Book Image

Ext JS 3.0 Cookbook

Book Image

Ext JS 3.0 Cookbook

Overview of this book

Using Ext JS you can easily build desktop-style interfaces in your web applications. Over 400,000 developers are working smarter with Ext JS and yet most of them fail to exercise all of the features that this powerful JavaScript library has to offer. Get to grips with all of the features that you would expect with this quick and easy-to-follow Ext JS Cookbook. This book provides clear instructions for getting the most out of Ext JS with and offers many exercises to build impressive rich internet applications. This cookbook shows techniques and "patterns" for building particular interface styles and features in Ext JS. Pick what you want and move ahead. It teaches you how to use all of the Ext JS widgets and components smartly, through practical examples and exercises. Native and custom layouts, forms, grids, listviews, treeviews, charts, tab panels, menus, toolbars, and many more components are covered in a multitude of examples.The book also looks at best practices on data storage, application architecture, code organization, presenting recipes for improving themóour cookbook provides expert information for people working with Ext JS.
Table of Contents (15 chapters)
Ext JS 3.0 Cookbook
Credits
About the Author
About the Reviewer
Preface

Implementing data paging


Paging increases your application's efficiency. As paging reduces the amount of data exchanged with the server, it decreases the time required for the browser to render records as well as the resources needed to cache them.

In this recipe, a grid component that displays information about movies will display paged data returned by the server. The grid will use a paging toolbar to provide a means for navigating the paged data, as well as the ability to count the number of records and pages.

How to do it...

  1. 1. Create the data store:

    var store = new Ext.data.JsonStore({
    url: 'grid-paging-remote.php',
    root: 'movies',
    idProperty: 'id',
    totalProperty: 'count',
    fields: ['id', 'title', 'release_year', 'rating'],
    remoteSort: true
    });
    
  2. 2. Set the default sort:

    store.setDefaultSort('release_year', 'desc');
    
  3. 3. Define the grid panel:

    Ext.onReady(function() {
    var grid = new Ext.grid.GridPanel({
    title: 'Movies',
    store: store,
    columns: [
    { header: "ID", width: 30, dataIndex: 'id', sortable...