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JQuery-based Automatic plug-in

Source: Internet
Author: User
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The following is the html test code: Copy codeThe Code is as follows: <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Title> autoComplete </title>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
<Style type = "text/css">
. AutoComplete {margin: 8px; position: relative; float: left ;}
. AutoComplete input {width: 200px; height: 25px; line-height: 25px; margin: 0; padding: 0 ;}
. AutoComplete ul {z-index: 99; padding: 0px; margin: 0px; border: 1px #333 solid; width: 200px; background: white; display: none; position: absolute; left: 0; top: 28px ;}
. AutoComplete li {list-style: none ;}
. AutoComplete li a {display: block; color: #000; text-decoration: none; padding: 1px 0 1px 5px ;}
. AutoComplete li a: hover {color: #000; background: # ccc; border: none ;}
</Style>
<Script type = "text/javascript" src = "../javascript/lib/jquery-1.4.2.min.js"> </script>
<Script type = "text/javascript" src = "../javascript/autoComplete. js"> </script>
</Head>
<Body>
<Div class = "autoComplete"> <input value = "input"/> <ul> <li> </ul> </div>
<Div class = "autoComplete"> <input value = "input"/> <ul> <li> </ul> </div>
<Div class = "autoComplete"> <input value = "input"/> <ul> <li> </ul> </div>
<Div class = "autoComplete"> <input value = "input"/> <ul> <li> </ul> </div>
</Body>
</Html>

Below is the jQuery plug-in:Copy codeThe Code is as follows:; (function ($ ){
/* Plugin */
$. Fn. autoComplete = function (o ){
If (o. ajax) o. ajax = $. extend ({url: '', dataType: 'json', async: true}, o. ajax || {});
O. elemCSS = $. extend ({focus: {'color': '# f00'}, blur: {'color':' # 000'}, o. elemCSS | | {});
O = $. extend ({
Source: null,/* privide an array for match */
Ajax: {},/* provide an ajax conditions, if source is exist this parameter is invalid */
Input: 'input',/* provide the selector of input box */
Popup: 'ul ',/* provide the selector of popup box, it must be a ul element of html */
ElemCSS: {}/* provide the focus and blur css objects of items in the popup box */
}, O | {});
Var handler = (function (){
Var handler = function (e, o) {return new handler. prototype. init (e, o );};
Handler. prototype = {
E: null, o: null, timer: null, show: 0, $ input: null, $ popup: null,
Init: function (e, o ){
This. e = e;
This. o = o;
This. $ input = $ (this. o. input, this. e );
This. $ popup = $ (this. o. popup, this. e );
This. initEvent ();
},
Match: function (quickExpr, value, source ){
For (var I in source ){
If (value. length> 0 & quickExpr.exe c (source [I])! = Null)
This. $ popup. append ('<li> <a href = "javascript:;">' + source [I] + '</a> </li> ');
}
If ($ ('Li A', this. $ popup [0]). length) {this. $ popup. show ();} else {this. $ popup. hide ();}
},
Fetch: function (ajax, search, quickExpr ){
Var that = this;
$. Ajax ({
Url: ajax. url + search,
DataType: ajax. dataType,
Async: ajax. async,
Error: function (data, es, et) {alert ('error ');},
Success: function (data) {that. match (quickExpr, search, data );}
});
},
InitEvent: function (){
Var that = this;
This. $ input. focus (function (){
Var value = this. value, quickExpr = RegExp ('^' + value, 'I'), self = this;
That. timer = setInterval (function (){
If (value! = Self. value ){
Value = self. value;
That.$popup.html ('');
If (value! = ''){
QuickExpr = RegExp ('^' + value );
If (that. o. source) that. match (quickExpr, value, that. o. source );
Else if (that. o. ajax) that. fetch (that. o. ajax, value, quickExpr );
}
}
},200 );
}). Blur (function (){
ClearInterval (that. timer );
Var current =-1;
Var len = that. $ popup. find ("li a"). length-1;
$ ("Li a", that. $ popup [0]). click (function (){
That. $ input [0]. value = $ (this). text ();
That.w.popup.html (''). hide ();
}). Focus (function (){
Current = $ (this). parent (). index ();
Using (this).css (that. o. elemCSS. focus );
}). Blur (function (){
Using (this).css (that. o. elemCSS. blur );
});
$ ("Li a", that. $ popup [0]). keydown (function (event ){
If (event. keyCode = 40 ){
Current ++;
If (current <0) current = len;
If (current> len) current = 0;
That. $ popup. find ("li a"). get (current). focus ();
} Else if (event. keyCode = 38 ){
Current --;
If (current> len) current = 0;
If (current <0) current = len;
That. $ popup. find ("li a"). get (current). focus ();
}
});
}). Keydown (function (event ){
If (event. keyCode = 40 ){
That. $ popup. blur (). find ("li a"). get (0). focus ();
}
});
$ (This. e). hover (function () {that. show = 1 ;}, function () {that. show = 0 ;});
$ (Document). click (function () {if (that. show = 0) {that. $ popup. hide ();}});
}
};
Handler. prototype. init. prototype = handler. prototype;/* JQuery style */
Return handler;
})();
Return this. each (function () {handler (this, o );});
};
/* Invoke */
$ (Document). ready (function (){
$ (". AutoComplete"). autoComplete ({
Source: [7567,956,456,938,],
// Ajax: {url: './php/fetch. php? Search = ', dataType: 'json', async: false },
ElemCSS: {focus: {'color': '#0f0'}, blur: {'color': '# f00 '}}
});
});
/* Conclude */
}) (JQuery );

When an ajax request is called, it returns a json data. I used php to read the database for testing. If necessary, the Code is as follows:Copy codeThe Code is as follows: <? Php
Class DataFetch {
Private $ conn, $ rs;
Function _ construct (){
$ This-> conn = mysql_connect ("localhost", "root", "pwd") or die ("Cant't connect host ~ ");
Mysql_select_db ("studentinfo", $ this-> conn) or die ("Cant't select database ~ ");
}
Public function data_list ($ s ){
$ This-> rs = mysql_query ("select sno from student where sno like '$ s %'") or die ("Can't fetch ~ ");
$ DataList = array ();
While ($ row = mysql_fetch_array ($ this-> rs, MYSQL_ASSOC )){
Array_push ($ dataList, $ row );
}
Return $ dataList;
}
}
$ Search = isset ($ argv [1])? $ Argv [1]:
(Isset ($ _ GET ['search'])? $ _ GET ['search']: '');
$ Fetch = new DataFetch ();
$ Data = $ fetch-> data_list ($ search );
Echo '[';
Foreach ($ data as $ key => $ value ){
Echo "\ n \ t ";
Echo '"'. $ value ['sno']. '"';
If ($ key! = Count ($ data)-1) echo ','; else echo "\ n ";
}
Echo "] \ n ";
?>

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