TextFlow 内的链接：rollOver/rollOut 冒泡，不应该冒泡，并且无法避免

Question

我有一个奇怪的行为。我在 TextFlow 中有一个 HTML 链接。当我设置其 linkHoverFormat 时，它开始向链上发送 rollOver/rollOut 事件。这些事件表明它们不会冒泡，但不知何故它们确实发生了。我似乎无法阻止他们这样做。

下面是一个示例：

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
                       xmlns:s="library://ns.adobe.com/flex/spark" 
                       xmlns:mx="library://ns.adobe.com/flex/mx">

  <fx:Declarations>
    <s:TextLayoutFormat id="linkNormal" textDecoration="none" color="0x556677"/>  
    <s:TextLayoutFormat id="linkHover" textDecoration="underline" color="0x0000FF"/>
    <s:TextFlow id="textFlow1" 
                linkActiveFormat="{linkHover}" 
                linkHoverFormat="{linkHover}"
                linkNormalFormat="{linkNormal}">
      <s:p> <s:a href="http://projects.nunogodinho.com">hover</s:a> </s:p>
    </s:TextFlow>
  </fx:Declarations>

  <fx:Script>
    <![CDATA[

      // This pair of handlers is triggered by the panel
      protected function rollOverHandler(e:MouseEvent):void {
        panel.title = "over";
      }
      protected function rollOutHandler(e:MouseEvent):void {
        panel.title = "out";
      }

    ]]>
  </fx:Script>

  <s:Panel left="10" top="10" id="panel" mouseOver="rollOverHandler(event)" mouseOut="rollOutHandler(event)">
    <s:RichEditableText id="ret1"
                        top="10"
                        editable="false"
                        textFlow="{textFlow1}" />
  </s:Panel>

</s:WindowedApplication>

如果您运行此应用程序并将鼠标在链接上移动几次而不移出面板，您将看到它仍然会更改文本。

所以我决定尝试阻止这个奇怪的事件冒泡：

<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
                       xmlns:s="library://ns.adobe.com/flex/spark" 
                       xmlns:mx="library://ns.adobe.com/flex/mx">

  <fx:Declarations>
    <s:TextLayoutFormat id="linkNormal" textDecoration="none" color="0x556677"/>  
    <s:TextLayoutFormat id="linkHover" textDecoration="underline" color="0x0000FF"/>
    <s:TextFlow id="textFlow2" 
                linkActiveFormat="{linkHover}" 
                linkHoverFormat="{linkHover}"
                linkNormalFormat="{linkNormal}">
      <s:p> <s:a rollOver="linkelement2_rollOverHandler(event)" rollOut="linkelement2_rollOutHandler(event)" href="http://projects.nunogodinho.com">hover</s:a> </s:p>
    </s:TextFlow>
  </fx:Declarations>

  <fx:Script>
    <![CDATA[
      import flashx.textLayout.events.FlowElementMouseEvent;

      // This pair of handlers is triggered by the panel
      protected function rollOverHandler(e:MouseEvent):void {
        panel.title = "over";
      }
      protected function rollOutHandler(e:MouseEvent):void {
        panel.title = "out";
      }

      // This pair of handlers is triggered by the <A> element inside textFlow2
      // and I hoped it would stop the event from bubbling up to the panel
      protected function linkelement2_rollOverHandler(e:FlowElementMouseEvent):void {
        e.preventDefault();
        e.stopImmediatePropagation();
        e.stopPropagation()
      }
      protected function linkelement2_rollOutHandler(e:FlowElementMouseEvent):void {
        e.preventDefault();
        e.stopImmediatePropagation();
        e.stopPropagation()
      }

      // I also tried to intercept the event in the RichEditableText but got the same weird
      // behavior: the event triggers the panel's rollOver/rollOut intermittently


    ]]>
  </fx:Script>

  <s:Panel left="10" top="10" id="panel" mouseOver="rollOverHandler(event)" mouseOut="rollOutHandler(event)">
    <s:RichEditableText top="10" left="55"
                        editable="false"
                        textFlow="{textFlow2}" />
  </s:Panel>

</s:WindowedApplication>

我尝试了 preventDefault、stopImmediatePropagation 和 stopPropagation 的所有组合。它确实改变了事件的行为，但也破坏了链接上的悬停效果。

然后我尝试在 RichEditableText 处拦截该事件，但得到了相同的结果。

有一次我遇到了类似的问题，但我了解到这是因为我使用了 mouseOver/mouseOut 事件而不是 rollOver/rollOut。自从我切换到 rollOver/rollOut 后，它工作得很好。到目前为止。

而现在我却一无所知。

请帮忙。

谢谢。