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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\helpers\ArrayHelper;
/**
* ButtonGroup renders a button group bootstrap component.
*
* For example,
*
* ```php
* // a button group with items configuration
* echo ButtonGroup::widget([
* 'buttons' => [
* ['label' => 'A'],
* ['label' => 'B'],
* ['label' => 'C', 'visible' => false],
* ]
* ]);
*
* // button group with an item as a string
* echo ButtonGroup::widget([
* 'buttons' => [
* Button::widget(['label' => 'A']),
* ['label' => 'B'],
* ]
* ]);
* ```
*
* Pressing on the button should be handled via JavaScript. See the following for details:
*
* @see http://getbootstrap.com/javascript/#buttons
* @see http://getbootstrap.com/components/#btn-groups
*
* @author Antonio Ramirez <amigo.cobos@gmail.com>
* @since 2.0
*/
class ButtonGroup extends Widget
{
/**
* @var array list of buttons. Each array element represents a single button
* which can be specified as a string or an array of the following structure:
*
* - label: string, required, the button label.
* - options: array, optional, the HTML attributes of the button.
* - visible: bool, optional, whether this button is visible. Defaults to true.
*/
public $buttons = [];
/**
* @var bool whether to HTML-encode the button labels.
*/
public $encodeLabels = true;
/**
* Initializes the widget.
* If you override this method, make sure you call the parent implementation first.
*/
public function init()
{
parent::init();
Html::addCssClass($this->options, ['widget' => 'btn-group']);
}
/**
* Renders the widget.
*/
public function run()
{
BootstrapAsset::register($this->getView());
return Html::tag('div', $this->renderButtons(), $this->options);
}
/**
* Generates the buttons that compound the group as specified on [[buttons]].
* @return string the rendering result.
*/
protected function renderButtons()
{
$buttons = [];
foreach ($this->buttons as $button) {
if (is_array($button)) {
$visible = ArrayHelper::remove($button, 'visible', true);
if ($visible === false) {
continue;
}
$button['view'] = $this->getView();
if (!isset($button['encodeLabel'])) {
$button['encodeLabel'] = $this->encodeLabels;
}
$buttons[] = Button::widget($button);
} else {
$buttons[] = $button;
}
}
return implode("\n", $buttons);
}
}