From: Holden Glova <dsafari@...>
Date: 2001-01-09T16:21:53+09:00
Subject: [ruby-talk:8899] Re: Modules and mixins

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On Mon, 08 Jan 2001 15:53, I think Kevin Smith wrote:
> Personally, I don't go looking for a reason to
> use modules. If/when I find something I want to
> do that is difficult, I try to find language
> support for making it easier. That's when I would
> turn to a module.

Just to clarify, I wasn't looking for a reason to use them, merely for a way 
to recognize when I might want to use them.

.... snipped some good points of clarity ...

> Let's say you wanted to add a debug logging
> method to several unrelated classes. The method
> is called log, and it figures out once where to
> send the log data, and after that it just sends
> it. Rather than inserting the same "def log..."
> code into each class, you can mix it in by
> creating a module that has the log method
> defined, and just including it into each class
> that you want to be able to log.

Ok, this is an example where I would probably start out with aggregation. 
Perhaps a pattern to look for would be when many classes are aggregating a 
common class(s) to provide a(several) common elements of functionality - 
would you/others agree with this? The light my have just clicked on within my 
sometimes dark tunnel of vision *wink*

> >P.S. Anyone give me a hint on what I should be looking for in order to
> > create and use the underscore in a Menu with GTK?
>
> The full GTK+ seems to have a "factory" that
> allows you specify an underscore. It does not
> appear that Ruby/GTK wraps that.
>
> If you can query a menu item to get its
> underlying label object, you can set up an
> underline mask for that label, according to the
> online GTK reference I use. I haven't tried it
> myself, yet, and I haven't checked to see if
> Ruby/GTK supports that.

Thanks for your input there Kevin, I thougth I was just missing how to do it 
and the answer was sitting right in front of my nose :-)

> Kevin

- -- 
Signed,
Holden Glova
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