From 30cd80d03b0064e632505a76e9593a23552b9b4d Mon Sep 17 00:00:00 2001
From: jess <jess@else-if.org>
Date: Thu, 2 Apr 2026 18:13:44 -0700
Subject: [PATCH] wire peak markers into VoltammogramPlot with color-coded
 rendering and labels

---
 cue/src/plot.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/cue/src/plot.rs b/cue/src/plot.rs
index 0023fb2..7d3de74 100644
--- a/cue/src/plot.rs
+++ b/cue/src/plot.rs
@@ -3,6 +3,7 @@ use iced::{Color, Point, Rectangle, Renderer, Theme};
 use iced::mouse;
 
 use crate::app::Message;
+use crate::lsv_analysis::{LsvPeak, PeakKind};
 use crate::protocol::{AmpPoint, ClPoint, EisPoint, LsvPoint};
 
 const MARGIN_L: f32 = 55.0;
@@ -823,6 +824,7 @@ pub struct VoltammogramState {
 pub struct VoltammogramPlot<'a> {
     pub points: &'a [LsvPoint],
     pub reference: Option<&'a [LsvPoint]>,
+    pub peaks: &'a [LsvPeak],
 }
 
 impl VoltammogramPlot<'_> {
@@ -983,6 +985,24 @@ impl<'a> canvas::Program<Message> for VoltammogramPlot<'a> {
         draw_polyline(&mut frame, &pts, COL_LSV, 2.0);
         draw_dots(&mut frame, &pts, COL_LSV, 2.5);
 
+        for peak in self.peaks {
+            let px = lerp(peak.v_mv, xv.lo, xv.hi, xl, xr);
+            let py = lerp(peak.i_ua, yv.hi, yv.lo, yt, yb);
+            if !px.is_finite() || !py.is_finite() { continue; }
+            let col = match peak.kind {
+                PeakKind::FreeCl => COL_CL_FREE,
+                PeakKind::TotalCl => COL_CL_TOTAL,
+                PeakKind::Crossover => COL_FIT_PT,
+            };
+            frame.fill(&Path::circle(Point::new(px, py), 5.0), col);
+            let label = match peak.kind {
+                PeakKind::FreeCl => format!("Free {:.0}mV {:.2}uA", peak.v_mv, peak.i_ua),
+                PeakKind::TotalCl => format!("Total {:.0}mV {:.2}uA", peak.v_mv, peak.i_ua),
+                PeakKind::Crossover => format!("X-over {:.0}mV", peak.v_mv),
+            };
+            dt(&mut frame, Point::new(px - 20.0, py + 8.0), &label, col, 10.0);
+        }
+
         if let Some(pos) = cursor.position_in(bounds) {
             if pos.x >= xl && pos.x <= xr && pos.y >= yt && pos.y <= yb {
                 let v = lerp(pos.x, xl, xr, xv.lo, xv.hi);