public function getCMSFields()
 {
     $fields = parent::getCMSFields();
     $subsites = DataObject::get('Subsite');
     if (!$subsites) {
         $subsites = new ArrayList();
     } else {
         $subsites = ArrayList::create($subsites->toArray());
     }
     $subsites->push(new ArrayData(array('Title' => 'Main site', 'ID' => 0)));
     $fields->addFieldToTab('Root.Main', DropdownField::create("CopyContentFromID_SubsiteID", _t('SubsitesVirtualPage.SubsiteField', "Subsite"), $subsites->map('ID', 'Title'))->addExtraClass('subsitestreedropdownfield-chooser no-change-track'), 'CopyContentFromID');
     // Setup the linking to the original page.
     $pageSelectionField = new SubsitesTreeDropdownField("CopyContentFromID", _t('VirtualPage.CHOOSE', "Choose a page to link to"), "SiteTree", "ID", "MenuTitle");
     if (Controller::has_curr() && Controller::curr()->getRequest()) {
         $subsiteID = Controller::curr()->getRequest()->requestVar('CopyContentFromID_SubsiteID');
         $pageSelectionField->setSubsiteID($subsiteID);
     }
     $fields->replaceField('CopyContentFromID', $pageSelectionField);
     // Create links back to the original object in the CMS
     if ($this->CopyContentFromID) {
         $editLink = "admin/pages/edit/show/{$this->CopyContentFromID}/?SubsiteID=" . $this->CopyContentFrom()->SubsiteID;
         $linkToContent = "\n\t\t\t\t<a class=\"cmsEditlink\" href=\"{$editLink}\">" . _t('VirtualPage.EDITCONTENT', 'Click here to edit the content') . "</a>";
         $fields->removeByName("VirtualPageContentLinkLabel");
         $fields->addFieldToTab("Root.Main", $linkToContentLabelField = new LabelField('VirtualPageContentLinkLabel', $linkToContent), 'Title');
         $linkToContentLabelField->setAllowHTML(true);
     }
     $fields->addFieldToTab('Root.Main', TextField::create('CustomMetaTitle', $this->fieldLabel('CustomMetaTitle'))->setDescription(_t('SubsitesVirtualPage.OverrideNote', 'Overrides inherited value from the source')), 'MetaTitle');
     $fields->addFieldToTab('Root.Main', TextareaField::create('CustomMetaKeywords', $this->fieldLabel('CustomMetaTitle'))->setDescription(_t('SubsitesVirtualPage.OverrideNote')), 'MetaKeywords');
     $fields->addFieldToTab('Root.Main', TextareaField::create('CustomMetaDescription', $this->fieldLabel('CustomMetaTitle'))->setDescription(_t('SubsitesVirtualPage.OverrideNote')), 'MetaDescription');
     $fields->addFieldToTab('Root.Main', TextField::create('CustomExtraMeta', $this->fieldLabel('CustomMetaTitle'))->setDescription(_t('SubsitesVirtualPage.OverrideNote')), 'ExtraMeta');
     return $fields;
 }
 function getCMSFields()
 {
     $fields = parent::getCMSFields();
     $subsites = DataObject::get('Subsite');
     if (!$subsites) {
         $subsites = new DataObjectSet();
     }
     $subsites->push(new ArrayData(array('Title' => 'Main site', 'ID' => 0)));
     $subsiteSelectionField = new DropdownField("CopyContentFromID_SubsiteID", "Subsite", $subsites->toDropdownMap('ID', 'Title'), $this->CopyContentFromID ? $this->CopyContentFrom()->SubsiteID : Session::get('SubsiteID'));
     $fields->addFieldToTab('Root.Content.Main', $subsiteSelectionField, 'CopyContentFromID');
     // Setup the linking to the original page.
     $pageSelectionField = new SubsitesTreeDropdownField("CopyContentFromID", _t('VirtualPage.CHOOSE', "Choose a page to link to"), "SiteTree", "ID", "MenuTitle");
     $pageSelectionField->setFilterFunction(create_function('$item', 'return !($item instanceof VirtualPage);'));
     if (Controller::has_curr() && Controller::curr()->getRequest()) {
         $subsiteID = Controller::curr()->getRequest()->getVar('CopyContentFromID_SubsiteID');
         $pageSelectionField->setSubsiteID($subsiteID);
     }
     $fields->replaceField('CopyContentFromID', $pageSelectionField);
     // Create links back to the original object in the CMS
     if ($this->CopyContentFromID) {
         $editLink = "admin/show/{$this->CopyContentFromID}/?SubsiteID=" . $this->CopyContentFrom()->SubsiteID;
         $linkToContent = "\n\t\t\t\t<a class=\"cmsEditlink\" href=\"{$editLink}\">" . _t('VirtualPage.EDITCONTENT', 'Click here to edit the content') . "</a>";
         $fields->removeByName("VirtualPageContentLinkLabel");
         $fields->addFieldToTab("Root.Content.Main", $linkToContentLabelField = new LabelField('VirtualPageContentLinkLabel', $linkToContent), 'Title');
         $linkToContentLabelField->setAllowHTML(true);
     }
     $fields->addFieldToTab('Root.Content.Metadata', new TextField('CustomMetaTitle', 'Title (overrides inherited value from the source)'), 'MetaTitle');
     $fields->addFieldToTab('Root.Content.Metadata', new TextareaField('CustomMetaKeywords', 'Keywords (overrides inherited value from the source)'), 'MetaKeywords');
     $fields->addFieldToTab('Root.Content.Metadata', new TextareaField('CustomMetaDescription', 'Description (overrides inherited value from the source)'), 'MetaDescription');
     $fields->addFieldToTab('Root.Content.Metadata', new TextField('CustomExtraMeta', 'Custom Meta Tags (overrides inherited value from the source)'), 'ExtraMeta');
     return $fields;
 }