##// END OF EJS Templates
Added GTK support to ZeroMQ kernel....
Added GTK support to ZeroMQ kernel. We use an approach which is a combination of an gtk timer callback into our execution loop, like we do for Qt and Wx, I've run as tests several GTK examples found on the net, as well as multiple matplotlib scripts, and so far everything works as expected. The only catch is that we silently trap gtk.main_quit(), so examples that call it with a 'close' button or similar seem to not do anything. But their windows close normally and no other problems have been found. This solution uses code taken from an old bug report of ours: https://bugs.launchpad.net/ipython/+bug/270856 specifically the attachment in this comment: https://bugs.launchpad.net/ipython/+bug/270856/comments/6 along with the changes suggested by Michiel de Hoon there. Thanks to Ville and Michiel for that old discussion, which put me on the right track to figure out the details of the logic needed for GTK.

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winprocess.py
264 lines | 9.6 KiB | text/x-python | PythonLexer
# A module to expose various thread/process/job related structures and
# methods from kernel32
#
# The MIT License
#
# Copyright (c) 2006 the Mozilla Foundation <http://www.mozilla.org>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
from ctypes import c_void_p, POINTER, sizeof, Structure, windll, WinError, WINFUNCTYPE
from ctypes.wintypes import BOOL, BYTE, DWORD, HANDLE, LPCWSTR, LPWSTR, UINT, WORD
LPVOID = c_void_p
LPBYTE = POINTER(BYTE)
LPDWORD = POINTER(DWORD)
SW_HIDE = 0
def ErrCheckBool(result, func, args):
"""errcheck function for Windows functions that return a BOOL True
on success"""
if not result:
raise WinError()
return args
# CloseHandle()
CloseHandleProto = WINFUNCTYPE(BOOL, HANDLE)
CloseHandle = CloseHandleProto(("CloseHandle", windll.kernel32))
CloseHandle.errcheck = ErrCheckBool
# AutoHANDLE
class AutoHANDLE(HANDLE):
"""Subclass of HANDLE which will call CloseHandle() on deletion."""
def Close(self):
if self.value:
CloseHandle(self)
self.value = 0
def __del__(self):
self.Close()
def __int__(self):
return self.value
def ErrCheckHandle(result, func, args):
"""errcheck function for Windows functions that return a HANDLE."""
if not result:
raise WinError()
return AutoHANDLE(result)
# PROCESS_INFORMATION structure
class PROCESS_INFORMATION(Structure):
_fields_ = [("hProcess", HANDLE),
("hThread", HANDLE),
("dwProcessID", DWORD),
("dwThreadID", DWORD)]
def __init__(self):
Structure.__init__(self)
self.cb = sizeof(self)
LPPROCESS_INFORMATION = POINTER(PROCESS_INFORMATION)
# STARTUPINFO structure
class STARTUPINFO(Structure):
_fields_ = [("cb", DWORD),
("lpReserved", LPWSTR),
("lpDesktop", LPWSTR),
("lpTitle", LPWSTR),
("dwX", DWORD),
("dwY", DWORD),
("dwXSize", DWORD),
("dwYSize", DWORD),
("dwXCountChars", DWORD),
("dwYCountChars", DWORD),
("dwFillAttribute", DWORD),
("dwFlags", DWORD),
("wShowWindow", WORD),
("cbReserved2", WORD),
("lpReserved2", LPBYTE),
("hStdInput", HANDLE),
("hStdOutput", HANDLE),
("hStdError", HANDLE)
]
LPSTARTUPINFO = POINTER(STARTUPINFO)
STARTF_USESHOWWINDOW = 0x01
STARTF_USESIZE = 0x02
STARTF_USEPOSITION = 0x04
STARTF_USECOUNTCHARS = 0x08
STARTF_USEFILLATTRIBUTE = 0x10
STARTF_RUNFULLSCREEN = 0x20
STARTF_FORCEONFEEDBACK = 0x40
STARTF_FORCEOFFFEEDBACK = 0x80
STARTF_USESTDHANDLES = 0x100
# EnvironmentBlock
class EnvironmentBlock:
"""An object which can be passed as the lpEnv parameter of CreateProcess.
It is initialized with a dictionary."""
def __init__(self, dict):
if not dict:
self._as_parameter_ = None
else:
values = ["%s=%s" % (key, value)
for (key, value) in dict.iteritems()]
values.append("")
self._as_parameter_ = LPCWSTR("\0".join(values))
# CreateProcess()
CreateProcessProto = WINFUNCTYPE(BOOL, # Return type
LPCWSTR, # lpApplicationName
LPWSTR, # lpCommandLine
LPVOID, # lpProcessAttributes
LPVOID, # lpThreadAttributes
BOOL, # bInheritHandles
DWORD, # dwCreationFlags
LPVOID, # lpEnvironment
LPCWSTR, # lpCurrentDirectory
LPSTARTUPINFO, # lpStartupInfo
LPPROCESS_INFORMATION # lpProcessInformation
)
CreateProcessFlags = ((1, "lpApplicationName", None),
(1, "lpCommandLine"),
(1, "lpProcessAttributes", None),
(1, "lpThreadAttributes", None),
(1, "bInheritHandles", True),
(1, "dwCreationFlags", 0),
(1, "lpEnvironment", None),
(1, "lpCurrentDirectory", None),
(1, "lpStartupInfo"),
(2, "lpProcessInformation"))
def ErrCheckCreateProcess(result, func, args):
ErrCheckBool(result, func, args)
# return a tuple (hProcess, hThread, dwProcessID, dwThreadID)
pi = args[9]
return AutoHANDLE(pi.hProcess), AutoHANDLE(pi.hThread), pi.dwProcessID, pi.dwThreadID
CreateProcess = CreateProcessProto(("CreateProcessW", windll.kernel32),
CreateProcessFlags)
CreateProcess.errcheck = ErrCheckCreateProcess
CREATE_BREAKAWAY_FROM_JOB = 0x01000000
CREATE_DEFAULT_ERROR_MODE = 0x04000000
CREATE_NEW_CONSOLE = 0x00000010
CREATE_NEW_PROCESS_GROUP = 0x00000200
CREATE_NO_WINDOW = 0x08000000
CREATE_SUSPENDED = 0x00000004
CREATE_UNICODE_ENVIRONMENT = 0x00000400
DEBUG_ONLY_THIS_PROCESS = 0x00000002
DEBUG_PROCESS = 0x00000001
DETACHED_PROCESS = 0x00000008
# CreateJobObject()
CreateJobObjectProto = WINFUNCTYPE(HANDLE, # Return type
LPVOID, # lpJobAttributes
LPCWSTR # lpName
)
CreateJobObjectFlags = ((1, "lpJobAttributes", None),
(1, "lpName", None))
CreateJobObject = CreateJobObjectProto(("CreateJobObjectW", windll.kernel32),
CreateJobObjectFlags)
CreateJobObject.errcheck = ErrCheckHandle
# AssignProcessToJobObject()
AssignProcessToJobObjectProto = WINFUNCTYPE(BOOL, # Return type
HANDLE, # hJob
HANDLE # hProcess
)
AssignProcessToJobObjectFlags = ((1, "hJob"),
(1, "hProcess"))
AssignProcessToJobObject = AssignProcessToJobObjectProto(
("AssignProcessToJobObject", windll.kernel32),
AssignProcessToJobObjectFlags)
AssignProcessToJobObject.errcheck = ErrCheckBool
# ResumeThread()
def ErrCheckResumeThread(result, func, args):
if result == -1:
raise WinError()
return args
ResumeThreadProto = WINFUNCTYPE(DWORD, # Return type
HANDLE # hThread
)
ResumeThreadFlags = ((1, "hThread"),)
ResumeThread = ResumeThreadProto(("ResumeThread", windll.kernel32),
ResumeThreadFlags)
ResumeThread.errcheck = ErrCheckResumeThread
# TerminateJobObject()
TerminateJobObjectProto = WINFUNCTYPE(BOOL, # Return type
HANDLE, # hJob
UINT # uExitCode
)
TerminateJobObjectFlags = ((1, "hJob"),
(1, "uExitCode", 127))
TerminateJobObject = TerminateJobObjectProto(
("TerminateJobObject", windll.kernel32),
TerminateJobObjectFlags)
TerminateJobObject.errcheck = ErrCheckBool
# WaitForSingleObject()
WaitForSingleObjectProto = WINFUNCTYPE(DWORD, # Return type
HANDLE, # hHandle
DWORD, # dwMilliseconds
)
WaitForSingleObjectFlags = ((1, "hHandle"),
(1, "dwMilliseconds", -1))
WaitForSingleObject = WaitForSingleObjectProto(
("WaitForSingleObject", windll.kernel32),
WaitForSingleObjectFlags)
INFINITE = -1
WAIT_TIMEOUT = 0x0102
WAIT_OBJECT_0 = 0x0
WAIT_ABANDONED = 0x0080
# GetExitCodeProcess()
GetExitCodeProcessProto = WINFUNCTYPE(BOOL, # Return type
HANDLE, # hProcess
LPDWORD, # lpExitCode
)
GetExitCodeProcessFlags = ((1, "hProcess"),
(2, "lpExitCode"))
GetExitCodeProcess = GetExitCodeProcessProto(
("GetExitCodeProcess", windll.kernel32),
GetExitCodeProcessFlags)
GetExitCodeProcess.errcheck = ErrCheckBool