From: Adam Gardner <adam.oddfellow@...>
Date: 2009-02-21T08:06:07+09:00
Subject: Re: RubyCocoa and Mac System Icons

Tom Medhurst wrote:
> Hi There,
> 
> I am trying to create an NSImage which contains the system kComputer
> icon. Unfortunately RubyCocoa can't resolve kComputer or
> use :kComputer or it's header value 'root'.. I have tried the
> following:
> 
> 1. NSWorkspace.sharedWorkspace.iconForFileType(NSFileTypeForHFSTypeCode
> (:root))
> 2. NSWorkspace.sharedWorkspace.iconForFileType(NSFileTypeForHFSTypeCode
> (:kComputer))
> 3. NSWorkspace.sharedWorkspace.iconForFileType(NSFileTypeForHFSTypeCode
> (kComputer))
> 4. NSWorkspace.sharedWorkspace.iconForFileType(NSFileTypeForHFSTypeCode
> (NSNumber.numberWithUnsignedLong('root')))
> 
> 5. NSWorkspace.sharedWorkspace.iconForFileType(:root)
> 6. NSWorkspace.sharedWorkspace.iconForFileType(:kComputer)
> 7. NSWorkspace.sharedWorkspace.iconForFileType(kComputer)
> etc...
> 
> Has anybody got this to work in RubyCocoa?
> Many Thanks
> *Tom Medhurst*

First off, since in Ruby all constants begin with a capital letter, all 
the constants like kSuchAndSuch morph into OSX::KSuchAndSuch.

Second of all, where on earth is kComputer defined? I can't find it 
documented *anywhere*; in particular, it's not in this list: 
http://developer.apple.com/documentation/Carbon/Reference/IconServices/Reference/reference.html#//apple_ref/doc/uid/TP30000239-CH4g-TPXREF130

Third, it seems to me that the iconForFileType method of NSWorkspace 
takes a string representing either a filename extension or a HFS file 
type. So if anything of these is going to work, it'd be:

OSX::NSWorkspace.sharedWorkspace.iconForFileType('root')

which does, in fact, return an NSImage instance for me. Of course, I get 
an NSImage with every string I've tried, including the empty string - I 
haven't tried drawing it on screen to see if it's the one you want, 
since I don't have anywhere to draw it to, as it were. But it should be 
a good place for you to start.
-- 
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