but does printing work if you call JavaScript inside a webpage: window.print() ? — Kamil Klimek, Sep 22 '15 at 08:34

score 10 · Accepted Answer · edited Sep 15 '18 at 07:03

10

I think the correct way to use QWebEngineView::render method because QWebEngineView is a QWidget. It accepts paint device as a first argument and you may pass QPrinter there for printing.

Update: If you can use the latest version of Qt, in Qt 5.8 a new function for printing page was added:

void QWebEnginePage::print(QPrinter *printer, FunctorOrLambda resultCallback);

Actually it first prints to temp PDF with QPrinter settings.

Here is the link to Qt docs.

You can read about this in our blog also.

edited Sep 15 '18 at 07:03

m7913d

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answered Sep 22 '15 at 08:40

demonplus

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This is not really a solution - try to print a page which is larger than what can be displayed visibly and you wil understand where the limits are ;-) – Elmi May 01 '16 at 15:26

score 3 · Answer 2 · answered May 05 '16 at 12:17

3

I would offer following code (for a while):

    QTextEdit *textEdit = new QTextEdit;
    ui.myWebView->page()->toHtml([textEdit](const QString &result){ textEdit->setHtml(result); });
    textEdit->print(somerinter);
    textEdit->deleteLater();

answered May 05 '16 at 12:17

eSKon

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Thanks! This works fine for simple printing of some HTML: `QTextEdit *textEdit = new QTextEdit; textEdit->setHtml(td.toHtml()); textEdit->print(_printer); textEdit->deleteLater();` where td is a QTextDocument. – Marc Jul 26 '16 at 14:42

mohabouje · Answer 3 · 2017-02-21T16:30:57.020

2

Qt 5.7 includes print support in to pdf files for QWebEngine.

Use printToPdf function to export the current page in a pdf file. Example:

const QString fileName = QFileDialog::getSaveFileName(0,
                                                tr("Save pdf"),
                                                ".",
                                                tr("PDF Files (*.pdf)"));
if (fileName.isEmpty()) {
    return;
}
ui->webView->page()->printToPdf(fileName);

edited Feb 21 '17 at 16:30

answered Jul 13 '16 at 12:25

mohabouje

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It should be noted that the printToPdf() method adds static text "PAGE 2:" to the top of the 2nd page, and so on, and this is not configurable. Additionally, there is no way to add custom headers/footers to each page. If these two things don't bother you, it's a great simple solution and works even when the document spans multiple pages. – Vern Jensen May 25 '17 at 00:22

score 1 · Answer 4 · answered Feb 02 '18 at 17:36

1

QWebView->page()->print(&printer, [=](bool){});

answered Feb 02 '18 at 17:36

Simon Esneault

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true for Qt 5.8 or newer but for sure not for 5.5 – Elmi Feb 07 '18 at 14:19
1

Yes, this is for Qt >= 5.8 – Simon Esneault Feb 08 '18 at 15:17

QWebEngine: print a page?

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