def initialize():
global mainFrame
if mainFrame:
raise RuntimeError("GUI already initialized")
mainFrame = MainFrame()
wxLang = core.getWxLangOrNone()
if wxLang:
# otherwise the system default will be used
mainFrame.SetLayoutDirection(wxLang.LayoutDirection)
wx.GetApp().SetTopWindow(mainFrame)
# In wxPython >= 4.1,
# wx.CallAfter no longer executes callbacks while NVDA's main thread is within apopup menu or message box.
# To work around this,
# Monkeypatch wx.CallAfter to
# post a WM_NULL message to our top-level window after calling the original CallAfter,
# which causes wx's event loop to wake up enough to execute the callback.
old_wx_CallAfter = wx.CallAfter
def wx_CallAfter_wrapper(func, *args, **kwargs):
old_wx_CallAfter(func, *args, **kwargs)
# mainFrame may be None as NVDA could be terminating.
topHandle = mainFrame.Handle if mainFrame else None
if topHandle:
winUser.PostMessage(topHandle, winUser.WM_NULL, 0, 0)
wx.CallAfter = wx_CallAfter_wrapper
def initialize():
global mainFrame
if mainFrame:
raise RuntimeError("GUI already initialized")
mainFrame = MainFrame()
wxLang = core.getWxLangOrNone()
if wxLang:
# otherwise the system default will be used
mainFrame.SetLayoutDirection(wxLang.LayoutDirection)
wx.GetApp().SetTopWindow(mainFrame)
import monkeyPatches
monkeyPatches.applyWxMonkeyPatches(mainFrame, winUser, wx)
