Apache Royale Jewel TabBar / SectionContent onShow或valueCommit事件，如sdk 0.9.8中一样？

如何解决Apache Royale Jewel TabBar / SectionContent onShow或valueCommit事件，如sdk 0.9.8中一样？

我有类似的东西：

<j:states>
    <js:State name="login"/>
    <js:State name="loggued"/>
</j:states>
...

<j:Group includeIn="loggued" width="100%" height="100%">

   <j:TabBar localId="tabbar" width="100%"  change="ev_tab_change(event)">
        <j:beads>
            <js:ConstantBinding sourcePropertyName="tabBarDataSample" destinationPropertyName="dataProvider"/>
            <j:AssignTabContent selectedContentProperty="content">
                <j:content>
                    <j:TabBarContent width="100%" y="80" >
                        <royale:TB_One/>
                        <royale:TB_Two/>
                    </j:TabBarContent>
                </j:content>
            </j:AssignTabContent>

        </j:beads>
    </j:TabBar>

</j:Group>

<royale:TB_One/>和<royale:TB_Two/>是<j:SectionContent>

当显示TB_One或TB_Two或以编程方式更改tabbar selectedIndex时，我需要触发一个事件。 我已经在TabBar上尝试过change事件，但是使用selectedIndex进行更改时不会触发该事件

有onShow事件或valueCommit吗？

（暂时tabbar.dispatchEvent(new Event("change"));可以通过编程方式更改selectedIndex来达到目的）

使用的SDK为0.9.8

致谢

解决方法

您可以执行以下操作：

<!-- The TabBar -->
<j:TabBar initComplete="tabbarInitialized(event)"/>

...

<!-- Buttons to change the content programatically -->
<j:Button click="selectContentByIndex(0)" text="0"/>
<j:Button click="selectContentByIndex(1)" text="1"/>

...

<!-- as3 code in script -->
<fx:Script>
    <![CDATA[
        import org.apache.royale.events.Event;

        // when tabbar is initialized make tabbar listen for internal event "selectionChanged"
        // this is the event to use for programmatic changes
        public function tabbarInitialized(event:Event):void
        {
            event.target.addEventListener("selectionChanged",contentChanged);
        }

        // The button change the selection programmatically
        public function selectContentByIndex(index:int):void
        {
            tabbar.selectedIndex = index;
        }
        
        // Here run the code you want. I simply trace the new tabbat selected index and the item
        // but you can calculate the content and operate over tha visual component
        public function contentChanged(event:Event):void
        {
            trace("index:",tabbar.selectedIndex,"content:",tabbar.selectedItem);
        }
    ]]>
</fx:Script>