自动完成(Autocomplete) - 组合框(Combobox)
一个由 Autocomplete 和 Button 创建的自定义部件。您可以键入一些字符,来获得基于您的输入过滤的结果,或者使用按钮从完整列表中选择。
该输入是从一个已有的 select 元素中读取,传递给带有自定义的 source 选项的 Autocomplete。
这是一个不被支持的不完美的部件。这里纯粹是为了演示 autocomplete 定制功能。如需了解更多有关该部件工作原理的细节,请点击这里查看相关的 jQuery 文章。
源代码
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>jQuery UI 自动完成(Autocomplete) - 组合框(Combobox)</title> <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css"> <script src="//code.jquery.com/jquery-1.9.1.js"></script> <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script> <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css"> <style> .custom-combobox { position: relative; display: inline-block; } .custom-combobox-toggle { position: absolute; top: 0; bottom: 0; margin-left: -1px; padding: 0; /* 支持: IE7 */ *height: 1.7em; *top: 0.1em; } .custom-combobox-input { margin: 0; padding: 0.3em; } </style> <script> (function( $ ) { $.widget( "custom.combobox", { _create: function() { this.wrapper = $( "<span>" ) .addClass( "custom-combobox" ) .insertAfter( this.element ); this.element.hide(); this._createAutocomplete(); this._createShowAllButton(); }, _createAutocomplete: function() { var selected = this.element.children( ":selected" ), value = selected.val() ? selected.text() : ""; this.input = $( "<input>" ) .appendTo( this.wrapper ) .val( value ) .attr( "title", "" ) .addClass( "custom-combobox-input ui-widget ui-widget-content ui-state-default ui-corner-left" ) .autocomplete({ delay: 0, minLength: 0, source: $.proxy( this, "_source" ) }) .tooltip({ tooltipClass: "ui-state-highlight" }); this._on( this.input, { autocompleteselect: function( event, ui ) { ui.item.option.selected = true; this._trigger( "select", event, { item: ui.item.option }); }, autocompletechange: "_removeIfInvalid" }); }, _createShowAllButton: function() { var input = this.input, wasOpen = false; $( "<a>" ) .attr( "tabIndex", -1 ) .attr( "title", "Show All Items" ) .tooltip() .appendTo( this.wrapper ) .button({ icons: { primary: "ui-icon-triangle-1-s" }, text: false }) .removeClass( "ui-corner-all" ) .addClass( "custom-combobox-toggle ui-corner-right" ) .mousedown(function() { wasOpen = input.autocomplete( "widget" ).is( ":visible" ); }) .click(function() { input.focus(); // 如果已经可见则关闭 if ( wasOpen ) { return; } // 传递空字符串作为搜索的值,显示所有的结果 input.autocomplete( "search", "" ); }); }, _source: function( request, response ) { var matcher = new RegExp( $.ui.autocomplete.escapeRegex(request.term), "i" ); response( this.element.children( "option" ).map(function() { var text = $( this ).text(); if ( this.value && ( !request.term || matcher.test(text) ) ) return { label: text, value: text, option: this }; }) ); }, _removeIfInvalid: function( event, ui ) { // 选择一项,不执行其他动作 if ( ui.item ) { return; } // 搜索一个匹配(不区分大小写) var value = this.input.val(), valueLowerCase = value.toLowerCase(), valid = false; this.element.children( "option" ).each(function() { if ( $( this ).text().toLowerCase() === valueLowerCase ) { this.selected = valid = true; return false; } }); // 找到一个匹配,不执行其他动作 if ( valid ) { return; } // 移除无效的值 this.input .val( "" ) .attr( "title", value + " didn't match any item" ) .tooltip( "open" ); this.element.val( "" ); this._delay(function() { this.input.tooltip( "close" ).attr( "title", "" ); }, 2500 ); this.input.data( "ui-autocomplete" ).term = ""; }, _destroy: function() { this.wrapper.remove(); this.element.show(); } }); })( jQuery ); $(function() { $( "#combobox" ).combobox(); $( "#toggle" ).click(function() { $( "#combobox" ).toggle(); }); }); </script> </head> <body> <div class="ui-widget"> <label>您喜欢的编程语言:</label> <select id="combobox"> <option value="">请选择...</option> <option value="ActionScript">ActionScript</option> <option value="AppleScript">AppleScript</option> <option value="Asp">Asp</option> <option value="BASIC">BASIC</option> <option value="C">C</option> <option value="C++">C++</option> <option value="Clojure">Clojure</option> <option value="COBOL">COBOL</option> <option value="ColdFusion">ColdFusion</option> <option value="Erlang">Erlang</option> <option value="Fortran">Fortran</option> <option value="Groovy">Groovy</option> <option value="Haskell">Haskell</option> <option value="Java">Java</option> <option value="JavaScript">JavaScript</option> <option value="Lisp">Lisp</option> <option value="Perl">Perl</option> <option value="PHP">PHP</option> <option value="Python">Python</option> <option value="Ruby">Ruby</option> <option value="Scala">Scala</option> <option value="Scheme">Scheme</option> </select> </div> <button id="toggle">显示基础的选择框</button> </body> </html>