FYI, the alloc.init pattern is correct in MacRuby too.
As in pure Objective-C, calling +new in MacRuby is a shortcut for
+alloc and -init. Doing +new then -initWithContentsOfFile will result
in initializing the object twice, probably not what you want.
Laurent
On Jan 5, 2010, at 1:52 AM, Michael Johnston wrote:
Note that I'm aware {{{ image = NSImage.alloc.initWithContentsOfFile
("stretch.tiff") }}} should be {{{ image =
NSImage.new.initWithContentsOfFile("stretch.tiff") }}}, I just
forgot to change back one of my experiments. It doesn't affect
anything in this example though.
Cheerio,
Michael Johnston
lastobe...@mac.com
On 5-Jan-10, at 1:30 AM, Michael Johnston wrote:
I just purchased the book Programming Cocoa with Ruby, and am
working through the examples using Macruby.
This tiny app works fine in rubycocoa, but in macruby the created
statusbar item immediately disappears.
{{{
#!/usr/bin/env macruby
framework 'cocoa'
class App
def applicationDidFinishLaunching(aNotification)
statusbar = NSStatusBar.systemStatusBar
status_item = statusbar.statusItemWithLength
(NSVariableStatusItemLength)
image = NSImage.alloc.initWithContentsOfFile("stretch.tiff")
raise "Icon file 'stretch.tiff' is missing." unless image
status_item.setImage(image)
end
end
NSApplication.sharedApplication
NSApp.delegate = App.new
NSApp.run
}}}
I assumed this had to do with garbage collection because in obj C
status_item would have to be retained, and so I changed
"status_item" to "@status_item" and then it works fine.
However while playing around with it I also noticed that if I leave
status_item as a local var and add a "sleep 1" at the end of
applicationDidFinishLaunching, it also works fine and the status
item never disappears.
So now I'm not sure whether there is a bug or not. In general, what
is the intended behaviour of Macruby with local variables referring
to objects that would have to be retained in obj C when said
variables go out of scope?
Cheerio,
Michael Johnston
lastobe...@mac.com
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