print("[gkt3.py] CEF Python {ver}".format(ver=cef.__version__))

print("[gkt3.py] Python {ver}".format(ver=sys.version[:6]))

print("[gkt3.py] 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 = Gtk3Example()

def __init__(self):

super(Gtk3Example, self).__init__(application_id='cefpython.gtk3')

self.browser = None

self.window = None

self.win32_handle = 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(Gtk3Example, self).run(argv)

def get_handle(self):

if LINUX:

return self.window.get_property("window").get_xid()

elif WINDOWS:

Gdk.threads_enter()

ctypes.pythonapi.PyCapsule_GetPointer.restype = ctypes.c_void_p

ctypes.pythonapi.PyCapsule_GetPointer.argtypes = \

[ctypes.py_object]

gpointer = ctypes.pythonapi.PyCapsule_GetPointer(

self.window.get_property("window").__gpointer__, None)

gdk_dll = ctypes.CDLL("libgdk-3-0.dll")

self.win32_handle = gdk_dll.gdk_win32_window_get_handle(

gpointer)

Gdk.threads_leave()

return self.win32_handle

def on_timer(self):

cef.MessageLoopWork()

return True

def on_activate(self, *_):

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

self.window.set_title("GTK 3 example (PyGObject)")

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.get_handle())

self.browser = cef.CreateBrowserSync(window_info,

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

self.window.show_all()

# Must set size of the window again after it was shown,

# otherwise browser occupies only part of the window area.

self.window.resize(*self.window.get_default_size())

def on_configure(self, *_):

if self.browser:

self.browser.NotifyMoveOrResizeStarted()

return False

def on_size_allocate(self, _, data):

if self.browser:

if WINDOWS:

WindowUtils.OnSize(self.win32_handle, 0, 0, 0)

elif LINUX:

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)