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235 lines (205 loc) · 8.44 KB
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# An example of embedding CEF browser in wxPython on Linux.
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 wx
import time
import re
import uuid
# Which method to use for message loop processing.
# EVT_IDLE - wx application has priority (default)
# EVT_TIMER - cef browser has priority
# It seems that Flash content behaves better when using a timer.
# IMPORTANT! On Linux EVT_IDLE does not work, the events seems to
# be propagated only when you move your mouse, which is not the
# expected behavior, it is recommended to use EVT_TIMER on Linux,
# so set this value to False.
USE_EVT_IDLE = False
def GetApplicationPath(file=None):
import re, os, platform
# 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
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" (os._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 MainFrame(wx.Frame):
browser = None
mainPanel = None
def __init__(self):
wx.Frame.__init__(self, parent=None, id=wx.ID_ANY,
title='wxPython CEF 3 example', size=(800,600))
self.CreateMenu()
# Cannot attach browser to the main frame as this will cause
# the menu not to work.
self.mainPanel = wx.Panel(self)
windowInfo = cefpython.WindowInfo()
windowInfo.SetAsChild(self.mainPanel.GetGtkWidget())
# Linux requires adding "file://" for local files,
# otherwise /home/some will be replaced as http://home/some
self.browser = cefpython.CreateBrowserSync(
windowInfo,
# If there are problems with Flash you can disable it here,
# by disabling all plugins.
browserSettings={"plugins_disabled": False},
navigateUrl="file://"+GetApplicationPath("wxpython.html"))
jsBindings = cefpython.JavascriptBindings(
bindToFrames=False, bindToPopups=True)
jsBindings.SetFunction("PyPrint", PyPrint)
jsBindings.SetProperty("pyProperty", "This was set in Python")
jsBindings.SetProperty("pyConfig", ["This was set in Python",
{"name": "Nested dictionary", "isNested": True},
[1,"2", None]])
jsBindings.SetObject("external", JavascriptExternal(self.browser))
self.browser.SetJavascriptBindings(jsBindings)
self.Bind(wx.EVT_CLOSE, self.OnClose)
if USE_EVT_IDLE:
# Bind EVT_IDLE only for the main application frame.
self.Bind(wx.EVT_IDLE, self.OnIdle)
def CreateMenu(self):
filemenu = wx.Menu()
filemenu.Append(1, "Open")
exit = filemenu.Append(2, "Exit")
self.Bind(wx.EVT_MENU, self.OnClose, exit)
aboutmenu = wx.Menu()
aboutmenu.Append(1, "CEF Python")
menubar = wx.MenuBar()
menubar.Append(filemenu,"&File")
menubar.Append(aboutmenu, "&About")
self.SetMenuBar(menubar)
def OnClose(self, event):
self.browser.CloseBrowser()
self.Destroy()
def OnIdle(self, event):
cefpython.MessageLoopWork()
def PyPrint(message):
print(message)
class JavascriptExternal:
mainBrowser = None
def __init__(self, mainBrowser):
self.mainBrowser = mainBrowser
def Print(self, message):
print(message)
def TestAllTypes(self, *args):
print(args)
def ExecuteFunction(self, *args):
self.mainBrowser.GetMainFrame().ExecuteFunction(*args)
def TestJSCallback(self, jsCallback):
print("jsCallback.GetFunctionName() = %s" % jsCallback.GetFunctionName())
print("jsCallback.GetFrame().GetIdentifier() = %s" % \
jsCallback.GetFrame().GetIdentifier())
jsCallback.Call("This message was sent from python using js callback")
def TestJSCallbackComplexArguments(self, jsObject):
jsCallback = jsObject["myCallback"];
jsCallback.Call(1, None, 2.14, "string", ["list", ["nested list", \
{"nested object":None}]], \
{"nested list next":[{"deeply nested object":1}]})
def TestPythonCallback(self, jsCallback):
jsCallback.Call(self.PyCallback)
def PyCallback(self, *args):
message = "PyCallback() was executed successfully! Arguments: %s" \
% str(args)
print(message)
self.mainBrowser.GetMainFrame().ExecuteJavascript(
"window.alert(\"%s\")" % message)
class MyApp(wx.App):
timer = None
timerID = 1
timerCount = 0
def OnInit(self):
if not USE_EVT_IDLE:
self.CreateTimer()
frame = MainFrame()
self.SetTopWindow(frame)
frame.Show()
return True
def CreateTimer(self):
# See "Making a render loop":
# http://wiki.wxwidgets.org/Making_a_render_loop
# Another approach is to use EVT_IDLE in MainFrame,
# see which one fits you better.
self.timer = wx.Timer(self, self.timerID)
self.timer.Start(10) # 10ms
wx.EVT_TIMER(self, self.timerID, self.OnTimer)
def OnTimer(self, event):
self.timerCount += 1
# print("wxpython.py: OnTimer() %d" % self.timerCount)
cefpython.MessageLoopWork()
def OnExit(self):
# When app.MainLoop() returns, MessageLoopWork() should
# not be called anymore.
if not USE_EVT_IDLE:
self.timer.Stop()
if __name__ == '__main__':
sys.excepthook = ExceptHook
cefpython.g_debug = True
cefpython.g_debugFile = GetApplicationPath("debug.log")
settings = {
"log_severity": cefpython.LOGSEVERITY_INFO, # LOGSEVERITY_VERBOSE
"log_file": GetApplicationPath("debug.log"),
"release_dcheck_enabled": True, # Enable only when debugging.
# 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")
}
# print("browser_subprocess_path="+settings["browser_subprocess_path"])
cefpython.Initialize(settings)
print('wx.version=%s' % wx.version())
app = MyApp(False)
app.MainLoop()
# Let wx.App destructor do the cleanup before calling cefpython.Shutdown().
del app
cefpython.Shutdown()