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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
11
Index
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Index

Setting the line thickness

The last and easiest feature that we are going to implement is a simple line thickness selector. As you can see in the following screenshot, we're reusing assets and styles from the previous part, the color palette.

Setting the line thickness

Line width selector

This UI uses yet another RadioButton subclass, unimaginatively named LineWidthButton. Append the following declaration to the paint.kv file:

<LineWidthButton@ColorButton>:
    group: 'line_width'
    on_release: app.canvas_widget.set_line_width(self.text)
    color: C('#2C3E50')
    background_color: C('#ECF0F1')

Key differences from ColorButton are highlighted in the preceding code. These new buttons belong to another radio group and fire another event handler when interacted with. Other than this, they are very similar.

The layout is equally simple, built in the same fashion as that of the color palette, except that it's vertical:

BoxLayout:
    orientation: 'vertical'
    padding...
Visually different images
CONTINUE READING
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Tech Concepts
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Programming languages
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Kivy Blueprints
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