WebEngine Widgets Html2Pdf Example#
Converts web pages to PDF documents using Qt WebEngine.
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:
QWebEngineViewto begin loading the target URL and wait for it to finish.
QWebEngineViewto begin converting the loaded page into a PDF file and again wait for it to finish.
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
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#
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.