Book Image

Appcelerator Titanium Smartphone App Development Cookbook

By : Boydlee Pollentine
Book Image

Appcelerator Titanium Smartphone App Development Cookbook

By: Boydlee Pollentine

Overview of this book

<p>Appcelerator Titanium Mobile allows developers to realize their potential to develop full native iPhone and Android applications by using free Titanium Studio tools without the need to know Objective-C or Java. This practical hands-on cookbook shows you exactly how to leverage the Titanium API to its full advantage and become confident in developing mobile applications in no time at all.<br /><br />Appcelerator Titanium Smartphone App Development Cookbook offers a set of practical and clear recipes with a step-by-step approach for building native applications for both the iPhone and Android platforms using your existing knowledge of JavaScript.<br /><br />This cookbook takes a pragmatic approach to using your JavaScript knowledge to create applications for the iPhone and Android platforms, from putting together basic UIs to handling events and implementation of third party services such Twitter, Facebook and Push notifications. This book shows you how to utilize both remote and local datasources using XML, JSON and the SQLite database system. The topics covered will guide you to use popular Titanium Studio tools effectively and help you leverage all the advanced mobile features such as Geolocation, Accelerometer, animation and more. Finally, you’ll learn how to register developer accounts and how to publish your very own apps to the Android and Apple marketplaces.</p>
Table of Contents (18 chapters)
Appcelerator Titanium Smartphone App Development Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Scaling an ImageView using a Slider control


We have now created a code to select an animated funny face and we have the ability to move our image around using the drag-and-drop method. We need to be able to scale our "me" photograph using a Slider control and a new transformation.

In the following recipe, we will hook up the event listener of our Slider control and use another 2D matrix transformation, and this time change the scale of our imageViewMe control based on the user input.

Note

Complete source code for this recipe can be found in the /Chapter 7/Recipe 4 folder.

How to do it…

Near the bottom of your current source code, you should have instantiated a Slider control named "zoomSlider". We are going to replace that code with a slightly updated version, and then capture the slider's change event in order to scale our imageViewMe component based on the value selected. Replace your declaration of the zoomSlider component with the following code:

var zoomSlider = Titanium.UI.createSlider(...