在Grails中应用Extjs

最新推荐文章于 2016-07-07 12:20:15 发布

东子哥7

最新推荐文章于 2016-07-07 12:20:15 发布

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分类专栏： Java/Groovy&Grails

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本文介绍了一款已停用的Grails插件，该插件用于将ExtJS JavaScript库集成到Grails应用中。安装插件后，可以自动下载并安装ExtJS库，并通过自适应AJAX标签进行使用。此外，还提供了两个辅助标签来轻松包含额外的ExtJS JavaScript和CSS文件。

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This plugin is discontinued by it's author due to the ExtJS license fiasco emerged recently.

This plugin provides integration with the Ext JavaScript Library. When installing the plugin, it downloads and installs automatically the latest Ext 2.0.2 distribution in your application, and registers itself to be used with the adapative AJAX tags. It also contains two helper tags to easily include additional Ext javascript and css files as well.

Installation

To install the Ext plugin type this command from your project's root folder:

grails install-plugin ext

The complete Ext distribution is downloaded and installed under your project's \web-app\js\ext\2.0.2 folder.

Usage

To use Grails' adaptive AJAX support just add the folowing line in the head section:

<g:javascript library="ext" />

If you want to include additional Ext javascript and css files include them using:

<ext:javascript dir="build/widgets" file="MessageBox-min.js" />
<ext:javascript dir="build/widgets" file="MessageBox-min.js" version="2.0.1" /> 
// version to be used in case multiple version installed
<ext:stylesheet dir="resources/css" file="ext-all.css" />

Overriding default javascript files

By default ext-base.js and ext-core.js are included when using <g:javascript library="ext" />. Adding additional libraries to the default list can be done in a BootStrap class:

import org.codehaus.groovy.grails.plugins.web.taglib.JavascriptTagLib

class BootStrap {
    def init = { servletContext ->
        JavascriptTagLib.LIBRARY_MAPPINGS.ext += ["ext/2.0.2/build/widgets/MessageBox-min", ..]
    }
    def destroy = {
    }
}

It's also possible to replace all default included javascript libraries. For example if you want to use ext-all.js instead of ext-core.js. Just incorporate the following into your BootStrap.

import grails.util.GrailsUtil
import org.codehaus.groovy.grails.plugins.web.taglib.JavascriptTagLib

class BootStrap {
    def init = { servletContext ->
        JavascriptTagLib.LIBRARY_MAPPINGS.ext = ["ext/2.0.2/adapter/ext/ext-base", "ext/2.0.2/ext-all"]
    }
    def destroy = {
    }
}

If you want to include debug versions of the included javascript files in your development environment, do something like:

import grails.util.GrailsUtil
import org.codehaus.groovy.grails.plugins.web.taglib.JavascriptTagLib

class BootStrap {
    def init = { servletContext ->
        if (GrailsUtil.isDevelopmentEnv()) {
            JavascriptTagLib.LIBRARY_MAPPINGS.ext = ["ext/2.0.2/adapter/ext/ext-base", "ext/$2.0.2/ext-core-debug"]
        }
    }
    def destroy = {
    }
}