如何扩展/覆盖预定义的核心sencha类？ [英] How to Extend/Override a predefined core sencha class?

问题描述

我需要对extjs 4.x核心库应用一些更改，以支持render.h中的从右到左的方向。已经知道它不直接操纵ExtJS代码。

I need to apply some changes into extjs 4.x core library to supports right-to-left direction in rendering.i already know its not good to manipulate the ExtJS code directly.

我的问题是：如何通过在ext-all.js之后加载到页面中的另一个js文件来执行此操作？

My question is: How to do this via another js file that loaded into page after the ext-all.js ?

它可能更改预定义sencha类方法通过调用 Ext.apply（）？

its possible to change a predefined sencha class method by calling Ext.apply() ?

推荐答案

真的取决于你需要修改什么。但我相信你的意思是以下内容。

It really depends what exactly you need to modify. But I believe you meant the following.

我有一个名为 ext-mods.js 的文件，之后 ext-all.js ：

I have a file called ext-mods.js, which is loaded after ext-all.js:

Ext.onReady(function(){

    Ext.override( Ext.data.writer.Json, {
         // We want all records sent to the server be encoded as an array,
         // even if there's a single record
         allowSingle:    false,

         // We only want to send what have changed
         writeAllFields: false
    });

});

我已经更改了所有Json Writers的默认配置，但您可以同样覆盖方法（通过复制来自图书馆的代码，然后应用您的修改）。

I have changed the default config for all Json Writers, but you can equally override methods (by copying the code from the library and then apply your modifications).

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