Book Image

Ext JS 4 Plugin and Extension Development

By : Abdullah Al Mohammad
Book Image

Ext JS 4 Plugin and Extension Development

By: Abdullah Al Mohammad

Overview of this book

Ext JS is a pure JavaScript application framework for building interactive web applications using techniques such as Ajax, DHTML, and DOM scripting. Ext JS 4 Plugin and Extension Development is a practical, step-by-step tutorial which guides you to learn and develop ExtJS plugins and extensions. There are a lot of examples with explanations and plenty of code provided to make it easier and quicker to pick up. Starting with the fundamentals, this book introduces some of the ExtJS library and community provided plugins and extensions and finishes with several hands-on, real world development examples. You will get a clear concept of ExtJS plugins and extensions and learn how to use them. You will also learn how to develop an ExtJS plugin and extension by going through several examples with code and screenshots. Ext JS 4 Plugin and Extension Development book will provide you with the knowledge to develop ExtJS plugins and extensions using real-life examples.
Table of Contents (16 chapters)
Ext JS 4 Plugin and Extension Development
About the Author
About the Reviewers

The ItemSelector extension

ItemSelector is a specialized MultiSelect field that renders as a pair with the MultiSelect field; one with the available options and the other with the selected options. A set of buttons in between, allows the items to be moved between the fields and reordered within the selection. Also, they can be moved via drag-and–drop method.

Here, in the following code, a form panel class is defined, in which we are using the ItemSelector extension as an item of this form:

Ext.define('Examples.view.itemselector.ItemSelectorFormPanel', {
  extend : 'Ext.form.Panel',
  alias : 'widget.itemselectorformpanel',
  requires : ['Ext.ux.form.ItemSelector'],

  constructor : function(config) {

    Ext.apply(this, {
      bodyPadding : 10,
      items : [{
        anchor : '100%',
        xtype: 'itemselector',
        name: 'itemselector',
        store : Ext.create(''),
        valueField : 'name',
        displayField : 'name',
        fromTitle: 'Available...