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Kivy Blueprints

Kivy Blueprints

By : Vasilkov
3.7 (10)
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Kivy Blueprints

Kivy Blueprints

3.7 (10)
By: Vasilkov

Overview of this book

This book is intended for programmers who are comfortable with the Python language and who want to build desktop and mobile applications with rich GUI in Python with minimal hassle. Knowledge of Kivy is not strictly required—every aspect of the framework is described when it's first used.
Table of Contents (12 chapters)
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Preface
Preface
Write once, run anywhere
What this book covers
Setting up the working environment
Hello, Kivy
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Building a Clock App
1. Building a Clock App
The starting point
Modern UI
Making the clock tick
Layout basics
Styling buttons
Counting time
Stopwatch controls
Summary
2
2. Building a Paint App
2. Building a Paint App
Setting the stage
Fine-tuning the looks
Drawing touches
Clearing the screen
Connecting the dots
The color palette
Setting the line thickness
Summary
3
3. Sound Recorder for Android
3. Sound Recorder for Android
Writing platform-dependent code
Metro UI
Testing on Android
Using the native API
Summary
4
4. Kivy Networking
4. Kivy Networking
Writing the chat server
Screen manager
Bringing the app online
Enhancements and eye candy
Summary
5
5. Making a Remote Desktop App
5. Making a Remote Desktop App
The server
JavaScript client
Kivy Remote Desktop app
Summary
6
6. Making the 2048 Game
6. Making the 2048 Game
About the game
Creating the 2048 board
Making tiles
Implementing the game logic
Where to go from here
Summary
7
7. Writing a Flappy Bird Clone
7. Writing a Flappy Bird Clone
Project overview
Creating an animated background
Making pipes
Introducing Kivy Bird
Collision detection
Producing sound effects
Summary
8
8. Introducing Shaders
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8. Introducing Shaders
Unscientific introduction to OpenGL
Using custom shaders in Kivy
Making the Starfield app
Summary
9
9. Making a Shoot-Em-Up Game
9. Making a Shoot-Em-Up Game
Limitations of the project
Texture atlases at a glance
Designing a reusable particle system
Writing the game
Finishing touches
Summary
10
A. The Python Ecosystem
A. The Python Ecosystem
11
Index
Index

Making the Starfield app

Armed with our newfound knowledge of GLSL, let's build a starfield screensaver, that is, a non-interactive demonstration of stars fleeing from the center of the screen to its sides, under the influence of an imaginary centrifugal force or something.

Tip

As dynamic visual effects are hard to describe unequivocally and screenshots aren't very helpful in this regard either, run the code that accompanies the chapter to get a better idea of what's going on.

Conceptually, each star goes through the same action sequence:

  1. It spawns randomly near the center of the screen.

  2. The star moves in the opposite direction from the screen center until it's no longer visible.

  3. Then it respawns, going back to square one.

We will also make stars accelerate and grow in size as they approach the edges of the screen to simulate the faux depth.

The following screenshot attempts (or, to be more specific, fails due to the highly dynamic nature of the demo) to illustrate what the end result will look...

End of Chapter 8
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