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  • Book Overview & Buying Kivy Blueprints
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Kivy Blueprints

Kivy Blueprints

By : Vasilkov
3.7 (10)
Buy this Book
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Kivy Blueprints

Kivy Blueprints

3.7 (10)
By: Vasilkov
Buy this Book

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
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Preface
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Write once, run anywhere
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What this book covers
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Setting up the working environment
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Hello, Kivy
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Building a Clock App
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1. Building a Clock App
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The starting point
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Modern UI
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Making the clock tick
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Layout basics
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Styling buttons
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Counting time
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Stopwatch controls
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Summary
2
2. Building a Paint App
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2. Building a Paint App
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Setting the stage
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Fine-tuning the looks
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Drawing touches
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Clearing the screen
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Connecting the dots
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The color palette
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Setting the line thickness
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Summary
3
3. Sound Recorder for Android
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3. Sound Recorder for Android
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Writing platform-dependent code
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Metro UI
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Testing on Android
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Using the native API
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Summary
4
4. Kivy Networking
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4. Kivy Networking
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Writing the chat server
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Screen manager
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Bringing the app online
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Enhancements and eye candy
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Summary
5
5. Making a Remote Desktop App
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5. Making a Remote Desktop App
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The server
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JavaScript client
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Kivy Remote Desktop app
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Summary
6
6. Making the 2048 Game
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6. Making the 2048 Game
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About the game
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Creating the 2048 board
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Making tiles
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Implementing the game logic
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Where to go from here
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Summary
7
7. Writing a Flappy Bird Clone
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7. Writing a Flappy Bird Clone
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Project overview
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Creating an animated background
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Making pipes
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Introducing Kivy Bird
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Collision detection
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Producing sound effects
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Summary
8
8. Introducing Shaders
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8. Introducing Shaders
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Unscientific introduction to OpenGL
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Using custom shaders in Kivy
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Making the Starfield app
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Summary
9
9. Making a Shoot-Em-Up Game
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9. Making a Shoot-Em-Up Game
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Limitations of the project
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Texture atlases at a glance
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Designing a reusable particle system
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Writing the game
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Finishing touches
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Summary
10
A. The Python Ecosystem
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A. The Python Ecosystem
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Index
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Index

Drawing touches

To illustrate one possible scenario for reacting to the touch input, let's draw a circle every time the user touches (or clicks) the screen.

A Widget has an on_touch_down event that will come in handy for this task. We're interested in just the coordinates of every touch for the time being, and they are accessible as follows:

class CanvasWidget(Widget):
    def on_touch_down(self, touch):
        print(touch.x, touch.y)

This example prints the position of touches as they occur. To draw something on the screen instead, we will use the Widget.canvas property. Kivy's Canvas is a logical drawable surface that abstracts away the underlying OpenGL renderer. Unlike the low-level graphical API, the canvas is stateful and preserves the drawing instructions that were added to it.

Speaking of drawing primitives, many of those can be imported from the kivy.graphics package. Examples of drawing instructions are Color, Line, Rectangle, and Bezier, among others.

A very short...

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Tech Concepts
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Programming languages
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Kivy Blueprints
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