Re: [Swig-user] Third party wrapping tool

[William S F. <ws...@fu...>]

Mathieu Malaterre wrote:
> On Fri, Mar 20, 2009 at 8:13 AM, William S Fulton
> <ws...@fu...> wrote:
>> Mathieu Malaterre wrote:
>>> Hi there,
>>>
>>>  I am trying to access c++ object from a C# layer that was wrapped by
>>> a 3rd party tool (not swig AFAIK). Looking at the hierarchy of class I
>>> could find the top level object to be (C# layer):
>>>
>>> public class WrappedObject : IDisposable
>>> {
>>> ...
>>>    public HandleRef GetCppThis();
>>>    protected void SetCppThis(IntPtr rawCppThis, bool
>>> callDisposalMethod, bool strong);
>>> }
>>>
>>>
>>>  My understanding is that the C++ pointer (just a guess) is just a
>>> call away: GetCppThis().
>>>
>>>  So what I would like to do with swig is be able to wrap a function
>>> that takes as input a 'HandleRef'. Then in the body of my c++ function
>>> I should be able to manipulate the C++ object directly.
>>>
>>> My first attempt was this:
>>>
>>>
>>> http://gdcm.svn.sourceforge.net/viewvc/gdcm/Sandbox/KitwareMummy/swig_kitwaremummy.i?view=markup
>>>
>>> but I do not understand how I can use the generated
>>> swig_kitwaremummyPINVOKE class:
>>>
>>>
>>> http://gdcm.svn.sourceforge.net/viewvc/gdcm/Sandbox/KitwareMummy/runme.cs?view=markup&sortby=date
>>>
>>>  It keeps on telling me that this class does not have the proper
>>> access level (translated from french error message).
>>>
>>> What am i missing to be able to call this 'func' function
>> The PINVOKE class is an internal workings class and you should be calling
>> swig_kitwaremummy.func( img.GetCppThis() ) instead. I see you have commented
>> that out,
> 
> I could not figure out how to make the SWIGTYPE_p_void (my void* ptr)
> be a HandleRef... so the simpliest work around I found is to use
> directly the PINVOKE class directly :)
> 

%typemap(cstype) void * "HandleRef"

Should be enough to fix this.

William