WebEngine Widgets Html2Pdf Example#

Converts web pages to PDF documents using Qt WebEngine.

../_images/html2pdf-example.png

Html2Pdf demonstrates how to use Qt WebEngine to implement a command-line application for converting web pages into PDF documents.

Running the Example#

To run the example from Qt Creator , open the Welcome mode and select the example from Examples. For more information, visit Building and Running an Example.

The Conversion Process#

In order to convert a web page into a PDF document we need to:

  1. Create a QWebEngineView .

  2. Tell the QWebEngineView to begin loading the target URL and wait for it to finish.

  3. Tell the QWebEngineView to begin converting the loaded page into a PDF file and again wait for it to finish.

  4. Once the conversion is finished, exit the program.

This process is encapsulated in the Html2PdfConverter class:

In the constructor we create the QWebEngineView and connect to its loadFinished and pdfPrintingFinished signals:

The run() method will trigger the conversion process by asking QWebEnginePage to start loading the target URL. We then enter the main event loop:

After the loading is finished we begin PDF generation. We ask the printToPdf method to write the output directly to disk:

Once we receive the signal that the PDF conversion has finished, all that remains is to report potential errors and exit the program:

The Main Function#

Our main function is responsible for setting up a QApplication and parsing command line arguments:

Note that to use Qt WebEngine Widgets we need to create a QApplication and not a QCoreApplication , even though this is a command line application.

Example project @ code.qt.io