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Draw the live price as a dash-dot ray across the plot.

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LWC keeps the axis label only. The overlay uses a 14-4-2-4 dash so it
does not look like a trendline.
This commit is contained in:
Chris Amow 2026-08-26 03:29:30 -05:00
parent 5708150ba3
commit 8108f2dea3
2 changed files with 28 additions and 10 deletions
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36
static/chart.js
View file

@ -206,6 +206,7 @@ class ConfluenceChart {
this.priceLines = new Map();
this.currentPriceLine = null;
this.currentPricePulse = null;
this.currentPriceRay = null;
this.projectionDiagnostic = null;
this.projectionDiagnosticFrame = null;
this.animateCurrentPrice = true;
@ -496,6 +497,12 @@ class ConfluenceChart {
this.currentPricePulse.className = 'current-price-pulse';
this.currentPricePulse.hidden = true;
el.appendChild(this.currentPricePulse);
const priceMark = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
priceMark.classList.add('current-price-mark');
priceMark.setAttribute('aria-hidden', 'true');
this.currentPriceRay = document.createElementNS('http://www.w3.org/2000/svg', 'line');
priceMark.appendChild(this.currentPriceRay);
this.overlayLayer.appendChild(priceMark);
this.projectionDiagnostic = document.createElement('pre');
this.projectionDiagnostic.className = 'projection-diagnostic';
this.projectionDiagnostic.hidden = true;
@ -927,7 +934,8 @@ class ConfluenceChart {
price,
color: '#b7771d',
lineWidth: 1,
lineStyle: LightweightCharts.LineStyle.Dotted,
lineStyle: LightweightCharts.LineStyle.LargeDashed,
lineVisible: false,
axisLabelVisible: true,
title: '',
};
@ -939,19 +947,29 @@ class ConfluenceChart {
}
syncCurrentPricePulse() {
if (!this.currentPricePulse) return;
const show = this.animateCurrentPrice && this.lastCurrentPrice != null;
this.currentPricePulse.hidden = !show;
this.currentPricePulse.classList.toggle('active', show);
if (!show || !this.candles || this.lastCurrentPrice == null || !this.chartEl) return;
const showFrame = this.animateCurrentPrice && this.lastCurrentPrice != null;
if (this.currentPricePulse) {
this.currentPricePulse.hidden = !showFrame;
this.currentPricePulse.classList.toggle('active', showFrame);
}
if (!this.candles || this.lastCurrentPrice == null || !this.chartEl) return;
const y = this.candles.priceToCoordinate(this.lastCurrentPrice);
const canvas = this.plotCanvas();
if (y == null || !canvas) return;
const chart = this.chartEl.getBoundingClientRect();
const plot = canvas.getBoundingClientRect();
this.currentPricePulse.style.left = `${Math.round(plot.right - chart.left)}px`;
this.currentPricePulse.style.top = `${Math.round(plot.top - chart.top + y - 10)}px`;
this.currentPricePulse.style.width = `${Math.max(40, Math.round(chart.right - plot.right))}px`;
const top = Math.round(y);
if (showFrame && this.currentPricePulse) {
this.currentPricePulse.style.left = `${Math.round(plot.right - chart.left)}px`;
this.currentPricePulse.style.top = `${Math.round(plot.top - chart.top + y - 10)}px`;
this.currentPricePulse.style.width = `${Math.max(40, Math.round(chart.right - plot.right))}px`;
}
if (this.currentPriceRay) {
this.currentPriceRay.setAttribute('x1', '0');
this.currentPriceRay.setAttribute('x2', String(this.overlayLayer?.clientWidth || plot.width));
this.currentPriceRay.setAttribute('y1', String(top));
this.currentPriceRay.setAttribute('y2', String(top));
}
}
setCommentHandlers({ onToggle, onMove, onSelect }) {

2
static/style.css
View file

@ -13,7 +13,7 @@ main { display:grid; grid-template-columns:minmax(0, 1fr) 300px; gap:16px; }
button { border:1px solid var(--line); background:transparent; color:var(--muted); padding:6px 11px; font:inherit; cursor:pointer; }button.active { color:var(--bg); background:var(--accent); border-color:var(--accent); }
.chart-head-tools { display:flex; align-items:center; gap:8px; }.undo-btn { display:grid; place-items:center; width:32px; height:28px; padding:0; flex:none; }.undo-btn:disabled { opacity:.35; cursor:default; }.timeframes { display:flex; flex-wrap:wrap; justify-content:flex-end; }.timeframes button+button { border-left:0; }
.drawing-tools { min-height:38px; padding:5px 12px; display:flex; align-items:center; gap:9px; border-bottom:1px solid var(--line); color:var(--muted); font-size:10px; }.drawing-tools button,.drawing-tools select,.drawing-tools .line-name { padding:4px 8px; font-size:10px; }.drawing-tools select,.drawing-tools .line-name { background:var(--panel); color:var(--fg); border:1px solid var(--line); }.drawing-tools .line-name { width:130px; font:inherit; }.drawing-tools label { display:flex; gap:4px; align-items:center; }.drawing-tools input { accent-color:var(--accent); }
#chart { position:relative; height:calc(100vh - 190px); min-height:420px; touch-action:pan-y; }.chart-preview,.chart-line-bridges,.chart-handles { position:absolute; inset:0; width:100%; height:100%; overflow:hidden; pointer-events:none; }.chart-preview,.chart-line-bridges { z-index:4; }.chart-line-bridges line { stroke-linecap:round; }.chart-handles { z-index:6; }.chart-preview line[hidden],.chart-anchor[hidden],.chart-line-hit[hidden],.chart-line-focus[hidden],.chart-fib-focus[hidden] { display:none; }.chart-line-focus { stroke-linecap:round; pointer-events:none; animation:line-focus .75s ease-out forwards; }.chart-line-hit { fill:none; stroke:transparent; stroke-width:16px; pointer-events:stroke; cursor:move; touch-action:none; }.chart-anchor { stroke:var(--panel); stroke-width:2px; cursor:grab; pointer-events:all; touch-action:none; }.chart-anchor:active { cursor:grabbing; }.chart-tooltip { position:absolute; z-index:5; padding:4px 7px; border:1px solid var(--line); background:var(--panel); color:var(--fg); font-size:10px; white-space:pre-line; pointer-events:none; }.chart-tooltip[hidden] { display:none; }
#chart { position:relative; height:calc(100vh - 190px); min-height:420px; touch-action:pan-y; }.chart-preview,.chart-line-bridges,.chart-handles,.current-price-mark { position:absolute; inset:0; width:100%; height:100%; overflow:hidden; pointer-events:none; }.current-price-mark { z-index:4; }.current-price-mark line { stroke:var(--accent); stroke-width:2; stroke-dasharray:14 4 2 4; }.chart-preview,.chart-line-bridges { z-index:4; }.chart-line-bridges line { stroke-linecap:round; }.chart-handles { z-index:6; }.chart-preview line[hidden],.chart-anchor[hidden],.chart-line-hit[hidden],.chart-line-focus[hidden],.chart-fib-focus[hidden] { display:none; }.chart-line-focus { stroke-linecap:round; pointer-events:none; animation:line-focus .75s ease-out forwards; }.chart-line-hit { fill:none; stroke:transparent; stroke-width:16px; pointer-events:stroke; cursor:move; touch-action:none; }.chart-anchor { stroke:var(--panel); stroke-width:2px; cursor:grab; pointer-events:all; touch-action:none; }.chart-anchor:active { cursor:grabbing; }.chart-tooltip { position:absolute; z-index:5; padding:4px 7px; border:1px solid var(--line); background:var(--panel); color:var(--fg); font-size:10px; white-space:pre-line; pointer-events:none; }.chart-tooltip[hidden] { display:none; }
.current-price-pulse { position:absolute; z-index:8; height:20px; box-sizing:border-box; border:1px solid var(--accent); opacity:0; pointer-events:none; }.current-price-pulse.active { opacity:1; animation:current-price-frame 1.8s ease-in-out infinite; }@keyframes current-price-frame { 0%,100% { opacity:1; } 50% { opacity:.25; } }
.chart-ohlc { position:absolute; top:6px; left:8px; z-index:5; padding:2px 6px; border:1px solid var(--line); background:color-mix(in srgb,var(--panel) 90%,transparent); color:var(--fg); font-size:10px; font-variant-numeric:tabular-nums; pointer-events:none; white-space:nowrap; }.chart-ohlc.up { color:var(--green); }.chart-ohlc.down { color:var(--red); }.chart-ohlc[hidden] { display:none; }
.projection-diagnostic { position:absolute; top:8px; left:8px; z-index:9; margin:0; padding:5px 7px; border:1px solid var(--line); background:color-mix(in srgb,var(--panel) 92%,transparent); color:var(--fg); font:9px/1.35 "IBM Plex Mono", monospace; white-space:pre; }