tek/tek/device/clock/clock_api.rs

use crate::*;

impl Clock {
    fn _todo_provide_u32 (&self) -> u32 {
        todo!()
    }
    fn _todo_provide_opt_u32 (&self) -> Option<u32> {
        todo!()
    }
    fn _todo_provide_f64 (&self) -> f64 {
        todo!()
    }
}

impl<T: HasClock> Command<T> for ClockCommand {
    fn execute (&self, state: &mut T) -> Perhaps<Self> {
        self.execute(state.clock_mut()) // awesome
    }
}

def_command!(ClockCommand: |clock: Clock| {
    SeekUsec   { usec:   f64 } => {
        clock.playhead.update_from_usec(*usec); Ok(None) },
    SeekSample { sample: f64 } => {
        clock.playhead.update_from_sample(*sample); Ok(None) },
    SeekPulse  { pulse:  f64 } => {
        clock.playhead.update_from_pulse(*pulse); Ok(None) },
    SetBpm     { bpm:    f64 } => Ok(Some(
        Self::SetBpm { bpm: clock.timebase().bpm.set(*bpm) })),
    SetQuant   { quant:  f64 } => Ok(Some(
        Self::SetQuant { quant: clock.quant.set(*quant) })),
    SetSync    { sync:   f64 } => Ok(Some(
        Self::SetSync { sync: clock.sync.set(*sync) })),

    Play  { position: Option<u32> } => {
        clock.play_from(*position)?; Ok(None) /* TODO Some(Pause(previousPosition)) */ },
    Pause { position: Option<u32> } => {
        clock.pause_at(*position)?; Ok(None) },

    TogglePlayback { position: u32 } => Ok(if clock.is_rolling() {
        clock.pause_at(Some(*position))?; None
    } else {
        clock.play_from(Some(*position))?; None
    }),
});