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QWebEnginePage Genus est in Qt WebEngine moduli qui praebet instrumenti ad processus telae contentus.si vis imprimereQWebEnginePage contentus, uti potesQPrinter etQPrintDialog classis ad complendum.

Exertum cum modulo WebEngine Qt configuratur et in .pro tabella tua conformationem includit:

QT += webenginewidgets

Codex exsecutionis talis est, ut referat

printme « webenginewidgets « exempla qt/qtwebengine.git - Qt WebEngine

main.cpp

#include "printhandler.h"
#include <QApplication>
#include <QShortcut>
#include <QWebEngineView>
 
int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QApplication app(argc, argv);
 
    view.setUrl(QUrl(QStringLiteral("qrc:/index.html")));
    view.resize(1024, 750);
    view.show();
 
    PrintHandler handler;
    handler.setPage(view.page());
 
    auto printPreviewShortCut = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_P), &view);
    auto printShortCut = new QShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_P), &view);
 
    QObject::connect(printPreviewShortCut, &QShortcut::activated, &handler, &PrintHandler::printPreview);
    QObject::connect(printShortCut, &QShortcut::activated, &handler, &PrintHandler::print);
 
    return app.exec();
}

printhandler.h

#ifndef PRINTHANDLER_H
#define PRINTHANDLER_H
#include <qapplication.h>
#include <QObject>
#include <QWebEngineView>
#include <QPrinter>
#include <QPrintPreviewDialog>
#include <QEventLoop>
#include <QPrintDialog>
#include <QWidget>
#include <QMainWindow>
#include <QPrinterInfo>
#include "CustomWebEnginePage.h"
#include <qapplication.h>
#include <qtimer.h>
class PrintHandler : public QObject
{
    Q_OBJECT
public:
    explicit PrintHandler(QString printName, QObject *parent = nullptr);
 
signals:
 
public slots:
 
public:
    void setPrintUrl(const QString&  url);
	void setPrintName(const QString& name);
    void printPreview();
    void printDocument(QPrinter *printer);
    void print();
private:
    //void print();
private:
	QString mPrinterName;
	CustomWebEnginePage* mPage;
	QString mUrl;
    bool mInPrintPreview;
	QTimer* waitTimer;
};
 
#endif // PRINTHANDLER_H

printhandler.cpp

#include "printhandler.h"
#include <QDebug>
PrintHandler::PrintHandler(QString printName,QObject *parent) : mPrinterName(printName),QObject(parent)
{
    mInPrintPreview=false;
	mPage = new CustomWebEnginePage();
	waitTimer = new QTimer();
	waitTimer->setInterval(500);
	waitTimer->setSingleShot(true);
	connect(waitTimer, &QTimer::timeout, this, &PrintHandler::print);
	connect(mPage, &CustomWebEnginePage::loadFinished, waitTimer, static_cast<void(QTimer::*)()>(&QTimer::start));
 
}
 
void PrintHandler::setPrintUrl(const QString& url)
{
	mUrl = url;
	mPage->setUrl(url);
}
 
void PrintHandler::printPreview()
{
    if (!mPage)
      return;
    if (mInPrintPreview)
      return;
	mInPrintPreview = true;
    QPrinter printer;
    QPrintPreviewDialog preview(&printer, mPage->view());
    connect(&preview, &QPrintPreviewDialog::paintRequested,
          this, &PrintHandler::printDocument);
    preview.exec();
	mInPrintPreview = false;
}
 
 
void PrintHandler::printDocument(QPrinter *printer)
{
    QEventLoop loop;
    bool result;
    auto printPreview = [&](bool success) { result = success; loop.quit(); };
    mPage->print(printer, std::move(printPreview));
    loop.exec();
    if (!result) {
        QPainter painter;
        if (painter.begin(printer)) {
            QFont font = painter.font();
            font.setPixelSize(15);
            painter.setFont(font);
            painter.drawText(QPointF(10,25),QStringLiteral("Could not generate print preview."));
 
            painter.end();
        }
    }
}
void PrintHandler::setPrintName(const QString& name)
{
    mPrinterName = name;
}
 
 
 
void PrintHandler::print()
{
    QStringList printerNameList=QPrinterInfo::availablePrinterNames();
    foreach (QString printerStr, printerNameList)
    {
        if(printerStr== mPrinterName)
        {
            QPrinter printer(QPrinter::HighResolution);
			printer.setOutputFormat(QPrinter::NativeFormat);
 
            printer.setPrinterName(printerStr);
			//打印界面
           /* QPrintDialog dialog(&printer, mPage->view());
            if (dialog.exec() != QDialog::Accepted)
                return;*/
            printDocument(&printer);
			return;
        }
    }
      qDebug() << "not find printer";
 
 
}

Pro HTTPS nexus URL, resonant "Connexio tua non est nexus dedicata", apparebit. Opus est terrorem hunc transilire, ut QWebEnginePage possidere debes et genus facere.

CustomWebEnginePage.h

#pragma once
 
#include <QWebEnginePage>
 
class CustomWebEnginePage : public QWebEnginePage
{
	Q_OBJECT
 
public:
	CustomWebEnginePage();
	~CustomWebEnginePage();
	virtual bool certificateError(const QWebEngineCertificateError &certificateError);
};

CustomWebEnginePage.cpp

#include "CustomWebEnginePage.h"
 
CustomWebEnginePage::CustomWebEnginePage()
{
}
 
CustomWebEnginePage::~CustomWebEnginePage()
{
}
 
 
bool CustomWebEnginePage::certificateError(const QWebEngineCertificateError &certificateError)
{
	return true;
}