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

Grouping with the collection widgets

In this section, we will look at widgets that are designed to efficiently contain main widgets. Some of the widgets mentioned in the previous section do this, such as Form and Toolbar, but collection widgets support thousands of items (though they’re not all visible at one time). These widgets are commonly used for displaying a huge numbers of options or navigating complex datasets.

Due to the requirement that collection widgets only show large amounts of data, they are designed to only show a small portion of the possible widget at a time. To do this, and to maintain great performance, they have a caching mechanism that makes their API a little more complex than the widgets we have seen previously.

Callbacks

Each of these widgets relies on a number of callback functions. The first of these functions will provide information on the dimensions of the data that the widget will display (for a more complete discussion on data, see Chapter...