I'm trying to get the 3D Space Navigator (http://www.3dconnexion.com/) to work
in Python. I quickly found a solution using comtypes on the 3DConnexion
developer forum:
http://www.3dconnexion.com/forum/viewtopic.php?t=984&start=30
However that solution only works with comtypes version 0.2.1. Any newer version
will result in the events not registering.
This is the output I get from the GetEvents() function when using version 0.2.1:
Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import logging
>>> logging.basicConfig(level=logging.DEBUG)
>>> class EventHandler:
... def __getattr__(self, name):
... print name
...
>>> from comtypes.client import *
DEBUG:comtypes:CoInitializeEx(None, 2)
>>> x = CreateObject("TDxInput.Device")
DEBUG:comtypes.client:TDxInput.Device ->
{82C5AB54-C92C-4D52-AAC5-27E25E22604C}
DEBUG:comtypes.client:CoCreateInstance({82C5AB54-C92C-4D52-AAC5-27E25E22604C},
clsctx=None, interface=None)
INFO:comtypes.client:wrap(<POINTER(IUnknown) object c108a0>)
INFO:comtypes.client:Does implement IProvideClassInfo
INFO:comtypes.client:Implements default interface from typeinfo <class
'comtypes.gen._7858B9E0_5793_4BE4_9B53_661D922790D2_0_1_0.ISimpleDevice'>
INFO:comtypes.client:Final result is <POINTER(ISimpleDevice) object
c2c080>
>>> x.Connect()
0
>>> test = GetEvents(x.sensor, EventHandler)
INFO:comtypes.client:wrap_outparam(<POINTER(ISensor) object c108a0>)
DEBUG:comtypes.client:<POINTER(ISensor) object c108a0> using
sinkinterface <class
'comtypes.gen._7858B9E0_5793_4BE4_9B53_661D922790D2_0_1_0._ISensorEvents'>
DEBUG:comtypes.client:Start advise <class
'comtypes.gen._7858B9E0_5793_4BE4_9B53_661D922790D2_0_1_0._ISensorEvents'>
DEBUG:comtypes._comobject:<comtypes.client.DispEventReceiver object at
0x00C12590>.QueryInterface({E6929A4A-6F41-46C6-9252-A8CC53472CB1}) -> S_OK
DEBUG:comtypes._comobject:1 active COM objects: Added
<comtypes.client.DispEventReceiver object at 0x00C12590>
DEBUG:comtypes._comobject:<comtypes.client.DispEventReceiver object at
0x00C12590>.AddRef() -> 1
DEBUG:comtypes.client:End advise <class
'comtypes.gen._7858B9E0_5793_4BE4_9B53_661D922790D2_0_1_0._ISensorEvents'>
DEBUG:comtypes._comobject:<comtypes.client.DispEventReceiver object at
0x00C12590>.Release() -> 0
DEBUG:comtypes._comobject:0 active COM objects: Removed
<comtypes.client.DispEventReceiver object at 0x00C12590>
>>>
And this is the output I get when I use version 0.5.1:
Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import logging
>>> logging.basicConfig(level=logging.DEBUG)
>>> from comtypes.client import *
DEBUG:comtypes:CoInitializeEx(None, 2)
>>> x = CreateObject("TDxInput.Device")
DEBUG:comtypes.client:TDxInput.Device ->
{82C5AB54-C92C-4D52-AAC5-27E25E22604C}
DEBUG:comtypes.client:CoCreateInstance({82C5AB54-C92C-4D52-AAC5-27E25E22604C},
clsctx=None, interface=None)
DEBUG:comtypes.client:GetBestInterface(<POINTER(IUnknown) ptr=0x9f3fc0
at c0e3f0>)
DEBUG:comtypes.client:Does implement IProvideClassInfo
DEBUG:comtypes.client:Default interface is
{CB3BF65E-0816-482A-BB11-64AF1E837812}
DEBUG:comtypes:Release <POINTER(IUnknown) ptr=0x9f3fc0 at c14080>
DEBUG:comtypes.client._generate:GetModule(TLIBATTR(GUID={7858B9E0-5793-4BE4-9B53-661D922790D2},
Version=1.0, LCID=0, FLags=0x8))
DEBUG:comtypes.client:Implements default interface from typeinfo <class
'comtypes.gen._7858B9E0_5793_4BE4_9B53_661D922790D2_0_1_0.ISimpleDevice'>
DEBUG:comtypes.client:Final result is <POINTER(ISimpleDevice)
ptr=0x9f3fc0 at c14d00>
DEBUG:comtypes:Release <POINTER(IProvideClassInfo) ptr=0x9f68a8 at
c0ed00>
DEBUG:comtypes:Release <POINTER(ITypeInfo) ptr=0x24c5f4 at c0eda0>
DEBUG:comtypes:Release <POINTER(ITypeInfo) ptr=0x24c620 at c0ee90>
DEBUG:comtypes:Release <POINTER(ITypeLib) ptr=0x24bd88 at c0ef80>
DEBUG:comtypes:Release <POINTER(IUnknown) ptr=0x9f3fc0 at c0e3f0>
>>> x.Connect()
0
>>> test = ShowEvents(x.sensor)
DEBUG:comtypes.client:wrap_outparam(<POINTER(ISensor) ptr=0x9f2170 at
c14d50>)
DEBUG:comtypes.client._events:<POINTER(ISensor) ptr=0x9f2170 at c14d50>
using sinkinterface <class
'comtypes.gen._7858B9E0_5793_4BE4_9B53_661D922790D2_0_1_0._ISensorEvents'>
DEBUG:comtypes:Release <POINTER(IProvideClassInfo2) ptr=0x9f2194 at
a91530>
# event found: _ISensorEvents_SensorInput
DEBUG:comtypes.client._events:Start advise <class
'comtypes.gen._7858B9E0_5793_4BE4_9B53_661D922790D2_0_1_0._ISensorEvents'>
DEBUG:comtypes._comobject:<comtypes.client._events.Sink object at
0x00C52990>.QueryInterface({E6929A4A-6F41-46C6-9252-A8CC53472CB1}) -> S_OK
DEBUG:comtypes._comobject:1 active COM objects: Added
<comtypes.client._events.Sink object at 0x00C52990>
DEBUG:comtypes._comobject:<comtypes.client._events.Sink object at
0x00C52990>.AddRef() -> 1
DEBUG:comtypes:Release <POINTER(IConnectionPointContainer) ptr=0x9f2174
at c843a0>
DEBUG:comtypes:Release <POINTER(ISensor) ptr=0x9f2170 at c14d50>
>>>
I believe, that this is enough output, because I believe the line
"DEBUG:comtypes:Release <POINTER(ISensor) ptr=0x9f2170 at c14d50>" shows, where
the bug originates. If you need any further testing, I would be glad to help.
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