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QWebView does not load external CSS

I am using QWebView to display some content, and I want to use custom CSS to generate output. I found that I can use the method QWebSettings.setUserStyleSheetUrl()to load my own CSS into the view. The file .cssis in the same directory as my main program.

self.webview = QWebView(MainWindow)
self.webview.settings().setUserStyleSheetUrl(QUrl.fromLocalFile("myCustom.css"))

However, custom styles do not load when I add content to the page with setHtml(). I tested that CSS applies correctly to HTML in a standard browser.

Any idea what I'm doing wrong?

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3 answers

Qt , .

, :

path = os.getcwd()
self.webview.settings().setUserStyleSheetUrl(QUrl.fromLocalFile(path + "/myCustom.css"))

. , - .

+7

Qt , .

. .

#include <QtCore>
#include <QtGui>
#include <QtWebKit>

int main(int argc, char ** argv)
{
    QApplication app(argc, argv);

    QMainWindow mainWindow;

    QWebView* webView = new QWebView(&mainWindow);
    webView->settings()->setUserStyleSheetUrl(QUrl::fromLocalFile("google.css"));

    QFile source("google.html");
    source.open(QIODevice::ReadOnly);
    webView->page()->mainFrame()->setHtml(QString::fromUtf8(source.readAll().constData()));

    mainWindow.setCentralWidget(webView);
    mainWindow.show();

    return app.exec();
}

.css .

, , .

+1

, ; .html .css , python script; script .

, python/PyQt4, , - - , setHtml.

:

compare_qtwebkit-test.py

setHtml, , c3, file:// + . (EDIT: , , " arora ( QtWebKit), , , , -." "

script :

$ lsb_release --description --codename 
Description:    Ubuntu 11.04
Codename:   natty

$ apt-show-versions -r python-qt4
python-qt4/natty uptodate 4.8.3-2
python-qt4-dbus/natty uptodate 4.8.3-2

$ apt-show-versions -r libqtwebkit4
libqtwebkit4/natty uptodate 2.1~really2.0.2-0ubuntu1

$ python --version
Python 2.7.1+

script:

qtwebkit-test.py

#!/usr/bin/env python

# portions from:
# http://pysnippet.blogspot.com/2010/01/more-fun-with-qwebkit.html

import sys
import os
from PyQt4 import QtCore
from PyQt4 import QtGui
from PyQt4 import QtWebKit

global htmltext

def GenerateFiles():
  global htmltext

  print "GenerateFiles running"

  csstext = """
  body {
    background-color: #058;
    margin: 0px;
    color: red;
  }
  """

  css_file = open("test.css", "w")
  css_file.write(csstext)
  css_file.close()


  htmltextTop = """
  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  <html>
  <head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  """

  htmltextBottom = """
  <title>qtwebkit-test</title>
  </head>
  <body>
  <h1>HEADING</h1>
  <p>Just to test ....</p>
  <p>.... and test some more</p>
  </body>
  </html>
  """

  cssopen = '<link rel="stylesheet" type="text/css" href="'
  cssclose = '">'

  # c1
  cssfile = "test.css"
  # c2
  #~ cssfile = os.path.abspath(os.path.dirname(__file__)) + "/" + "test.css"
  # c3
  #~ cssfile = "file://" + os.path.abspath(os.path.dirname(__file__)) + "/" + "test.css"
  # c4
  #~ cssfile = "qrc://" + os.path.abspath(os.path.dirname(__file__)) + "/" + "test.css"
  # c5 (empty)
  #~ cssfile = ""

  cssline = cssopen + cssfile + cssclose

  #~ htmltext = htmltextTop + htmltextBottom      # without css
  htmltext = htmltextTop + cssline + htmltextBottom

  html_file = open("test.html", "w")
  html_file.write(htmltext)
  html_file.close()


def main():
  global htmltext

  GenerateFiles()
  qApp = QtGui.QApplication(sys.argv)

  webView = QtWebKit.QWebView()

  # l1
  #~ webView.load(QtCore.QUrl.fromLocalFile("test.html")) # fails

  # l2
  #~ webView.load(QtCore.QUrl.fromLocalFile("./test.html")) # fails

  # l3
  #~ webView.load(QtCore.QUrl.fromLocalFile(os.path.abspath(os.path.dirname(__file__)) + "/" + "test.html")) # this works with #c1-#c3

  # setHtml
  #print htmltext
  webView.setHtml(htmltext) # works with #c3 (rest are unstyled)

  webView.show()
  webView.resize(500, 400)
  webView.setWindowTitle(__file__)
  sys.exit(qApp.exec_())


if __name__ == "__main__":
    main()
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Source: https://habr.com/ru/post/1733733/

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