Thanks to everyone who replied, I think there is probably enough info here to get a solution implemented. Unfortunately I have been pulled onto other tasks so I have not had a chance to test these methods, but I am confident they'll lead me to success.
Thanks again! Ben --- In [email protected], Lachlan Cotter <[EMAIL PROTECTED]> wrote: > > Hi Ben, > > Your problem is probably that you have not told Flex when it needs to > fire the binding. The binding mechanism works by broadcasting events > from the setter methods of bindable properties. If there is no direct > setter involved, then Flex does not automatically know to refresh the > data to the binding destination. > > The best way I know around this issue is to specify the event type > you want to associate with a change to your calculated value, and > then fire that event when ever any of the arguments to that method > change. > > [Bindable("enabledParamsChanged")] > private function isEnabled():Boolean { > if (A) if (B) etc > } > > Then you need to say something like > > private function set valueOfA (arg) { > // Change A here > dispatchEvent(new Event("enabledParamsChanged")); > } > > private function set valueOfB (arg) { > // Change B here > dispatchEvent(new Event("enabledParamsChanged")); > } > > Now Flex knows to fire your isEnabled binding when the arguments to > the calculation are altered. > > Cheers, > Lach > > > On 29/11/2006, at 1:13 AM, ben.clinkinbeard wrote: > > > There was a similar question asked here recently but my needs are > > different so I am starting a new thread. My needs are as follows: I > > have a ComboBox whose enabled state needs to be determined by several > > factors, thus the need for a custom method. The problem is that this > > doesn't seem to work, no matter how I try it. Am I missing something > > or is this just not possible (meaning I have to set a property and > > bind to that)? Fake sample code below: > > > > [Bindable] > > private function isEnabled():Boolean > > { > > if(conditionA) > > { > > if(conditionB) > > { > > return true; > > } > > else > > { > > return false; > > } > > } > > } > > > > <mx:ComboBox id="cb" enabled="{isEnabled()}"/> > > > > Thanks, > > Ben >
