How to install a simple web browser

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A simple web browser based on Qt5 can be easily installed using the package repository for OpenSTLinux distribution service.

2 solutions exist:

Qt^® application
Qt^® Python™ application

1. qt-wpe-simple-browser[edit source]

1.1. Installation[edit source]

 apt-get update
 apt-get install qt-wpe-simple-browser

1.2. Usage[edit source]

 qt-wpe-simple-browser <url http://>

2. python3-pyqt5[edit source]

2.1. Installation[edit source]

 apt-get update
 apt-get install python3-pyqt5

Create the web_browser.py script:

# web_browser.py
# Copyright (c) STMicroelectronics
# License: BSD-3-Clause
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtWebKitWidgets import *

import sys

class MainWindow(QMainWindow):

    def __init__(self, *args, **kwargs):
        super(MainWindow,self).__init__(*args, **kwargs)

        self.setWindowTitle(sys.argv[1])
        self.browser = QWebView()
        self.browser.setUrl( QUrl(sys.argv[1]) )
        self.setCentralWidget(self.browser)
        self.show()

QApplication.setAttribute(Qt.AA_ShareOpenGLContexts)
app = QApplication(sys.argv)
window = MainWindow()
app.exec_()

2.2. Usage[edit source]

 python3 web_browser.py  <url http://>

3. Display platform[edit source]

Two solutions exist to display the web browser:

using eglfs
using Wayland

3.1. wayland[edit source]

Weston must be started. If you have stopped it, you can restart Weston with the following command

 systemctl start weston@root

Install qtwayland

 apt-get install qtwayland

Set Wayland egl as display platform

 export QT_QPA_PLATFORM=wayland-egl

Launch the Python web browser

 qt-wpe-simple-browser <url http://>

or

 python3 web_browser.py  <url http://>

3.2. eglfs[edit source]

Stop the Weston application

 systemctl stop weston@root

Set eglfs as display platform

 export QT_QPA_PLATFORM=eglfs

And set the following variables

 export QML2_IMPORT_PATH='/usr/lib/qt5/qml/'
 export QT_QPA_EGLFS_ALWAYS_SET_MODE='1'

Launch the web browser

 qt-wpe-simple-browser <url http://>

or

 python3 web_browser.py  <url http://>

Information

With HDMI connection, it is advised to use the following kms eglfs_config.json config file in order to avoid cursor rendering issue.

{
  "device": "/dev/dri/card0",
  "hwcursor": false,
  "pbuffers": true,
  "outputs": [
    {
      "name": "HDMI1",
      "mode": "1280x720"
    }
  ]
}

Set Qt variable to use the json config file:

Board $> export QT_QPA_EGLFS_KMS_CONFIG='/home/root/eglfs_config.json'