Introducing the Fyne GUI toolkit for building performant cross platform apps quickly and easily

1. Andrew Williams
@andydotxyz
Platform Agnostic
apps are Fyne
RWC Symposium
15 November 2019

2. Andrew Williams
@andydotxyz
Why another GUI toolkit?
● Current challenges:
● Legacy technologies and old thinking
● Steep learning curve
● Supporting multiple platforms is difficult
● To be the best toolkit for easily developing beautiful, native
graphical applications across all platforms.

3. Andrew Williams
@andydotxyz
Design
● API
● Idiomatic and self-documenting
● Clean and simple design, extensible
● UI
● Material design inspired, vector throughout
● Light and dark themes, consistent UX
● No runtime dependencies!

4. Andrew Williams
@andydotxyz
Architecture
● Heirarchy:
Canvas, CanvasObject, Container, Widget
● Packages
● canvas
● layout
● widget
● app
● test

5. Andrew Williams
@andydotxyz
Widgets & Demo

6. Andrew Williams
@andydotxyz
Also in Light

7. Andrew Williams
@andydotxyz
Hello World!
package main
import "fyne.io/fyne/app"
import "fyne.io/fyne/widget"
func main() {
a := app.New()
w := a.NewWindow("Hello")
w.SetContent(
widget.NewLabel("Hello Fyne!"),
)
w.ShowAndRun()
}

8. Andrew Williams
@andydotxyz
Building your first app
$ go get fyne.io/fyne
$ mkdir project; cd project
$ vim ui.go
$ go run ui.go
$ vim ui_test.go
$ go test *.go

9. Andrew Williams
@andydotxyz
Packaging
$ go get fyne.io/fyne/cmd/fyne
$ fyne package .
$ ls
myapp.go myapp.app
$ fyne package -os linux
$ ls
myapp.go myapp.app myapp.tar.gz
$ fyne install .

10. Andrew Williams
@andydotxyz
And now for mobile...
$ fyne package -os android
$ ls
myapp.go myapp.apk
$ fyne package -os iOS -appID com.myco.appname
$ ls
myapp.go myapp.app
$ adb install myapp.apk
$ xcrun simctl install booted myapp.app

11. Andrew Williams
@andydotxyz
Devices

12. Andrew Williams
@andydotxyz
Fyne applications

13. Andrew Williams
@andydotxyz
Back to the Future
● To be the best toolkit for easily developing beautiful,
native graphical applications across all platforms.
● 1.2 Release in November
Mobile, data binding, widget extension
● 2.0 Release in 2020
GUI editor, storage sync, multimedia
● Lots of apps…

14. Andrew Williams
@andydotxyz
Questions?
● https://tour.fyne.io
Get started developing with Fyne
● https://fyne.io/develop
Documentation for developers
● https://youtube.com/channel/UC_TJ5sWEIKzUyWfF4AXTi5g
Tutorial videos
● https://github.com/fyne-io/fyne/
Contributing to the toolkit
● https://conf.fyne.io/
Details of our online conference – 22 Nov