myDropDownList.as

package components
{
    import mx.collections.IList;
    import mx.controls.Alert;
    import mx.utils.ObjectUtil;

    import spark.components.DropDownList;

    public class myDropDownList extends DropDownList
    {
        public function myDropDownList()
        {
            super();
        }

        [Bindable]
        private var _textField:*;

        [Bindable]
        public function get textField():*
        {
            return _textField;
        }

        public function set textField(value:*):void
        {
            textField = this.getListValue(value);
        }

        private function getListValue(value:*):*
        {
            if (value == null)
            {
                selectedIndex = -1;
                return;
            }
            for each (var obj:Object in dataProvider)
            {
                if (ObjectUtil.compare(obj.cCdId.toString(), value) == 0)
                {
                    super.selectedIndex = dataProvider.getItemIndex(obj);
                    return value;
                }
            }
            return value;
        }

        override public function set dataProvider(value:IList): void
        {
            super.dataProvider = value;
            if (selectedItem != null)
            {
                textField = this.getListValue(selectedItem.cCdId);
            }
        }

/*** Versão do Bruno (DCLICK)
        private function getListValue(value:*):*
        {
            if (value == null)
            {
                selectedIndex = -1;
                return;
            }
            for each (var obj:Object in dataProvider)
            {
                if (ObjectUtil.compare(obj, value) == 0)
                {
                    return obj;
                }
            }
            return value;
        }

        override public function set selectedItem(value:*): void
        {
            super.selectedItem = this.getListValue(value);
        }

        override public function set dataProvider(value:IList): void
        {
            super.dataProvider = value;
            if (selectedItem != null)
            {
                super.selectedItem = this.getListValue(selectedItem);
            }
        }

***/
    }
}