Discarding photo fails with Go and Fyne

If you want to keep only the good photos from your digital collection, you have to find and delete the fails. Mike Schilli writes a graphical application with Go and the Fyne framework to help you cull your photo library.

Command-line programs in Go are all well and good, but every now and then you need a native desktop app with a GUI, for example, to display the photos you downloaded from your phone and sort out and ditch the fails. At the end of the day, only a few of the hundreds of photos on your phone will be genuinely worth keeping.

Three years ago, I looked at a graphical tool – very similar to the one discussed in this article – that let the user manually weed out bad photos [1]. It ran on the Electron framework to remote control a Chrome browser via Node.js. Recently, the Go GUI framework Fyne has set its sights on competing with Electron and dominating the world of cross-platform GUI development. In this issue, I’ll take a look at how easy it is to write a photo fail killer in Go and Fyne.

Recently, ADMIN, a sister publication of Linux Magazine, featured some simple examples [2] with Fyne, but a real application requires some additional polish. Listing 1 [3] shows my first attempt at a photo app that reads a JPEG image from disk and displays it in a window along with a Quit button. The photo dates back to my latest tour of Germany in 2021, where I set out to track down Germany’s best pretzel bakers between Bremen and Bad Tölz. Figure 1 shows the app shortly after being called from the command line with a fabulous pretzel from Lenggries on the southernmost edge of Germany. My only complaint about the app’s presentation with the photo and the Quit button is that it takes a good two seconds to load a picture from a cellphone camera with a 4032×3024 resolution from the disk and display it in the application window. Building a tool for image sorting with sluggish handling like this wouldn’t attract a huge user base.


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