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68 lines
2.2 KiB
Markdown
68 lines
2.2 KiB
Markdown
# Extending the CMS
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CMSMain is part of the CMS. It is the controller for the content editor.
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## Creating another hierarchical editor by subclassing CMSMain
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Sometimes you'll want to provide an administration interface that is pretty much exactly what CMSMain provides, but it's
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not appropriate to include your data in with the site content. For example, Hayden developed a hierarchical category
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administrator on the Guano application.
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Here's how you can do this:
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## Using classes other than SiteTree in the site tree
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It is possible to use to different classes in two separate site trees. In Guano for example, there is the usual site
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content tree and a category tree. To change that find:
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:::php
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static $tree_class = 'SiteTree';
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And change the string to the name of the class that will be the base class for classes visible in the site tree.
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## Overloading page urls
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If using a url other than admin/ for your section then you will need to change the SiteTreeHandlers to use the correct
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controller.
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Create the init method:
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:::php
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function init() {
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parent::init();
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Requirements::javascript('project-name/javascript/Classname_left.js');
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}
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Where project-name and Classname are changed as appropriate.
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Create the javascript file and add the handlers:
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:::php
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if(typeof SiteTreeHandlers == 'undefined') SiteTreeHandlers = {};
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SiteTreeHandlers.parentChanged_url = 'url/ajaxupdateparent';
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SiteTreeHandlers.orderChanged_url = 'url/ajaxupdatesort';
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SiteTreeHandlers.showRecord_url = 'url/show/';
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SiteTreeHandlers.loadPage_url = 'url/show/';
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SiteTreeHandlers.loadTree_url = 'url/getsubtree';
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where url is the relative link to the page (eg 'admin/categories'). You can change the handler functions as necessary.
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## Overloading EditForm
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You may need to overload EditForm if your class does not use the Versioned extension.
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## Overloading SiteTreeAsUL
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The tree hints can sometimes cause problems when reorganising the tree, and the CMSMain::SiteTreeAsUL function uses
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SiteTree explicitly. Use:
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:::php
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public function SiteTreeAsUL() {
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// $this->generateDataTreeHints();
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$this->generateTreeStylingJS();
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return $this->getSiteTreeFor( $this->stat('tree_class') );
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}
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