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pyside.py
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188 lines (164 loc) · 6.87 KB
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# An example of embedding CEF Python in PySide application.
import os, sys
libcef_dll = os.path.join(os.path.dirname(os.path.abspath(__file__)),
'libcef.dll')
if os.path.exists(libcef_dll):
# Import a local module
if (2,7) <= sys.version_info < (2,8):
import cefpython_py27 as cefpython
elif (3,4) <= sys.version_info < (3,4):
import cefpython_py34 as cefpython
else:
raise Exception("Unsupported python version: %s" % sys.version)
else:
# Import an installed package
from cefpython3 import cefpython
import PySide
from PySide import QtGui
from PySide import QtCore
import ctypes
def GetApplicationPath(file=None):
import re, os, platform
# On Windows after downloading file and calling Browser.GoForward(),
# current working directory is set to %UserProfile%.
# Calling os.path.dirname(os.path.realpath(__file__))
# returns for eg. "C:\Users\user\Downloads". A solution
# is to cache path on first call.
if not hasattr(GetApplicationPath, "dir"):
if hasattr(sys, "frozen"):
dir = os.path.dirname(sys.executable)
elif "__file__" in globals():
dir = os.path.dirname(os.path.realpath(__file__))
else:
dir = os.getcwd()
GetApplicationPath.dir = dir
# 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)):
path = GetApplicationPath.dir + 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 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(1024, 768)
self.setWindowTitle('PySide 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().winIdFixed()), 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.winIdFixed()))
self.browser = cefpython.CreateBrowserSync(windowInfo,
browserSettings={},
navigateUrl=GetApplicationPath("example.html"))
self.show()
def winIdFixed(self):
# PySide bug: QWidget.winId() returns <PyCObject object at 0x02FD8788>,
# there is no easy way to convert it to int.
try:
return int(self.winId())
except:
if sys.version_info[0] == 2:
ctypes.pythonapi.PyCObject_AsVoidPtr.restype = ctypes.c_void_p
ctypes.pythonapi.PyCObject_AsVoidPtr.argtypes = [ctypes.py_object]
return ctypes.pythonapi.PyCObject_AsVoidPtr(self.winId())
elif sys.version_info[0] == 3:
ctypes.pythonapi.PyCapsule_GetPointer.restype = ctypes.c_void_p
ctypes.pythonapi.PyCapsule_GetPointer.argtypes = [ctypes.py_object]
return ctypes.pythonapi.PyCapsule_GetPointer(self.winId(), None)
def moveEvent(self, event):
cefpython.WindowUtils.OnSize(int(self.winIdFixed()), 0, 0, 0)
def resizeEvent(self, event):
cefpython.WindowUtils.OnSize(int(self.winIdFixed()), 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("PySide version: %s" % PySide.__version__)
print("QtCore version: %s" % QtCore.__version__)
sys.excepthook = ExceptHook
settings = {}
settings["log_file"] = GetApplicationPath("debug.log")
settings["log_severity"] = cefpython.LOGSEVERITY_INFO
settings["browser_subprocess_path"] = "%s/%s" % (
cefpython.GetModuleDirectory(), "subprocess")
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()