Enum Rate 

pub enum Rate {
    Quarter,
    Eighth,
    Sixteenth,
    ThirtySecond,
    EighthTriplet,
    SixteenthTriplet,
}

How long one step lasts, as a musical division.

An enum rather than the raw tick count so that a rate cannot be a number nothing plays at, and rather than a u8 index so that a session or a UI cannot hand the audio thread a rate that does not exist. Ticks per step at 960 PPQ are exact for every entry, triplets included — 960 divides by 3.

Variants

Quarter

Eighth

Sixteenth

ThirtySecond

EighthTriplet

SixteenthTriplet

Implementations

impl Rate

pub const ALL: [Rate; 6]

Every rate, in the order the UI steps through them.

pub const fn ticks(self) -> i64

Ticks one step lasts at 960 PPQ.

pub const fn label(self) -> &'static str

pub const fn index(self) -> u8

Position in Rate::ALL. What a session stores, so it is stable.

pub fn from_index(index: u8) -> Self

The rate at index, or the default for anything out of range — a session written by a later build names a rate this one does not have, and a pattern at the wrong rate is better than a pattern that will not load.

pub fn stepped(self, delta: i32) -> Self

One step up or down the list, stopping at the ends.

Trait Implementations

impl Clone for Rate

fn clone(&self) -> Rate

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Rate

impl Debug for Rate

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Rate

fn default() -> Rate

Returns the “default value” for a type.

impl Eq for Rate

impl PartialEq for Rate

fn eq(&self, other: &Rate) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Rate