tek/src/piano/piano_h_notes.rs

use crate::*;
use super::*;

pub struct PianoHorizontalNotes<'a>(pub(crate) &'a PianoHorizontal);

render!(Tui: |self: PianoHorizontalNotes<'a>, render|{
    let time_start = self.0.time_start().get();
    let note_axis  = self.0.note_axis().get();
    let note_lo    = self.0.note_lo().get();
    let note_hi    = self.0.note_hi();
    let note_point = self.0.note_point();
    let source     = self.0.buffer.read().unwrap();
    let [x0, y0, w, h] = render.area().xywh();
    if h as usize != note_axis {
        panic!("area height mismatch: {h} <> {note_axis}");
    }
    for (area_x, screen_x) in (x0..x0+w).enumerate() {
        for (area_y, screen_y, note) in note_y_iter(note_lo, note_hi, y0) {
            let source_x = time_start + area_x;
            let source_y = note_hi    - area_y;
            // TODO: enable loop rollover:
            //let source_x = (time_start + area_x) % source.width.max(1);
            //let source_y = (note_hi    - area_y) % source.height.max(1);
            let is_in_x = source_x < source.width;
            let is_in_y = source_y < source.height;
            if is_in_x && is_in_y {
                if let Some(source_cell) = source.get(source_x, source_y) {
                    *render.buffer.get_mut(screen_x, screen_y) = source_cell.clone();
                }
            }
        }
    }
});