13
Mar
11

Ajax Simulated Combo Boxes using ExtJS


This page describes the process of creating a combo box that behaves like its Ajax driven. Adding this component is easy and with very little effort you can improve the usability of your page.

Requirements

  • Text Editor
  • HTML Web Server

Procedure

  1. Include the proper script statements to reference the ext js libraries. (see below)
  2. Create an “id” field for the combo box
  3. Insert the highlighted code below onto your page and specify the “id” of the component you want to enhance in the “transform” field of the js code below.

index.html

<html>
<head>

<link rel="stylesheet" type="text/css"
    href="http://dev.sencha.com/deploy/ext-3.3.1/resources/css/ext-all.css"/>

<script type="text/javascript"
    src="http://dev.sencha.com/deploy/ext-3.3.1/adapter/ext/ext-base-debug.js">
</script>
<script type="text/javascript"
    src="http://dev.sencha.com/deploy/ext-3.3.1/ext-all-debug.js">
</script>

<script type="text/javascript">

function buildWindow() {
 
var converted = new Ext.form.ComboBox({
    typeAhead: true,
    triggerAction: 'all',
    transform:'state',
    width:135,
    forceSelection:true
});

}
Ext.onReady(buildWindow);
</script>
 
</head>
<body>

<div>
Transformed select:<br/> <select name="state" id="state">

<option value="AL">Alabama</option>
<option value="AK">Alaska</option>
<option value="AZ">Arizona</option>
<option value="AR">Arkansas</option>
<option value="CA">California</option>
<option value="CO">Colorado</option>
<option value="CT">Connecticut</option>
<option value="DE">Delaware</option>
<option value="FL">Florida</option>

<option value="GA">Georgia</option>
<option value="HI">Hawaii</option>
<option value="ID">Idaho</option>
<option value="IL">Illinois</option>
<option value="IN">Indiana</option>
<option value="IA">Iowa</option>
<option value="KS">Kansas</option>
<option value="KY">Kentucky</option>
<option value="LA">Louisiana</option>

<option value="ME">Maine</option>
<option value="MD">Maryland</option>
<option value="MA">Massachusetts</option>
<option value="MI">Michigan</option>
<option value="MN">Minnesota</option>
<option value="MS">Mississippi</option>
<option value="MO">Missouri</option>
<option value="MT">Montana</option>
<option value="NE">Nebraska</option>

<option value="NV">Nevada</option>
<option value="NH">New Hampshire</option>
<option value="NJ">New Jersey</option>
<option value="NM">New Mexico</option>
<option value="NY">New York</option>
<option value="NC">North Carolina</option>
<option value="ND">North Dakota</option>
<option value="OH" selected>Ohio</option>
<option value="OK">Oklahoma</option>

<option value="OR">Oregon</option>
<option value="PA">Pennsylvania</option>
<option value="RI">Rhode Island</option>
<option value="SC">South Carolina</option>
<option value="SD">South Dakota</option>
<option value="TN">Tennessee</option>
<option value="TX">Texas</option>
<option value="UT">Utah</option>
<option value="VT">Vermont</option>

<option value="VA">Virginia</option>
<option value="WA">Washington</option>
<option value="WV">West Virginia</option>
<option value="WI">Wisconsin</option>
<option value="WY">Wyoming</option>
</select>
</div>
</p>
</body>
</html>
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