प्रौद्योगिकी साझेदारी

한어Русский языкEnglishFrançaisIndonesianSanskrit日本語DeutschPortuguêsΕλληνικάespañolItalianoSuomalainenLatina

QWebEnginePage Qt WebEngine मॉड्यूले एकः वर्गः अस्ति यः जालसामग्रीसंसाधनार्थं अन्तरफलकं प्रदाति ।यदि भवान् मुद्रयितुम् इच्छतिQWebEnginePage सामग्री, भवन्तः उपयोक्तुं शक्नुवन्तिQPrinter तथाQPrintDialog class to implement.

परियोजना Qt WebEngine मॉड्यूलेन सह विन्यस्तं भवति तथा च तत्सम्बद्धं विन्यासं भवतः .pro सञ्चिकायां समाविष्टं भवति:

QT += webenginewidgets

कार्यान्वयनसङ्केतः निम्नलिखितरूपेण अस्ति, सन्दर्भार्थम्

printme « webenginewidgets « उदाहरण - 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();
}

मुद्रणहैण्डलर.ह

#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";
 
 
}

HTTPS URL संयोजनानां कृते, "भवतः संयोजनं समर्पितं संयोजनं नास्ति" इति अलार्मः दृश्यते, अतः भवद्भिः एतत् अलार्मं त्यक्त्वा QWebEnginePage उत्तराधिकारं कृत्वा वर्गं कर्तुं आवश्यकम् ।

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;
}