将新的简单javascript注入magento后端（作为模块） [英] Inject new simple javascript to magento backend (as a module)

问题描述

我想在magento产品管理后端的一些描述和元字段上添加简单的字符计数器功能。就像下面的截图一样。

I want to add simple char counter functionality on some of the description and meta field on magento product administration backend. Just like on this below screenshot.

我通过将简单的原型脚本添加到一个加载的JS文件中来做到这一点magento admin HTML。我选择了browser.js（ /js/mage/adminhtml/browser.js ），因为那是在我的magento安装的后端区域加载的最后一个脚本。这是我的原型脚本代码块：

I did that by adding simple prototype script into one of the JS file which get loaded on magento admin HTML. I choose browser.js (/js/mage/adminhtml/browser.js) for that because that is the last script which get loaded on the backend area of my magento installation. This is my prototype script chunk of code:

/* ADMIN CHAR COUNTER SCRIPT */
Event.observe(window, 'load', function() {

    Element.insert( $('meta_title').up().next().down('span'), { 
        'after': "<div id='meta_title_counter'>Char count: <span id='meta_title_counter_num'>"+(69-$('meta_title').getValue().length)+"</span></div>"
    });
    Element.insert( $('meta_description').up().next().down('span'), { 
        'after': "<div id='meta_description_counter'>Char count: <span id='meta_description_counter_num'>"+(156-$('meta_description').getValue().length)+"</span></div>"
    });
    Element.insert( $('short_description').up().next().down('span'), { 
        'after': "<div id='short_description_counter'>Char count: <span id='short_description_counter_num'>"+$('short_description').getValue().length+"</span></div>"
    });
    Element.insert( $('description').up().next().down('span'), { 
        'after': "<div id='description_counter'>Char count: <span id='description_counter_num'>"+$('description').getValue().length+"</span></div>"
    });

    Event.observe('meta_title', 'keyup', function(event) {  
        $counter = 69-$('meta_title').getValue().length;
        $("meta_title_counter_num").update($counter);
        if($counter < 0){ $("meta_title_counter").setStyle({ color: 'red' }); }
        else{ $("meta_title_counter").setStyle({ color: '#6F8992' }); }
    });
    Event.observe('meta_description', 'keyup', function(event) {
        $counter = 156-this.getValue().length;
        $("meta_description_counter_num").update($counter);
        if($counter < 0){ $("meta_description_counter").setStyle({ color: 'red' }); }
        else{ $("meta_description_counter").setStyle({ color: '#6F8992' }); }
    });
    Event.observe('short_description', 'keyup', function(event) {   $("short_description_counter_num").update(this.getValue().length);  });
    Event.observe('description', 'keyup', function(event) { $("description_counter_num").update(this.getValue().length);    });
});
/* END OF CHAR COUNTER MODULE */

我确实意识到我的意思完成是一个如此快速和肮脏的技巧。我几乎编辑核心文件。这意味着在升级magento后将删除此脚本。我的老板让我把这个功能放到一个模块中。但我没有任何创建magento模块的经验。我试图找到一些关于如何创建简单的magento模块的基础教程。但是这些教程都没有给我一种注入新脚本的方法。这可能是最近的指南：

I do realize that what I've done is such a quick and dirty trick. I practically edit the core file. That means that this script will removed after an upgrade of magento. My boss ask me to put this functionality into a module. But I don't have any experience on creating magento module. I've tried to find some basic tutorial on how to create simple magento module. But none of those tutorial gives me a way to inject new script. This one may be the closest guide:

http://www.magentocommerce.com/wiki/5_-_modules_and_development/admin/how_to_customize_backend_template_f.e._sales_order_information

但我仍然不知道从哪里开始创建这个简单的模块。我很抱歉，如果这个问题感觉太新手了，但我真的需要帮助，而不像平常一样，这次谷歌无法帮助我（或者至少我找不到一个好的关键词来开始谷歌搜索）。所以在这里，我希望那里有人会很乐意帮助我:)。

but I still don't have any idea at all where to start to begin this simple module creation. I'm sorry if this question feels too newbie, but I really need help here and unlike the usual, this time Google can't help me out (or at least I can't find a good keyword to start googling). So here I am hoping that somebody out there would be glad to help me :)

推荐答案

尝试使用管理员布局模块文件更新添加

Try in your module file with admin layout updates add

<adminhtml_catalog_product_edit>
    <reference name="head">
        <action method="addJs"><script>your_js_file.js</script></action>
    </reference>
</adminhtml_catalog_product_edit>

甚至

<default>
    <reference name="head">
        <action method="addJs"><script>your_js_file.js</script></action>
    </reference>
</default>

在所有管理页面上添加你的js文件。

to add load your js file on all admin pages.

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