如何使用SWT浏览器从java脚本函数获取返回值给eclipse函数，而Java脚本函数从ajax请求获取数据？ [英] How to get return value to eclipse function from java script function which get data from ajax request using SWT browser?

问题描述

我在下面尝试过......

I have tried below....

我在Eclipse中有此功能：我在Java中有一个按钮，可在javascript中触发此功能 >

    Object status =  browserCtrl.evaluate("return atm.java.webToJavaPerspective()");

然后我在javascript中具有此功能

function atm.java.webToJavaPerspective(){
  returnData = {};
  //ajaxRequest = some ajaxRequest variable 
  $.when(ajaxRequest).then(function( data, textStatus, jqXHR ) {
    //modify the data
    returnData.textStatus = textStatus;  

    //this return statement should return data to java function
    return returnData;
  });

//this will return empty object
return returnData;
}

但是我总是得到空对象。因为ajax请求需要几秒钟，而我的javascript函数会返回一个空对象，插入的是等待请求返回数据的对象。

But I am always getting empty object. Because the ajax request takes few seconds, and my javascript function returns the empty object insted waiting for request to return data.

如何实现此目标？ >

How can I achieve this..?

推荐答案

在处理Ajax调用时，您必须调用所谓的 BrowserFuntion 从Javascript代码中获得结果。

When dealing with Ajax calls, you'll have to call a so-called BrowserFuntion from your Javascript code when you have the result.

以下是如何定义 BrowserFunction 和如何从Javascript调用它：

Here's an example of how to define a BrowserFunction and how to call it from Javascript:

public static void main(String[] args)
{
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());

    Browser browser = new Browser(shell, SWT.NONE);
    browser.setText("<a href='#' onClick='theJavaFunction()'>Click me!</a>");

    new BrowserFunction(browser, "theJavaFunction")
    {
        @Override
        public Object function(Object[] objects)
        {
            System.out.println("Call from Javascript");

            return null;
        }
    };

    shell.pack();
    shell.open();

    while (!shell.isDisposed())
    {
        if (!display.readAndDispatch())
        {
            display.sleep();
        }
    }
}

此外，关于来自Vogella的浏览器：

Furthermore, an excellent tutorial about Browser from Vogella here:

http://blog.vogella.com/2009/12/21/javascript-swt/

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