# all files / src/tools/ PopupTool.js

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     /**
     * Popup tools open a popup window when they are selected from the {@link OO.ui.Toolbar toolbar}. Each popup tool is configured
     * with a static name, title, and icon, as well with as any popup configurations. Unlike other tools, popup tools do not require that developers specify
     * an #onSelect or #onUpdateState method, as these methods have been implemented already.
     *
     *     // Example of a popup tool. When selected, a popup tool displays
     *     // a popup window.
     *     function HelpTool( toolGroup, config ) {
     *        OO.ui.PopupTool.call( this, toolGroup, $.extend( { popup: {
     *            padded: true,
     *            label: 'Help',
     *            head: true
     *        } }, config ) );
     *        this.popup.$body.append( '<p>I am helpful!</p>' );
     *     };
     *     OO.inheritClass( HelpTool, OO.ui.PopupTool );
     *     HelpTool.static.name = 'help';
     *     HelpTool.static.icon = 'help';
     *     HelpTool.static.title = 'Help';
     *     toolFactory.register( HelpTool );
     *
     * For an example of a toolbar that contains a popup tool, see {@link OO.ui.Toolbar toolbars}. For more information about
     * toolbars in general, please see the [OOUI documentation on MediaWiki][1].
     *
     * [1]: https://www.mediawiki.org/wiki/OOUI/Toolbars
     *
     * @abstract
     * @class
     * @extends OO.ui.Tool
     * @mixins OO.ui.mixin.PopupElement
     *
     * @constructor
     * @param {OO.ui.ToolGroup} toolGroup
     * @param {Object} [config] Configuration options
     */
    OO.ui.PopupTool = function OoUiPopupTool( toolGroup, config ) {
    	// Allow passing positional parameters inside the config object
    	if ( OO.isPlainObject( toolGroup ) && config === undefined ) {
    		config = toolGroup;
    		toolGroup = config.toolGroup;
    	}

    	// Parent constructor
    	OO.ui.PopupTool.parent.call( this, toolGroup, config );

    	// Mixin constructors
    	OO.ui.mixin.PopupElement.call( this, config );

    	// Events
    	this.popup.connect( this, { toggle: 'onPopupToggle' } );

    	// Initialization
    	this.popup.setPosition( toolGroup.getToolbar().position === 'bottom' ? 'above' : 'below' );
    	this.$element.addClass( 'oo-ui-popupTool' );
    	this.popup.$element.addClass( 'oo-ui-popupTool-popup' );
    	this.toolbar.$popups.append( this.popup.$element );
    };

    /* Setup */

    OO.inheritClass( OO.ui.PopupTool, OO.ui.Tool );
    OO.mixinClass( OO.ui.PopupTool, OO.ui.mixin.PopupElement );

    /* Methods */

    /**
     * Handle the tool being selected.
     *
     * @inheritdoc
     */
    OO.ui.PopupTool.prototype.onSelect = function () {
    	if ( !this.isDisabled() ) {
    		this.popup.toggle();
    	}
    	return false;
    };

    /**
     * Handle the toolbar state being updated.
     *
     * @inheritdoc
     */
    OO.ui.PopupTool.prototype.onUpdateState = function () {
    };

    /**
     * Handle popup visibility being toggled.
     *
     * @param {boolean} isVisible
     */
    OO.ui.PopupTool.prototype.onPopupToggle = function ( isVisible ) {
    	this.setActive( isVisible );
    	this.toolGroup.emit( 'active', isVisible );
    };