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

Chapter 7: Building Custom Widgets and Themes

Over the course of the previous chapters, we have seen a lot of functionality that comes as part of the Fyne toolkit. Many applications will, however, benefit from components or functionality that are not included as standard. To be able to support an easy-to-use toolkit API and at the same time support additional functionality, the Fyne toolkit provides the ability to use custom code alongside regular widgets.

In this chapter, we will explore how custom data can be used in a Fyne app, and how custom styling can be added using code or by loading custom themes.

In this chapter, we will cover the following topics:

  • Extending existing widgets
  • Creating a component from scratch
  • Adding a custom theme

At the end of the chapter, we will see how to make use of the custom widget and theme capabilities to create an app that presents a conversation history that could be used for various instant messenger protocols. It...