Flex Tips

1、展开Tree的根节点

/** run by creationComplete event */
  private function initApp():void {
    //set the tree dataProvider
    myTree.dataProvider = xmlTreeData;     
    //since we just set the dataProvider, the tree is not ready yet
    callLater(expandFirstNode);        
  }//initApp

  /**called by callLater to ensure that the tree is ready to 
  have expandItem called on it*/
  private function expandFirstNode():void {
    myTree.expandItem(xmlTreeData,true);  //expand the node
  }

 

2. Flex  定义状态过渡

    http://www.adobe.com/cn/devnet/flex/quickstart/defining_state_transitions/ 

 

3. Flex/Actionscript Javascript communicate 调用

    1) Flex 调用js 函数: ExternalInterface.call("jsFunction", paras);

    2) js 调用 Flex 函数:

        需要在Flex 中注册向js暴露的函数: ExternalInterface.addCallback("asFunctionAlias", asFunction);

        在js中定义一个工具函数：

 

function getContainer(objectId) {
	if(navigator.appName.indexOf("Microsoft") != -1) {
		return window[appId];
	}else {
		return document[appId];
	}
}

        然后就可以调用 Flex/Actionscript 中定义的函数了: getContainer("objectId").asFunctionAlias();

 

 

 

评论

1 楼 yumanbj 2009-03-06  

小弟正在研究flex，不知道怎么和你联系，我的email是：[e-mail]。