We have posted many times about how Fyne is designed to be easy to learn and fast to develop with. Presentations, meetups and our own conference have discussed the topic and it remains very important to the design of the toolkit.
That said there has not been much time put in to showing how to build more than simple demo applications, so it seemed wise to rectify the imbalance.
And so in preparation for the Go developer room at FOSDEM we spent 4 hours creating a simple application. This application, PixelEdit, was designed to show how to use built in functionality, with a single custom widget to expand on the builtin components. As well as this it should have good test coverage and a well organised project showing how to keep separation of concerns in a graphical application context. And here is what 4 hours work created:
This basic user interface allows loading and saving pixel (PNG) images (using
the Go “image” library), pick colours off the canvas and draw them back on
with the pencil tool. Panning is provided by a ScrollContainer and the zooming
is implemented by wrapping the
canvas.Raster type in a custom widget.
Alongside this work a 67% code coverage was made possible by designing the code
in small components and using the
fyne.io/fyne/test utility package for
automated testing Fyne apps. And let’s not forget that this will build and run
across all the desktop and mobile platforms that Fyne supports.
You can find the full project at GitHub and
you can install it using
go get github.com/fyne-io/pixeledit.
This is launched from the command line with a file parameter to open -
once file open and save dialogs are implemented in Fyne we can improve that.
Check it out and feel free to share with us what apps you have built in surprisingly little time.
We're excited to hear from anyone interested in the project. Whether it's to find out more, provide suggestions or to get involved - drop us a line!
If you would like to join the community for a chat you'll find us in the #fyne channel on gophers Slack and Discord servers. If you are not already a member of the communities you can use a Slack invite or Discord invite.