[rdnzl-devel] .NET Picture Viewer in RDNZL

[Ron Parker]

I've posted a RDNZL port of the .NET Picture Viewer tutorial on
github, https://github.com/rdparker/cl-picture-viewer. This was mostly
a learning experience for me but I thought it might come in handy for
others. It's neither great Lisp nor highly informed .NET code, but it
is a complete application.

Basically I worked through the C# demo, then peered into the code and
hand translated it to what is in the repo. But now I have an idea of
how to approach creating a .NET interface for  a personal research
project.

In the course of writing this a couple questions arose.

1. Is there anyway to call BeginInit on a PictureBox without resorting to C++?

Attempting [BeginInit (cast picture-box "ISupportInitialize")] results
in a cast error similar to the IConvertible message referred to in
http://lists.common-lisp.net/pipermail/rdnzl-devel/2007-April/000390.html.

2. Is it possible to override random method in .NET object via RDNZL?

As an example in the C# code there is an implementation of Dispose,
which I was uncertain if I needed to or how to duplicate it:

protected override void Dispose(bool disposing)
{
  if (disposing && (components != null))
    {
      components.Dispose();
    }
  base.Dispose(disposing);
}

Edi thank you for writing RDNZL. It has already saved me a lot of
time. I'd looked into the managed-unmanaged C++ interop bits of .NET
and was not looking forward to writing it all myself.

Thanks,

Ron Parker