Ahh I see. That works for a button, but with a toolbar button it makes the button flash momentarily, but then stays non-enabled. Any ideas?
--- On Tue, 8/12/08, Ron Lue-Sang <[EMAIL PROTECTED]> wrote: > From: Ron Lue-Sang <[EMAIL PROTECTED]> > Subject: Re: Is this how you can use bindings? > To: "Chris Idou" <[EMAIL PROTECTED]> > Cc: "cocoa-dev@lists.apple.com" <cocoa-dev@lists.apple.com> > Date: Tuesday, August 12, 2008, 11:56 PM > The way to think about this is, you bind the value of the > text field > to a controller (or model) object that owns the value. > Then, bind the > enabled binding of the button to the same property of of > the same > controller and use a valuetransformer to check whether the > value is nil. > > So your setup should look like: > - TextField value binding bound to yourObject with keypath > > yourStringProperty > - button enabled binding bound to yourObject with keypath > yourStringProperty with value transformer NSIsNotNil > > You may want to turn on "continuously updates > value" for the > textfiled's value binding.This way as soon as the user > starts typing, > the enabled state of the button will get toggled. > > Note that part of why this works with the value transformer > is because > the textfield value binding sets nil as the value when the > textfield > is emptied. > > --------------------- > RONZILLA > > On Aug 12, 2008, at 11:21 PM, Chris Idou > <[EMAIL PROTECTED]> wrote: > > > I want a button to be enabled when myTextField is not > empty. > > > > Can have an outlet in my controller called > myTextField, and then set > > the "Enabled" binding on the button to point > to > > myTextField.stringValue.length, then can I write a > transformer > > called GreaterThanZero to return boolean if the input > is greater > > than zero? > > > > Is that a valid way to go about this problem? It > doesn't seem to be > > working for me. I wrote a myTextField accessor to see > what is > > happening and it doesn't even seem to get called. > > > > > > > > > > > > > > _______________________________________________ > > > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > > > Please do not post admin requests or moderator > comments to the list. > > Contact the moderators at > cocoa-dev-admins(at)lists.apple.com > > > > Help/Unsubscribe/Update your Subscription: > > > http://lists.apple.com/mailman/options/cocoa-dev/luesang%40apple.com > > > > This email sent to [EMAIL PROTECTED] _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
