mirror of
https://github.com/Hopiu/jquery-mobile.git
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471 lines
14 KiB
JavaScript
471 lines
14 KiB
JavaScript
/*
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* jQuery Mobile Framework : custom "selectmenu" plugin
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* Copyright (c) jQuery Project
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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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(function( $, undefined ) {
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var extendSelect = function( widget ){
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var select = widget.select,
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selectID = widget.selectID,
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label = widget.label,
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thisPage = widget.select.closest( ".ui-page" ),
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screen = $( "<div>", {"class": "ui-selectmenu-screen ui-screen-hidden"} ).appendTo( thisPage ),
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selectOptions = widget.select.find("option"),
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isMultiple = widget.isMultiple = widget.select[ 0 ].multiple,
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buttonId = selectID + "-button",
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menuId = selectID + "-menu",
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menuPage = $( "<div data-" + $.mobile.ns + "role='dialog' data-" +$.mobile.ns + "theme='"+ widget.options.menuPageTheme +"'>" +
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"<div data-" + $.mobile.ns + "role='header'>" +
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"<div class='ui-title'>" + label.text() + "</div>"+
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"</div>"+
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"<div data-" + $.mobile.ns + "role='content'></div>"+
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"</div>" ).appendTo( $.mobile.pageContainer ).page(),
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listbox = $("<div>", { "class": "ui-selectmenu ui-selectmenu-hidden ui-overlay-shadow ui-corner-all ui-body-" + widget.options.overlayTheme + " " + $.mobile.defaultDialogTransition } ).insertAfter(screen),
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list = $( "<ul>", {
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"class": "ui-selectmenu-list",
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"id": menuId,
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"role": "listbox",
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"aria-labelledby": buttonId
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}).attr( "data-" + $.mobile.ns + "theme", widget.options.theme ).appendTo( listbox ),
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header = $( "<div>", {
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"class": "ui-header ui-bar-" + widget.options.theme
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}).prependTo( listbox ),
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headerTitle = $( "<h1>", {
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"class": "ui-title"
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}).appendTo( header ),
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headerClose = $( "<a>", {
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"text": widget.options.closeText,
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"href": "#",
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"class": "ui-btn-left"
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}).attr( "data-" + $.mobile.ns + "iconpos", "notext" ).attr( "data-" + $.mobile.ns + "icon", "delete" ).appendTo( header ).buttonMarkup(),
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menuPageContent = menuPage.find( ".ui-content" ),
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menuPageClose = menuPage.find( ".ui-header a" );
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$.extend( widget, {
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select: widget.select,
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selectID: selectID,
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buttonId: buttonId,
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menuId: menuId,
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thisPage: thisPage,
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menuPage: menuPage,
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label: label,
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screen: screen,
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selectOptions: selectOptions,
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isMultiple: isMultiple,
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theme: widget.options.theme,
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listbox: listbox,
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list: list,
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header: header,
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headerTitle: headerTitle,
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headerClose: headerClose,
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menuPageContent: menuPageContent,
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menuPageClose: menuPageClose,
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placeholder: "",
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build: function() {
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var self = this;
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// Create list from select, update state
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self.refresh();
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self.select.attr( "tabindex", "-1" ).focus(function() {
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$( this ).blur();
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self.button.focus();
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});
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// Button events
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self.button.bind( "vclick keydown" , function( event ) {
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if ( event.type == "vclick" ||
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event.keyCode && ( event.keyCode === $.mobile.keyCode.ENTER ||
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event.keyCode === $.mobile.keyCode.SPACE ) ) {
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self.open();
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event.preventDefault();
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}
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});
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// Events for list items
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self.list.attr( "role", "listbox" )
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.delegate( ".ui-li>a", "focusin", function() {
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$( this ).attr( "tabindex", "0" );
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})
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.delegate( ".ui-li>a", "focusout", function() {
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$( this ).attr( "tabindex", "-1" );
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})
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.delegate( "li:not(.ui-disabled, .ui-li-divider)", "vclick", function( event ) {
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// index of option tag to be selected
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var oldIndex = self.select[ 0 ].selectedIndex,
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newIndex = self.list.find( "li:not(.ui-li-divider)" ).index( this ),
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option = self.optionElems.eq( newIndex )[ 0 ];
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// toggle selected status on the tag for multi selects
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option.selected = self.isMultiple ? !option.selected : true;
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// toggle checkbox class for multiple selects
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if ( self.isMultiple ) {
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$( this ).find( ".ui-icon" )
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.toggleClass( "ui-icon-checkbox-on", option.selected )
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.toggleClass( "ui-icon-checkbox-off", !option.selected );
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}
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// trigger change if value changed
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if ( self.isMultiple || oldIndex !== newIndex ) {
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self.select.trigger( "change" );
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}
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//hide custom select for single selects only
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if ( !self.isMultiple ) {
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self.close();
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}
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event.preventDefault();
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})
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.keydown(function( event ) { //keyboard events for menu items
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var target = $( event.target ),
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li = target.closest( "li" ),
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prev, next;
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// switch logic based on which key was pressed
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switch ( event.keyCode ) {
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// up or left arrow keys
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case 38:
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prev = li.prev();
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// if there's a previous option, focus it
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if ( prev.length ) {
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target
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.blur()
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.attr( "tabindex", "-1" );
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prev.find( "a" ).first().focus();
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}
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return false;
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break;
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// down or right arrow keys
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case 40:
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next = li.next();
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// if there's a next option, focus it
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if ( next.length ) {
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target
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.blur()
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.attr( "tabindex", "-1" );
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next.find( "a" ).first().focus();
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}
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return false;
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break;
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// If enter or space is pressed, trigger click
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case 13:
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case 32:
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target.trigger( "vclick" );
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return false;
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break;
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}
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});
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// button refocus ensures proper height calculation
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// by removing the inline style and ensuring page inclusion
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self.menuPage.bind( "pagehide", function() {
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self.list.appendTo( self.listbox );
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self._focusButton();
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});
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// Events on "screen" overlay
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self.screen.bind( "vclick", function( event ) {
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self.close();
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});
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// Close button on small overlays
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self.headerClose.click( function() {
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if ( self.menuType == "overlay" ) {
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self.close();
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return false;
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}
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});
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},
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refresh: function( forceRebuild ){
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var self = this,
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select = this.element,
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isMultiple = this.isMultiple,
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options = this.optionElems = select.find( "option" ),
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selected = this.selected(),
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// return an array of all selected index's
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indicies = this.selectedIndices();
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if ( forceRebuild || select[0].options.length != self.list.find( "li" ).length ) {
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self._buildList();
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}
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self.setButtonText();
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self.setButtonCount();
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self.list.find( "li:not(.ui-li-divider)" )
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.removeClass( $.mobile.activeBtnClass )
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.attr( "aria-selected", false )
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.each(function( i ) {
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if ( $.inArray( i, indicies ) > -1 ) {
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var item = $( this ).addClass( $.mobile.activeBtnClass );
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// Aria selected attr
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item.find( "a" ).attr( "aria-selected", true );
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// Multiple selects: add the "on" checkbox state to the icon
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if ( self.isMultiple ) {
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item.find( ".ui-icon" ).removeClass( "ui-icon-checkbox-off" ).addClass( "ui-icon-checkbox-on" );
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}
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}
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});
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},
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close: function() {
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if ( this.options.disabled || !this.isOpen ) {
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return;
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}
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var self = this;
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if ( self.menuType == "page" ) {
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// rebind the page remove that was unbound in the open function
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// to allow for the parent page removal from actions other than the use
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// of a dialog sized custom select
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if( !self.thisPage.data("page").options.domCache ){
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self.thisPage.bind( "pagehide.remove", function() {
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$(this).remove();
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});
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}
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// doesn't solve the possible issue with calling change page
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// where the objects don't define data urls which prevents dialog key
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// stripping - changePage has incoming refactor
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window.history.back();
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} else {
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self.screen.addClass( "ui-screen-hidden" );
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self.listbox.addClass( "ui-selectmenu-hidden" ).removeAttr( "style" ).removeClass( "in" );
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self.list.appendTo( self.listbox );
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self._focusButton();
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}
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// allow the dialog to be closed again
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self.isOpen = false;
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},
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open: function() {
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if ( this.options.disabled ) {
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return;
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}
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var self = this,
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menuHeight = self.list.parent().outerHeight(),
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menuWidth = self.list.parent().outerWidth(),
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scrollTop = $( window ).scrollTop(),
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btnOffset = self.button.offset().top,
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screenHeight = window.innerHeight,
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screenWidth = window.innerWidth;
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//add active class to button
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self.button.addClass( $.mobile.activeBtnClass );
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//remove after delay
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setTimeout( function() {
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self.button.removeClass( $.mobile.activeBtnClass );
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}, 300);
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function focusMenuItem() {
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self.list.find( $.mobile.activeBtnClass ).focus();
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}
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if ( menuHeight > screenHeight - 80 || !$.support.scrollTop ) {
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// prevent the parent page from being removed from the DOM,
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// otherwise the results of selecting a list item in the dialog
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// fall into a black hole
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self.thisPage.unbind( "pagehide.remove" );
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//for webos (set lastscroll using button offset)
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if ( scrollTop == 0 && btnOffset > screenHeight ) {
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self.thisPage.one( "pagehide", function() {
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$( this ).jqmData( "lastScroll", btnOffset );
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});
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}
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self.menuPage.one( "pageshow", function() {
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// silentScroll() is called whenever a page is shown to restore
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// any previous scroll position the page may have had. We need to
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// wait for the "silentscroll" event before setting focus to avoid
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// the browser"s "feature" which offsets rendering to make sure
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// whatever has focus is in view.
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$( window ).one( "silentscroll", function() {
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focusMenuItem();
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});
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self.isOpen = true;
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});
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self.menuType = "page";
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self.menuPageContent.append( self.list );
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$.mobile.changePage( self.menuPage, {
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transition: $.mobile.defaultDialogTransition
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});
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} else {
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self.menuType = "overlay";
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self.screen.height( $(document).height() )
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.removeClass( "ui-screen-hidden" );
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// Try and center the overlay over the button
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var roomtop = btnOffset - scrollTop,
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roombot = scrollTop + screenHeight - btnOffset,
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halfheight = menuHeight / 2,
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maxwidth = parseFloat( self.list.parent().css( "max-width" ) ),
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newtop, newleft;
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if ( roomtop > menuHeight / 2 && roombot > menuHeight / 2 ) {
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newtop = btnOffset + ( self.button.outerHeight() / 2 ) - halfheight;
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} else {
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// 30px tolerance off the edges
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newtop = roomtop > roombot ? scrollTop + screenHeight - menuHeight - 30 : scrollTop + 30;
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}
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// If the menuwidth is smaller than the screen center is
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if ( menuWidth < maxwidth ) {
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newleft = ( screenWidth - menuWidth ) / 2;
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} else {
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//otherwise insure a >= 30px offset from the left
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newleft = self.button.offset().left + self.button.outerWidth() / 2 - menuWidth / 2;
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// 30px tolerance off the edges
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if ( newleft < 30 ) {
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newleft = 30;
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} else if ( (newleft + menuWidth) > screenWidth ) {
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newleft = screenWidth - menuWidth - 30;
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}
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}
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self.listbox.append( self.list )
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.removeClass( "ui-selectmenu-hidden" )
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.css({
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top: newtop,
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left: newleft
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})
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.addClass( "in" );
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focusMenuItem();
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// duplicate with value set in page show for dialog sized selects
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self.isOpen = true;
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}
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},
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_buildList: function() {
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var self = this,
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o = this.options,
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placeholder = this.placeholder,
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optgroups = [],
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lis = [],
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dataIcon = self.isMultiple ? "checkbox-off" : "false";
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self.list.empty().filter( ".ui-listview" ).listview( "destroy" );
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// Populate menu with options from select element
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self.select.find( "option" ).each( function( i ) {
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var $this = $( this ),
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$parent = $this.parent(),
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text = $this.text(),
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anchor = "<a href='#'>"+ text +"</a>",
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classes = [],
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extraAttrs = [];
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// Are we inside an optgroup?
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if ( $parent.is( "optgroup" ) ) {
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var optLabel = $parent.attr( "label" );
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// has this optgroup already been built yet?
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if ( $.inArray( optLabel, optgroups ) === -1 ) {
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lis.push( "<li data-" + $.mobile.ns + "role='list-divider'>"+ optLabel +"</li>" );
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optgroups.push( optLabel );
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}
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}
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// Find placeholder text
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// TODO: Are you sure you want to use getAttribute? ^RW
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if ( !this.getAttribute( "value" ) || text.length == 0 || $this.jqmData( "placeholder" ) ) {
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if ( o.hidePlaceholderMenuItems ) {
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classes.push( "ui-selectmenu-placeholder" );
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}
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placeholder = self.placeholder = text;
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}
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// support disabled option tags
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if ( this.disabled ) {
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classes.push( "ui-disabled" );
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extraAttrs.push( "aria-disabled='true'" );
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}
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lis.push( "<li data-" + $.mobile.ns + "option-index='" + i + "' data-" + $.mobile.ns + "icon='"+ dataIcon +"' class='"+ classes.join(" ") + "' " + extraAttrs.join(" ") +">"+ anchor +"</li>" );
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});
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self.list.html( lis.join(" ") );
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self.list.find( "li" )
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.attr({ "role": "option", "tabindex": "-1" })
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.first().attr( "tabindex", "0" );
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// Hide header close link for single selects
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if ( !this.isMultiple ) {
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this.headerClose.hide();
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}
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// Hide header if it's not a multiselect and there's no placeholder
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if ( !this.isMultiple && !placeholder.length ) {
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this.header.hide();
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} else {
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this.headerTitle.text( this.placeholder );
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}
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// Now populated, create listview
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self.list.listview();
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},
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_button: function(){
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return $( "<a>", {
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"href": "#",
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"role": "button",
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// TODO value is undefined at creation
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"id": this.buttonId,
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"aria-haspopup": "true",
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// TODO value is undefined at creation
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"aria-owns": this.menuId
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});
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}
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});
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};
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$( "select" ).live( "selectmenubeforecreate", function(){
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var selectmenuWidget = $( this ).data( "selectmenu" );
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if( !selectmenuWidget.options.nativeMenu ){
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extendSelect( selectmenuWidget );
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}
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});
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})( jQuery );
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