silverstripe-framework/forms/gridfield/GridFieldLevelup.php

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<?php
use SilverStripe\ORM\DataObject;
use SilverStripe\ORM\FieldType\DBField;
/**
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* Adds a "level up" link to a GridField table, which is useful when viewing
* hierarchical data. Requires the managed record to have a "getParent()"
* method or has_one relationship called "Parent".
*
* @package forms
* @subpackage fields-gridfield
*/
class GridFieldLevelup extends Object implements GridField_HTMLProvider {
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/**
* @var integer - the record id of the level up to
*/
protected $currentID = null;
/**
* sprintf() spec for link to link to parent.
* Only supports one variable replacement - the parent ID.
* @var string
*/
protected $linkSpec = '';
/**
* @var array Extra attributes for the link
*/
protected $attributes = array();
/**
*
* @param integer $currentID - The ID of the current item; this button will find that item's parent
*/
public function __construct($currentID) {
parent::__construct();
if($currentID && is_numeric($currentID)) {
$this->currentID = $currentID;
}
}
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public function getHTMLFragments($gridField) {
$modelClass = $gridField->getModelClass();
$parentID = 0;
if(!$this->currentID) {
return null;
}
$modelObj = DataObject::get_by_id($modelClass, $this->currentID);
$parent = null;
if($modelObj->hasMethod('getParent')) {
$parent = $modelObj->getParent();
} elseif($modelObj->ParentID) {
$parent = $modelObj->Parent();
}
if ($parent) {
$parentID = $parent->ID;
}
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// Attributes
$attrs = array_merge($this->attributes, array(
'href' => sprintf($this->linkSpec, $parentID),
'class' => 'cms-panel-link ss-ui-button font-icon-level-up no-text grid-levelup'
));
$linkTag = FormField::create_tag('a', $attrs);
$forTemplate = new ArrayData(array(
'UpLink' => DBField::create_field('HTMLFragment', $linkTag)
));
$template = SSViewer::get_templates_by_class($this, '', __CLASS__);
return array(
'before' => $forTemplate->renderWith($template),
);
}
public function setAttributes($attrs) {
$this->attributes = $attrs;
return $this;
}
public function getAttributes() {
return $this->attributes;
}
public function setLinkSpec($link) {
$this->linkSpec = $link;
return $this;
}
public function getLinkSpec() {
return $this->linkSpec;
}
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}