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//! Data ingestion and trace bookkeeping for the multi-trace oscilloscope.
//!
//! This module hosts the non-UI pieces of `LivePlotApp`:
//! - receiving samples and maintaining per-trace buffers
//! - creating traces on first sighting and assigning distinct colors
//! - pruning by time window to keep memory bounded
//! - publishing snapshots to external controllers
//! - convenience setters for fixed datasets
use egui::Color32;
use std::collections::VecDeque;
use std::time::Duration;
use crate::controllers::{TraceInfo, TracesInfo};
use crate::sink::PlotCommand;
use super::trace_look::TraceLook;
use super::types::TraceState;
use super::LivePlotApp;
impl LivePlotApp {
/// Directly set/replace the sample buffer for a named trace.
///
/// The provided points are absolute `[t_seconds, value]` pairs. The trace is created if
/// absent, a snapshot is taken, the app is paused, and auto-fit for both axes is requested.
pub fn set_trace_data<S: Into<String>>(&mut self, name: S, points: Vec<[f64; 2]>) {
let name = name.into();
// Create trace if missing
let is_new = !self.traces.contains_key(&name);
let idx = self.trace_order.len();
let entry = self.traces.entry(name.clone()).or_insert_with(|| {
self.trace_order.push(name.clone());
let mut look = TraceLook::default();
look.color = Self::alloc_color(idx);
TraceState {
name: name.clone(),
look,
offset: 0.0,
live: VecDeque::new(),
snap: None,
last_fft: None,
is_math: false,
info: String::new(),
}
});
// Replace buffers
entry.live = points.iter().copied().collect();
entry.snap = Some(entry.live.clone());
// Select first trace if none selected yet
if is_new && self.selection_trace.is_none() {
self.selection_trace = Some(name);
}
// Show fixed data without scrolling/pruning
self.paused = true;
// Request auto-fit to the provided data
self.pending_auto_x = true;
self.pending_auto_y = true;
}
/// Convenience: set/replace multiple traces at once.
pub fn set_traces_data(&mut self, data: Vec<(String, Vec<[f64; 2]>)>) {
for (name, pts) in data {
self.set_trace_data(name, pts);
}
self.paused = true;
self.pending_auto_x = true;
self.pending_auto_y = true;
}
/// Drain incoming commands and append to per-trace buffers. Create traces on registration.
pub(super) fn drain_rx_and_update_traces(&mut self) {
while let Ok(cmd) = self.rx.try_recv() {
match cmd {
PlotCommand::RegisterTrace { id, name, info } => {
// Map ID to name for future lookups
self.id_to_name.insert(id, name.clone());
// Create trace state if missing
let is_new = !self.traces.contains_key(&name);
let entry = self.traces.entry(name.clone()).or_insert_with(|| {
let idx = self.trace_order.len();
self.trace_order.push(name.clone());
let mut look = TraceLook::default();
look.color = Self::alloc_color(idx);
TraceState {
name: name.clone(),
look,
offset: 0.0,
live: VecDeque::new(),
snap: None,
last_fft: None,
is_math: false,
info: String::new(),
}
});
if let Some(inf) = info.as_ref() {
entry.info = inf.clone();
}
if is_new && self.selection_trace.is_none() {
self.selection_trace = Some(name);
}
}
PlotCommand::Point { trace_id, point } => {
if let Some(name) = self.id_to_name.get(&trace_id).cloned() {
let entry = self.traces.entry(name.clone()).or_insert_with(|| {
let idx = self.trace_order.len();
self.trace_order.push(name.clone());
let mut look = TraceLook::default();
look.color = Self::alloc_color(idx);
TraceState {
name: name.clone(),
look,
offset: 0.0,
live: VecDeque::new(),
snap: None,
last_fft: None,
is_math: false,
info: String::new(),
}
});
entry.live.push_back([point.x, point.y]);
if entry.live.len() > self.max_points {
entry.live.pop_front();
}
} else {
// If not registered, synthesize a name and register implicitly
let name = format!("trace-{}", trace_id);
self.id_to_name.insert(trace_id, name.clone());
let idx = self.trace_order.len();
self.trace_order.push(name.clone());
let mut look = TraceLook::default();
look.color = Self::alloc_color(idx);
let mut state = TraceState {
name: name.clone(),
look,
offset: 0.0,
live: VecDeque::new(),
snap: None,
last_fft: None,
is_math: false,
info: String::new(),
};
state.live.push_back([point.x, point.y]);
self.traces.insert(name.clone(), state);
if self.selection_trace.is_none() {
self.selection_trace = Some(name);
}
}
}
PlotCommand::Points { trace_id, points } => {
if let Some(name) = self.id_to_name.get(&trace_id).cloned() {
let entry = self.traces.entry(name.clone()).or_insert_with(|| {
let idx = self.trace_order.len();
self.trace_order.push(name.clone());
let mut look = TraceLook::default();
look.color = Self::alloc_color(idx);
TraceState {
name: name.clone(),
look,
offset: 0.0,
live: VecDeque::new(),
snap: None,
last_fft: None,
is_math: false,
info: String::new(),
}
});
for p in points {
entry.live.push_back([p.x, p.y]);
if entry.live.len() > self.max_points {
entry.live.pop_front();
}
}
} else {
// Implicit registration path
let name = format!("trace-{}", trace_id);
self.id_to_name.insert(trace_id, name.clone());
let idx = self.trace_order.len();
self.trace_order.push(name.clone());
let mut look = TraceLook::default();
look.color = Self::alloc_color(idx);
let mut state = TraceState {
name: name.clone(),
look,
offset: 0.0,
live: VecDeque::new(),
snap: None,
last_fft: None,
is_math: false,
info: String::new(),
};
for p in points {
state.live.push_back([p.x, p.y]);
if state.live.len() > self.max_points {
state.live.pop_front();
}
}
self.traces.insert(name.clone(), state);
if self.selection_trace.is_none() {
self.selection_trace = Some(name);
}
}
}
PlotCommand::SetPointsY {
trace_id,
mut xs,
y,
} => {
if let Some(name) = self.id_to_name.get(&trace_id).cloned() {
if let Some(entry) = self.traces.get_mut(&name) {
// Sort X list for binary search membership checks
xs.sort_by(|a, b| {
a.partial_cmp(b).unwrap_or(std::cmp::Ordering::Equal)
});
for p in entry.live.iter_mut() {
if xs
.binary_search_by(|probe| probe.partial_cmp(&p[0]).unwrap())
.is_ok()
{
p[1] = y;
}
}
}
}
}
PlotCommand::DeletePointsX { trace_id, mut xs } => {
if let Some(name) = self.id_to_name.get(&trace_id).cloned() {
if let Some(entry) = self.traces.get_mut(&name) {
xs.sort_by(|a, b| {
a.partial_cmp(b).unwrap_or(std::cmp::Ordering::Equal)
});
entry.live.retain(|p| {
xs.binary_search_by(|probe| probe.partial_cmp(&p[0]).unwrap())
.is_err()
});
}
}
}
PlotCommand::DeleteXRange {
trace_id,
x_min,
x_max,
} => {
if let Some(name) = self.id_to_name.get(&trace_id).cloned() {
if let Some(entry) = self.traces.get_mut(&name) {
// If either bound is NaN, interpret as start/end of the data vector.
if entry.live.is_empty() {
continue;
}
let min_x = entry.live.front().map(|p| p[0]).unwrap();
let max_x = entry.live.back().map(|p| p[0]).unwrap();
let lo_in = if x_min.is_nan() { min_x } else { x_min };
let hi_in = if x_max.is_nan() { max_x } else { x_max };
let (lo, hi) = if lo_in <= hi_in {
(lo_in, hi_in)
} else {
(hi_in, lo_in)
};
entry.live.retain(|p| p[0] < lo || p[0] > hi);
}
}
}
PlotCommand::ApplyYFnAtX {
trace_id,
mut xs,
f,
} => {
if let Some(name) = self.id_to_name.get(&trace_id).cloned() {
if let Some(entry) = self.traces.get_mut(&name) {
xs.sort_by(|a, b| {
a.partial_cmp(b).unwrap_or(std::cmp::Ordering::Equal)
});
for p in entry.live.iter_mut() {
if xs
.binary_search_by(|probe| probe.partial_cmp(&p[0]).unwrap())
.is_ok()
{
p[1] = f(p[1]);
}
}
}
}
}
PlotCommand::ApplyYFnInXRange {
trace_id,
x_min,
x_max,
f,
} => {
if let Some(name) = self.id_to_name.get(&trace_id).cloned() {
if let Some(entry) = self.traces.get_mut(&name) {
if entry.live.is_empty() {
continue;
}
let min_x = entry.live.front().map(|p| p[0]).unwrap();
let max_x = entry.live.back().map(|p| p[0]).unwrap();
let lo_in = if x_min.is_nan() { min_x } else { x_min };
let hi_in = if x_max.is_nan() { max_x } else { x_max };
let (lo, hi) = if lo_in <= hi_in {
(lo_in, hi_in)
} else {
(hi_in, lo_in)
};
for p in entry.live.iter_mut() {
if p[0] >= lo && p[0] <= hi {
p[1] = f(p[1]);
}
}
}
}
}
PlotCommand::ClearData { trace_id } => {
if let Some(name) = self.id_to_name.get(&trace_id).cloned() {
if let Some(entry) = self.traces.get_mut(&name) {
entry.live.clear();
if let Some(s) = &mut entry.snap {
s.clear();
}
}
}
}
PlotCommand::SetData { trace_id, points } => {
// Replace the entire buffer for this trace with the provided points.
if let Some(name) = self.id_to_name.get(&trace_id).cloned() {
// Ensure the trace exists
let idx = self.trace_order.len();
let entry = self.traces.entry(name.clone()).or_insert_with(|| {
self.trace_order.push(name.clone());
let mut look = TraceLook::default();
look.color = Self::alloc_color(idx);
TraceState {
name: name.clone(),
look,
offset: 0.0,
live: VecDeque::new(),
snap: None,
last_fft: None,
is_math: false,
info: String::new(),
}
});
entry.live.clear();
entry.live.extend(points.iter().map(|p| [p.x, p.y]));
entry.snap = Some(entry.live.clone());
// Show fixed data without scrolling/pruning
self.paused = true;
// Request auto-fit to the provided data
self.pending_auto_x = true;
self.pending_auto_y = true;
if self.selection_trace.is_none() {
self.selection_trace = Some(name);
}
} else {
// Implicit registration path: synthesize a name and register the id
let name = format!("trace-{}", trace_id);
self.id_to_name.insert(trace_id, name.clone());
let idx = self.trace_order.len();
self.trace_order.push(name.clone());
let mut look = TraceLook::default();
look.color = Self::alloc_color(idx);
let mut state = TraceState {
name: name.clone(),
look,
offset: 0.0,
live: VecDeque::new(),
snap: None,
last_fft: None,
is_math: false,
info: String::new(),
};
state.live.extend(points.iter().map(|p| [p.x, p.y]));
state.snap = Some(state.live.clone());
self.traces.insert(name.clone(), state);
if self.selection_trace.is_none() {
self.selection_trace = Some(name);
}
self.paused = true;
self.pending_auto_x = true;
self.pending_auto_y = true;
}
}
}
}
}
/// Prune each live buffer by a margin beyond the visible window to cap memory.
pub(super) fn prune_by_time_window(&mut self) {
if self.last_prune.elapsed() > Duration::from_millis(200) {
for (_k, tr) in self.traces.iter_mut() {
if let Some((&[t_latest, _], _)) = tr.live.back().map(|x| (x, ())) {
let cutoff = t_latest - self.time_window * 1.15;
while let Some(&[t, _]) = tr.live.front() {
if t < cutoff {
tr.live.pop_front();
} else {
break;
}
}
}
}
self.last_prune = std::time::Instant::now();
}
}
/// Compute latest overall time across traces respecting paused state.
pub(super) fn latest_time_overall(&self) -> Option<f64> {
let mut t_latest_overall = f64::NEG_INFINITY;
for name in self.trace_order.iter() {
if let Some(tr) = self.traces.get(name) {
let last_t = if self.paused {
tr.snap.as_ref().and_then(|s| s.back()).map(|p| p[0])
} else {
tr.live.back().map(|p| p[0])
};
if let Some(t) = last_t {
if t > t_latest_overall {
t_latest_overall = t;
}
}
}
}
if t_latest_overall.is_finite() {
Some(t_latest_overall)
} else {
None
}
}
/// Apply trace controller requests and publish snapshot to listeners.
pub(super) fn apply_traces_controller_requests_and_publish(&mut self) {
if let Some(ctrl) = &self.traces_controller {
// Apply incoming requests first
{
let mut inner = ctrl.inner.lock().unwrap();
for (name, rgb) in inner.color_requests.drain(..) {
if let Some(tr) = self.traces.get_mut(&name) {
tr.look.color = Color32::from_rgb(rgb[0], rgb[1], rgb[2]);
}
}
for (name, vis) in inner.visible_requests.drain(..) {
if let Some(tr) = self.traces.get_mut(&name) {
tr.look.visible = vis;
}
}
for (name, off) in inner.offset_requests.drain(..) {
if let Some(tr) = self.traces.get_mut(&name) {
tr.offset = off;
}
}
if let Some(sel) = inner.selection_request.take() {
self.selection_trace = sel;
}
if let Some(unit_opt) = inner.y_unit_request.take() {
self.y_unit = unit_opt;
}
if let Some(ylog) = inner.y_log_request.take() {
self.y_log = ylog;
}
}
// Publish snapshot
let traces: Vec<TraceInfo> = self
.trace_order
.iter()
.filter_map(|n| {
self.traces.get(n).map(|tr| TraceInfo {
name: tr.name.clone(),
color_rgb: [tr.look.color.r(), tr.look.color.g(), tr.look.color.b()],
visible: tr.look.visible,
is_math: tr.is_math,
offset: tr.offset,
})
})
.collect();
let info = TracesInfo {
traces,
marker_selection: self.selection_trace.clone(),
y_unit: self.y_unit.clone(),
y_log: self.y_log,
};
let mut inner = ctrl.inner.lock().unwrap();
inner.listeners.retain(|s| s.send(info.clone()).is_ok());
}
}
/// Allocate a visually distinct color for a given trace index.
pub(super) fn alloc_color(index: usize) -> Color32 {
// Simple distinct color palette
const PALETTE: [Color32; 10] = [
Color32::LIGHT_BLUE,
Color32::LIGHT_RED,
Color32::LIGHT_GREEN,
Color32::GOLD,
Color32::from_rgb(0xAA, 0x55, 0xFF), // purple
Color32::from_rgb(0xFF, 0xAA, 0x00), // orange
Color32::from_rgb(0x00, 0xDD, 0xDD), // cyan
Color32::from_rgb(0xDD, 0x00, 0xDD), // magenta
Color32::from_rgb(0x66, 0xCC, 0x66), // green2
Color32::from_rgb(0xCC, 0x66, 0x66), // red2
];
PALETTE[index % PALETTE.len()]
}
}