Problema en la devolución de los valores de la función JavaScript para flexionar

StackOverflow https://stackoverflow.com/questions/1088104

Pregunta

En el código flex adjunto, que estoy tratando de llamar a una función javascript en su contenedor de HTML. El ejemplo es también viven en: http://www.cse.epicenterlabs.com/mbm/ajax_api.html El problema que estoy enfrentando es, que tengo que hacer clic en el botón dos veces para obtener la salida deseada. Parece que hay un cierto retraso en el establecimiento de la variable "de salida". ¿Cómo podría obtener la salida de la función JavaScript en un clic? 

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:TextArea x="209" y="139" height="245" width="318"  id="text1" fontSize="28"/>
    <mx:Script>
        <![CDATA[
                import mx.rpc.events.ResultEvent;
    import flash.external.*;

     public function callWrapper():void {
        var s:String;
        if (ExternalInterface.available) {
           var wrapperFunction:String = "initialize";
           s = ExternalInterface.call(wrapperFunction,text1.text);
           text1.text = s;

        } else {
           s = "Wrapper not available";
        }
        trace(s); 
     }

                ]]>
    </mx:Script>
    <mx:Button x="92" y="118" label="Transliterate" click="callWrapper()"/>
</mx:Application>

HTML Envoltura: 

<!-- saved from url=(0014)about:internet -->
<html lang="en">

<!-- 
Smart developers always View Source. 

This application was built using Adobe Flex, an open source framework
for building rich Internet applications that get delivered via the
Flash Player or to desktops via Adobe AIR. 

Learn more about Flex at http://flex.org 
// -->

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<!--  BEGIN Browser History required section -->
<link rel="stylesheet" type="text/css" href="history/history.css" />
<!--  END Browser History required section -->

<title></title>
<script src="AC_OETags.js" language="javascript"></script>

<!--  BEGIN Browser History required section -->
<script src="history/history.js" language="javascript"></script>
<!--  END Browser History required section -->

<style>
body { margin: 0px; overflow:hidden }
</style>
<script language="JavaScript" type="text/javascript">
<!--
// -----------------------------------------------------------------------------
// Globals
// Major version of Flash required
var requiredMajorVersion = 9;
// Minor version of Flash required
var requiredMinorVersion = 0;
// Minor version of Flash required
var requiredRevision = 28;
// -----------------------------------------------------------------------------
// -->
</script>
</head>

<body scroll="no">
      <script type="text/javascript" src="http://www.google.com/jsapi"></script>
    <script type="text/javascript">

    google.load("language", "1");

        var output;
    function initialize(input) {
      google.language.transliterate([input], "en", "hi", function(result) {
        if (!result.error) {
          if (result.transliterations && result.transliterations.length > 0 &&
            result.transliterations[0].transliteratedWords.length > 0) {
            output = result.transliterations[0].transliteratedWords[0];
          }
        }
      });
    return output;
    }
    </script>
    <script language="JavaScript" type="text/javascript">
<!--
// Version check for the Flash Player that has the ability to start Player Product Install (6.0r65)
var hasProductInstall = DetectFlashVer(6, 0, 65);

// Version check based upon the values defined in globals
var hasRequestedVersion = DetectFlashVer(requiredMajorVersion, requiredMinorVersion, requiredRevision);

if ( hasProductInstall && !hasRequestedVersion ) {
    // DO NOT MODIFY THE FOLLOWING FOUR LINES
    // Location visited after installation is complete if installation is required
    var MMPlayerType = (isIE == true) ? "ActiveX" : "PlugIn";
    var MMredirectURL = window.location;
    document.title = document.title.slice(0, 47) + " - Flash Player Installation";
    var MMdoctitle = document.title;

    AC_FL_RunContent(
        "src", "playerProductInstall",
        "FlashVars", "MMredirectURL="+MMredirectURL+'&MMplayerType='+MMPlayerType+'&MMdoctitle='+MMdoctitle+"",
        "width", "100%",
        "height", "100%",
        "align", "middle",
        "id", "ajax_api",
        "quality", "high",
        "bgcolor", "#869ca7",
        "name", "ajax_api",
        "allowScriptAccess","sameDomain",
        "type", "application/x-shockwave-flash",
        "pluginspage", "http://www.adobe.com/go/getflashplayer"
    );
} else if (hasRequestedVersion) {
    // if we've detected an acceptable version
    // embed the Flash Content SWF when all tests are passed
    AC_FL_RunContent(
            "src", "ajax_api",
            "width", "100%",
            "height", "100%",
            "align", "middle",
            "id", "ajax_api",
            "quality", "high",
            "bgcolor", "#869ca7",
            "name", "ajax_api",
            "allowScriptAccess","sameDomain",
            "type", "application/x-shockwave-flash",
            "pluginspage", "http://www.adobe.com/go/getflashplayer"
    );
  } else {  // flash is too old or we can't detect the plugin
    var alternateContent = 'Alternate HTML content should be placed here. '
    + 'This content requires the Adobe Flash Player. '
    + '<a href=http://www.adobe.com/go/getflash/>Get Flash</a>';
    document.write(alternateContent);  // insert non-flash content
  }
// -->
</script>
<noscript>
    <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
            id="ajax_api" width="100%" height="100%"
            codebase="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab">
            <param name="movie" value="ajax_api.swf" />
            <param name="quality" value="high" />
            <param name="bgcolor" value="#869ca7" />
            <param name="allowScriptAccess" value="sameDomain" />
            <embed src="ajax_api.swf" quality="high" bgcolor="#869ca7"
                width="100%" height="100%" name="ajax_api" align="middle"
                play="true"
                loop="false"
                quality="high"
                allowScriptAccess="sameDomain"
                type="application/x-shockwave-flash"
                pluginspage="http://www.adobe.com/go/getflashplayer">
            </embed>
    </object>
</noscript>
</body>
</html>
¿Fue útil?

Solución

Esto se debe a google.language.transliterate no es una operación sincrónica. Su función initialize vuelve incluso antes de que haya terminado de ejecutarse google.language.transliterate (razón por la cual va a conectar una llamada de retorno para funcionar después de que se hace).

Es necesario devolver la llamada a una función ActionScript después transliterate está hecho. Explora ExternalInterface.addCallback () para añadir una función de ActionScript puede llamar desde JavaScript.

Otros consejos

La llamada a google.language.transliterate en el código JavaScript es asíncrona, es por eso que parece que hay que pulsar el botón dos veces. La función anónima que se pasa como el cuarto argumento no se ejecuta hasta que se haya cargado algunos datos.

Tal vez debería mostrar algún tipo de indicador de carga justo antes de llamar google.language.transliterate y después ocultarlo en el controlador? De esa manera se vería cuando es la carga de datos.

Se puede crear un archivo HTML utilizando la secuencia de comandos y el uso que el interior de componente de Flex HTML.

Ejemplo: 

<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
    <mx:HTML id="html"
        width="100%"
        height="100%"
        location="{serverIp}/Translit.html"/>
</mx:WindowedApplication>

Gracias chicos, funcionó. Te adjunto el código de trabajo aquí:

código Flex: ( ajax_api.mxml ) 

<?xml version="1.0" encoding="utf-8"?>
    <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
        <mx:TextArea x="209" y="139" height="245" width="318"  id="text1" fontSize="28"/>
        <mx:Script>
            <![CDATA[
                import mx.rpc.events.ResultEvent;
        import flash.external.*;

         public function callWrapper():void {
            var s:String;
            if (ExternalInterface.available) {
       ExternalInterface.addCallback("g", g);
               var wrapperFunction:String = "initialize";
               ExternalInterface.call(wrapperFunction,text1.text);

            } else {
               s = "Wrapper not available";
            }
            trace(s); 
         }
         public function g(str:String):void
         {
            text1.text = str;
         }

                ]]>
        </mx:Script>
        <mx:Button x="75" y="50" label="Enter some text and click this button to see the transliteration output" click="callWrapper()" height="37"/>
    </mx:Application>

HTML Envoltura: 

<!-- saved from url=(0014)about:internet -->
<html lang="en">

<!-- 
Smart developers always View Source. 

This application was built using Adobe Flex, an open source framework
for building rich Internet applications that get delivered via the
Flash Player or to desktops via Adobe AIR. 

Learn more about Flex at http://flex.org 
// -->

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<!--  BEGIN Browser History required section -->
<link rel="stylesheet" type="text/css" href="history/history.css" />
<!--  END Browser History required section -->

<title>ajax_api</title>
<script src="AC_OETags.js" language="javascript"></script>

<!--  BEGIN Browser History required section -->
<script src="history/history.js" language="javascript"></script>
<!--  END Browser History required section -->

<style>
body { margin: 0px; overflow:hidden }
</style>
<script language="JavaScript" type="text/javascript">
<!--
// -----------------------------------------------------------------------------
// Globals
// Major version of Flash required
var requiredMajorVersion = 9;
// Minor version of Flash required
var requiredMinorVersion = 0;
// Minor version of Flash required
var requiredRevision = 28;
// -----------------------------------------------------------------------------
// -->
</script>
</head>

<body scroll="no">
      <script type="text/javascript" src="http://www.google.com/jsapi"></script>
    <script type="text/javascript">

    google.load("language", "1");
function thisMovie(movieName)
{

    if(navigator.appName.indexOf("Microsoft")!=-1)
    {
        alert("microsoft");
        return window[movieName];
    }
    else
    {
        return document[movieName];
    }
}

function initialize(input) {
      google.language.transliterate([input], "en", "hi", function(result) {
        if (!result.error) {
          var container = document.getElementById("transliteration");
          if (result.transliterations && result.transliterations.length > 0 &&
            result.transliterations[0].transliteratedWords.length > 0) {
            output = result.transliterations[0].transliteratedWords[0];
        thisMovie("ajax_api").g(output);
          }
        }
      });
    }

    </script>
    <script language="JavaScript" type="text/javascript">
<!--
// Version check for the Flash Player that has the ability to start Player Product Install (6.0r65)
var hasProductInstall = DetectFlashVer(6, 0, 65);

// Version check based upon the values defined in globals
var hasRequestedVersion = DetectFlashVer(requiredMajorVersion, requiredMinorVersion, requiredRevision);

if ( hasProductInstall && !hasRequestedVersion ) {
    // DO NOT MODIFY THE FOLLOWING FOUR LINES
    // Location visited after installation is complete if installation is required
    var MMPlayerType = (isIE == true) ? "ActiveX" : "PlugIn";
    var MMredirectURL = window.location;
    document.title = document.title.slice(0, 47) + " - Flash Player Installation";
    var MMdoctitle = document.title;

    AC_FL_RunContent(
        "src", "playerProductInstall",
        "FlashVars", "MMredirectURL="+MMredirectURL+'&MMplayerType='+MMPlayerType+'&MMdoctitle='+MMdoctitle+"",
        "width", "100%",
        "height", "100%",
        "align", "middle",
        "id", "ajax_api",
        "quality", "high",
        "bgcolor", "#869ca7",
        "name", "ajax_api",
        "allowScriptAccess","sameDomain",
        "type", "application/x-shockwave-flash",
        "pluginspage", "http://www.adobe.com/go/getflashplayer"
    );
} else if (hasRequestedVersion) {
    // if we've detected an acceptable version
    // embed the Flash Content SWF when all tests are passed
    AC_FL_RunContent(
            "src", "ajax_api",
            "width", "100%",
            "height", "100%",
            "align", "middle",
            "id", "ajax_api",
            "quality", "high",
            "bgcolor", "#869ca7",
            "name", "ajax_api",
            "allowScriptAccess","sameDomain",
            "type", "application/x-shockwave-flash",
            "pluginspage", "http://www.adobe.com/go/getflashplayer"
    );
  } else {  // flash is too old or we can't detect the plugin
    var alternateContent = 'Alternate HTML content should be placed here. '
    + 'This content requires the Adobe Flash Player. '
    + '<a href=http://www.adobe.com/go/getflash/>Get Flash</a>';
    document.write(alternateContent);  // insert non-flash content
  }
// -->
</script>
<noscript>
    <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
            id="ajax_api" width="100%" height="100%"
            codebase="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab">
            <param name="movie" value="ajax_api.swf" />
            <param name="quality" value="high" />
            <param name="bgcolor" value="#869ca7" />
            <param name="allowScriptAccess" value="sameDomain" />
            <embed src="ajax_api.swf" quality="high" bgcolor="#869ca7"
                width="100%" height="100%" name="ajax_api" align="middle"
                play="true"
                loop="false"
                quality="high"
                allowScriptAccess="sameDomain"
                type="application/x-shockwave-flash"
                pluginspage="http://www.adobe.com/go/getflashplayer">
            </embed>
    </object>
</noscript>
</body>
</html>
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