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Sencha Charts Essentials

You're reading from Sencha Charts Essentials

Product type Book

Published in May 2015

Publisher

ISBN-13 9781785289767

Pages 214 pages

Edition 1st Edition

Languages

Concepts

Data Visualization

Author (1):

Ajit Kumar

Table of Contents (16) Chapters

Sencha Charts Essentials

Credits

About the Author

About the Reviewers

www.PacktPub.com

Preface

1. Fundamentals of Sencha Charts

2. Working with Out-of-the-box Charts

3. Sencha Charts Architecture

4. Creating a Custom Cartesian Chart

5. Creating a Custom Polar Chart

6. Creating a Custom Spacefilling Chart

7. Theming

8. Working with Touch Gestures

9. Comparison with Other JavaScript Charting Libraries

Index

A walkthrough of an existing CandleStick chart

Let's look at the Stock App that comes along with Sencha Touch SDK and see how these classes have been used to achieve the desired behavior. When you download and extract the Sencha Touch SDK, you will find the source code in the examples/stockapp folder.

The following diagram depicts the Stock App output where we have highlighted the chart-related items:

Design of the Stock App

The Stock App has two charts for the following purposes:

To show the CandleStick/OHLC chart
To show the preview with a range mask to allow the user to resize the preview area

There is a certain event handling mechanism put in place to sync the CandleStick chart with the preview area that is visible to the user by dragging the handlers on the RangeMask. We will limit our focus on how the CandleStick chart and the RangeMask custom sprites are implemented.

The following diagram shows the classes that are involved in the application and how they are connected:

In the preceding diagram...

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Authors (1)

Ajit Kumar

Ajit Kumar has over 16 years of experience in technology areas ranging from embedded systems to large enterprise applications. He worked with various multinational corporations such as Honeywell, Hughes, Virtusa, and Convergys, before starting his own companyWalking Treewhich specializes in Sencha frameworks. Ajit has authored books on open source frameworks, including Sencha Touch Cookbook, Sencha Touch Cookbook Second Edition, Sencha MVC Architecture, and ADempiere 3.6 Cookbook, all by Packt Publishing, which he considers his way of thanking the awesome open source community!

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