jQuery UI组合框ONCHANGE不起作用
[英]jquery UI Combobox ONCHANGE not working
问题描述
我正在尝试使用Jquery UI代码制作一个下拉框。 我正在努力了解如何放入onchange事件侦听器，以便：
（a）下拉框的值传递给名为“ x”的变量，并且
（b）将值传递给显示所选值的警报功能。
我尝试将简单的选择框与Jquery一起使用，效果很好。 但是我无法使其与更复杂的代码一起使用。 有一个与此类似的线程已被回答，但我仍然无法使其与下面使用的ui代码一起使用。 感谢您的帮助，也许还把它放在了Fiddle上？
<!DOCTYPE html>
<html>
<head>
<title>JQ onchange alert</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/themes/smoothness/jquery-ui.css" />
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js"></script>
<style type="text/css">
.ui-widget {
font-size: 18px;
}
#combobox{
width: 300px;
}
.custom-combobox {
position: relative;
display: inline-block;
}
.custom-combobox-toggle {
position: absolute;
top: 0;
bottom: 0;
margin-left: -1px;
padding: 0;
/* support: IE7 */
*height: 1.7em;
*top: 0.1em;
}
.custom-combobox-input {
margin: 0;
padding: 0.3em;
}
.ui-autocomplete {
max-height: 250px; /*Max height of scrollbar*/
overflow-y: auto; /* prevent horizontal scrollbar */
overflow-x: hidden; /* add padding to account for vertical scrollbar */
z-index:1000 !important;
}
</style>
</head>
<body>
<div >
<label>Choose:</label>
<select id="combobox" onchange="update()">
<option value="">Select one...</option>
<option value="Amsterdam">Amsterdam</option>
<option value="London">London</option>
<option value="Rome">Rome</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>
</select>
</div>
<script>
$(function() {
$( "#combobox" ).combobox();
});
$( "#combobox" ).change(function() {
alert( "COMBOBOX ITEM VALUE" );
});
(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 more" )
.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();
// Close if already visible
if ( wasOpen ) {
return;
}
// Pass empty string as value to search for, displaying all results
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 ) {
// Selected an item, nothing to do
if ( ui.item ) {
return;
}
// Search for a match (case-insensitive)
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;
}
});
// Found a match, nothing to do
if ( valid ) {
return;
}
// Remove invalid value
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.autocomplete( "instance" ).term = "";
},
_destroy: function() {
this.wrapper.remove();
this.element.show();
}
});
})( jQuery );
</script>
</body>
</html>
1 个解决方案
解决方案1
2 已采纳 2014-07-17 11:37:28
jQuery UI onchange每个循环未按预期工作
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