[C++-sig] Wrapping and Passing HWND with Boost.Python

[Ehsan Pi]

Thanks Roman for your quick reply,

That's what confuses me. HWND is essentially a pointer to an int to hold
the window handle. How can to convert them to each other?

Ehsan

On Mon, Apr 30, 2012 at 2:46 PM, Roman Yakovenko
<roman.yakovenko at gmail.com>wrote:

> On Mon, Apr 30, 2012 at 9:11 PM, Ehsan Pi <ehsanpii at gmail.com> wrote:
> > In python I get the not-match error:
> >
> >     >>> import MyWrapper
> >     >>> import win32gui
> >     >>> hwnd = win32gui.GetDesktopWindow()
> >     >>> foo = MyWrapper.Foo(hwnd)
> >     Traceback (most recent call last):
> >       File "<stdin>", line 1, in <module>
> >     Boost.Python.ArgumentError: Python argument types in
> >         Foo.__init__(Foo, int)
> >     did not match C++ signature:
> >         __init__(struct _object *, struct HWND__ * window)
> >     >>>
> >
> > How can I correct this problem to be able to pass a window's handle (from
> > win32gui) in Python to C++ class, and interact with it?
>
> I think the error is pretty clear: the exported constructor expects a
> pointer to some struct(?) HWND__, while, win32gui returns the handle
> as integer. You will have to find some way to associate handle as
> integer with handle as HWND__.  Once you find it, you can use
> "make_constructor" functionality, which is also supported by py++.
>
> HTH.
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