I'm trying to implement IVirtualDesktopManager interface (and hopefully IVirtualDesktopManagerInternal afterward) in Python based on this SO answer, but I'm stuck.
Edit: I want a working example in Python that will at least lead me to the implementation of IsWindowOnCurrentVirtualDesktop method - it should return a Boolean when a hwnd is passed to it.
Using pywin32 I'm able to get to some point in the process, but I'm not sure neither if I even can do that in pure Python nor how to continue:
# bypythoncom.py
import pythoncom
import pywintypes
"""IServiceProvider* pServiceProvider = NULL;
HRESULT hr = ::CoCreateInstance(
CLSID_ImmersiveShell, NULL, CLSCTX_LOCAL_SERVER,
__uuidof(IServiceProvider), (PVOID*)&pServiceProvider);"""
CLSID_ImmersiveShell = pywintypes.IID("{C2F03A33-21F5-47FA-B4BB-156362A2F239}")
provider = pythoncom.CoCreateInstance(
CLSID_ImmersiveShell,
None,
pythoncom.CLSCTX_LOCAL_SERVER,
pythoncom.IID_IServiceProvider,
)
print(provider)
"""if (SUCCEEDED(hr))
{
IVirtualDesktopManager *pDesktopManager = NULL;
hr = pServiceProvider->QueryService(__uuidof(IVirtualDesktopManager), &pDesktopManager);
if (SUCCEEDED(hr))
{
BOOL bIsOnCurrentDesktop = FALSE;
hr = pDesktopManager->IsWindowOnCurrentVirtualDesktop(hWnd, &bIsOnCurrentDesktop);
if (SUCCEEDED(hr))
{
// use bIsOnCurrentDesktop as needed...
}
pDesktopManager->Release();
}
pServiceProvider->Release();
}
"""
manager = provider.QueryService(
pywintypes.IID("{a5cd92ff-29be-454c-8d04-d82879fb3f1b}"),
pythoncom.IID_IUnknown,
)
print(manager)
# C:\dev\examples\desktops>python bypythoncom.py
# <PyIServiceProvider at 0x002A7170 with obj at 0x001C256C>
# <PyIUnknown at 0x002A7188 with obj at 0x002AB2F4>
Using comtypes I don't know what to use as interface argument to QueryService:
# bycomtypes.py
import comtypes
import comtypes.client
from comtypes.GUID import GUID
clsid = GUID("{C2F03A33-21F5-47FA-B4BB-156362A2F239}") # CLSID_ImmersiveShell
service_provider = comtypes.client.CreateObject(clsid, interface=comtypes.IServiceProvider)
print(service_provider)
iid = GUID("{A5CD92FF-29BE-454C-8D04-D82879FB3F1B}") # IID_IVirtualDesktopManager
manager = service_provider.QueryService(
iid, interface
)
# C:\dev\examples\desktops>python bycomtypes.py
# <POINTER(IServiceProvider) ptr=0xbd8d04 at 30c8e90>
I'm not really sure what I should do after getting provider, IUnknown has only QueryInterface method exposed, here's another ctypes and comtypes try:
import ctypes
from comtypes import IUnknown, CLSCTX_LOCAL_SERVER
from comtypes.GUID import GUID
ole32 = ctypes.windll.ole32
# ole32.CoInitialize(None)
CLSID_ImmersiveShell = GUID("{C2F03A33-21F5-47FA-B4BB-156362A2F239}")
IID_IServiceProvider = GUID("{6D5140C1-7436-11CE-8034-00AA006009FA}")
provider = ctypes.POINTER(IUnknown)()
ole32.CoCreateInstance(
ctypes.byref(CLSID_ImmersiveShell),
None,
CLSCTX_LOCAL_SERVER,
ctypes.byref(IID_IServiceProvider),
ctypes.byref(provider),
)
print(provider)
IID_IVirtualDesktopManager = GUID("{A5CD92FF-29BE-454C-8D04-D82879FB3F1B}")
instance = provider.QueryInterface(IUnknown, IID_IVirtualDesktopManager)
# C:\dev\examples\desktops>python byctypes.py
# <POINTER(IUnknown) ptr=0x8b294 at 8a26c0>
# Traceback (most recent call last):
# File "another.py", line 22, in <module>
# instance = provider.QueryInterface(IUnknown, IID_IVirtualDesktopManager)
# File "C:\dev\venvs\project\lib\site-packages\comtypes\__init__.py", line 1158, in QueryInterface
# self.__com_QueryInterface(byref(iid), byref(p))
# _ctypes.COMError: (-2147467262, 'No such interface supported', (None, None, None, 0, None))
Edit2: I changed the last example so it reveals what @Baget points at. An excerpt from the actual implementation in Python of comtypes.IUnknown's QueryInterface is:
def QueryInterface(self, interface, iid=None):
"QueryInterface(interface) -> instance"
p = POINTER(interface)()
if iid is None:
iid = interface._iid_
I would be grateful if someone gives a hint on how to do this or links some implementation I may follow to do the job.
You can take inspiration from below code to write your own
All credits to the original author on https://github.com/DanEdens/Virtual_Desktops_Plugin/
# -*- coding: utf-8 -*-
#
# This file is a plugin for EventGhost.
# Copyright © 2005-2019 EventGhost Project <http://www.eventghost.net/>
#
# EventGhost is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 2 of the License, or (at your option)
# any later version.
#
# EventGhost is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along
# with EventGhost. If not, see <http://www.gnu.org/licenses/>.
u"""
Name: VirtualDesktops
Author: Kgschlosser
Version: 0.1
Description: Creates events based on Virtual desktop interactions.
GUID: {5DFFBD61-7582-4D6F-8EA9-9CB36284C9CF}
URL: http://eventghost.net/forum/viewtopic.php?f=10&p=53389#p53389
"""
import eg
eg.RegisterPlugin(
name = "Virtual Desktops",
author = "Kgschlosser",
version = "0.0.004",
guid = "{C2F03A33-21F5-47FA-B4BB-156362A2F239}",
canMultiLoad = False,
url = "http://eventghost.net/forum/viewtopic.php?f=10&p=53389#p53389",
description = "Creates events based on Virtual desktop interactions.",
)
from ctypes.wintypes import HRESULT, HWND, BOOL, POINTER, DWORD, INT, UINT, LPVOID, ULONG
import comtypes
import ctypes
from comtypes import helpstring, COMMETHOD
from comtypes.GUID import GUID
REFGUID = POINTER(GUID)
REFIID = REFGUID
ENUM = INT
IID = GUID
INT32 = ctypes.c_int32
INT64 = ctypes.c_int64
CLSID_ImmersiveShell = GUID(
'{C2F03A33-21F5-47FA-B4BB-156362A2F239}'
)
CLSID_IVirtualNotificationService = GUID(
'{A501FDEC-4A09-464C-AE4E-1B9C21B84918}'
)
class HSTRING__(ctypes.Structure):
_fields_ = [
('unused', INT),
]
HSTRING = POINTER(HSTRING__)
class EventRegistrationToken(ctypes.Structure):
_fields_ = [
('value', INT64)
]
class AdjacentDesktop(ENUM):
LeftDirection = 3
RightDirection = 4
class ApplicationViewOrientation(ENUM):
ApplicationViewOrientation_Landscape = 0
ApplicationViewOrientation_Portrait = 1
class TrustLevel(ENUM):
BaseTrust = 0
PartialTrust = BaseTrust + 1
FullTrust = PartialTrust + 1
IID_IInspectable = GUID(
'{AF86E2E0-B12D-4C6A-9C5A-D7AA65101E90}'
)
class IInspectable(comtypes.IUnknown):
_case_insensitive_ = True
_idlflags_ = []
_iid_ = IID_IInspectable
_methods_ = [
COMMETHOD(
[helpstring('Method GetIids')],
HRESULT,
'GetIids',
(['out'], POINTER(ULONG), 'iidCount'),
(['out'], POINTER(POINTER(IID)), 'iids'),
),
COMMETHOD(
[helpstring('Method GetRuntimeClassName')],
HRESULT,
'GetRuntimeClassName',
(['out'], POINTER(HSTRING), 'className'),
),
COMMETHOD(
[helpstring('Method GetTrustLevel')],
HRESULT,
'GetTrustLevel',
(['out'], POINTER(TrustLevel), 'trustLevel'),
),
]
IID_IApplicationViewConsolidatedEventArgs = GUID(
'{514449EC-7EA2-4DE7-A6A6-7DFBAAEBB6FB}'
)
class IApplicationViewConsolidatedEventArgs(IInspectable):
_case_insensitive_ = True
_iid_ = IID_IApplicationViewConsolidatedEventArgs
_idlflags_ = []
_methods_ = [
COMMETHOD(
[helpstring('Method get_IsUserInitiated')],
HRESULT,
'get_IsUserInitiated',
(['retval', 'out'], POINTER(BOOL), 'value'),
),
]
IID_IApplicationView = GUID(
'{D222D519-4361-451E-96C4-60F4F9742DB0}'
)
class IApplicationView(IInspectable):
_case_insensitive_ = True
_iid_ = IID_IApplicationView
_idlflags_ = []
_methods_ = [
COMMETHOD(
[helpstring('Method get_Orientation')],
HRESULT,
'get_Orientation',
(['retval', 'out'], POINTER(ApplicationViewOrientation), 'value'),
),
COMMETHOD(
[helpstring('Method get_AdjacentToLeftDisplayEdge')],
HRESULT,
'get_AdjacentToLeftDisplayEdge',
(['retval', 'out'], POINTER(BOOL), 'value'),
),
COMMETHOD(
[helpstring('Method get_AdjacentToRightDisplayEdge')],
HRESULT,
'get_AdjacentToRightDisplayEdge',
(['retval', 'out'], POINTER(BOOL), 'value'),
),
COMMETHOD(
[helpstring('Method get_IsFullScreen')],
HRESULT,
'get_IsFullScreen',
(['retval', 'out'], POINTER(BOOL), 'value'),
),
COMMETHOD(
[helpstring('Method get_IsOnLockScreen')],
HRESULT,
'get_IsOnLockScreen',
(['retval', 'out'], POINTER(BOOL), 'value'),
),
COMMETHOD(
[helpstring('Method get_IsScreenCaptureEnabled')],
HRESULT,
'get_IsScreenCaptureEnabled',
(['retval', 'out'], POINTER(BOOL), 'value'),
),
COMMETHOD(
[helpstring('Method put_IsScreenCaptureEnabled')],
HRESULT,
'put_IsScreenCaptureEnabled',
(['in'], BOOL, 'value'),
),
COMMETHOD(
[helpstring('Method put_Title')],
HRESULT,
'put_Title',
(['in'], HSTRING, 'value'),
),
COMMETHOD(
[helpstring('Method get_Title')],
HRESULT,
'get_Title',
(['retval', 'out'], POINTER(HSTRING), 'value'),
),
COMMETHOD(
[helpstring('Method get_Id')],
HRESULT,
'get_Id',
(['retval', 'out'], POINTER(INT32), 'value'),
),
COMMETHOD(
[helpstring('Method add_Consolidated')],
HRESULT,
'add_Consolidated',
(['in'], POINTER(IApplicationViewConsolidatedEventArgs), 'handler'),
(['retval', 'out'], POINTER(EventRegistrationToken), 'token'),
),
COMMETHOD(
[helpstring('Method remove_Consolidated')],
HRESULT,
'remove_Consolidated',
(['in', ], EventRegistrationToken, 'EventRegistrationToken'),
),
]
IID_IServiceProvider = GUID(
'{6D5140C1-7436-11CE-8034-00AA006009FA}'
)
class IServiceProvider(comtypes.IUnknown):
_case_insensitive_ = True
_idlflags_ = []
_iid_ = IID_IServiceProvider
_methods_ = [
COMMETHOD(
[helpstring('Method QueryService'), 'local', 'in'],
HRESULT,
'QueryService',
(['in'], REFGUID, 'guidService'),
(['in'], REFIID, 'riid'),
(['out'], POINTER(LPVOID), 'ppvObject'),
),
]
IID_IObjectArray = GUID(
"{92CA9DCD-5622-4BBA-A805-5E9F541BD8C9}"
)
class IObjectArray(comtypes.IUnknown):
"""
Unknown Object Array
"""
_case_insensitive_ = True
_idlflags_ = []
_iid_ = None
_methods_ = [
COMMETHOD(
[helpstring('Method GetCount')],
HRESULT,
'GetCount',
(['out'], POINTER(UINT), 'pcObjects'),
),
COMMETHOD(
[helpstring('Method GetAt')],
HRESULT,
'GetAt',
(['in'], UINT, 'uiIndex'),
(['in'], REFIID, 'riid'),
(['out', 'iid_is'], POINTER(LPVOID), 'ppv'),
),
]
IID_IVirtualDesktop = GUID(
'{FF72FFDD-BE7E-43FC-9C03-AD81681E88E4}'
)
class IVirtualDesktop(comtypes.IUnknown):
_case_insensitive_ = True
_iid_ = IID_IVirtualDesktop
_idlflags_ = []
_methods_ = [
COMMETHOD(
[helpstring('Method IsViewVisible')],
HRESULT,
'IsViewVisible',
(['out'], POINTER(IApplicationView), 'pView'),
(['out'], POINTER(INT), 'pfVisible'),
),
COMMETHOD(
[helpstring('Method GetID')],
HRESULT,
'GetID',
(['out'], POINTER(GUID), 'pGuid'),
)
]
IID_IVirtualDesktopManager = GUID(
'{A5CD92FF-29BE-454C-8D04-D82879FB3F1B}'
)
class IVirtualDesktopManager(comtypes.IUnknown):
_case_insensitive_ = True
_iid_ = IID_IVirtualDesktopManager
_idlflags_ = []
_methods_ = [
COMMETHOD(
[helpstring('Method IsWindowOnCurrentVirtualDesktop')],
HRESULT,
'IsWindowOnCurrentVirtualDesktop',
(['in'], HWND, 'topLevelWindow'),
(['out'], POINTER(BOOL), 'onCurrentDesktop'),
),
COMMETHOD(
[helpstring('Method GetWindowDesktopId')],
HRESULT,
'GetWindowDesktopId',
(['in'], HWND, 'topLevelWindow'),
(['out'], POINTER(GUID), 'desktopId'),
),
COMMETHOD(
[helpstring('Method MoveWindowToDesktop')],
HRESULT,
'MoveWindowToDesktop',
(['in'], HWND, 'topLevelWindow'),
(['in'], REFGUID, 'desktopId'),
),
]
CLSID_VirtualDesktopManagerInternal = GUID(
'{C5E0CDCA-7B6E-41B2-9FC4-D93975CC467B}'
)
IID_IVirtualDesktopManagerInternal = GUID(
'{F31574D6-B682-4CDC-BD56-1827860ABEC6}'
)
# IID_IVirtualDesktopManagerInternal = GUID(
# '{AF8DA486-95BB-4460-B3B7-6E7A6B2962B5}'
# )
# IID_IVirtualDesktopManagerInternal = GUID(
# '{EF9F1A6C-D3CC-4358-B712-F84B635BEBE7}'
# )
class IVirtualDesktopManagerInternal(comtypes.IUnknown):
_case_insensitive_ = True
_iid_ = IID_IVirtualDesktopManagerInternal
_idlflags_ = []
_methods_ = [
COMMETHOD(
[helpstring('Method GetCount')],
HRESULT,
'GetCount',
(['out'], POINTER(UINT), 'pCount'),
),
COMMETHOD(
[helpstring('Method MoveViewToDesktop')],
HRESULT,
'MoveViewToDesktop',
(['out'], POINTER(IApplicationView), 'pView'),
(['out'], POINTER(IVirtualDesktop), 'pDesktop'),
),
COMMETHOD(
[helpstring('Method CanViewMoveDesktops')],
HRESULT,
'CanViewMoveDesktops',
(['out'], POINTER(IApplicationView), 'pView'),
(['out'], POINTER(INT), 'pfCanViewMoveDesktops'),
),
COMMETHOD(
[helpstring('Method GetCurrentDesktop')],
HRESULT,
'GetCurrentDesktop',
(['out'], POINTER(POINTER(IVirtualDesktop)), 'desktop'),
),
COMMETHOD(
[helpstring('Method GetDesktops')],
HRESULT,
'GetDesktops',
(['out'], POINTER(POINTER(IObjectArray)), 'ppDesktops'),
),
COMMETHOD(
[helpstring('Method GetAdjacentDesktop')],
HRESULT,
'GetAdjacentDesktop',
(['out'], POINTER(IVirtualDesktop), 'pDesktopReference'),
(['in'], AdjacentDesktop, 'uDirection'),
(['out'], POINTER(POINTER(IVirtualDesktop)), 'ppAdjacentDesktop'),
),
COMMETHOD(
[helpstring('Method SwitchDesktop')],
HRESULT,
'SwitchDesktop',
(['in'], POINTER(IVirtualDesktop), 'pDesktop'),
),
COMMETHOD(
[helpstring('Method CreateDesktopW')],
HRESULT,
'CreateDesktopW',
(['out'], POINTER(POINTER(IVirtualDesktop)), 'ppNewDesktop'),
),
COMMETHOD(
[helpstring('Method RemoveDesktop')],
HRESULT,
'RemoveDesktop',
(['in'], POINTER(IVirtualDesktop), 'pRemove'),
(['in'], POINTER(IVirtualDesktop), 'pFallbackDesktop'),
),
COMMETHOD(
[helpstring('Method FindDesktop')],
HRESULT,
'FindDesktop',
(['in'], POINTER(GUID), 'desktopId'),
(['out'], POINTER(POINTER(IVirtualDesktop)), 'ppDesktop'),
),
]
IID_IVirtualDesktopNotification = GUID(
'{C179334C-4295-40D3-BEA1-C654D965605A}'
)
class IVirtualDesktopNotification(comtypes.IUnknown):
_case_insensitive_ = True
_iid_ = IID_IVirtualDesktopNotification
_idlflags_ = []
_methods_ = [
COMMETHOD(
[helpstring('Method VirtualDesktopCreated')],
HRESULT,
'VirtualDesktopCreated',
(['in'], POINTER(IVirtualDesktop), 'pDesktop'),
),
COMMETHOD(
[helpstring('Method VirtualDesktopDestroyBegin')],
HRESULT,
'VirtualDesktopDestroyBegin',
(['in'], POINTER(IVirtualDesktop), 'pDesktopDestroyed'),
(['in'], POINTER(IVirtualDesktop), 'pDesktopFallback'),
),
COMMETHOD(
[helpstring('Method VirtualDesktopDestroyFailed')],
HRESULT,
'VirtualDesktopDestroyFailed',
(['in'], POINTER(IVirtualDesktop), 'pDesktopDestroyed'),
(['in'], POINTER(IVirtualDesktop), 'pDesktopFallback'),
),
COMMETHOD(
[helpstring('Method VirtualDesktopDestroyed')],
HRESULT,
'VirtualDesktopDestroyed',
(['in'], POINTER(IVirtualDesktop), 'pDesktopDestroyed'),
(['in'], POINTER(IVirtualDesktop), 'pDesktopFallback'),
),
COMMETHOD(
[helpstring('Method ViewVirtualDesktopChanged')],
HRESULT,
'ViewVirtualDesktopChanged',
(['in'], POINTER(IApplicationView), 'pView'),
),
COMMETHOD(
[helpstring('Method CurrentVirtualDesktopChanged')],
HRESULT,
'CurrentVirtualDesktopChanged',
(['in'], POINTER(IVirtualDesktop), 'pDesktopOld'),
(['in'], POINTER(IVirtualDesktop), 'pDesktopNew'),
),
]
IID_IVirtualDesktopNotificationService = GUID('{0CD45E71-D927-4F15-8B0A-8FEF525337BF}')
class IVirtualDesktopNotificationService(comtypes.IUnknown):
_case_insensitive_ = True
_iid_ = IID_IVirtualDesktopNotificationService
_idlflags_ = []
_methods_ = [
COMMETHOD(
[helpstring('Method Register')],
HRESULT,
'Register',
(['in'], POINTER(IVirtualDesktopNotification), 'pNotification'),
(['out'], POINTER(DWORD), 'pdwCookie'),
),
COMMETHOD(
[helpstring('Method Unregister')],
HRESULT,
'Unregister',
(['in'], DWORD, 'dwCookie'),
),
]
comtypes.CoInitialize()
pServiceProvider = comtypes.CoCreateInstance(
CLSID_ImmersiveShell,
IServiceProvider,
comtypes.CLSCTX_LOCAL_SERVER,
)
pDesktopManagerInternal = comtypes.cast(
pServiceProvider.QueryService(
CLSID_VirtualDesktopManagerInternal,
IID_IVirtualDesktopManagerInternal
),
ctypes.POINTER(IVirtualDesktopManagerInternal)
)
pObjectArray = POINTER(IObjectArray)()
pDesktopManagerInternal.GetDesktops(ctypes.byref(pObjectArray))
count = UINT()
pObjectArray.GetCount(ctypes.byref(count))
for i in range(count):
pDesktop = POINTER(IVirtualDesktop)()
pObjectArray.GetAt(i, IID_IVirtualDesktop, ctypes.byref(pDesktop))
id = GUID()
pDesktop.GetID(ctypes.byref(id))
print(id)