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432 lines
10 KiB
JavaScript
432 lines
10 KiB
JavaScript
/*!
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* jQuery UI Selectmenu @VERSION
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*
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* Copyright 2012, AUTHORS.txt (http://jqueryui.com/about)
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* Dual licensed under the MIT or GPL Version 2 licenses.
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* http://jquery.org/license
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*
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* http://docs.jquery.com/UI/Selectmenu
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*
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* Depends:
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* jquery.ui.core.js
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* jquery.ui.widget.js
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* jquery.ui.position.js
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* jquery.ui.menu.js
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*/
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(function( $, undefined ) {
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$.widget( "ui.selectmenu", {
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version: "@VERSION",
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defaultElement: "<select>",
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options: {
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dropdown: true,
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appendTo: "body",
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position: {
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my: "left top",
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at: "left bottom",
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collision: "none"
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},
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// callbacks
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open: null,
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focus: null,
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select: null,
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close: null,
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change: null
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},
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_create: function() {
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// make / set unique id
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var selectmenuId = this.element.uniqueId().attr( 'id' );
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// array of button and menu id's
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this.ids = { id: selectmenuId, button: selectmenuId + '-button', menu: selectmenuId + '-menu' };
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// catch click event of the label
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this._on({
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'click': function( event ) {
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this.button.focus();
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event.preventDefault();
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}
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});
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this._drawButton();
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this._on( this.button, this._buttonEvents );
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this._hoverable( this.button );
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this._focusable( this.button );
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this._drawMenu();
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// document click closes menu
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this._on( document, {
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click: function( event ) {
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if ( this.isOpen && !$( event.target ).closest( "li.ui-state-disabled, li.ui-selectmenu-optgroup, #" + this.ids.button ).length ) {
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this.close( event );
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}
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}
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});
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if ( this.options.disabled ) {
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this.disable();
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}
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},
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_drawButton: function() {
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var tabindex = this.element.attr( 'tabindex' );
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// hide original select tag
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this.element.hide();
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// create button
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this.button = $( '<a />', {
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'class': 'ui-button ui-widget ui-state-default ui-corner-all',
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href: '#' + this.ids.id,
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tabindex: ( tabindex ? tabindex : this.options.disabled ? -1 : 0 ),
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id: this.ids.button,
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width: this.element.outerWidth(),
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role: 'combobox',
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'aria-expanded': false,
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'aria-autocomplete': 'list',
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'aria-owns': this.ids.menu,
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'aria-haspopup': true
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});
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this.button.prepend( $( '<span class="ui-icon ' + ( this.options.dropdown ? 'ui-icon-triangle-1-s' : 'ui-icon-triangle-2-n-s' ) + '"/>' ) );
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this.buttonText = $( '<span />', {
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'class': 'ui-selectmenu-text' ,
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html: this.element.find( "option:selected" ).text() || ' '
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})
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.appendTo( this.button );
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// wrap and insert new button
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this.buttonWrap = $( '<span />', {
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'class': 'ui-selectmenu-button'
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})
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.append( this.button )
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.insertAfter( this.element );
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},
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_drawMenu: function() {
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var that = this;
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// create menu portion, append to body
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this.menu = $( '<ul />', {
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'aria-hidden': true,
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'aria-labelledby': this.ids.button,
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id: this.ids.menu
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});
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// wrap menu
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this.menuWrap = $( '<div />', {
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'class': 'ui-selectmenu-menu',
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width: ( this.options.dropdown ) ? this.button.outerWidth() : this.buttonText.width() + parseFloat( this.buttonText.css( "padding-left" ) ) || 0 + parseFloat( this.buttonText.css( "margin-left" ) ) || 0
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})
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.append( this.menu )
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.appendTo( this.options.appendTo );
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// init menu widget
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this.menu.menu({
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select: function( event, ui ) {
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var item = ui.item.data( "item.selectmenu" );
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that._select( item, event );
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if ( that.isOpen ) {
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event.preventDefault();
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that.close( event );
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}
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},
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focus: function( event, ui ) {
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var item = ui.item.data( "item.selectmenu" );
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if ( that.focus !== undefined ) {
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if ( item.index !== that.focus ) {
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that._trigger( "focus", event, { item: item } );
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if ( !that.isOpen ) {
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that._select( item, event );
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}
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}
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}
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that.focus = item.index;
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},
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// set ARIA role
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role: 'listbox'
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});
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// change menu styles?
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if ( this.options.dropdown ) {
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this.menu.addClass( 'ui-corner-bottom' ).removeClass( 'ui-corner-all' );
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}
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// unbind uneeded Menu events
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this.menu.off( "mouseleave.menu" );
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$( document ).off( "click.menu" );
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},
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refresh: function() {
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this.menu.empty();
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var item,
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options = this.element.find( 'option' );
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if ( options.length ) {
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this._readOptions( options );
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this._renderMenu( this.menu, this.items );
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this.menu.menu( "refresh" );
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this.menuItems = this.menu.find( "li" ).not( '.ui-selectmenu-optgroup' );
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// select current item
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item = this._getSelectedItem();
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this.menu.menu( "focus", null, item );
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this._setSelected( item.data( "item.selectmenu" ) );
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// set disabled state
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this._setOption( "disabled", this._getCreateOptions().disabled );
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}
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},
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open: function( event ) {
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if ( !this.options.disabled ) {
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// make sure menu is refreshed on first init (needed at least for IE9)
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if ( this.isOpen === undefined ) {
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this.button.trigger( "focus" );
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}
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this.isOpen = true;
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this._toggleAttr();
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if ( this.items && !this.options.dropdown ) {
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var currentItem = this._getSelectedItem();
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// center current item
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if ( this.menu.outerHeight() < this.menu.prop( "scrollHeight" ) ) {
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this.menuWrap.css( "left" , -10000 );
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this.menu.scrollTop( this.menu.scrollTop() + currentItem.position().top - this.menu.outerHeight() / 2 + currentItem.outerHeight() / 2 );
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this.menuWrap.css( "left" , "auto" );
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}
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$.extend( this.options.position, {
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my: "left top",
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at: "left top",
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// calculate offset
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offset: "0 " + ( this.menu.offset().top - currentItem.offset().top + ( this.button.outerHeight() - currentItem.outerHeight() ) / 2 )
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});
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}
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this.options.position.of = this.button;
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this.menuWrap
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.zIndex( this.element.zIndex() + 1 )
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.position( this.options.position );
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this._trigger( "open", event );
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}
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},
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close: function( event ) {
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if ( this.isOpen ) {
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this.isOpen = false;
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this._toggleAttr();
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this._trigger( "close", event );
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}
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},
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widget: function() {
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return this.button;
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},
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menuWidget: function() {
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return this.menu;
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},
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_renderMenu: function( ul, items ) {
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var that = this,
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currentOptgroup = "";
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$.each( items, function( index, item ) {
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if ( item.optgroup !== currentOptgroup ) {
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$( '<li />', {
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'class': 'ui-selectmenu-optgroup' + ( item.element.parent( "optgroup" ).attr( "disabled" ) ? ' ui-state-disabled' : '' ),
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html: item.optgroup
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}).appendTo( ul );
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currentOptgroup = item.optgroup;
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}
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that._renderItem( ul, item );
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});
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},
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_renderItem: function( ul, item) {
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var li = $( "<li />" ).data( "item.selectmenu", item );
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if ( item.disabled ) {
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li.addClass( 'ui-state-disabled' );
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}
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li.append( $( "<a />", {
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html: item.label,
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href: '#'
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})
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);
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return li.appendTo( ul );
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},
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_move: function( direction, event ) {
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if ( direction === "first" || direction === "last" ) {
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// set focus manually for first or last item
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this.menu.menu( "focus", event, this.menuItems[ direction ]() );
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} else {
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// move to and focus next or prev item
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this.menu.menu( direction, event );
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}
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},
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_getSelectedItem: function() {
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return this.menuItems.eq( this.element[ 0 ].selectedIndex );
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},
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_toggle: function( event ) {
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if ( this.isOpen ) {
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this.close( event );
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} else {
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this.open( event );
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}
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},
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_buttonEvents: {
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focus: function( event ) {
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// init Menu on first focus
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this.refresh();
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this.button.off( "focus." + this.widgetName );
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},
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click: function( event ) {
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this._toggle( event );
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event.preventDefault();
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},
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keydown: function( event ) {
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var prevDef = true;
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switch ( event.keyCode ) {
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case $.ui.keyCode.TAB:
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case $.ui.keyCode.ESCAPE:
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if ( this.isOpen ) {
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this.close( event );
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}
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prevDef = false;
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break;
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case $.ui.keyCode.ENTER:
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if ( this.isOpen ) {
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this.menu.menu( "select", event );
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}
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break;
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case $.ui.keyCode.UP:
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if ( event.altKey ) {
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this._toggle( event );
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} else {
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this._move( "previous", event );
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}
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break;
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case $.ui.keyCode.DOWN:
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if ( event.altKey ) {
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this._toggle( event );
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} else {
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this._move( "next", event );
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}
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break;
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case $.ui.keyCode.LEFT:
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this._move( "previous", event );
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break;
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case $.ui.keyCode.RIGHT:
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this._move( "next", event );
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break;
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case $.ui.keyCode.HOME:
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case $.ui.keyCode.PAGE_UP:
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this._move( "first", event );
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break;
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case $.ui.keyCode.END:
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case $.ui.keyCode.PAGE_DOWN:
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this._move( "last", event );
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break;
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default:
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this.menu.trigger( event );
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prevDef = false;
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}
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if ( prevDef ) {
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event.preventDefault();
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}
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}
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},
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_select: function( item, event ) {
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var oldIndex = this.element[ 0 ].selectedIndex;
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// change native select element
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this.element[ 0 ].selectedIndex = item.index;
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this._setSelected( item );
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this._trigger( "select", event, { item: item } );
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if ( item.index !== oldIndex ) {
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this._trigger( "change", event, { item: item } );
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}
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},
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_setSelected: function( item ) {
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// update button text
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this.buttonText.html( item.label );
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// change ARIA attr
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this.menuItems.find( "a" ).attr( "aria-selected", false );
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this._getSelectedItem().find( "a" ).attr( "aria-selected", true );
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},
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_setOption: function( key, value ) {
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this._super( key, value );
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if ( key === "appendTo" ) {
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this.menuWrap.appendTo( $( value || "body", this.element[ 0 ].ownerDocument )[ 0 ] );
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}
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if ( key === "disabled" ) {
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this.menu.menu( "option", "disabled", value );
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if ( value ) {
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this.element.attr( "disabled", "disabled" );
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this.button.attr( "tabindex", -1 );
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this.close();
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} else {
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this.element.removeAttr( "disabled" );
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this.button.attr( "tabindex", 0 );
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}
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}
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},
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_toggleAttr: function(){
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if ( this.options.dropdown ) {
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this.button.toggleClass( 'ui-corner-top', this.isOpen ).toggleClass( 'ui-corner-all', !this.isOpen );
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}
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this.menuWrap.toggleClass( 'ui-selectmenu-open', this.isOpen );
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this.menu.attr("aria-hidden", !this.isOpen);
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this.button.attr("aria-expanded", this.isOpen);
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},
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_getCreateOptions: function() {
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return { disabled: !!this.element.attr( 'disabled' ) };
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},
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_readOptions: function( options ) {
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var data = [];
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$.each( options, function( index, item ) {
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var option = $( item ),
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optgroup = option.parent( "optgroup" );
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data.push({
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element: option,
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index: index,
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value: option.attr( 'value' ),
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label: option.text() || ' ',
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optgroup: optgroup.attr( "label" ) || "",
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disabled: optgroup.attr( "disabled" ) || option.attr( "disabled" )
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});
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});
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this.items = data;
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},
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_destroy: function() {
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this.menuWrap.remove();
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this.buttonWrap.remove();
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this.element.show();
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}
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});
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}( jQuery ));
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