Bryan Cole a écrit :
> Hi,
>
Hi Bryan,
> I'm in the process of writing a simple OCAF document browser. I can
> browse the TDF_Label tree OK, but accessing the attributes is proving
> tricky. Mostly, the problem is getting data out of OCC types back to
> python.
>
> Can anyone suggest how to get the content out of a
> TCollection.TCollection_ExtendedString ?
>
> Also, converting Standard_GUID to a python value is difficult. I'd like
> to access the GUID as a string. To use the Standard_GUID::ToCString()
> method, I need to pre-create a C-string (full of zeros), and pass it in
> by reference (as a Standard_PCharacter). Phew, C++ make things so
> hard... Does SWIG give us any tools to construct types manually (from
> ctypes objects perhaps)?
>
I suggest the following 'manual tweak' to the file Standard.i: just add
these lines after the definition of the class Standard_GUID:
%extend Standard_GUID {
Standard_PCharacter ToString() {
Standard_PCharacter tmpstr=NULL;
tmpstr = new char[strlen("00000000-0000-0000-0000-000000000000")+1];
strcpy(tmpstr,"00000000-0000-0000-0000-000000000000");
$self->ToCString(tmpstr);
return tmpstr;
}
};
After the compilation is done, this is an example of how to use:
>> import uuid
>> u = uuid.uuid1()
>> u
UUID('652936b0-2ebd-11de-9469-001422f3600c')
>> from OCC.Standard import *
>> s = Standard_GUID('%s'%u)
>> s.ToString()
'652936b0-2ebd-11de-9469-001422f3600c'
Cheers,
Thomas
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