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#![cfg(feature = "fft")]
use eframe::egui;
use egui_plot::{Legend, Line, Plot, PlotPoints};
use crate::controllers::FFTPanelInfo;
use crate::fft;
use super::app::{FFTWindow, LivePlotApp};
use super::panel::{DockPanel, DockState};
#[derive(Debug, Clone)]
pub struct FFTPanel {
pub dock: DockState,
}
impl Default for FFTPanel {
fn default() -> Self {
Self {
dock: DockState::new("📊 FFT"),
}
}
}
impl DockPanel for FFTPanel {
fn dock_mut(&mut self) -> &mut DockState {
&mut self.dock
}
fn panel_contents(&mut self, app: &mut LivePlotApp, ui: &mut egui::Ui) {
// Publish current size to controller (physical px)
if let Some(ctrl) = &app.fft_controller {
let size_pts = ui.available_size();
let ppp = ui.ctx().pixels_per_point();
let size_px = [size_pts.x * ppp, size_pts.y * ppp];
let mut inner = ctrl.inner.lock().unwrap();
inner.current_size = Some(size_px);
let info = FFTPanelInfo {
shown: inner.show,
current_size: inner.current_size,
requested_size: inner.request_set_size,
};
inner.listeners.retain(|s| s.send(info.clone()).is_ok());
}
egui::CollapsingHeader::new("FFT Settings")
.default_open(true)
.show(ui, |ui| {
ui.horizontal(|ui| {
ui.label("FFT size:");
let mut size_log2 = (app.fft_size as f32).log2() as u32;
let mut changed = false;
let resp = egui::Slider::new(&mut size_log2, 8..=15).text("2^N");
if ui.add(resp).changed() {
changed = true;
}
if changed {
app.fft_size = 1usize << size_log2;
}
ui.separator();
ui.label("Window:");
egui::ComboBox::from_id_salt("fft_window_multi")
.selected_text(app.fft_window.label())
.show_ui(ui, |ui| {
for w in FFTWindow::ALL {
ui.selectable_value(&mut app.fft_window, *w, w.label());
}
});
ui.separator();
if ui
.button(if app.fft_db { "Linear" } else { "dB" })
.on_hover_text("Toggle FFT magnitude scale")
.clicked()
{
app.fft_db = !app.fft_db;
}
ui.separator();
if ui
.button("Fit into view")
.on_hover_text("Auto scale FFT axes")
.clicked()
{
app.fft_fit_view = true;
}
});
});
// Compute all FFTs (throttled)
if app.fft_last_compute.elapsed() > std::time::Duration::from_millis(100) {
for name in app.trace_order.clone().into_iter() {
if let Some(tr) = app.traces.get_mut(&name) {
tr.last_fft = fft::compute_fft(
&tr.live,
app.paused,
&tr.snap,
app.fft_size,
app.fft_window,
);
}
}
app.fft_last_compute = std::time::Instant::now();
}
// Determine overall bounds for optional fit
let mut any_spec = false;
let mut min_x = f64::INFINITY;
let mut max_x = f64::NEG_INFINITY;
let mut min_y = f64::INFINITY;
let mut max_y = f64::NEG_INFINITY;
for name in app.trace_order.clone().into_iter() {
if let Some(tr) = app.traces.get(&name) {
if let Some(spec) = &tr.last_fft {
any_spec = true;
if app.fft_db {
for p in spec.iter() {
let y = 20.0 * p[1].max(1e-12).log10();
if p[0] < min_x {
min_x = p[0];
}
if p[0] > max_x {
max_x = p[0];
}
if y < min_y {
min_y = y;
}
if y > max_y {
max_y = y;
}
}
} else {
for p in spec.iter() {
if p[0] < min_x {
min_x = p[0];
}
if p[0] > max_x {
max_x = p[0];
}
if p[1] < min_y {
min_y = p[1];
}
if p[1] > max_y {
max_y = p[1];
}
}
}
}
}
}
// Build plot and optionally include bounds
let mut plot = Plot::new("fft_plot_multi")
.legend(Legend::default())
.allow_zoom(true)
.allow_scroll(false)
.allow_boxed_zoom(true)
.y_axis_label(if app.fft_db {
"Magnitude (dB)"
} else {
"Magnitude"
})
.x_axis_label("Hz");
if app.fft_fit_view {
if min_x.is_finite() {
plot = plot.include_x(min_x).include_x(max_x);
}
if min_y.is_finite() {
plot = plot.include_y(min_y).include_y(max_y);
}
app.fft_fit_view = false; // consume request
}
let _ = plot.show(ui, |plot_ui| {
for name in app.trace_order.clone().into_iter() {
if let Some(tr) = app.traces.get(&name) {
if let Some(spec) = &tr.last_fft {
let pts: PlotPoints = if app.fft_db {
spec.iter()
.map(|p| {
let mag = p[1].max(1e-12);
let y = 20.0 * mag.log10();
[p[0], y]
})
.collect()
} else {
spec.iter().map(|p| [p[0], p[1]]).collect()
};
let line = Line::new(&tr.name, pts).color(tr.look.color);
plot_ui.line(line);
}
}
}
});
if !any_spec {
ui.label("FFT: not enough data yet");
}
}
}