javascript - qooxdoo 错误(qx.html 未定义)

Question

我正在学习 qooxdoo(顺便说一句，我认为它很棒，因为我真的理解它)。不幸的是，在遵循 Twitter 客户端教程时，我在加载页面时遇到了错误。

新建类文件MainWindow.js后

qx.Class.define("twitter.MainWindow",{    extend: qx.ui.window.Window,    construct : function()    {        this.base(arguments, "Tweeter");    }});

I go to the Application.js class file and add

var main = new twitter.MainWindow();    main.open();

which is supposed to let me see the small window.

After running generate.py sourcei get this error in firebug

qx.html is undefined[Break On This Error] return new qx.html.Element("div", styles, attributes); 

I have tried running generate.py with source-all and even build but to no avail.Can someone please help me, I really need to get started with this (I wasted two days trying to work with cappuccino and SproutCore... useless)

UPDATEI solved the issue. Apparently, i was typing the window code outside the application class definition. In my defense, the tutorial said "add this to the end of the Application.js file"

so this

qx.Class.define("twitter.Application",
{
  extend : qx.application.Standalone,

  members :
  {
    main : function()
    {
      // Call super class
      this.base(arguments);

      // Enable logging in debug variant
      if (qx.core.Environment.get("qx.debug"))
      {
        qx.log.appender.Native;
        qx.log.appender.Console;
      }


    }
  }
});

var main = new twitter.MainWindow();
        main.open();

本该如此

qx.Class.define("twitter.Application",
{
  extend : qx.application.Standalone,

  members :
  {

    main : function()
    {
      // Call super class
      this.base(arguments);

      // Enable logging in debug variant
      if (qx.core.Environment.get("qx.debug"))
      {
        qx.log.appender.Native;
        qx.log.appender.Console;
      }

      var main = new twitter.MainWindow();
        main.open();
    }
  }
});

Answer 1

很好，你自己解决了这一切:-)。是的，教程文本在这一点上含糊不清，我将提交一个错误来修复它。

一般来说，qooxdoo 对其类定义使用“封闭形式”。与特定类有关的所有信息都在这张传递给 qx.Class.define 的大 map 中。该手册对类定义的各种元素进行了一定程度的解释，也许您会发现这很有帮助(参见例如 here )。

另一方面，您首先做的是完全合法的 JavaScript，因此您没有遇到任何会导致生成器立即退出的语法错误。不过，您应该已经在生成器输出中看到了警告。