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<?php
/**
* @copyright Copyright © Kartik Visweswaran, Krajee.com, 2014 - 2019
* @package yii2-widgets
* @subpackage yii2-widget-depdrop
* @version 1.0.6
*/
namespace kartik\depdrop;
use kartik\base\InputWidget;
use kartik\base\Config;
use kartik\select2\Select2;
use yii\helpers\ArrayHelper;
use yii\base\InvalidConfigException;
/**
* Dependent Dropdown widget is a wrapper widget for the dependent-dropdown
* JQuery plugin by Krajee. The plugin enables setting up dependent dropdowns
* with nested dependencies.
*
* @see http://demos.krajee.com/widget-details/depdrop
* @see http://plugins.krajee.com/dependent-dropdown
* @see http://github.com/kartik-v/dependent-dropdown
* @author Kartik Visweswaran <kartikv2@gmail.com>
* @since 1.0.6
*/
class DepDrop extends InputWidget
{
/**
* @var string the default native select input dropdown style
*/
const TYPE_DEFAULT = 1;
/**
* @var string the enhanced Select2 widget dropdown style
*/
const TYPE_SELECT2 = 2;
/**
* @var int the type of the dropdown element. Defaults to `1`. Can be one of the following:
*
* - 1 or [[DepDrop::TYPE_DEFAULT]] will render using \yii\helpers\Html::dropDownList
* - 2 or [[DepDrop::TYPE_SELECT2]] will render using \kartik\widgets\Select2 widget
*/
public $type = self::TYPE_DEFAULT;
/**
* @var array the configuration options for the Select2 widget. Applicable only if the `type` property is set to
* [[DepDrop::TYPE_SELECT2]].
*/
public $select2Options = [];
/**
* @inheritdoc
*/
public $pluginName = 'depdrop';
/**
* Runs the widget
*
* @throws InvalidConfigException
*/
public function run()
{
if (empty($this->pluginOptions['url'])) {
throw new InvalidConfigException("The 'pluginOptions[\"url\"]' property has not been set.");
}
if (empty($this->pluginOptions['depends']) || !is_array($this->pluginOptions['depends'])) {
throw new InvalidConfigException("The 'pluginOptions[\"depends\"]' property must be set and must be an array of dependent dropdown element identifiers.");
}
if (empty($this->options['class'])) {
$this->options['class'] = 'form-control';
}
if ($this->type === self::TYPE_SELECT2) {
Config::checkDependency('select2\Select2', 'yii2-widget-select2', 'for dependent dropdown for Select2');
}
if ($this->type !== self::TYPE_SELECT2 && !empty($this->options['placeholder'])) {
$this->data = ['' => $this->options['placeholder']] + $this->data;
}
$this->registerAssets();
}
/**
* Registers the needed assets
*/
public function registerAssets()
{
$view = $this->getView();
DepDropAsset::register($view)->addLanguage($this->language, 'depdrop_locale_');
DepDropExtAsset::register($view);
$this->registerPlugin($this->pluginName);
if ($this->type === self::TYPE_SELECT2) {
$loading = ArrayHelper::getValue($this->pluginOptions, 'loadingText', 'Loading ...');
$this->select2Options['data'] = $this->data;
$this->select2Options['options'] = $this->options;
if ($this->hasModel()) {
$settings = ArrayHelper::merge($this->select2Options, [
'model' => $this->model,
'attribute' => $this->attribute
]);
} else {
$settings = ArrayHelper::merge($this->select2Options, [
'name' => $this->name,
'value' => $this->value
]);
}
echo Select2::widget($settings);
$id = $this->options['id'];
$view->registerJs("initDepdropS2('{$id}','{$loading}');");
} else {
echo $this->getInput('dropdownList', true);
}
}
}