Taking a screenshot of a web page in PyQt5

Question

I would like to use PyQt5 to take a screenshot of a webpage. (A full webpage, including the stuff a user wouldn't see unless they scrolled down.)

Supposedly, it is possible to do this in PyQt5 using QtWebEngine. How would you do it though? I specifically don't want the user to see a browser window opening or rendering. I just want a screenshot in a PNG file.

Answer 1

Here is an example for QtWebEngine (version 5.12):

import sys

from PyQt5.QtWidgets import QApplication
from PyQt5.QtCore import Qt, QUrl, QTimer
from PyQt5.QtWebEngineWidgets import QWebEngineView, QWebEngineSettings


class Screenshot(QWebEngineView):

    def capture(self, url, output_file):
        self.output_file = output_file
        self.load(QUrl(url))
        self.loadFinished.connect(self.on_loaded)
        # Create hidden view without scrollbars
        self.setAttribute(Qt.WA_DontShowOnScreen)
        self.page().settings().setAttribute(
            QWebEngineSettings.ShowScrollBars, False)
        self.show()

    def on_loaded(self):
        size = self.page().contentsSize().toSize()
        self.resize(size)
        # Wait for resize
        QTimer.singleShot(1000, self.take_screenshot)

    def take_screenshot(self):
        self.grab().save(self.output_file, b'PNG')
        self.app.quit()


app = QApplication(sys.argv)
s = Screenshot()
s.app = app
s.capture('https://pypi.org/project/PyQt5/', 'webpage.png')
sys.exit(app.exec_())

Answer 2

-This code was tested in : QT_VERSION_STR = 5.12.1 , PYQT_VERSION_STR = 5.12

NOTE: QtWebKit got deprecated upstream in Qt 5.5 and removed in 5.6.

Instead it is replaced with "QtWebEngineWidgets". So you have to make changes in code.

For more informations: http://doc.qt.io/qt-5/qtwebenginewidgets-qtwebkitportingguide.html

from PyQt5.QtGui import QPainter, QImage
from PyQt5 import QtWebKitWidgets
from functools import partial



class Screenshot(QtWebKitWidgets.QWebView):
    def __init__(self):
        QtWebKitWidgets.QWebView.__init__(self)

    def capture(self, url, output_file):
        self.load(QUrl(url))
        self.loadFinished.connect(partial(self.onDone, output_file))

    def onDone(self,output_file):
        # set to webpage size
        frame = self.page().mainFrame()
        self.page().setViewportSize(frame.contentsSize())
        # render image
        image = QImage(self.page().viewportSize(), QImage.Format_ARGB32)
        painter = QPainter(image)
        frame.render(painter)
        painter.end()
        image.save(output_file)


s = Screenshot()
s.capture('https://pypi.org/project/PyQt5/', 'C:/Users/user/Desktop/web_page.png')

result: