This widget is meant to define one or more select input fields side by side and as many rows as you want.

Look

The widget looks exactly the same like the ModuleWizard of the Contao core. The problem with this wizard is that the sources (SELECT * FROM tl_module etc.) are all hardcoded and it's therefore useless for third party developers.

MultiSelectWizard

Usage

There are two different ways of using the widget. Either by providing the data directly using "columnsData" in the "eval" array or with a callback.

Providing columnsData

$GLOBALS['TL_DCA']['tl_table']['fields']['anything'] = array
(
	'label'          => &$GLOBALS['TL_LANG']['tl_table']['anything'],
	'exclude'	 => true,
	'inputType'	 => 'multiSelectWizard',
	'eval'		 => array
				   (
				   		'mandatory'=>true,
				   		'columnsData'=> array
						(
							'columns' => array
							(
								'key'	=> 'language',
								'label' => $GLOBALS['TL_LANG']['MSC']['mylanguagelabel'],
								'source' => $this->getLanguages(),
								'style' => 'width:200px'
							),
							array
							(
								'key'	=> 'secondcolumn',
								'label' => $GLOBALS['TL_LANG']['MSC']['secondcolumn'],
								'source' => array
								(
									'option1'	=> $GLOBALS['TL_LANG']['MSC']['option1'],
									'option2'	=> $GLOBALS['TL_LANG']['MSC']['option2'],
									'option3'	=> $GLOBALS['TL_LANG']['MSC']['option3']
								),
								'style' => 'width:100px'
							),
							array
							(
								'key'	=> 'columnwithforeignkey',
								'label' => $GLOBALS['TL_LANG']['MSC']['columnwithforeignkey'],
								'source' => 'tl_table.column'
							)
						)
					)
);

Providing data using the callback

$GLOBALS['TL_DCA']['tl_table']['fields']['anything'] = array
(
		'label'                 => &$GLOBALS['TL_LANG']['tl_table']['anything'],
		'exclude'		=> true,
		'inputType'		=> 'multiSelectWizard',
		'eval'			=> array('mandatory'=>true,'columnsCallback'=>array('Class', 'Method'))
 
);

Where obviously the return value of your method should be the same array as with the "columnsData" variant.

Javascript-Fallback

In case there is no Javascript, the modifications (add, delete etc.) will be executed manually. A lot of widgets execute database operations which is in 99.9% of all cases correct although there are exceptions such as the storage in the localconfig.php. The MultiSelectWizard supports both, storage in the localconfig.php and any routine that can be defined using a callback.

localconfig.php

'eval'	=> array('storeInLocalConfig'=>true)

Any routine

'eval'	=> array('storeCallback'=>array('MyClass','MyMethod'))

class MyClass extends Backend
{
   public function MyMethod($objWidget)
   {
   }
}

Helper methods

The extension also provides helper methods every developer can make use of.

getByKey

The easier method is using MultiSelectWizard::getByKey($strSerialized, $strKey). Just provide the serialized value from the database and the desired key of the column (in the example above e.g. "language") and you get an array of all values of this column.

$arrLanguages = MultiSelectWizard::getByKey($obj->myField, 'language');

getFilteredByKey (AND condition)

The rather more sophisticated method is MultiSelectWizard::getFilteredByKey($strSerialized, $strKey, $arrAnotherKey). The two first parameters are the same. You provide the serialized value and the key of the column you want the values of. Then there's a third parameter where you can filter your return values. Assuming you want to have all languages that use have the value "option2" in the column "secondcolumn" you can use this method as follows:

$arrLanguagesOption2 = MultiSelectWizard::getFilteredByKey($obj->myField, 'language', array('secondcolumn'=>'option2'));

You can use multiple filter conditions. Just extend the $arrAnotherkey accordingly. You will get only the data that matches all of the provided filter conditions!