The book is full of practical task-based recipes to be performed while developing multitouch applications with Kivy. The focus of this book is to guide you through the Kivy framework to develop apps and get your apps ready for distribution in App Stores and Android devices. We'll focus on common, real-world scenarios. You'll be able to leverage these recipes right away, which allows you to create most diverse apps and learn how to distribute them using the Kivy framework, and widen your proficiency in developing multitouch applications with Kivy.
Chapter 1, Kivy and the Kv Language, introduces the Python code, Kv language, widgets, and Kivy garden. The topics covered in this chapter lay the foundation for the remaining code samples in each chapter.
Chapter 2, Input, Motion, and Touch, demonstrates some of the most common recipient-related management tasks, such as evolving to the touchscreen, using the gyroscope, and detecting multitapping. You'll also learn how to recognize touch shapes, record gestures, and differentiate between touch and motion events.
Chapter 3, Events, shows how to schedule a one-time event and a repetitive event. Triggering events, defining widget events, creating custom events are also covered in this chapter.
Chapter 4, Widgets, covers the manipulation of widget tree, traversing of tree. It also covers the FloatLayout, BoxLayout, StackLayout, AnchorLayout, and action bar.
Chapter 5, Graphics – Canvas and Instructions, explains various methods, such as separating with the screen manager, using context instructions, and using drawing instructions. You'll learn how to modify with multitouching and storing and retrieving the coordinate space context.
Chapter 6, Advancing Graphics – Shaders and Rendering, covers Carousel, layouts, and shaders. The other topics covered in this chapter are rendering in a Framebuffer and optimizing graphics.
Chapter 7, The API in Detail, introduces API and covers the logging objects, parsing, applying utils, using spelling, adding effects, and adding text.
Chapter 8, Packaging our Apps for PC, shows how to perform packing for Windows, Linux, and MacOs. It also shows multimedia for Windows and running apps in Windows and MacOS.
Chapter 9, Kivy for Mobile Devices, explains various methods, such as packaging for iOS and resizing the screen into iOS. You'll learn preparing for the App Store, packaging for Android, and resizing the screen into Android.
To complete the recipes in this book, you'll need the following:
Kivy 1.9.0
Cross-platform
Windows/OS X/Linux
iOS device / Android device
iOS and OS X / Android and Linux
This book is intended for developers who want to use features of the Kivy framework and develop multitouch applications. Prior experience with Kivy is not required although familiarity with Python is expected.
In this book, you will find several headings that appear frequently (Getting ready, How to do it, How it works, There's more, and See also).
To give clear instructions on how to complete a recipe, we use these sections as follows:
This section tells you what to expect in the recipe, and describes how to set up any software or any preliminary settings required for the recipe.
This section usually consists of a detailed explanation of what happened in the previous section.
This section consists of additional information about the recipe in order to make the reader more knowledgeable about the recipe.
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.
Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "We are using again our KV file with a simple button and empty label with ID button1 and label1 respectively"
A block of code is set as follows:
<MyW>:
Button:
id: button1
text: 'Hello'
on_press: root.animate(button1)When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
canvas.after: PopMatrix
Any command-line input or output is written as follows:
$ Kivy pyinstaller.py --windowed --name e1 /Users/Me/Documents/e1app/e1.py
New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "We are going to use one simple Python files that will just show our Hello World text"
Feedback from our readers is always welcome. Let us know what you think about this book—what you liked or disliked. Reader feedback is important for us as it helps us develop titles that you will really get the most out of.
To send us general feedback, simply e-mail <[email protected]>, and mention the book's title in the subject of your message.
If there is a topic that you have expertise in and you are interested in either writing or contributing to a book, see our author guide at www.packtpub.com/authors.
Now that you are the proud owner of a Packt book, we have a number of things to help you to get the most from your purchase.
You can download the example code files from your account at http://www.packtpub.com for all the Packt Publishing books you have purchased. If you purchased this book elsewhere, you can visit http://www.packtpub.com/support and register to have the files e-mailed directly to you.
Although we have taken every care to ensure the accuracy of our content, mistakes do happen. If you find a mistake in one of our books—maybe a mistake in the text or the code—we would be grateful if you could report this to us. By doing so, you can save other readers from frustration and help us improve subsequent versions of this book. If you find any errata, please report them by visiting http://www.packtpub.com/submit-errata, selecting your book, clicking on the Errata Submission Form link, and entering the details of your errata. Once your errata are verified, your submission will be accepted and the errata will be uploaded to our website or added to any list of existing errata under the Errata section of that title.
To view the previously submitted errata, go to https://www.packtpub.com/books/content/support and enter the name of the book in the search field. The required information will appear under the Errata section.
Piracy of copyrighted material on the Internet is an ongoing problem across all media. At Packt, we take the protection of our copyright and licenses very seriously. If you come across any illegal copies of our works in any form on the Internet, please provide us with the location address or website name immediately so that we can pursue a remedy.
Please contact us at <[email protected]> with a link to the suspected pirated material.
We appreciate your help in protecting our authors and our ability to bring you valuable content.
If you have a problem with any aspect of this book, you can contact us at <[email protected]>, and we will do our best to address the problem.