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/**
* @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/**
* @module ui/dropdown/button/dropdownbuttonview
*/
import ButtonView from '../../button/buttonview';
import dropdownArrowIcon from '../../../theme/icons/dropdown-arrow.svg';
import IconView from '../../icon/iconview';
/**
* The default dropdown button view class.
*
* const view = new DropdownButtonView();
*
* view.set( {
* label: 'A button',
* keystroke: 'Ctrl+B',
* tooltip: true
* } );
*
* view.render();
*
* document.body.append( view.element );
*
* Also see the {@link module:ui/dropdown/utils~createDropdown `createDropdown()` util}.
*
* @implements module:ui/dropdown/button/dropdownbutton~DropdownButton
* @extends module:ui/button/buttonview~ButtonView
*/
export default class DropdownButtonView extends ButtonView {
/**
* @inheritDoc
*/
constructor( locale ) {
super( locale );
/**
* An icon that displays arrow to indicate a dropdown button.
*
* @readonly
* @member {module:ui/icon/iconview~IconView}
*/
this.arrowView = this._createArrowView();
this.extendTemplate( {
attributes: {
'aria-haspopup': true
}
} );
// The DropdownButton interface expects the open event upon which will open the dropdown.
this.delegate( 'execute' ).to( this, 'open' );
}
/**
* @inheritDoc
*/
render() {
super.render();
this.children.add( this.arrowView );
}
/**
* Creates a {@link module:ui/icon/iconview~IconView} instance as {@link #arrowView}.
*
* @private
* @returns {module:ui/icon/iconview~IconView}
*/
_createArrowView() {
const arrowView = new IconView();
arrowView.content = dropdownArrowIcon;
arrowView.extendTemplate( {
attributes: {
class: 'ck-dropdown__arrow'
}
} );
return arrowView;
}
}