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# An example of embedding CEF Python in PyQt4 application.

import platform

if platform.architecture()[0] != "32bit":

raise Exception("Only 32bit architecture is supported")

import os, sys

libcef_dll = os.path.join(os.path.dirname(os.path.abspath(__file__)),

'libcef.dll')

if os.path.exists(libcef_dll):

# Import the local module.

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

import cefpython_py27 as cefpython

elif 0x03000000 <= sys.hexversion < 0x04000000:

import cefpython_py32 as cefpython

else:

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

else:

# Import the package.

from cefpython1 import cefpython

from PyQt4 import QtGui

from PyQt4 import QtCore

def GetApplicationPath(file=None):

import re, os

# 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)):

if hasattr(sys, "frozen"):

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

elif "__file__" in globals():

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

else:

path = os.getcwd()

path = path + os.sep + file

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("cefpython: 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 MainWindow(QtGui.QMainWindow):

mainFrame = None

def __init__(self):

super(MainWindow, self).__init__(None)

self.createMenu()

self.mainFrame = MainFrame(self)

self.setCentralWidget(self.mainFrame)

self.resize(600, 480)

self.setWindowTitle('PyQT example')

self.setFocusPolicy(QtCore.Qt.StrongFocus)

def createMenu(self):

menubar = self.menuBar()

filemenu = menubar.addMenu("&File")

filemenu.addAction(QtGui.QAction("Open", self))

filemenu.addAction(QtGui.QAction("Exit", self))

aboutmenu = menubar.addMenu("&About")

def focusInEvent(self, event):

cefpython.WindowUtils.OnSetFocus(int(self.centralWidget().winId()), 0, 0, 0)

def closeEvent(self, event):

self.mainFrame.browser.CloseBrowser()

class MainFrame(QtGui.QWidget):

browser = None

def __init__(self, parent=None):

super(MainFrame, self).__init__(parent)

windowInfo = cefpython.WindowInfo()

windowInfo.SetAsChild(int(self.winId()))

self.browser = cefpython.CreateBrowserSync(windowInfo,

browserSettings={},

navigateUrl=GetApplicationPath("cefsimple.html"))

self.show()

def moveEvent(self, event):

cefpython.WindowUtils.OnSize(int(self.winId()), 0, 0, 0)

def resizeEvent(self, event):

cefpython.WindowUtils.OnSize(int(self.winId()), 0, 0, 0)

class CefApplication(QtGui.QApplication):

timer = None

def __init__(self, args):

super(CefApplication, self).__init__(args)

self.createTimer()

def createTimer(self):

self.timer = QtCore.QTimer()

self.timer.timeout.connect(self.onTimer)

self.timer.start(10)

def onTimer(self):

# The proper way of doing message loop should be:

# 1. In createTimer() call self.timer.start(0)

# 2. In onTimer() call MessageLoopWork() only when

# QtGui.QApplication.instance()->hasPendingEvents() returns False.

# But... there is a bug in Qt, hasPendingEvents() returns always true.

cefpython.MessageLoopWork()

def stopTimer(self):

# Stop the timer after Qt message loop ended, calls to MessageLoopWork()

# should not happen anymore.

self.timer.stop()

if __name__ == '__main__':

print("PyQt version: %s" % QtCore.PYQT_VERSION_STR)

print("QtCore version: %s" % QtCore.qVersion())

sys.excepthook = ExceptHook

settings = {

"log_severity": cefpython.LOGSEVERITY_INFO,

"log_file": GetApplicationPath("debug.log"),

"release_dcheck_enabled": True # Enable only when debugging.

}

cefpython.Initialize(settings)

app = CefApplication(sys.argv)

mainWindow = MainWindow()

mainWindow.show()

app.exec_()

app.stopTimer()

# Need to destroy QApplication(), otherwise Shutdown() fails.

# Unset main window also just to be safe.

del mainWindow

del app

cefpython.Shutdown()

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