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# An example of embedding the CEF browser in PyGTK on Linux.

# Tested with GTK "2.24.10".

# The official CEF Python binaries come with tcmalloc hook

# disabled. But if you've built custom binaries and kept tcmalloc

# hook enabled, then be aware that in such case it is required

# for the cefpython module to be the very first import in

# python scripts. See Issue 73 in the CEF Python Issue Tracker

# for more details.

import ctypes, os, sys

libcef_so = os.path.join(os.path.dirname(os.path.abspath(__file__)),\

'libcef.so')

if os.path.exists(libcef_so):

# Import local module

ctypes.CDLL(libcef_so, ctypes.RTLD_GLOBAL)

if 0x02070000 <= sys.hexversion < 0x03000000:

import cefpython_py27 as cefpython

else:

raise Exception("Unsupported python version: %s" % sys.version)

else:

# Import from package

from cefpython3 import cefpython

import pygtk

pygtk.require('2.0')

import gtk

import gobject

import re

def GetApplicationPath(file=None):

import re, os, platform

# On Windows after downloading file and calling Browser.GoForward(),

# current working directory is set to %UserProfile%.

# Calling os.path.dirname(os.path.realpath(__file__))

# returns for eg. "C:\Users\user\Downloads". A solution

# is to cache path on first call.

if not hasattr(GetApplicationPath, "dir"):

if hasattr(sys, "frozen"):

dir = os.path.dirname(sys.executable)

elif "__file__" in globals():

dir = os.path.dirname(os.path.realpath(__file__))

else:

dir = os.getcwd()

GetApplicationPath.dir = dir

# If file is None return current directory without trailing slash.

if file is None:

file = ""

# Only when relative path.

if not file.startswith("/") and not file.startswith("\\") and (

not re.search(r"^[\w-]+:", file)):

path = GetApplicationPath.dir + os.sep + file

if platform.system() == "Windows":

path = re.sub(r"[/\\]+", re.escape(os.sep), path)

path = re.sub(r"[/\\]+$", "", path)

return path

return str(file)

def ExceptHook(excType, excValue, traceObject):

import traceback, os, time, codecs

# This hook does the following: in case of exception write it to

# the "error.log" file, display it to the console, shutdown CEF

# and exit application immediately by ignoring "finally" (_exit()).

errorMsg = "\n".join(traceback.format_exception(excType, excValue,

traceObject))

errorFile = GetApplicationPath("error.log")

try:

appEncoding = cefpython.g_applicationSettings["string_encoding"]

except:

appEncoding = "utf-8"

if type(errorMsg) == bytes:

errorMsg = errorMsg.decode(encoding=appEncoding, errors="replace")

try:

with codecs.open(errorFile, mode="a", encoding=appEncoding) as fp:

fp.write("\n[%s] %s\n" % (

time.strftime("%Y-%m-%d %H:%M:%S"), errorMsg))

except:

print("[pygtk_.py]: WARNING: failed writing to error file: %s" % (

errorFile))

# Convert error message to ascii before printing, otherwise

# you may get error like this:

# | UnicodeEncodeError: 'charmap' codec can't encode characters

errorMsg = errorMsg.encode("ascii", errors="replace")

errorMsg = errorMsg.decode("ascii", errors="replace")

print("\n"+errorMsg+"\n")

cefpython.QuitMessageLoop()

cefpython.Shutdown()

os._exit(1)

class PyGTKExample:

mainWindow = None

container = None

browser = None

exiting = None

searchEntry = None

vbox = None

def __init__(self):

self.mainWindow = gtk.Window(gtk.WINDOW_TOPLEVEL)

self.mainWindow.connect('destroy', self.OnExit)

self.mainWindow.set_size_request(width=800, height=600)

self.mainWindow.set_title('PyGTK CEF example')

self.mainWindow.realize()

self.vbox = gtk.VBox(False, 0)

self.vbox.pack_start(self.CreateMenu(), False, False, 0)

self.mainWindow.add(self.vbox)

m = re.search("GtkVBox at 0x(\w+)", str(self.vbox))

hexID = m.group(1)

windowID = int(hexID, 16)

windowInfo = cefpython.WindowInfo()

windowInfo.SetAsChild(windowID)

# Linux requires adding "file://" for local files,

# otherwise /home/some will be replaced as http://home/some

self.browser = cefpython.CreateBrowserSync(

windowInfo,

browserSettings={},

navigateUrl="file://"+GetApplicationPath("example.html"))

self.vbox.show()

self.mainWindow.show()

gobject.timeout_add(10, self.OnTimer)

def CreateMenu(self):

file = gtk.MenuItem('File')

file.show()

filemenu = gtk.Menu()

item = gtk.MenuItem('Open')

filemenu.append(item)

item.show()

item = gtk.MenuItem('Exit')

filemenu.append(item)

item.show()

file.set_submenu(filemenu)

about = gtk.MenuItem('About')

about.show()

aboutmenu = gtk.Menu()

item = gtk.MenuItem('CEF Python')

aboutmenu.append(item)

item.show()

about.set_submenu(aboutmenu)

menubar = gtk.MenuBar()

menubar.append(file)

menubar.append(about)

menubar.show()

return menubar

def OnWidgetClick(self, widget, data):

self.mainWindow.get_window().focus()

def OnTimer(self):

if self.exiting:

return False

cefpython.MessageLoopWork()

return True

def OnFocusIn(self, widget, data):

# This function is currently not called by any of code,

# but if you would like for browser to have automatic focus

# add such line:

# self.mainWindow.connect('focus-in-event', self.OnFocusIn)

self.browser.SetFocus(True)

def OnExit(self, widget, data=None):

self.exiting = True

gtk.main_quit()

if __name__ == '__main__':

version = '.'.join(map(str, list(gtk.gtk_version)))

print('[pygtk_.py] GTK version: %s' % version)

# Intercept python exceptions. Exit app immediately when exception

# happens on any of the threads.

sys.excepthook = ExceptHook

# Application settings

settings = {

"debug": True, # cefpython debug messages in console and in log_file

"log_severity": cefpython.LOGSEVERITY_INFO, # LOGSEVERITY_VERBOSE

"log_file": GetApplicationPath("debug.log"), # Set to "" to disable

# This directories must be set on Linux

"locales_dir_path": cefpython.GetModuleDirectory()+"/locales",

"resources_dir_path": cefpython.GetModuleDirectory(),

"browser_subprocess_path": "%s/%s" % (

cefpython.GetModuleDirectory(), "subprocess"),

}

cefpython.Initialize(settings)

gobject.threads_init() # Timer for the message loop

PyGTKExample()

gtk.main()

cefpython.Shutdown()

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