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/**
* DropdownWidgets are not menus themselves, rather they contain a menu of options created with
* OO.ui.MenuOptionWidget. The DropdownWidget takes care of opening and displaying the menu so that
* users can interact with it.
*
* @example
* // Example: A DropdownWidget with a menu that contains three options
* var dropDown = new OO.ui.DropdownWidget( {
* label: 'Dropdown menu: Select a menu option',
* menu: {
* items: [
* new OO.ui.MenuOptionWidget( {
* data: 'a',
* label: 'First'
* } ),
* new OO.ui.MenuOptionWidget( {
* data: 'b',
* label: 'Second'
* } ),
* new OO.ui.MenuOptionWidget( {
* data: 'c',
* label: 'Third'
* } )
* ]
* }
* } );
*
* $( 'body' ).append( dropDown.$element );
*
* For more information, please see the [OOjs UI documentation on MediaWiki] [1].
*
* [1]: https://www.mediawiki.org/wiki/OOjs_UI/Widgets/Selects_and_Options#Menu_selects_and_options
*
* @class
* @extends OO.ui.Widget
* @mixins OO.ui.IconElement
* @mixins OO.ui.IndicatorElement
* @mixins OO.ui.LabelElement
* @mixins OO.ui.TitledElement
* @mixins OO.ui.TabIndexedElement
*
* @constructor
* @param {Object} [config] Configuration options
* @cfg {Object} [menu] Configuration options to pass to menu widget
*/
OO.ui.DropdownWidget = function OoUiDropdownWidget( config ) {
// Configuration initialization
config = $.extend( { indicator: 'down' }, config );
// Parent constructor
OO.ui.DropdownWidget.super.call( this, config );
// Properties (must be set before TabIndexedElement constructor call)
this.$handle = this.$( '<span>' );
// Mixin constructors
OO.ui.IconElement.call( this, config );
OO.ui.IndicatorElement.call( this, config );
OO.ui.LabelElement.call( this, config );
OO.ui.TitledElement.call( this, $.extend( {}, config, { $titled: this.$label } ) );
OO.ui.TabIndexedElement.call( this, $.extend( {}, config, { $tabIndexed: this.$handle } ) );
// Properties
this.menu = new OO.ui.MenuSelectWidget( $.extend( { widget: this }, config.menu ) );
// Events
this.$handle.on( {
click: this.onClick.bind( this ),
keypress: this.onKeyPress.bind( this )
} );
this.menu.connect( this, { select: 'onMenuSelect' } );
// Initialization
this.$handle
.addClass( 'oo-ui-dropdownWidget-handle' )
.append( this.$icon, this.$label, this.$indicator );
this.$element
.addClass( 'oo-ui-dropdownWidget' )
.append( this.$handle, this.menu.$element );
};
/* Setup */
OO.inheritClass( OO.ui.DropdownWidget, OO.ui.Widget );
OO.mixinClass( OO.ui.DropdownWidget, OO.ui.IconElement );
OO.mixinClass( OO.ui.DropdownWidget, OO.ui.IndicatorElement );
OO.mixinClass( OO.ui.DropdownWidget, OO.ui.LabelElement );
OO.mixinClass( OO.ui.DropdownWidget, OO.ui.TitledElement );
OO.mixinClass( OO.ui.DropdownWidget, OO.ui.TabIndexedElement );
/* Methods */
/**
* Get the menu.
*
* @return {OO.ui.MenuSelectWidget} Menu of widget
*/
OO.ui.DropdownWidget.prototype.getMenu = function () {
return this.menu;
};
/**
* Handles menu select events.
*
* @private
* @param {OO.ui.MenuOptionWidget} item Selected menu item
*/
OO.ui.DropdownWidget.prototype.onMenuSelect = function ( item ) {
var selectedLabel;
if ( !item ) {
return;
}
selectedLabel = item.getLabel();
// If the label is a DOM element, clone it, because setLabel will append() it
if ( selectedLabel instanceof jQuery ) {
selectedLabel = selectedLabel.clone();
}
this.setLabel( selectedLabel );
};
/**
* Handle mouse click events.
*
* @private
* @param {jQuery.Event} e Mouse click event
*/
OO.ui.DropdownWidget.prototype.onClick = function ( e ) {
if ( !this.isDisabled() && e.which === 1 ) {
this.menu.toggle();
}
return false;
};
/**
* Handle key press events.
*
* @private
* @param {jQuery.Event} e Key press event
*/
OO.ui.DropdownWidget.prototype.onKeyPress = function ( e ) {
if ( !this.isDisabled() && ( e.which === OO.ui.Keys.SPACE || e.which === OO.ui.Keys.ENTER ) ) {
this.menu.toggle();
return false;
}
};
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