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Re: Simple bindings Boolean test for 'nothing selected'

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Re: Simple bindings Boolean test for 'nothing selected'

Subject: Re: Simple bindings Boolean test for 'nothing selected'
From: Tim Lucas <email@hidden>
Date: Mon, 20 Jun 2005 23:42:00 +1000

On 20/06/2005, at 1:20 PM, Andrew White wrote:

I have an NSTableView. I want another control to check whether there is a current selection. I can get it to work using selection.property and use the fact that the selection placeholder will return nil and thus the whole result is 'nil'.

See "Available Value Transformers": http://developer.apple.com/documentation/Cocoa/Conceptual/ ValueTransformers/Concepts/TransformersAvail.html

You'll want to specify NSIsNotNilTransformerName (available in IB's default set of value transformers) as the value transformer for the binding, or instead just bind to "myController.selection.@count"

- tim lucas

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  >Simple bindings Boolean test for 'nothing selected' (From: Andrew White <email@hidden>)




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