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192 lines (156 loc) · 6.53 KB
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# Example of embedding CEF Python browser using wxPython library.
# This example has a top menu and a browser widget without navigation bar.
# To install wxPython on Linux type "sudo apt-get install python-wxtools".
# Tested with wxPython 2.8 on Linux, wxPython 3.0 on Windows/Mac
# and CEF Python v55.3+.
import wx
from cefpython3 import cefpython as cef
import platform
import sys
import os
# Constants
LINUX = (platform.system() == "Linux")
WINDOWS = (platform.system() == "Windows")
WIDTH = 800
HEIGHT = 600
def main():
check_versions()
sys.excepthook = cef.ExceptHook # To shutdown all CEF processes on error
settings = {}
if WINDOWS:
# High DPI support
settings["auto_zooming"] = "system_dpi"
# Embed DPI awareness xml manifest inside .exe (recommended,
# most reliable) or call the SetProcessDpiAware function.
# noinspection PyUnresolvedReferences
cef.DpiAware.SetProcessDpiAware()
cef.Initialize(settings=settings)
app = CefApp(False)
app.MainLoop()
del app # Must destroy before calling Shutdown
cef.Shutdown()
def check_versions():
print("[wxpython.py] CEF Python {ver}".format(ver=cef.__version__))
print("[wxpython.py] Python {ver}".format(ver=sys.version[:6]))
print("[wxpython.py] wx {ver}".format(ver=wx.version()))
# CEF Python version requirement
assert cef.__version__ >= "55.3", "CEF Python v55.3+ required to run this"
class MainFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, parent=None, id=wx.ID_ANY,
title='wxPython example', size=(WIDTH, HEIGHT))
self.browser = None
self.setup_icon()
self.create_menu()
self.Bind(wx.EVT_CLOSE, self.OnClose)
# Set wx.WANTS_CHARS style for the keyboard to work.
# This style also needs to be set for all parent controls.
self.browser_panel = wx.Panel(self, style=wx.WANTS_CHARS)
self.browser_panel.Bind(wx.EVT_SET_FOCUS, self.OnSetFocus)
self.browser_panel.Bind(wx.EVT_SIZE, self.OnSize)
# Must show so that handle is available when embedding browser
self.Show()
self.embed_browser()
def setup_icon(self):
icon_file = os.path.join(os.path.abspath(os.path.dirname(__file__)),
"resources", "wxpython.png")
if os.path.exists(icon_file):
icon = wx.IconFromBitmap(wx.Bitmap(icon_file, wx.BITMAP_TYPE_PNG))
self.SetIcon(icon)
def create_menu(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 embed_browser(self):
window_info = cef.WindowInfo()
window_info.SetAsChild(self.browser_panel.GetHandle())
self.browser = cef.CreateBrowserSync(window_info,
url="https://www.google.com/")
self.browser.SetClientHandler(FocusHandler())
def OnSetFocus(self, _):
if not self.brower:
return
if WINDOWS:
# noinspection PyUnresolvedReferences
cef.WindowUtils.OnSetFocus(self.GetHandleForBrowser(), 0, 0, 0)
self.browser.SetFocus(True)
def OnSize(self, _):
if not self.browser:
return
if WINDOWS:
# noinspection PyUnresolvedReferences
cef.WindowUtils.OnSize(self.GetHandleForBrowser(), 0, 0, 0)
elif LINUX:
(x, y) = (0, 0)
(width, height) = self.browser_panel.GetSizeTuple()
# noinspection PyUnresolvedReferences
self.browser.SetBounds(x, y, width, height)
self.browser.NotifyMoveOrResizeStarted()
def OnClose(self, event):
# In cefpython3.wx.chromectrl example calling browser.CloseBrowser()
# and/or self.Destroy() in OnClose is causing crashes when
# embedding multiple browser tabs. The solution is to call only
# browser.ParentWindowWillClose. Behavior of this example
# seems different as it extends wx.Frame, while ChromeWindow
# from chromectrl extends wx.Window. Calling CloseBrowser
# and Destroy does not cause crashes, but is not recommended.
# Call ParentWindowWillClose and event.Skip() instead. See
# also Issue #107: https://github.com/cztomczak/cefpython/issues/107
self.browser.ParentWindowWillClose()
event.Skip()
# Clear all browser references for CEF to shutdown cleanly
del self.browser
class FocusHandler(object):
def __init__(self):
pass
def OnTakeFocus(self, **kwargs):
# print("[wxpython.py] FocusHandler.OnTakeFocus, next={next}"
# .format(next=kwargs["next_component"]]))
pass
def OnSetFocus(self, **kwargs):
# source_enum = {cef.FOCUS_SOURCE_NAVIGATION: "navigation",
# cef.FOCUS_SOURCE_SYSTEM: "system"}
# print("[wxpython.py] FocusHandler.OnSetFocus, source={source}"
# .format(source=source_enum[kwargs["source"]]))
# return False
pass
def OnGotFocus(self, browser, **_):
# Temporary fix for focus issues on Linux (Issue #284).
# If this is not applied then when switching to another
# window (alt+tab) and then back to this example, keyboard
# focus becomes broken, you can't type anything, even
# though a type cursor blinks in web view.
print("[wxpython.py] FocusHandler.OnGotFocus:"
" keyboard focus fix (#284)")
browser.SetFocus(True)
class CefApp(wx.App):
def __init__(self, redirect):
self.timer = None
self.timer_id = 1
super(CefApp, self).__init__(redirect=redirect)
def OnInit(self):
self.create_timer()
frame = MainFrame()
self.SetTopWindow(frame)
frame.Show()
return True
def create_timer(self):
# See also "Making a render loop":
# http://wiki.wxwidgets.org/Making_a_render_loop
# Another way would be to use EVT_IDLE in MainFrame.
self.timer = wx.Timer(self, self.timer_id)
self.timer.Start(10) # 10ms
wx.EVT_TIMER(self, self.timer_id, self.on_timer)
def on_timer(self, _):
cef.MessageLoopWork()
def OnExit(self):
self.timer.Stop()
if __name__ == '__main__':
main()