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//! Example: Advanced event listener (all event types)
//!
//! What it demonstrates
//! - Subscribing to every event kind with [`EventFilter::all()`].
//! - Printing detailed metadata for each event category.
//! - Handling click, double-click, measurement, zoom, pan, fit-to-view,
//! resize, key-press, data-update, pause/resume, scope add/remove,
//! trace show/hide, colour change, math trace, threshold, export,
//! and screenshot events.
//!
//! How to run
//! ```bash
//! cargo run --example events_advanced
//! ```
//! Interact with the plot (click, scroll, press keys, add measurements, etc.)
//! and watch the events stream in the terminal.
use liveplot::{
channel_plot, run_liveplot, EventController, EventFilter, EventKind, LivePlotConfig, PlotPoint,
};
use std::time::{Duration, SystemTime, UNIX_EPOCH};
fn main() -> eframe::Result<()> {
// Subscribe to ALL events.
let event_ctrl = EventController::new();
let rx = event_ctrl.subscribe(EventFilter::all());
// Background thread: pretty-print every event.
std::thread::spawn(move || {
while let Ok(evt) = rx.recv() {
let k = evt.kinds;
// ── Click / Double-click ──────────────────────────────────────
if k.contains(EventKind::CLICK) || k.contains(EventKind::DOUBLE_CLICK) {
let label = if k.contains(EventKind::DOUBLE_CLICK) {
"DOUBLE_CLICK"
} else {
"CLICK"
};
if let Some(c) = &evt.click {
// coordinates are optional but should exist for click events
let (px, py) = if let Some(p) = c.plot_pos {
(p.x, p.y)
} else {
(f64::NAN, f64::NAN)
};
let (sx, sy) = if let Some(s) = c.screen_pos {
(s.x, s.y)
} else {
(f32::NAN, f32::NAN)
};
println!(
"[{label}] plot=({:.4},{:.4}) screen=({:.1},{:.1}) scope={}",
px,
py,
sx,
sy,
c.scope_id.map_or("?".into(), |id| id.to_string()),
);
} else {
println!("[{label}]");
}
}
// ── Pause / Resume ────────────────────────────────────────────
if k.contains(EventKind::PAUSE) || k.contains(EventKind::RESUME) {
let label = if k.contains(EventKind::RESUME) {
"RESUME"
} else {
"PAUSE"
};
if let Some(p) = &evt.pause {
println!("[{label}] scope={}", p.scope_id.unwrap_or(0));
} else {
println!("[{label}]");
}
}
// ── Zoom / Pan / Fit-to-View ──────────────────────────────────
if k.contains(EventKind::ZOOM)
|| k.contains(EventKind::PAN)
|| k.contains(EventKind::FIT_TO_VIEW)
{
let label = if k.contains(EventKind::FIT_TO_VIEW) {
"FIT_TO_VIEW"
} else if k.contains(EventKind::ZOOM) {
"ZOOM"
} else {
"PAN"
};
if let Some(v) = &evt.view_change {
println!(
"[{label}] x={:?} y={:?} scope={}",
v.x_range,
v.y_range,
v.scope_id.map_or("?".into(), |id| id.to_string()),
);
} else {
println!("[{label}]");
}
}
// ── Measurement ───────────────────────────────────────────────
if k.contains(EventKind::MEASUREMENT_POINT) {
let complete = k.contains(EventKind::MEASUREMENT_COMPLETE);
if let Some(m) = &evt.measurement {
println!(
"[MEASUREMENT{}] name={:?} point=({:.4},{:.4}) p1={:?} p2={:?} slope={:?} dist={:?}",
if complete { " COMPLETE" } else { "" },
m.measurement_name,
m.point[0], m.point[1],
m.p1, m.p2, m.slope, m.distance,
);
}
}
if k.contains(EventKind::MEASUREMENT_CLEARED) {
println!("[MEASUREMENT_CLEARED]");
}
// ── Resize ────────────────────────────────────────────────────
if k.contains(EventKind::RESIZE) {
if let Some(r) = &evt.resize {
println!("[RESIZE] {}×{}", r.width as u32, r.height as u32);
}
}
// ── Key press ─────────────────────────────────────────────────
if k.contains(EventKind::KEY_PRESSED) {
if let Some(kp) = &evt.key_press {
println!(
"[KEY] {:?} ctrl={} alt={} shift={} cmd={}",
kp.key,
kp.modifiers.ctrl,
kp.modifiers.alt,
kp.modifiers.shift,
kp.modifiers.command,
);
}
}
// ── Data update ───────────────────────────────────────────────
if k.contains(EventKind::DATA_UPDATED) {
if let Some(d) = &evt.data_update {
println!("[DATA_UPDATED] traces={:?}", d.traces);
}
}
// ── Trace visibility / colour / offset ────────────────────────
if k.contains(EventKind::TRACE_SHOWN) || k.contains(EventKind::TRACE_HIDDEN) {
if let Some(t) = &evt.trace {
println!(
"[TRACE_{}] {:?} visible={:?}",
if k.contains(EventKind::TRACE_SHOWN) {
"SHOWN"
} else {
"HIDDEN"
},
t.trace.0,
t.visible,
);
}
}
if k.contains(EventKind::TRACE_COLOR_CHANGED) {
if let Some(t) = &evt.trace {
println!("[TRACE_COLOR] {:?} rgb={:?}", t.trace.0, t.color_rgb);
}
}
if k.contains(EventKind::TRACE_OFFSET_CHANGED) {
if let Some(t) = &evt.trace {
println!("[TRACE_OFFSET] {:?} offset={:?}", t.trace.0, t.offset);
}
}
// ── Math trace ────────────────────────────────────────────────
if k.contains(EventKind::MATH_TRACE_ADDED) {
if let Some(m) = &evt.math_trace {
println!("[MATH_TRACE_ADDED] {:?} formula={:?}", m.name, m.formula);
}
}
if k.contains(EventKind::MATH_TRACE_REMOVED) {
if let Some(m) = &evt.math_trace {
println!("[MATH_TRACE_REMOVED] {:?}", m.name);
}
}
// ── Threshold ─────────────────────────────────────────────────
if k.contains(EventKind::THRESHOLD_EXCEEDED) {
if let Some(t) = &evt.threshold {
println!(
"[THRESHOLD_EXCEEDED] {:?} trace={:?} area={:?}",
t.threshold_name, t.trace, t.area,
);
}
}
if k.contains(EventKind::THRESHOLD_REMOVED) {
if let Some(t) = &evt.threshold {
println!("[THRESHOLD_REMOVED] {:?}", t.threshold_name);
}
}
// ── Export / Screenshot ───────────────────────────────────────
if k.contains(EventKind::EXPORT) || k.contains(EventKind::SCREENSHOT) {
let label = if k.contains(EventKind::SCREENSHOT) {
"SCREENSHOT"
} else {
"EXPORT"
};
if let Some(e) = &evt.export {
println!("[{label}] format={:?} path={:?}", e.format, e.path);
}
}
// ── Scope management ──────────────────────────────────────────
if k.contains(EventKind::SCOPE_ADDED) {
if let Some(s) = &evt.scope_manage {
println!("[SCOPE_ADDED] id={}", s.scope_id);
}
}
if k.contains(EventKind::SCOPE_REMOVED) {
if let Some(s) = &evt.scope_manage {
println!("[SCOPE_REMOVED] id={}", s.scope_id);
}
}
}
println!("[event] channel closed");
});
// Set up a sine + cosine trace so there is data to interact with.
let (sink, data_rx) = channel_plot();
let t_sin = sink.create_trace("sin", Some("Sine"));
let t_cos = sink.create_trace("cos", Some("Cosine"));
std::thread::spawn(move || {
let dt = Duration::from_millis(1);
loop {
let t_s = SystemTime::now()
.duration_since(UNIX_EPOCH)
.map(|d| d.as_secs_f64())
.unwrap_or(0.0);
let _ = sink.send_point(
&t_sin,
PlotPoint {
x: t_s,
y: (2.0 * std::f64::consts::PI * 2.0 * t_s).sin(),
},
);
let _ = sink.send_point(
&t_cos,
PlotPoint {
x: t_s,
y: (2.0 * std::f64::consts::PI * 2.0 * t_s).cos(),
},
);
std::thread::sleep(dt);
}
});
let mut cfg = LivePlotConfig::default();
cfg.controllers.event = Some(event_ctrl);
run_liveplot(data_rx, cfg)
}