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428 lines
10 KiB
JavaScript
428 lines
10 KiB
JavaScript
/*
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* jQuery UI Selectmenu @VERSION
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*
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* Copyright 2011, 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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* jquery.ui.button.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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// set a default id value, generate a new random one if not set by developer
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var selectmenuId = this.element.attr( 'id' ) || 'ui-selectmenu-' + Math.random().toString( 16 ).slice( 2, 10 );
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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._bind({
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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._bind( this.button, this._buttonEvents );
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this._drawMenu();
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if ( this.element.attr( '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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href: '#' + this.ids.id,
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tabindex: ( tabindex ? tabindex : this.element.attr( 'disabled' ) ? -1 : 0 ),
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id: this.ids.button,
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css: {
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width: this.element.outerWidth()
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},
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'aria-owns': this.ids.menu,
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'aria-haspopup': true
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})
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.button({
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label: this.element.find( "option:selected" ).text(),
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icons: {
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primary: ( this.options.dropdown ? 'ui-icon-triangle-1-s' : 'ui-icon-triangle-2-n-s' )
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}
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});
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// wrap and insert new button
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this.buttonWrap = $( '<span />' )
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.addClass( 'ui-selectmenu-button' )
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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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// set width
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if ( this.options.dropdown ) {
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var setWidth = this.button.outerWidth();
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} else {
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var text = this.button.find( "span.ui-button-text");
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var setWidth = text.width() + parseFloat( text.css( "padding-left" ) ) || 0 + parseFloat( text.css( "margin-left" ) || 0 );
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}
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// wrap menu
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this.menuWrap = $( '<div />' )
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.addClass( 'ui-selectmenu-menu' )
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.width( setWidth )
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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 flag = false,
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item = ui.item.data( "item.selectmenu" ),
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oldIndex = that.element[0].selectedIndex;
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that._setIndex( item.index );
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that._trigger( "select", event, { item: item } );
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if ( item.index != oldIndex ) {
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that._trigger( "change", event, { item: item } );
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}
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if ( that.isOpen ) {
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event.preventDefault();
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that.close( event, true);
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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 && item.index != that.focus ) {
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that._trigger( "focus", event, { item: item } );
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}
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that.focus = item.index;
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}
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})
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// change ARIA role
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.attr( 'role', 'menubox' );
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// document click closes menu
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this._bind( document, {
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'click': function( event ) {
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if ( this.isOpen && !$( event.target ).closest( "#" + 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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},
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refresh: function() {
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this.menu.empty();
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this._readOptions();
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this._renderMenu( this.menu, this.items );
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this.menu.menu( "refresh" );
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// button option label wont work here
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this.button.children( '.ui-button-text' ).text( this.items[ this.element[0].selectedIndex ].label );
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// adjust ARIA
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this.menu.find( "li" ).not( '.ui-selectmenu-optgroup' ).find( 'a' ).attr( 'role', 'option' );
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this.menu.attr( "aria-activedescendant" , this.menu.find( "li.ui-menu-item a" ).eq( this.element[0].selectedIndex ).attr( "id" ) );
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// change styles?
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this._setOption( "dropdown", this.options.dropdown );
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// transfer disabled state
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if ( this.element.attr( 'disabled' ) ) {
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this.disable();
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} else {
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this.enable()
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}
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},
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open: function( event ) {
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var currentItem = this._getSelectedItem();
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if ( !this.options.disabled ) {
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if ( this.options.dropdown ) {
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this.button
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.addClass( 'ui-corner-top' )
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.removeClass( 'ui-corner-all' );
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}
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this.menuWrap.addClass( 'ui-selectmenu-open' );
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this.menu.attr("aria-hidden", false);
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// needs to be fired after the document click event has closed all other Selectmenus
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// otherwise the current item is not indicated
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// TODO check if this should be handled by Menu
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this._delay( function(){
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this.menu.menu( "focus", event, currentItem );
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}, 1);
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if ( !this.options.dropdown ) {
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// calculate offset
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var _offset = ( this.menu.offset().top - currentItem.offset().top + ( this.button.outerHeight() - currentItem.outerHeight() ) / 2);
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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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offset: "0 " + _offset
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});
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}
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this.menuWrap
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.zIndex( this.element.zIndex() + 1 )
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.position( $.extend({
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of: this.button
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}, this.options.position ));
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this.isOpen = true;
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this._trigger( "open", event );
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}
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},
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close: function( event, focus ) {
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if ( this.isOpen ) {
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if ( this.options.dropdown ) {
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this.button
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.addClass( 'ui-corner-all' )
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.removeClass( 'ui-corner-top' );
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}
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this.menuWrap.removeClass( 'ui-selectmenu-open' );
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this.menu.attr("aria-hidden", true);
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this.isOpen = false;
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if ( focus ) {
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this.button.focus();
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}
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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.buttonWrap.add( this.menuWrap );
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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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var optgroup = $( '<li class="ui-selectmenu-optgroup">' + item.optgroup + '</li>' );
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if ( item.element.parent( "optgroup" ).attr( "disabled" ) ) optgroup.addClass( 'ui-state-disabled' );
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ul.append( optgroup );
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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' ).text( item.label );
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} else {
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li.append( $( "<a />", {
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text: item.label,
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href: '#'
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})
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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.menu.find( "li" ).not( '.ui-selectmenu-optgroup' )[ direction ]() );
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} else {
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// if menu is closed we need to focus the element first to indicate correct element
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if ( !this.isOpen ) {
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this.menu.menu( "focus", event, this._getSelectedItem() );
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}
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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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// select if selectmenu is closed
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if ( !this.isOpen ) {
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this.menu.menu( "select", event );
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}
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},
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_getSelectedItem: function() {
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return this.menu.find( "li" ).not( '.ui-selectmenu-optgroup' ).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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// init Menu on first focus
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focus: function( event ) {
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this.refresh();
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this.button.unbind( "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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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.SPACE:
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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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_setIndex: function( index ) {
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this.element[0].selectedIndex = index;
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this.button.button( "option", "label", this.items[ index ].label );
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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( $( value || "body", this.element[0].ownerDocument )[0] );
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}
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if ( key === "dropdown" ) {
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this.menu.toggleClass( 'ui-corner-bottom', value ).toggleClass( 'ui-corner-all', !value );
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}
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if ( key === "disabled" ) {
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this.button.button( "option", "disabled", value );
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this.menu.menu( "option", "disabled", value );
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if ( value ) {
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this.element.attr( "disabled", "disabled" );
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this.button.attr( "tabindex", -1 );
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this.close();
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} else {
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this.element.removeAttr( "disabled" );
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this.button.attr( "tabindex", 0 );
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}
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}
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},
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_readOptions: function() {
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var data = [];
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$.each( this.element.find( 'option' ), 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" ) || false,
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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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