透视ext JavaScript类的相关内容

文章 2011-02-21 来自：开发者社区

透视Ext JS 4类背后的机制与特点（下）

在构建 Ext.Class 之时，它会分配既细又专的处理器（processors），专门处理构成类定义的每一个部分。当前Ext缺省提供了一些处理器，包括有：mixins 多态的，配置项函数的，以及处理类扩展的都是必备的。除了缺省处理器外，还可以随便自定义预处理器，预处理器是完全交给开发者可控的。因为通过分解类处理单元，就可以达到了扩展性的目的，以便允许我们针对不同的场景，去制定更合适的处理器从而....

文章 2011-02-21 来自：开发者社区

透视Ext JS 4类背后的机制与特点（中）

配置项config 最后要说明的是“config”配置项对象。配置项对象就是Ext组件的参数，它以对象的key/value形式出现。大多数的配置项可以在运行时作改变。上面的例子中，我们声明了Ext.Windows的“title”配置项，默认值为“Window Title”。设置类的期间就会有这四个方法给我们： getTitle()，setTitl...

文章 2011-02-21 来自：开发者社区

透视Ext JS 4类背后的机制与特点（上）

上次的资料中我们跟大家介绍了Ext JS 4 的类机制大概如何，主要围绕传统 OO 机制而设计，从而打算弥补了 Prototype 继承的不足。虽然性质上仍为模拟手段，但包含了比旧版本更为完整的 OO 特征。Ext JS 4（连同 Ext Core）提供的新功能有：继承方面用 Ext.defined 代替了原来 Ext.extend 的写法。自动计算依赖关系及动态类加载。多态静态成员 .....

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