Book Image

Building Cross-Platform GUI Applications with Fyne

By : Andrew Williams
5 (1)
Book Image

Building Cross-Platform GUI Applications with Fyne

5 (1)
By: Andrew Williams

Overview of this book

The history of graphical application development is long and complicated, with various development challenges that persist to this day. The mix of technologies involved and the need to use different programming languages led to a very steep learning curve for developers looking to build applications across multiple platforms. In Building Cross-Platform GUI Applications with Fyne, you'll understand how the Go language, when paired with a modern graphical toolkit such as Fyne, can overcome these issues and make application development much easier. To provide an easy-to-use framework for cross-platform app development, the Fyne project offers many graphical concepts and design principles that are outlined throughout this book. By working through five example projects, you'll learn how to build apps effectively, focusing on each of the main areas, including the canvas, layouts, file handling, widgets, data binding, and themes. The book will also show you how the completed applications can then be run on your desktop computer, laptop, and smartphone. After completing these projects, you will discover how to prepare applications for release and distribute them to platform marketplaces and app stores. By the end of this book, you'll be able to create cross-platform graphical applications with visually appealing user interfaces and concise code.
Table of Contents (18 chapters)
1
Section 1: Why Fyne? The Reason for Being and a Vision of the Future
4
Section 2: Components of a Fyne App
10
Section 3: Packaging and Distribution

Adapting data types for display

In the example we worked through in the previous section, we learned that it's possible to bind the same value to different widgets since both Slider and ProgressBar expect a Float value for their data. However, it is not always the case that these data types will align perfectly. Sometimes, we will need to perform conversions to connect to the widgets we wish to use. In this section, we will explore how to do so, starting with how we can include a label in the preceding example.

Formatting types into strings

In many applications, it is common to use a Label or other string-based display to contain information in another format, such as an int or float64. With data bindings, this is no different, so the binding package provides conversion functions that can make this adaptation easy.

To follow on from the previous example, we could include a Label that displays the float64 value, but to do so, we would need a String binding rather than...