Class yii\bootstrap4\ButtonGroup

All Classes | Properties | Methods

Inheritance	yii\bootstrap4\ButtonGroup » yii\bootstrap4\Widget » yii\base\Widget
Uses Traits	yii\bootstrap4\BootstrapWidgetTrait
Source Code	https://github.com/yiisoft/yii2-bootstrap4/blob/master/src/ButtonGroup.php

ButtonGroup renders a button group bootstrap component.

For example,

// 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:

Public Properties

Hide inherited properties

Property	Type	Description	Defined By
$buttons	array	List of buttons.	yii\bootstrap4\ButtonGroup
$clientEvents	array	The event handlers for the underlying Bootstrap JS plugin.	yii\bootstrap4\BootstrapWidgetTrait
$clientOptions	array	The options for the underlying Bootstrap JS plugin.	yii\bootstrap4\BootstrapWidgetTrait
$encodeLabels	boolean	Whether to HTML-encode the button labels.	yii\bootstrap4\ButtonGroup
$options	array	The HTML attributes for the widget container tag.	yii\bootstrap4\Widget

Public Methods

Hide inherited methods

Method	Description	Defined By
getView()		yii\bootstrap4\BootstrapWidgetTrait
init()	Initializes the widget.	yii\bootstrap4\ButtonGroup
run()		yii\bootstrap4\ButtonGroup

Protected Methods

Hide inherited methods

Method	Description	Defined By
registerClientEvents()	Registers JS event handlers that are listed in $clientEvents.	yii\bootstrap4\BootstrapWidgetTrait
registerPlugin()	Registers a specific Bootstrap plugin and the related events	yii\bootstrap4\BootstrapWidgetTrait
renderButtons()	Generates the buttons that compound the group as specified on $buttons.	yii\bootstrap4\ButtonGroup

Property Details

Hide inherited properties

$buttons public property

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 array $buttons = []

$encodeLabels public property

Whether to HTML-encode the button labels.

public boolean $encodeLabels = true

Method Details

Hide inherited methods

getView() public abstract method

Defined in: yii\bootstrap4\BootstrapWidgetTrait::getView()

See also \yii\base\Widget::getView().

public abstract \yii\web\View getView ( )
return	\yii\web\View	The view object that can be used to render views or view files.

Source code

                abstract function getView();

init() public method

Initializes the widget.

This method will register the bootstrap asset bundle. If you override this method, make sure you call the parent implementation first.

public void init ( )

Source code

                public function init()
{
    parent::init();
    Html::addCssClass($this->options, ['widget' => 'btn-group']);
    if (!isset($this->options['role'])) {
        $this->options['role'] = 'group';
    }
}

registerClientEvents() protected method

Defined in: yii\bootstrap4\BootstrapWidgetTrait::registerClientEvents()

Registers JS event handlers that are listed in $clientEvents.

protected void registerClientEvents ( )

Source code

                protected function registerClientEvents()
{
    if (!empty($this->clientEvents)) {
        $id = $this->options['id'];
        $js = [];
        foreach ($this->clientEvents as $event => $handler) {
            $js[] = "jQuery('#$id').on('$event', $handler);";
        }
        $this->getView()->registerJs(implode("\n", $js));
    }
}

registerPlugin() protected method

Defined in: yii\bootstrap4\BootstrapWidgetTrait::registerPlugin()

Registers a specific Bootstrap plugin and the related events

protected void registerPlugin ( $name )
$name	string	The name of the Bootstrap plugin

Source code

                protected function registerPlugin($name)
{
    $view = $this->getView();
    BootstrapPluginAsset::register($view);
    $id = $this->options['id'];
    if ($this->clientOptions !== false) {
        $options = empty($this->clientOptions) ? '' : Json::htmlEncode($this->clientOptions);
        $js = "jQuery('#$id').$name($options);";
        $view->registerJs($js);
    }
    $this->registerClientEvents();
}

renderButtons() protected method

Generates the buttons that compound the group as specified on $buttons.

protected string renderButtons ( )
return	string	The rendering result.
throws	Exception

Source code

                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'] = $this->encodeLabels;
            }
            if (!isset($button['options'], $button['options']['type'])) {
                ArrayHelper::setValue($button, 'options.type', 'button');
            }
            $buttons[] = Button::widget($button);
        } else {
            $buttons[] = $button;
        }
    }
    return implode("\n", $buttons);
}

run() public method

public void run ( )
throws	Exception

Source code

                public function run()
{
    BootstrapAsset::register($this->getView());
    return Html::tag('div', $this->renderButtons(), $this->options);
}