Ironruby core - May 2011 - Trying to call interface method for a C# class

I am attempting to call an interface method for a .net class and am
having difficulty. I''m using IronRuby v1.1.2 and working with
ScintillaNet, a .net wrapper for the Scintilla control.

A portion of the ScintillaNet::Scintilla class is below:

  namespace ScintillaNet
  {
    ...
    public partial class Scintilla : Control, INativeScintilla,
ISupportInitialize
    {
      ...
    }
  }

And a portion of the ScintillaNet::INativeScintilla interface is below:

  namespace ScintillaNet
  {
    public interface INativeScintilla
    {
      ...
      void BackTab();
      ...
    }
  }

I came across another forum discussion
http://rubyforge.org/pipermail/ironruby-core/2009-January/003520.html,
which seems to fall along the lines of what I''m trying to do, but
I''m
not sure the features discussed there are implemented yet.

I''ve reduced the troublesome code to a relatively short length to play
with alternative approaches:

  require "bin/ScintillaNet"
  class ScintillaNet::Scintilla
    include ScintillaNet::INativeScintilla

    def self.ztest2()
      z = ScintillaNet::Scintilla.new()
      puts "z[#{z}]"
      #; z.BackTab() # undefined method `BackTab'' for
ScintillaNet.Scintilla:ScintillaNet::Scintilla (NoMethodError)
      #; ScintillaNet::INativeScintilla(z).BackTab() # undefined method
`INativeScintilla'' for ScintillaNet:Module (NoMethodError)
      #; ScintillaNet::INativeScintilla.BackTab() # undefined method
`BackTab'' for ScintillaNet::INativeScintilla:Module (NoMethodError)
      puts "fence"
    end
  end

  ScintillaNet::Scintilla.ztest2()
  puts "done"

The three approaches above yield the errors to the right of each line.

Thanks in advance for any assistance you might be able to provide.
--John

-- 
Posted via http://www.ruby-forum.com/.

On Fri, May 20, 2011 at 10:30 PM, John Cawley III <lists at
ruby-forum.com> wrote:
> I am attempting to call an interface method for a .net class and am
> having difficulty. I''m using IronRuby v1.1.2 and working with
> ScintillaNet, a .net wrapper for the Scintilla control.
John, I''m a little unclear about the problem you''re trying to
solve
... I''ve got some questions inline:
> A portion of the ScintillaNet::Scintilla class is below:
>
> ?namespace ScintillaNet
> ?{
> ? ?...
> ? ?public partial class Scintilla : Control, INativeScintilla,
> ISupportInitialize
> ? ?{
> ? ? ?...
Is BackTab implemented in any other partial C# class of Scintilla? If
not, than you should be getting a compiler error ...
> ? ?}
> ?}
>
> And a portion of the ScintillaNet::INativeScintilla interface is below:
>
> ?namespace ScintillaNet
> ?{
> ? ?public interface INativeScintilla
> ? ?{
> ? ? ?...
> ? ? ?void BackTab();
> ? ? ?...
> ? ?}
> ?}
>
> I came across another forum discussion
> http://rubyforge.org/pipermail/ironruby-core/2009-January/003520.html,
> which seems to fall along the lines of what I''m trying to do, but
I''m
> not sure the features discussed there are implemented yet.
That thread is about calling *explicit* interface methods, which we do
now support, though the API needs some work:
http://ironruby.codeplex.com/workitem/1594.
> I''ve reduced the troublesome code to a relatively short length to
play
> with alternative approaches:
>
> ?require "bin/ScintillaNet"
> ?class ScintillaNet::Scintilla
> ? ?include ScintillaNet::INativeScintilla
How come your including this interface here? In C# this class already
implements INativeScintilla ...
> ? ?def self.ztest2()
> ? ? ?z = ScintillaNet::Scintilla.new()
> ? ? ?puts "z[#{z}]"
> ? ? ?#; z.BackTab() # undefined method `BackTab'' for
> ScintillaNet.Scintilla:ScintillaNet::Scintilla (NoMethodError)
This works if I implement BackTab in this class, but again not sure if
that''s what you''re trying to do...
> ? ? ?#; ScintillaNet::INativeScintilla(z).BackTab() # undefined method
> `INativeScintilla'' for ScintillaNet:Module (NoMethodError)
This is invalid IronRuby; .NET interfaces are exposed to IronRuby as
ruby modules, and here you''re using a module as a method.
> ? ? ?#; ScintillaNet::INativeScintilla.BackTab() # undefined method
> `BackTab'' for ScintillaNet::INativeScintilla:Module
(NoMethodError)
Also invalid as INativeScintilla is basically a module without any
actual methods implemented on it, as a .NET interface doesn''t have
method implementations.
> ? ? ?puts "fence"
> ? ?end
> ?end
>
> ?ScintillaNet::Scintilla.ztest2()
> ?puts "done"
>
> The three approaches above yield the errors to the right of each line.
>
> Thanks in advance for any assistance you might be able to provide.
> --John
Let me know if you can clear those things up ...

~Jimmy

And that does it! Thank you, Jimmy!

Summarizing: I was trying to use the ScintillaNet control from IronRuby.
The main class in the ScintillaNet DLL is ScintillaNet::Scintilla, and
I''d been able to invoke its methods and work with its properties from
IronRuby just fine. That class also implements the INativeScintilla
interface, but I was having difficulty working with the methods and
properties of that interface from IronRuby. Accessing those was the
goal.
>From .net, you should be able to access those with code like this:
  ((INativeScintilla)scintilla).BackTab()

The equivelent in IronRuby (thanks to your reference to Work Item 1594,
http://ironruby.codeplex.com/workitem/1594) is:

  scintilla.clr_member( ScintillaNet::INativeScintilla, :BackTab ).call

That was the mechanism I was reaching around for.

Thanks again,
--John

-- 
Posted via http://www.ruby-forum.com/.

I''m hoping to do some work to fix some of the bugs in
IronRuby''s visual
studio integration, but I''m having a few issues getting a dev
environment
up and running.

- I can build IronStudio.sln from the Solutions folder, and my modified 
version of the IronRuby tools loads in the visual studio experimental 
instance and is fine.
- I can build the full IronRuby installer, and when I install it, my 
modified version of IronRuby tools loads in the normal visual studio 
instance.

But, I can''t figure out how I can build a modified version of IronRuby 
tools and run it in a normal instance without doing the full MSI release 
build.
Simply building the tools and then launching a normal visual studio 
instance produces this error message when I open any solution:

---------------------------
Microsoft Visual Studio
---------------------------
The ''Microsoft.IronRubyTools.IronRubyToolsPackage, IronRubyTools, 
Version=1.0.0.0, Culture=neutral, PublicKeyToken=7f709c5b713576e1''
package
did not load correctly.



The problem may have been caused by a configuration change or by the 
installation of another extension. You can get more information by running 
the application together with the /log parameter on the command line, and 
then examining the file 
''C:\Users\orione\AppData\Roaming\Microsoft\VisualStudio\10.0\ActivityLog.xml''.



Continue to show this error message?
---------------------------
Yes   No 
---------------------------

If I click Yes, then the projects load, but this dialog reappears whenever 
I launch VS or load any solutions. If I click no, VS disables the IronRuby 
addin, and I have to run devenv /ResetSkipPkgs to put it back (and then 
the error messages come back). The only way to "fix" the issue is to 
uninstall/reinstall the IronRuby tools MSI itself.

Is there a way to get the non-experimental instance of visual studio to 
load IronRuby tools without having to do a full build if the MSI in 
release mode?

Thanks, Orion

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