Module preset_manager 

Preset management and transitions.

Structs

PresetManager

Preset manager handling library navigation, mode/lock/ratings, and crossfade transitions.

RatingsFile 🔒

On-disk format for ratings: a flat [ratings] table of path → integer. Stored as a String-keyed map so paths with non-UTF8 bytes degrade gracefully (skipped, never panic).

Enums

SelectionMode

Random / sequential selection. Cycled by the GUI’s R key.

TransitionState

Transition state between presets.

Constants

DEFAULT_HISTORY_SIZE

Cap for the history ring. Matches MilkDrop’s default.

DEFAULT_RATING

Default rating for an unrated preset. Picked at the middle of the [0, 5] window so unrated presets sit between user-disliked (0–2) and user-liked (4–5) when weighted-random sampling.

Functions

load_ratings 🔒

quick_random_seed 🔒

Simple wall-clock seed for the navigation RNG. The visualiser doesn’t need cryptographic randomness — frame-to-frame variation from the nanosecond clock is plenty for preset shuffling.

save_ratings 🔒