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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\bootstrap;
use Yii;
use yii\base\InvalidConfigException;
/**
* A Bootstrap 3 enhanced version of [[\yii\widgets\ActiveForm]].
*
* This class mainly adds the [[layout]] property to choose a Bootstrap 3 form layout.
* So for example to render a horizontal form you would:
*
* ```php
* use yii\bootstrap\ActiveForm;
*
* $form = ActiveForm::begin(['layout' => 'horizontal'])
* ```
*
* This will set default values for the [[ActiveField]]
* to render horizontal form fields. In particular the [[ActiveField::template|template]]
* is set to `{label} {beginWrapper} {input} {error} {endWrapper} {hint}` and the
* [[ActiveField::horizontalCssClasses|horizontalCssClasses]] are set to:
*
* ```php
* [
* 'offset' => 'col-sm-offset-3',
* 'label' => 'col-sm-3',
* 'wrapper' => 'col-sm-6',
* 'error' => '',
* 'hint' => 'col-sm-3',
* ]
* ```
*
* To get a different column layout in horizontal mode you can modify those options
* through [[fieldConfig]]:
*
* ```php
* $form = ActiveForm::begin([
* 'layout' => 'horizontal',
* 'fieldConfig' => [
* 'template' => "{label}\n{beginWrapper}\n{input}\n{hint}\n{error}\n{endWrapper}",
* 'horizontalCssClasses' => [
* 'label' => 'col-sm-4',
* 'offset' => 'col-sm-offset-4',
* 'wrapper' => 'col-sm-8',
* 'error' => '',
* 'hint' => '',
* ],
* ],
* ]);
* ```
*
* @see ActiveField for details on the [[fieldConfig]] options
* @see http://getbootstrap.com/css/#forms
*
* @author Michael Härtl <haertl.mike@gmail.com>
* @since 2.0
*/
class ActiveForm extends \yii\widgets\ActiveForm
{
/**
* @var string the default field class name when calling [[field()]] to create a new field.
* @see fieldConfig
*/
public $fieldClass = 'yii\bootstrap\ActiveField';
/**
* @var array HTML attributes for the form tag. Default is `[]`.
*/
public $options = [];
/**
* @var string the form layout. Either 'default', 'horizontal' or 'inline'.
* By choosing a layout, an appropriate default field configuration is applied. This will
* render the form fields with slightly different markup for each layout. You can
* override these defaults through [[fieldConfig]].
* @see \yii\bootstrap\ActiveField for details on Bootstrap 3 field configuration
*/
public $layout = 'default';
/**
* {@inheritdoc}
*/
public function init()
{
if (!in_array($this->layout, ['default', 'horizontal', 'inline'])) {
throw new InvalidConfigException('Invalid layout type: ' . $this->layout);
}
if ($this->layout !== 'default') {
Html::addCssClass($this->options, 'form-' . $this->layout);
}
parent::init();
}
/**
* {@inheritdoc}
* @return ActiveField the created ActiveField object
*/
public function field($model, $attribute, $options = [])
{
return parent::field($model, $attribute, $options);
}
}