[MacRuby-devel] Cocoa Binding to NSArrayController

John Shea johnmacshea at gmail.com
Tue Jan 12 17:48:42 PST 2010

Perhaps it is this bug here: https://www.macruby.org/trac/ticket/473

In my case with the current 0.5 beta2 no float or integer binding to nscontrol works (I get all 1's) unless the float or integer is converted to an NSDecimalNumber using a ValueTransformer.
This is what i use for each float binding as a work around:

class ToDecimalTransformer < NSValueTransformer 
	def self.transformedValueClass; NSDecimalNumber.class; end
	def self.allowsReverseTransformation; true; end 
	def transformedValue(value)
  	def reverseTransformedValue(value)
	  	new_val = value.to_f


On Jan 12, 2010, at 7:33 PM, steve ross wrote:

> On Jan 11, 2010, at 11:13 AM, isaac kearse wrote:
>> Looks like you're bypassing the to_i conversion of @number by calling instance_variable_set directly, but I'd guess that the problem is somewhere else in the app.
>> Any chance you could put the whole thing up on github?
>> Cheers,
>> Isaac
> I put together an Objective-C version of this same thing and checked it into the github project for comparison. It works. I'm sure there's something different in how I'm using it, but I can't see what. The project is at:
> git at github.com:sxross/MacRuby-Array-Cocoa-Array-Binding.git
> That's both MacRuby and Objective-C. Any pointers to my blind spot are appreciated :)
> Steve
>> On Tue, Jan 12, 2010 at 6:41 AM, steve ross <cwdinfo at gmail.com> wrote:
>> I wrote a simple controller that binds to an NSTableView. In the tableview, a column has an NSNumberFormatter (in IB), but the column is what's bound. It's bound to LightboxController.managedObjects:number. The managedObjects collection contains a collection of Lightbox objects, that have a number (Fixnum, when examined) and a title (string). The title displays fine, but the number always displays as 1. Changing the number field to a string and removing the NSNumberFormatter produces the correct display, but of course, the sort order is string ordering rather than numeric.
>> Here is the code. Can anyone tell me what I'm missing here?
>> https://gist.github.com/5d490492a814eccd26b2
>> Thx,
>> Steve
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