Feature Request: Improve unclear fingerprint registration ui
Currently the ui for registering a fingerprint makes it unclear to the user as to whether it is working. It has been a while since I have registered a fingerprint and was confused myself as to whether it was working.
When the fingerprint training dialog opens it doesn't give any feedback other than a blue flash when scanning your fingerprint. If you keep tapping your finger, you may get an error message that it could not scan your finger, but little other feedback until the training is complete or fails ultimately.
Proposed Mockups:
I do not know if there is an available differentiation between classic "slide" fingerprint scanners, and the modern "capacitive" scanners. This mockup would only apply well to "capacitive" style scanners.
In this proposed design, feedback is provided to the user as they train their fingerprint, giving them feedback even if libfprint does not provide sufficient contextual clues.
As the user continues tapping their fingerprint and Settings keeps getting a successful enrollment from libfrint artificially "fill" the fingerprint icon with color as an indication to the user how far they have progressed with their training.