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# Example of embedding CEF Python browser using PyGObject/Gtk library.

# Tested with GTK 3.10 and CEF Python v53+.

from cefpython3 import cefpython as cef

# noinspection PyUnresolvedReferences

from gi.repository import GdkX11, Gtk, GObject, GdkPixbuf

import sys

import os

def main():

print("CEF Python {ver}".format(ver=cef.__version__))

print("Python {ver}".format(ver=sys.version[:6]))

print("GTK {major}.{minor}".format(

major=Gtk.get_major_version(),

minor=Gtk.get_minor_version()))

assert cef.__version__ >= "53.1", "CEF Python v53.1+ required to run this"

sys.excepthook = cef.ExceptHook # To shutdown all CEF processes on error

cef.Initialize()

app = GtkExample()

SystemExit(app.run(sys.argv))

class GtkExample(Gtk.Application):

def __init__(self):

super(GtkExample, self).__init__(application_id='cefpython.gtk')

self.browser = None

self.window = None

def run(self, argv):

GObject.threads_init()

GObject.timeout_add(10, self.on_timer)

self.connect("activate", self.on_activate)

self.connect("shutdown", self.on_shutdown)

return super(GtkExample, self).run(argv)

def on_timer(self):

cef.MessageLoopWork()

return True

def on_activate(self, *_):

self.window = Gtk.ApplicationWindow.new(self)

self.window.set_title("Gtk example")

self.window.set_default_size(800, 600)

self.window.connect("configure-event", self.on_configure)

self.window.connect("size-allocate", self.on_size_allocate)

self.window.connect("focus-in-event", self.on_focus_in)

self.window.connect("delete-event", self.on_window_close)

self.setup_icon()

self.window.realize()

window_info = cef.WindowInfo()

window_info.SetAsChild(self.window.get_property("window").get_xid())

self.browser = cef.CreateBrowserSync(window_info,

url="https://www.google.com/")

self.window.show_all()

def on_configure(self, *_):

if self.browser:

self.browser.NotifyMoveOrResizeStarted()

return False

def on_size_allocate(self, _, data):

if self.browser:

self.browser.SetBounds(data.x, data.y, data.width, data.height)

def on_focus_in(self, *_):

if self.browser:

self.browser.SetFocus(True)

return True

return False

def on_window_close(self, *_):

# Close browser and free reference by setting to None

self.browser.CloseBrowser(True)

self.browser = None

def on_shutdown(self, *_):

cef.Shutdown()

def setup_icon(self):

icon = os.path.join(os.path.dirname(__file__), "resources", "gtk.png")

if not os.path.exists(icon):

return

pixbuf = GdkPixbuf.Pixbuf.new_from_file(icon)

transparent = pixbuf.add_alpha(True, 0xff, 0xff, 0xff)

Gtk.Window.set_default_icon_list([transparent])

if __name__ == '__main__':

main()

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