Class yii\bootstrap\ButtonDropdown

All Classes | Properties | Methods

Inheritance	yii\bootstrap\ButtonDropdown » yii\bootstrap\Widget » yii\base\Widget
Uses Traits	yii\bootstrap\BootstrapWidgetTrait
Available since extension's version	2.0
Source Code	https://github.com/yiisoft/yii2-bootstrap/blob/master/src/ButtonDropdown.php

ButtonDropdown renders a group or split button dropdown bootstrap component.

For example,

// a button group using Dropdown widget echo ButtonDropdown::widget([ 'label' => 'Action', 'dropdown' => [ 'items' => [ ['label' => 'DropdownA', 'url' => '/'], ['label' => 'DropdownB', 'url' => '#'], ], ], ]);

Public Properties

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Property	Type	Description	Defined By
$clientEvents	array	The event handlers for the underlying Bootstrap JS plugin.	yii\bootstrap\BootstrapWidgetTrait
$clientOptions	array	The options for the underlying Bootstrap JS plugin.	yii\bootstrap\BootstrapWidgetTrait
$containerOptions	array	The HTML attributes for the container tag.	yii\bootstrap\ButtonDropdown
$dropdown	array	The configuration array for yii\bootstrap\Dropdown.	yii\bootstrap\ButtonDropdown
$dropdownClass	string	Name of a class to use for rendering dropdowns withing this widget.	yii\bootstrap\ButtonDropdown
$encodeLabel	boolean	Whether the label should be HTML-encoded.	yii\bootstrap\ButtonDropdown
$label	string	The button label	yii\bootstrap\ButtonDropdown
$options	array	The HTML attributes of the button.	yii\bootstrap\ButtonDropdown
$split	boolean	Whether to display a group of split-styled button group.	yii\bootstrap\ButtonDropdown
$tagName	string	The tag to use to render the button	yii\bootstrap\ButtonDropdown

Public Methods

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Method	Description	Defined By
getView()		yii\bootstrap\BootstrapWidgetTrait
init()	Initializes the widget.	yii\bootstrap\BootstrapWidgetTrait
run()	Renders the widget.	yii\bootstrap\ButtonDropdown

Protected Methods

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Method	Description	Defined By
registerClientEvents()	Registers JS event handlers that are listed in $clientEvents.	yii\bootstrap\BootstrapWidgetTrait
registerPlugin()	Registers a specific Bootstrap plugin and the related events	yii\bootstrap\BootstrapWidgetTrait
renderButton()	Generates the button dropdown.	yii\bootstrap\ButtonDropdown
renderDropdown()	Generates the dropdown menu.	yii\bootstrap\ButtonDropdown

Property Details

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$containerOptions public property (available since version 2.0.1)

The HTML attributes for the container tag. The following special options are recognized:

tag: string, defaults to "div", the name of the container tag.

See also \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.

public array $containerOptions = []

$dropdownClass public property (available since version 2.0.7)

Name of a class to use for rendering dropdowns withing this widget. Defaults to yii\bootstrap\Dropdown.

public string $dropdownClass = 'yii\bootstrap\Dropdown'

$encodeLabel public property

Whether the label should be HTML-encoded.

public boolean $encodeLabel = true

$label public property

The button label

public string $label = 'Button'

$options public property

The HTML attributes of the button.

See also \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.

public array $options = []

$split public property

Whether to display a group of split-styled button group.

public boolean $split = false

$tagName public property

The tag to use to render the button

public string $tagName = 'button'

Method Details

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getView() public abstract method

Defined in: yii\bootstrap\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

Defined in: yii\bootstrap\BootstrapWidgetTrait::init()

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(); if (!isset($this->options['id'])) { $this->options['id'] = $this->getId(); } }

registerClientEvents() protected method (available since version 2.0.2)

Defined in: yii\bootstrap\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\bootstrap\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(); }

renderButton() protected method

Generates the button dropdown.

protected string renderButton ( )
return	string	The rendering result.

Source code

 protected function renderButton() { Html::addCssClass($this->options, ['widget' => 'btn']); $label = $this->label; if ($this->encodeLabel) { $label = Html::encode($label); } if ($this->split) { $options = $this->options; $this->options['data-toggle'] = 'dropdown'; Html::addCssClass($this->options, ['toggle' => 'dropdown-toggle']); unset($options['id']); $splitButton = Button::widget([ 'label' => '<span class="caret"></span>', 'encodeLabel' => false, 'options' => $this->options, 'view' => $this->getView(), ]); } else { $label .= ' <span class="caret"></span>'; $options = $this->options; Html::addCssClass($options, ['toggle' => 'dropdown-toggle']); $options['data-toggle'] = 'dropdown'; $splitButton = ''; } if (isset($options['href'])) { if (is_array($options['href'])) { $options['href'] = Url::to($options['href']); } } else { if ($this->tagName === 'a') { $options['href'] = '#'; } } return Button::widget([ 'tagName' => $this->tagName, 'label' => $label, 'options' => $options, 'encodeLabel' => false, 'view' => $this->getView(), ]) . "\n" . $splitButton; }

renderDropdown() protected method

Generates the dropdown menu.

protected string renderDropdown ( )
return	string	The rendering result.

Source code

 protected function renderDropdown() { $config = $this->dropdown; $config['clientOptions'] = false; $config['view'] = $this->getView(); /** @var Widget $dropdownClass */ $dropdownClass = $this->dropdownClass; return $dropdownClass::widget($config); }

run() public method

Renders the widget.

public void run ( )

Source code

 public function run() { // @todo use [[options]] instead of [[containerOptions]] and introduce [[buttonOptions]] before 2.1 release Html::addCssClass($this->containerOptions, ['widget' => 'btn-group']); $options = $this->containerOptions; $tag = ArrayHelper::remove($options, 'tag', 'div'); $this->registerPlugin('dropdown'); return implode("\n", [ Html::beginTag($tag, $options), $this->renderButton(), $this->renderDropdown(), Html::endTag($tag) ]); }