Re: [Pyobjc-dev] More wiimote wrapping fun!

[Ronald O. <ron...@ma...>]

On 21 Feb, 2008, at 18:57, John Harrison wrote:

> I can't get a signature.  Attempting to do so I get:
> AttributeError: 'function' object has no attribute 'signature'
>
>
> calling dir(rawIRData_) gives:
> ['__call__', '__class__', '__delattr__', '__dict__', '__doc__',  
> '__get__', '__getattribute__', '__hash__', '__init__', '__module__',  
> '__name__', '__new__', '__reduce__', '__reduce_ex__', '__repr__',  
> '__setattr__', '__str__', 'func_closure', 'func_code',  
> 'func_defaults', 'func_dict', 'func_doc', 'func_globals', 'func_name']
>
> What connects the objc.informal_protocol definition with the class  
> wii_remote_delegate?  I can't see anything that seems to use the  
> same name for the thing in two places.  Is that where the problem is?

Is the delegate a subclass of NSObject (either directly or indirectly)?

Ronald

>
>
> thanks,
> John
>
> On Feb 21, 2008, at 3:20 AM, Ronald Oussoren wrote:
>
>>
>> On 20 Feb, 2008, at 1:02, John Harrison wrote:
>>
>>> I've been following the discussions concerning the wiimote wrapper
>>> with interest as I have this insane dream of integrating head
>>> tracking into my laser/pySight controlled video game in order to  
>>> make
>>> it even sillier than it currently is.  Alas, I have encountered
>>> problems along the way.
>>>
>>> Working with some people that I've found on this list and the
>>> darwiinremote project I've got something that works somewhat for
>>> button presses and the irPointMovedX_Y_ method.  My problem is  
>>> that I
>>> want to capture the raw IR data, and this portion of the code seem  
>>> to
>>> not work.
>>>
>>> Here is the relevant information from the most recent WiiRemote.h  
>>> file:
>>>
>>>
>>> typedef struct {
>>> 	int x, y, s;
>>> } IRData;
>>>
>>> @interface NSObject (WiiRemoteDelegate)
>>> - (void) rawIRData: (IRData[4]) irData;
>>>
>>>
>>>
>>>
>>> in python I have the following:
>>>
>>> WiiRemoteDelegate = objc.informal_protocol(
>>>    "WiiRemoteDelegate",
>>>    [
>>>        objc.selector(None,
>>>            selector="irPointMovedX:Y:",
>>>            signature="v@:ff", isRequired=False),
>>>        objc.selector(None,
>>>            selector="rawIRData:",
>>>            signature="v@:[4{IRData=iii}]", isRequired=False)
>>> ...
>>>
>>>    def rawIRData_(self, *posargs, **kwdargs):
>>>    #def rawIRData_(self, irData):
>>>        #print 'rawIRData: %s' % (irData,)
>>>        for x in posargs:
>>>            print '%x' % (x)
>>>
>>>
>>> No matter what I do I get the same data in my delegate, formatted as
>>> hex here:
>>> 1322f2c
>>>      13
>>> bfffe350
>>> 1313b20
>>> 1313b00
>>> bfffe3a0
>>>       0
>>> 154c396
>>> 94aa0ca4
>>> 142b9c8
>>> 1322ed0
>>>      13
>>>
>>> This looks to me like I'm not getting the ints that I would expect
>>> but that I'm getting references to the IRData struct or something.
>>
>> That's odd, it looks like the informal protocol isn't actually  
>> used. What's the value of rawIRData_.signature? This should be v@: 
>> [4{IRData=iii}]. Please use the commented-out version of the method  
>> prototype for this, not the one with '*posargs'.
>>
>> BTW. I've downloaded the WiiRemote framework a while back and my  
>> parsing script cannot deal with some features in the header files  
>> (I haven't even tried fixing that yet). Furthermore, you won't be  
>> able to use the Mii structure from python because that contains  
>> bitfields and those aren't supported yet.
>>
>> Ronald
>>>
>>>
>>> Is there something wrong with selector and/or signature?  Do I need
>>> to add method encodings to the signature?  What would a properly
>>> encoded signature look like?  If these are pointers is there a way  
>>> to
>>> dereference them in python?
>>>
>>> I've been banging my head against this for more time than I'd like  
>>> to
>>> admit and keep getting either bus errors or junk data.
>>>
>>> Thanks!
>>> John
>>>
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>>
>