GridField example inline/inrow Dropdown example (Changing a Persons Salutation)

GridFieldPersonSalutationDropDown.php

<?php

class GridFieldPersonSalutationDropDown implements GridField_ColumnProvider, GridField_URLHandler {
  public function augmentColumns($gridField, &$columns) {
		$columns[] = 'Salutation';
	}

	public function getColumnsHandled($gridField) {
		return array('Salutation');
	}

	public function getColumnContent($gridField, $record, $columnName) {
		if ($record->canEdit()) {
			// TODO exclude JS into external file
			// TODO JS success and error messages
			Requirements::customScript("
				(function($) {
					$('.ss-gridfield .saveSalutation').entwine({
						onclick: function() {
							var val = this.closest('td').find('select').val()
							$.ajax({
								url: this.data('url'),
								data: { value: val },
								type: 'POST',
								success: function(response) { console.log('yay') },
								error: function(response) { console.log('oh noez') }
							})
							return false
						}
					})
				})(jQuery)
			");
			return DropdownField::create('Salutation', '', array(
				'Male' => _t('Person.SalutationMale', 'Mr'),
				'Female' => _t('Person.SalutationFemale', 'Mrs'),
			))->FieldHolder() . sprintf(
				'<button class="%s" data-url="%s">%s</button>',
				'saveSalutation',
				Controller::join_links($gridField->Link('changeSalutation'), $record->ID),
				_t('GridFieldPersonSalutationDropDown.Save', 'Save')
			);
		} elseif ($record->canView()) {
			// TODO return a readonly field
			return '';
		}
		return '';
	}

	public function getColumnAttributes($gridField, $record, $columnName) {
		return array('class' => 'col-Salutation');
	}

	public function getColumnMetadata($gridField, $columnName) {
		return array('title' => _t('GridFieldPersonSalutationDropDown.ColTitle', 'Salutation'));
	}

	public function getURLHandlers($gridField) {
		return array(
			'changeSalutation/$ID' => 'changeSalutation',
		);
	}

	public function changeSalutation(GridField $g, SS_HTTPRequest $r) {
		$record = $g->getList()->byId((int)$r->param('ID'));
		if (!$record->canEdit()) {
			$this->httpError(403);
		}
		$record->Salutation = Convert::raw2sql($r->postVar('value'));
		$record->write();
		return Convert::raw2json(array(
			'success' => true,
		));
	}
}