Class yii\bootstrap\Dropdown

Inheritanceyii\bootstrap\Dropdown » yii\bootstrap\Widget » yii\base\Widget » yii\base\Component » yii\base\BaseObject
Implementsyii\base\Configurable, yii\base\ViewContextInterface
Uses Traitsyii\bootstrap\BootstrapWidgetTrait
Available since version2.0
Source Code https://github.com/yiisoft/yii2-bootstrap/blob/master/Dropdown.php

Dropdown renders a Bootstrap dropdown menu component.

For example,

<div class="dropdown">
    <a href="#" data-toggle="dropdown" class="dropdown-toggle">Label <b class="caret"></b></a>
    <?php
        echo Dropdown::widget([
            'items' => [
                ['label' => 'DropdownA', 'url' => '/'],
                ['label' => 'DropdownB', 'url' => '#'],
            ],
        ]);
    ?>
</div>

See also http://getbootstrap.com/javascript/#dropdowns.

Public Properties

Hide inherited properties

PropertyTypeDescriptionDefined By
$autoIdPrefix string The prefix to the automatically generated widget IDs. yii\base\Widget
$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
$counter integer A counter used to generate \yii\base\id for widgets. yii\base\Widget
$encodeLabels boolean Whether the labels for header items should be HTML-encoded. yii\bootstrap\Dropdown
$items array List of menu items in the dropdown. yii\bootstrap\Dropdown
$options array The HTML attributes for the widget container tag. yii\bootstrap\Widget
$stack yii\base\Widget[] The widgets that are currently being rendered (not ended). yii\base\Widget
$submenuOptions array|null The HTML attributes for sub-menu container tags. yii\bootstrap\Dropdown

Public Methods

Hide inherited methods

MethodDescriptionDefined By
__call() Calls the named method which is not a class method. yii\base\BaseObject
__clone() This method is called after the object is created by cloning an existing one. yii\base\Component
__construct() Constructor. yii\base\BaseObject
__get() Returns the value of an object property. yii\base\BaseObject
__isset() Checks if a property is set, i.e. defined and not null. yii\base\BaseObject
__set() Sets value of an object property. yii\base\BaseObject
__unset() Sets an object property to null. yii\base\BaseObject
afterRun() This method is invoked right after a widget is executed. yii\base\Widget
attachBehavior() Attaches a behavior to this component. yii\base\Component
attachBehaviors() Attaches a list of behaviors to the component. yii\base\Component
beforeRun() This method is invoked right before the widget is executed. yii\base\Widget
begin() Begins a widget. yii\base\Widget
behaviors() Returns a list of behaviors that this component should behave as. yii\base\Component
canGetProperty() Returns a value indicating whether a property can be read. yii\base\BaseObject
canSetProperty() Returns a value indicating whether a property can be set. yii\base\BaseObject
className() Returns the fully qualified name of this class. yii\base\BaseObject
detachBehavior() Detaches a behavior from the component. yii\base\Component
detachBehaviors() Detaches all behaviors from the component. yii\base\Component
end() Ends a widget. yii\base\Widget
ensureBehaviors() Makes sure that the behaviors declared in behaviors() are attached to this component. yii\base\Component
getBehavior() Returns the named behavior object. yii\base\Component
getBehaviors() Returns all behaviors attached to this component. yii\base\Component
getId() Returns the ID of the widget. yii\base\Widget
getView() yii\bootstrap\BootstrapWidgetTrait
getViewPath() Returns the directory containing the view files for this widget. yii\base\Widget
hasEventHandlers() Returns a value indicating whether there is any handler attached to the named event. yii\base\Component
hasMethod() Returns a value indicating whether a method is defined. yii\base\BaseObject
hasProperty() Returns a value indicating whether a property is defined. yii\base\BaseObject
init() Initializes the widget. yii\bootstrap\Dropdown
off() Detaches an existing event handler from this component. yii\base\Component
on() Attaches an event handler to an event. yii\base\Component
render() Renders a view. yii\base\Widget
renderFile() Renders a view file. yii\base\Widget
run() Renders the widget. yii\bootstrap\Dropdown
setId() Sets the ID of the widget. yii\base\Widget
setView() Sets the view object to be used by this widget. yii\base\Widget
trigger() Triggers an event. yii\base\Component
widget() Creates a widget instance and runs it. yii\base\Widget

Protected Methods

Hide inherited methods

MethodDescriptionDefined 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
renderItems() Renders menu items. yii\bootstrap\Dropdown

Events

Hide inherited events

EventTypeDescriptionDefined By
EVENT_AFTER_RUN yii\base\WidgetEvent An event raised right after executing a widget. (available since version 2.0.11) yii\base\Widget
EVENT_BEFORE_RUN yii\base\WidgetEvent An event raised right before executing a widget. (available since version 2.0.11) yii\base\Widget
EVENT_INIT yii\base\Event An event that is triggered when the widget is initialized via init(). (available since version 2.0.11) yii\base\Widget

Property Details

$encodeLabels public property

Whether the labels for header items should be HTML-encoded.

public boolean $encodeLabels true
$items public property

List of menu items in the dropdown. Each array element can be either an HTML string, or an array representing a single menu with the following structure:

  • label: string, required, the label of the item link.
  • encode: boolean, optional, whether to HTML-encode item label.
  • url: string|array, optional, the URL of the item link. This will be processed by yii\helpers\Url::to(). If not set, the item will be treated as a menu header when the item has no sub-menu.
  • visible: boolean, optional, whether this menu item is visible. Defaults to true.
  • linkOptions: array, optional, the HTML attributes of the item link.
  • options: array, optional, the HTML attributes of the item.
  • items: array, optional, the submenu items. The structure is the same as this property. Note that Bootstrap doesn't support dropdown submenu. You have to add your own CSS styles to support it.
  • submenuOptions: array, optional, the HTML attributes for sub-menu container tag. If specified it will be merged with $submenuOptions.

To insert divider use <li role="presentation" class="divider"></li>.

public array $items = []
$submenuOptions public property (available since version 2.0.5)

The HTML attributes for sub-menu container tags. If not set - $options value will be used for it.

public array|null $submenuOptions null

Method Details

init() public method

Initializes the widget.

If you override this method, make sure you call the parent implementation first.

public void init ( )
renderItems() protected method

Renders menu items.

protected string renderItems ( $items, $options = [] )
$items array

The menu items to be rendered

$options array

The container HTML attributes

return string

The rendering result.

throws yii\base\InvalidConfigException

if the label option is not specified in one of the items.

run() public method

Renders the widget.

public void run ( )