Question

I’ve trouble getting my components to update when the params has changed:

package mycompany {      import flash.events.Event;     import mx.events.SliderEvent;     import mx.controls.HSlider;     import mx.controls.sliderClasses.Slider;      public class FromToSlider extends HSlider     {          /* from: */          private var _from:int;          [Bindable]         public function get from():int         {             return _from;         }          public function set from(value:int):void         {             this._from = value;             this.values[0] = value;             invalidateProperties();         }          /* //from */          /* to: */          private var _to:int;          [Bindable]         public function get to():int         {             return _to;         }          public function set to(value:int):void         {             this._to = value;             this.values[1] = value;         }          /* //to */          override public function initialize():void         {             super.initialize();             addEventListener(SliderEvent.CHANGE, handleChange, false, 0, true);         }          protected function handleChange(event:SliderEvent):void         {             var ct:Slider=Slider(event.currentTarget);             this.from = ct.values[0];             this.to = ct.values[1];         }      } } 

When I set ‘from’ and ‘to’ the thumbs aren’t updating. I’ve tried invalidateProperties but that didn’t work.

Answer 1

Add a call to invalidateDisplayList() after invalidateProperties(). That will ensure that Flex redraws the component on the next keyframe.

You should also add the same to the ‘set to()’ function.