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

Using a chart component to display multiple data series


The chart component supports the display of data series with different chart types. In this recipe, rental and payment information for a fictitious movie rental company will be retrieved from a database and will be made available to the chart component by a server page.

Rental data will be presented using a line chart, whereas payment data will be presented using a column chart as shown in the following screenshot:

How to do it...

  1. 1. Set the URL to load the chart from:

    Ext.chart.Chart.CHART_URL = '../ext3/charts.swf';
    
  2. 2. Define the data store:

    Ext.onReady(function() {
    var rentalsStore = new Ext.data.JsonStore({
    url: 'chart-line-remote.php',
    root: 'rentals',
    fields: ['month', 'payments', 'filmsrented'],
    autoLoad: true
    });
    
  3. 3. Create a panel that will contain our chart and define the chart within the panel:

    var pnl = new Ext.Panel({
    title: 'Movie Rentals',
    renderTo: Ext.getBody(),
    width: 500,
    height: 300,
    layout: 'fit',
    items: {
    xtype: 'columnchart...