Kivy – Interactive Applications and Games in Python - Second Edition

Roberto Ulloa

• Verlag: Packt Publishing
• Jahr: 2015
• ISBN:
  9781785284380
• Auflage: 2
• Thema: Informatique
• Thema: Programmation en Python

About This Book

• Utilize the power of Kivy to develop applications that run on all the major platforms
• Build user interfaces (UI) and control multi-touch events to improve the user experience (UX)
• A comprehensive tutorial with simplified code and lots of tips and tricks

Who This Book Is For

If you are a Python developer who wants to create exciting and dynamic UI/UX applications that are compatible with multiple platforms, then this is the book for you. No prior experience with Kivy is required, although you should be familiar with Python and have a fair understanding of software engineering concepts such as inheritance, classes, and instances.

Kivy – Interactive Applications and Games in Python Second Edition

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Table of Contents

Kivy – Interactive Applications and Games in Python Second Edition

Credits

About the Author

About the Reviewers

www.PacktPub.com

Support files, eBooks, discount offers, and more

Why subscribe?

Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. GUI Basics – Building an Interface

Basic interface – Hello World!

Basic widgets – labels and buttons

Layouts

Embedding layouts

PageLayout – swiping pages

Our project – Comic Creator

Summary

2. Graphics – the Canvas

Understanding the canvas

Drawing basic shapes

Adding images, colors, and backgrounds

Structuring graphic instructions

Rotating, translating, and scaling the coordinate space

Comic Creator: PushMatrix and PopMatrix

Summary

3. Widget Events – Binding Actions

Attributes, ID, and root

Basic widget events – dragging the stickman

Localizing coordinates – adding stickmen

Binding and unbinding events – sizing limbs and heads

Binding events in the Kivy language

Creating your own events – the magical properties

Kivy and its properties

Summary

4. Improving the User Experience

ScreenManager – selecting colors for the figures

Color control on the canvas – coloring figures

StencilView – limiting the drawing space

Scatter – multi-touching to drag, rotate, and scale

Recording gestures – line, circle, and cross

Recognizing gestures – drawing with the finger

Behaviors – enhancing widget's functionality

Style – decorating the interface

Factory – replacing a vertex instruction

Summary

5. Invaders Revenge – an Interactive Multi-touch Game

Invaders Revenge – an animated multi-touch game

Atlas – An efficient management of images

Boom – simple sound effects

Ammo – simple animation

Invader – transitions for animations

Dock – automatic binding in the Kivy language

Fleet – infinite concatenation of animations

Scheduling events with the clock

Shooter – multi-touch control

Invasion – moving the shooter with the keyboard

Combining animations with '+' and '&'

Summary

6. Kivy Player – a TED Video Streamer

Video – play, pause, and stop

AsyncImage – creating a cover for the video

Subtitles – tracking the video progression

Control bar – adding buttons to control the video

Slider – including a progression bar

Animation – hiding a widget

Kivy inspector – debugging interfaces

ActionBar – a responsive bar

LoadDialog – displaying a directory of files

ScrollView – displaying a list of videos

Search – query the TED Developer API

Summary

Index

Kivy – Interactive Applications and Games in Python Second Edition

Copyright © 2015 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: September 2013

Second edition: June 2015

Production reference: 1240615

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78528-692-6

www.packtpub.com

Credits

Author

Roberto Ulloa

Reviewers

Takumi Adachi

Philip Bjorge

Joe Dorocak

Vijay Mahrra

Edward C. Delaporte V

Commissioning Editor

Nadeem N. Bagban

Acquisition Editor

Nikhil Karkal

Content Development Editor

Amey Varangaonkar

Technical Editor

Ankur Ghiye

Copy Editor

Adithi Shetty

Project Coordinator

Suzanne Coutinho

Proofreader

Safis Editing

Indexer

Priya Sane

Graphics

Sheetal Aute

Disha Haria

Jason Monteiro

Production Coordinator

Nitesh Thakur

Cover Work

Nitesh Thakur

About the Author

Roberto Ulloa has a diverse academic record in multiple disciplines within the field of computer science. Currently, he is working with artificial societies as part of his PhD thesis at the University of Western Ontario. He obtained an MSc degree from the University of Costa Rica and taught programming and computer networking there. He has earned a living as a web developer, working with Python/Django and PHP/Wordpress. He collaborates with various researchers while also working on his own projects, including his blog (http://robertour.com). He constantly worries that the Internet has already become aware of itself and that we are not able to communicate with it because of the improbability of it being able to speak any of the 6,000-plus odd human languages that exist on the planet.

I would like to thank Celina for supporting me in all my adventures, in particular, this book. I am very grateful for the valuable contributions and feedback of the Packt Publishing team, the editors, and the reviewers. Also, I would like to thank all those people who made the previous edition ...