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#tkinter

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Varbin :arctic_fox: ​:gay_furr:

So... I wanted to package my Python app using tkinter UI library (it is just good enough for my purpose) as a flatpak. Flatpaks are based on "runtimes" similar to docker base images.

As I did obviously not use any "big" UI framework (Gnome or KDE) and it already provides Python with tkinter, I decided to use the org.freedesktop.Platform as a runtime for my flatpak. The first challenge was to get the dbus-python package to compile, as it requires a dbus binary for compiling it. So I added the freedesktop DBus implementation. I need dbus functionallity, as it allows me to use the "XDG Desktop Portals" to interactively open files when running in the flatpak sandbox. After this, everything worked! :neocat_happy:

Unfortunately, the application cannot load any proper font, so it falls back to the 90s era fonts compiled statically into Tcl/Tk (which tkinter is based on). After some trial and error, and finding out how add custom fonts to Tk, I disovered that the freedesktop runtime does not ship freedesktop fontconfig. And also I can't add it that easily to the build step, too, as the bundled Tk installation does not link to it anyway… :neocat_angry:

#flatpak#freedesktop#tkinter
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Kernel Bob

Now I have a working app. The table in the first screen capture is compiled into the Teensy. A Tkinter app on my Mac reads it and generates the UI in the second screen capture. All the controls change the sound in real time.

I can make several good drum sounds, and it's just a matter of tweaking them. The reverb sounds like a walkie-talkie in a bucket, though. I may have introduced a bug...

🧵 10/∞

A C static array initializer. It defines five data for each of four parameters controlling a snare drum.
A Tkinter app. It has 21 sliders in four groups, each with a numeric value below. The first group matches the four described in the C code in the other screen capture. Below the sliders are a log window and a quit button.
#BirthdayTower#tkinter#python
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Kernel Bob

I didn't find anything that would make it easy, so I started writing a UI from scratch. I spent a few hours in tkinter and knocked out a sketch of what I'm thinking of.

tkinter is weird. But it's mature and reasonably well documented.

Now I'll need to write a little bidirectional serial protocol so the Teensy can tell me what actual parameters it has and this UI can tell the Teensy when to change them.

🧵 9/∞

Screen capture of a MacOS tkinter app. It has two sets of sliders across the top, a large log window across the bottom, and a quit button in the middle. The first set of sliders is echo, and the sliders are time and amount. The second set is reverb, and the sliders are time, density, and wetdry (sic).
#BirthdayTower#tkinter#python
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