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Kivy - Interactive Applications and Games in Python

By : Roberto Ulloa
Book Image

Kivy - Interactive Applications and Games in Python

By: Roberto Ulloa

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Kivy - Interactive Applications and Games in Python
Roberto Ulloa
Jun, 2015 | 206 pages
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Table of Contents (13 chapters)
Kivy – Interactive Applications and Games in Python Second Edition
Kivy – Interactive Applications and Games in Python Second Edition
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
GUI Basics – Building an Interface
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
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
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
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 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
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
Index

Chapter 5. Invaders Revenge – an Interactive Multi-touch Game

This chapter introduces a collection of components and strategies to make animated and dynamic applications. Most of them are particularly useful for game development. This chapter is full of examples of how to combine different Kivy elements and teaches strategies to control multiple events happening at the same time. The examples are all integrated in a completely new project, a version of the classic Space Invaders game (Copyright ©1978 Taito Corporation, http://en.wikipedia.org/wiki/Space_Invaders). The following is a list of the main components that we will work on in this chapter:

  • Atlas: A Kivy package that allows us to load images efficiently

  • Sound: Classes that allow sound management

  • Animations: Transitions, time control, events, and operations that can be applied to animate widgets

  • Clock: A class that allows us to schedule events

  • Multi-touch: A strategy that allows us to control different actions according to touches

  • ...

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