RE: [Cxxgui-devel] RE: C++ GUI library

[Daniel J. <dan...@em...>]

On Wed, 2004-03-10 at 05:33, David Turner wrote:

> Great.  I've added you to the developer's list on the project, so you
> should be able to commit your changes.

Ok, it's checked in. They still need quite a bit of work. There's stuff
in the Jamfile for test which should be defined in the library jamfile.
But it does work for GTK.

> Hmm.  It would be nice to have it working... unfortunately I don't have
> VC6 anymore.  If you could send me an error output, maybe I can fix it.
> I suspect that the problem will be the factory.  It should be quite easy
> to write it in a compatible manner.
> 
> I'll test with cygwin and mingw this end.

I've been trying it with cygwin as well. Anyway, here's a list of
problems. Most of them I can fix, but I just want to check what the
right way is.

Cygwin Problems:

- The windows code uses _alloca, but cygwin doesn't have this, it has
alloca instead. I guess that the best thing to do is a define a macro
which calls the right one, say CXXGUI_ALLOCA or something similar. I
think this could be defined in win32.hpp, because that's included by all
the windows implementation files, or would you prefer a separate header?
Alternatively we could use boost::scoped_array.

- main.cpp calls _beginthreadex(), which isn't on cygwin. I have no idea
what the cygwin equivalent of that is.

Visual C++ 6 problems:

- SetWindowLongPtr, GetWindowLongPtr and LONG_PTR aren't available, you
need to use SetWindowLong, GetWindowLong and LONG. I guess that we
should either define the missing functions for Visual C++ 6, or provide a
wrapper function which call the appropriate version. I realise that we
want to use the newer functions when they're available.

There are some other problems, but I think I can fix them quite easily,
I'll have a go when I get the chance and post patches to the list, so
that you can say if they're okay. I also checked in a quick change to
util.hpp, so that is uses BOOST_DEDUCED_TYPENAME. It seemed trivial
enough that I didn't need to check first.

Even if all these problems are fixed, the build system still won't work
on windows, because it doesn't create the dll properly. I think that may
take me a little while to get working. I managed to successfully build
the cygwin version, by making it single threaded, but it crashed when I
clicked on the button to open the new window. I think it died at the
message loop.

I'm also not sure how to link the application so that it calls 'main'
instead of 'winmain' but still acts like a GUI app.

Daniel