我正在使用 phonegap 开发一个 android 应用程序。在我使用 jquery 组合框的应用程序中有一个自动完成选择框。当我为组合框使用静态源时，组合框工作正常。但我必须使用动态源，因为有大量数据。数据存储在 sqlite 数据库中。数据中有大约 12000 个项目，我想过滤掉它以仅显示大约 10 个项目，在组合框中键入了起始字母。但是组合框只显示前 10 个项目，而不是在数据库中搜索每个键入的单词。仅在按下退格键时才搜索数据库。
这是组合框代码：
function loadCustomer(){
//console.log('No rows affected!');
//navigator.notification.alert(results.rows.item(0).name);
(function( $ ) {
$.widget( "ui.customer", {
_create: function() {
var input,
self = this,
select = this.element.hide(),
selected = select.children( ":selected" ),
value = selected.val() ? selected.text() : "",
wrapper = this.wrapper = $( "<span>" )
.addClass( "ui-customer" )
.insertAfter( select );
input = $( "<input id='customer_input' autofocus>" )
.appendTo( wrapper )
.val( value )
.addClass( "ui-state-default ui-customer-input" )
.autocomplete({
delay: 0,
minLength: 0,
autofocus:true,
source: function( request, response ) {
var matcher = new RegExp( "^" + $.ui.autocomplete.escapeRegex(request.term), "i" );
response( select.children( "option" ).map(function() {
var text = $( this ).text();
if ( this.value && ( !request.term || matcher.test(text) ) )
return {
label: text.replace(
new RegExp(
"(?![^&;]+;)(?!<[^<>]*)(" +
$.ui.autocomplete.escapeRegex(request.term) +
")(?![^<>]*>)(?![^&;]+;)", "gi"
), "<strong>$1</strong>" ),
value: text,
option: this
};
}) );
},
select: function( event, ui ) {
ui.item.option.selected = true;
self._trigger( "selected", event, {
item: ui.item.option
});
show_balance();
updateGrid();
$("#next_link").focus();
},
search: function(event, ui) {var db = window.openDatabase("Database", "1.0", "Cordova Demo", 2097152);
db.transaction(selectCustomer, errorCB);},
change: function( event, ui ) {
if ( !ui.item ) {
var matcher = new RegExp( "^" + $.ui.autocomplete.escapeRegex( $(this).val() ) + "$", "i" ),
valid = false;
select.children( "option" ).each(function() {
if ( $( this ).text().match( matcher ) ) {
this.selected = valid = true;
return false;
}
});
if ( !valid ) {
// remove invalid value, as it didn't match anything
$( this ).val( "" );
select.val( "" );
input.data( "autocomplete" ).term = "";
return false;
}
}
}
})
.focus(function() {
$(this).autocomplete("search", "");})
.addClass( "ui-widget ui-widget-content ui-corner-left" );
input.data( "autocomplete" )._renderItem = function( ul, item ) {
return $( "<li></li>" )
.data( "item.autocomplete", item )
.append( "<a>" + item.label + "</a>" )
.appendTo( ul );
};
$( "<a>" )
.attr( "tabIndex", -1 )
.attr( "title", "Show All Items" )
.appendTo( wrapper )
.button({
icons: {
primary: "ui-icon-triangle-1-s"
},
text: false
})
.removeClass( "ui-corner-all" )
.addClass( "ui-corner-right ui-customer-toggle" )
.click(function() {
// close if already visible
if ( input.autocomplete( "widget" ).is( ":visible" ) ) {
input.autocomplete( "close" );
return;
}
// work around a bug (likely same cause as #5265)
$( this ).blur();
// pass empty string as value to search for, displaying all results
input.autocomplete( "search", "" );
input.focus();
});
},
destroy: function() {
this.wrapper.remove();
this.element.show();
$.Widget.prototype.destroy.call( this );
}
});
})( jQuery );
$(function() {
$( "#customer" ).customer();
});
return false;
}
这是从数据库中选择数据的代码：
function selectCustomer(tx) {
requestterm=$("#customer_input").val();
tx.executeSql('SELECT * FROM CUSTOMER WHERE name LIKE "'+requestterm+'%" LIMIT 10', [], selectCustomerSuccess, errorCB);
}
function selectCustomerSuccess(tx, results) {
if (!results.rowsAffected) {
//console.log('No rows affected!');
//navigator.notification.alert(results.rows.item(0).name);
var len = results.rows.length;
var options = '<option value=""></option>';
for (var i=0; i<len; i++) {
options += '<option value="' + results.rows.item(i).custid + '">' + results.rows.item(i).name + '</option>';
}
$("#customer").html(options);
$('#customer option:first').attr('selected', 'selected');
return false;
}
}
请帮我。提前致谢。