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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\jui;
use yii\helpers\Json;
/**
* \yii\jui\Widget is the base class for all jQuery UI widgets.
*
* @author Alexander Kochetov <creocoder@gmail.com>
* @since 2.0
*/
class Widget extends \yii\base\Widget
{
/**
* @var array the HTML attributes for the widget container tag.
* @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
*/
public $options = [];
/**
* @var array the options for the underlying jQuery UI widget.
* Please refer to the corresponding jQuery UI widget Web page for possible options.
* For example, [this page](http://api.jqueryui.com/accordion/) shows
* how to use the "Accordion" widget and the supported options (e.g. "header").
*/
public $clientOptions = [];
/**
* @var array the event handlers for the underlying jQuery UI widget.
* Please refer to the corresponding jQuery UI widget Web page for possible events.
* For example, [this page](http://api.jqueryui.com/accordion/) shows
* how to use the "Accordion" widget and the supported events (e.g. "create").
* Keys are the event names and values are javascript code that is passed to the `.on()` function
* as the event handler.
*
* For example you could write the following in your widget configuration:
*
* ```php
* 'clientEvents' => [
* 'change' => 'function () { alert('event "change" occured.'); }'
* ],
* ```
*/
public $clientEvents = [];
/**
* @var array event names mapped to what should be specified in `.on()`.
* If empty, it is assumed that event passed to clientEvents is prefixed with widget name.
*/
protected $clientEventMap = [];
/**
* Initializes the widget.
* If you override this method, make sure you call the parent implementation first.
*/
public function init()
{
parent::init();
if (!isset($this->options['id'])) {
$this->options['id'] = $this->getId();
}
}
/**
* Registers a specific jQuery UI widget options
* @param string $name the name of the jQuery UI widget
* @param string $id the ID of the widget
*/
protected function registerClientOptions($name, $id)
{
if ($this->clientOptions !== false) {
$options = empty($this->clientOptions) ? '' : Json::htmlEncode($this->clientOptions);
$js = "jQuery('#$id').$name($options);";
$this->getView()->registerJs($js);
}
}
/**
* Registers a specific jQuery UI widget events
* @param string $name the name of the jQuery UI widget
* @param string $id the ID of the widget
*/
protected function registerClientEvents($name, $id)
{
if (!empty($this->clientEvents)) {
$js = [];
foreach ($this->clientEvents as $event => $handler) {
if (isset($this->clientEventMap[$event])) {
$eventName = $this->clientEventMap[$event];
} else {
$eventName = strtolower($name . $event);
}
$js[] = "jQuery('#$id').on('$eventName', $handler);";
}
$this->getView()->registerJs(implode("\n", $js));
}
}
/**
* Registers a specific jQuery UI widget asset bundle, initializes it with client options and registers related events
* @param string $name the name of the jQuery UI widget
* @param string $id the ID of the widget. If null, it will use the `id` value of [[options]].
*/
protected function registerWidget($name, $id = null)
{
if ($id === null) {
$id = $this->options['id'];
}
JuiAsset::register($this->getView());
$this->registerClientEvents($name, $id);
$this->registerClientOptions($name, $id);
}
}