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uodated charting

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KS Jannette
2026-02-22 17:10:24 -05:00
parent bde189d8f5
commit 84c2a99456
13 changed files with 756 additions and 715 deletions
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trahn-trade-frontend/src/components/Chart.jsx
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@@ -1,350 +1,340 @@
import { useRef, useEffect, useState } from 'react';
const COLORS = {
line: '#58a6ff',
green: '#3fb950',
greenFill: 'rgba(63, 185, 80, 0.12)',
red: '#f85149',
redFill: 'rgba(248, 81, 73, 0.12)',
grid: '#21262d',
text: '#8b949e',
textMuted: '#484f58',
baseline: '#30363d',
buy: '#f0c000',
sell: '#db6d28',
bg: '#0d1117',
line: '#58a6ff',
green: '#3fb950',
greenFill: 'rgba(63, 185, 80, 0.12)',
red: '#f85149',
redFill: 'rgba(248, 81, 73, 0.12)',
grid: '#21262d',
text: '#8b949e',
textMuted: '#484f58',
baseline: '#30363d',
buy: '#f0c000',
sell: '#db6d28',
bg: '#0d1117',
};
const PADDING = { top: 20, right: 80, bottom: 40, left: 20 };
export function Chart({ prices, trades }) {
const canvasRef = useRef(null);
const containerRef = useRef(null);
const [tooltip, setTooltip] = useState(null);
const [dimensions, setDimensions] = useState({ width: 0, height: 0 });
const canvasRef = useRef(null);
const containerRef = useRef(null);
const [tooltip, setTooltip] = useState(null);
const [dimensions, setDimensions] = useState({ width: 0, height: 0 });
// Handle resize
useEffect(() => {
const updateDimensions = () => {
if (containerRef.current) {
const rect = containerRef.current.getBoundingClientRect();
setDimensions({ width: rect.width, height: rect.height });
}
};
updateDimensions();
window.addEventListener('resize', updateDimensions);
return () => window.removeEventListener('resize', updateDimensions);
}, []);
// Draw chart
useEffect(() => {
const canvas = canvasRef.current;
if (!canvas || dimensions.width === 0) return;
const ctx = canvas.getContext('2d');
const dpr = window.devicePixelRatio || 1;
canvas.width = dimensions.width * dpr;
canvas.height = dimensions.height * dpr;
ctx.scale(dpr, dpr);
const width = dimensions.width;
const height = dimensions.height;
const chartWidth = width - PADDING.left - PADDING.right;
const chartHeight = height - PADDING.top - PADDING.bottom;
// Clear
ctx.clearRect(0, 0, width, height);
if (!prices || prices.length === 0) {
ctx.fillStyle = COLORS.textMuted;
ctx.font = '14px JetBrains Mono, monospace';
ctx.textAlign = 'center';
ctx.fillText('No data for this day', width / 2, height / 2);
return;
}
// Calculate bounds
const priceValues = prices.map(d => d.p || d.price);
const times = prices.map(d => d.t || d.timestamp);
let minPrice = Math.min(...priceValues);
let maxPrice = Math.max(...priceValues);
const minTime = Math.min(...times);
const maxTime = Math.max(...times);
const pricePadding = (maxPrice - minPrice) * 0.05 || 10;
minPrice -= pricePadding;
maxPrice += pricePadding;
const baselinePrice = priceValues[0];
// Coordinate converters
const priceToY = (price) => {
const range = maxPrice - minPrice;
const normalized = (price - minPrice) / range;
return PADDING.top + chartHeight * (1 - normalized);
};
const timeToX = (timestamp) => {
const range = maxTime - minTime;
const normalized = (timestamp - minTime) / range;
return PADDING.left + chartWidth * normalized;
};
// Draw grid
ctx.strokeStyle = COLORS.grid;
ctx.lineWidth = 1;
const priceStep = calculateNiceStep(maxPrice - minPrice, 5);
const startPrice = Math.ceil(minPrice / priceStep) * priceStep;
for (let price = startPrice; price <= maxPrice; price += priceStep) {
const y = priceToY(price);
ctx.beginPath();
ctx.moveTo(PADDING.left, y);
ctx.lineTo(width - PADDING.right, y);
ctx.stroke();
}
// Draw baseline
const baselineY = priceToY(baselinePrice);
ctx.strokeStyle = COLORS.baseline;
ctx.setLineDash([4, 4]);
ctx.beginPath();
ctx.moveTo(PADDING.left, baselineY);
ctx.lineTo(width - PADDING.right, baselineY);
ctx.stroke();
ctx.setLineDash([]);
// Draw gradient fill
if (prices.length >= 2) {
ctx.beginPath();
ctx.moveTo(timeToX(times[0]), baselineY);
ctx.lineTo(timeToX(times[0]), priceToY(priceValues[0]));
for (let i = 1; i < prices.length; i++) {
ctx.lineTo(timeToX(times[i]), priceToY(priceValues[i]));
}
ctx.lineTo(timeToX(times[times.length - 1]), baselineY);
ctx.closePath();
const gradient = ctx.createLinearGradient(0, PADDING.top, 0, height - PADDING.bottom);
gradient.addColorStop(0, COLORS.greenFill);
gradient.addColorStop(0.5, 'rgba(0,0,0,0)');
gradient.addColorStop(1, COLORS.redFill);
ctx.fillStyle = gradient;
ctx.fill();
}
// Draw price line
if (prices.length >= 2) {
ctx.beginPath();
ctx.strokeStyle = COLORS.line;
ctx.lineWidth = 2;
ctx.lineJoin = 'round';
ctx.lineCap = 'round';
ctx.moveTo(timeToX(times[0]), priceToY(priceValues[0]));
for (let i = 1; i < prices.length; i++) {
ctx.lineTo(timeToX(times[i]), priceToY(priceValues[i]));
}
ctx.stroke();
}
// Draw Y axis labels
ctx.fillStyle = COLORS.text;
ctx.font = '11px JetBrains Mono, monospace';
ctx.textAlign = 'left';
for (let price = startPrice; price <= maxPrice; price += priceStep) {
const y = priceToY(price);
ctx.fillText(formatPrice(price), width - PADDING.right + 8, y + 4);
}
// Draw X axis labels
ctx.textAlign = 'center';
const hourMs = 60 * 60 * 1000;
const rangeMs = maxTime - minTime;
let stepMs = hourMs * 4;
if (rangeMs < hourMs * 6) stepMs = hourMs;
if (rangeMs < hourMs * 2) stepMs = hourMs / 2;
let current = Math.ceil(minTime / stepMs) * stepMs;
while (current <= maxTime) {
const x = timeToX(current);
if (x >= PADDING.left && x <= width - PADDING.right) {
const date = new Date(current);
const label = date.toLocaleTimeString('en-US', { hour: '2-digit', minute: '2-digit', hour12: false });
ctx.fillText(label, x, height - PADDING.bottom + 20);
}
current += stepMs;
}
// Draw trades
for (const trade of (trades || [])) {
const x = timeToX(trade.t || trade.timestamp);
const y = priceToY(trade.price);
if (x < PADDING.left || x > width - PADDING.right) continue;
const color = trade.side === 'buy' ? COLORS.buy : COLORS.sell;
const radius = 7;
// Glow
ctx.beginPath();
ctx.arc(x, y, radius + 4, 0, Math.PI * 2);
ctx.fillStyle = color + '33';
ctx.fill();
// Outer
ctx.beginPath();
ctx.arc(x, y, radius, 0, Math.PI * 2);
ctx.fillStyle = color;
ctx.fill();
// Inner
ctx.beginPath();
ctx.arc(x, y, radius - 3, 0, Math.PI * 2);
ctx.fillStyle = COLORS.bg;
ctx.fill();
}
// Draw current price tag
if (prices.length > 0) {
const lastPrice = priceValues[priceValues.length - 1];
const y = priceToY(lastPrice);
const x = width - PADDING.right;
const isUp = lastPrice >= baselinePrice;
const color = isUp ? COLORS.green : COLORS.red;
ctx.fillStyle = color;
roundRect(ctx, x + 4, y - 11, 70, 22, 4);
ctx.fill();
ctx.fillStyle = '#fff';
ctx.font = 'bold 11px JetBrains Mono, monospace';
ctx.textAlign = 'left';
ctx.fillText(formatPrice(lastPrice), x + 10, y + 4);
}
}, [prices, trades, dimensions]);
// Mouse handling for tooltip
const handleMouseMove = (e) => {
if (!prices || prices.length === 0) {
setTooltip(null);
return;
}
const rect = canvasRef.current.getBoundingClientRect();
const x = e.clientX - rect.left;
const y = e.clientY - rect.top;
const width = dimensions.width;
const height = dimensions.height;
const chartWidth = width - PADDING.left - PADDING.right;
if (x < PADDING.left || x > width - PADDING.right ||
y < PADDING.top || y > height - PADDING.bottom) {
setTooltip(null);
return;
}
const times = prices.map(d => d.t || d.timestamp);
const minTime = Math.min(...times);
const maxTime = Math.max(...times);
const normalized = (x - PADDING.left) / chartWidth;
const timestamp = minTime + normalized * (maxTime - minTime);
let nearestPoint = null;
let nearestDistance = Infinity;
for (const point of prices) {
const t = point.t || point.timestamp;
const distance = Math.abs(t - timestamp);
if (distance < nearestDistance) {
nearestDistance = distance;
nearestPoint = point;
}
}
if (nearestPoint) {
setTooltip({
x: e.clientX - rect.left + 15,
y: e.clientY - rect.top - 10,
price: nearestPoint.p || nearestPoint.price,
timestamp: nearestPoint.t || nearestPoint.timestamp,
});
}
// Handle resize
useEffect(() => {
const updateDimensions = () => {
if (containerRef.current) {
const rect = containerRef.current.getBoundingClientRect();
setDimensions({ width: rect.width, height: rect.height });
}
};
return (
<div className="chart-container" ref={containerRef}>
<canvas
ref={canvasRef}
style={{ width: '100%', height: '100%' }}
onMouseMove={handleMouseMove}
onMouseLeave={() => setTooltip(null)}
/>
{tooltip && (
<div
className="tooltip visible"
style={{ left: tooltip.x, top: tooltip.y }}
>
<div className="price">
${tooltip.price.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
</div>
<div className="time">
{new Date(tooltip.timestamp).toLocaleString('en-US', {
month: 'short',
day: 'numeric',
hour: '2-digit',
minute: '2-digit'
})}
</div>
</div>
)}
updateDimensions();
window.addEventListener('resize', updateDimensions);
return () => window.removeEventListener('resize', updateDimensions);
}, []);
useEffect(() => {
const canvas = canvasRef.current;
if (!canvas || dimensions.width === 0) return;
const ctx = canvas.getContext('2d');
const dpr = window.devicePixelRatio || 1;
canvas.width = dimensions.width * dpr;
canvas.height = dimensions.height * dpr;
ctx.scale(dpr, dpr);
const width = dimensions.width;
const height = dimensions.height;
const chartWidth = width - PADDING.left - PADDING.right;
const chartHeight = height - PADDING.top - PADDING.bottom;
// Clear
ctx.clearRect(0, 0, width, height);
if (!prices || prices.length === 0) {
ctx.fillStyle = COLORS.textMuted;
ctx.font = '18px Ac437_Rainbow100_re_132, monospace';
ctx.textAlign = 'center';
ctx.fillText('No data for this day', width / 2, height / 2);
return;
}
// Calculate bounds
const priceValues = prices.map(d => d.p || d.price);
const times = prices.map(d => d.t || d.timestamp);
let minPrice = Math.min(...priceValues);
let maxPrice = Math.max(...priceValues);
const minTime = Math.min(...times);
const maxTime = Math.max(...times);
const pricePadding = (maxPrice - minPrice) * 0.05 || 10;
minPrice -= pricePadding;
maxPrice += pricePadding;
const baselinePrice = priceValues[0];
// Coordinate converters
const priceToY = (price) => {
const range = maxPrice - minPrice;
const normalized = (price - minPrice) / range;
return PADDING.top + chartHeight * (1 - normalized);
};
const timeToX = (timestamp) => {
const range = maxTime - minTime;
const normalized = (timestamp - minTime) / range;
return PADDING.left + chartWidth * normalized;
};
// Draw grid
ctx.strokeStyle = COLORS.grid;
ctx.lineWidth = 1;
const priceStep = calculateNiceStep(maxPrice - minPrice, 5);
const startPrice = Math.ceil(minPrice / priceStep) * priceStep;
for (let price = startPrice; price <= maxPrice; price += priceStep) {
const y = priceToY(price);
ctx.beginPath();
ctx.moveTo(PADDING.left, y);
ctx.lineTo(width - PADDING.right, y);
ctx.stroke();
}
const baselineY = priceToY(baselinePrice);
ctx.strokeStyle = COLORS.baseline;
ctx.setLineDash([4, 4]);
ctx.beginPath();
ctx.moveTo(PADDING.left, baselineY);
ctx.lineTo(width - PADDING.right, baselineY);
ctx.stroke();
ctx.setLineDash([]);
if (prices.length >= 2) {
ctx.beginPath();
ctx.moveTo(timeToX(times[0]), baselineY);
ctx.lineTo(timeToX(times[0]), priceToY(priceValues[0]));
for (let i = 1; i < prices.length; i++) {
ctx.lineTo(timeToX(times[i]), priceToY(priceValues[i]));
}
ctx.lineTo(timeToX(times[times.length - 1]), baselineY);
ctx.closePath();
const gradient = ctx.createLinearGradient(0, PADDING.top, 0, height - PADDING.bottom);
gradient.addColorStop(0, COLORS.greenFill);
gradient.addColorStop(0.5, 'rgba(0,0,0,0)');
gradient.addColorStop(1, COLORS.redFill);
ctx.fillStyle = gradient;
ctx.fill();
}
if (prices.length >= 2) {
ctx.beginPath();
ctx.strokeStyle = COLORS.line;
ctx.lineWidth = 2;
ctx.lineJoin = 'round';
ctx.lineCap = 'round';
ctx.moveTo(timeToX(times[0]), priceToY(priceValues[0]));
for (let i = 1; i < prices.length; i++) {
ctx.lineTo(timeToX(times[i]), priceToY(priceValues[i]));
}
ctx.stroke();
}
ctx.fillStyle = COLORS.text;
ctx.font = '14px Ac437_Rainbow100_re_132, monospace';
ctx.textAlign = 'left';
for (let price = startPrice; price <= maxPrice; price += priceStep) {
const y = priceToY(price);
ctx.fillText(formatPrice(price), width - PADDING.right + 8, y + 4);
}
ctx.textAlign = 'center';
const hourMs = 60 * 60 * 1000;
const rangeMs = maxTime - minTime;
let stepMs = hourMs * 4;
if (rangeMs < hourMs * 6) stepMs = hourMs;
if (rangeMs < hourMs * 2) stepMs = hourMs / 2;
let current = Math.ceil(minTime / stepMs) * stepMs;
while (current <= maxTime) {
const x = timeToX(current);
if (x >= PADDING.left && x <= width - PADDING.right) {
const date = new Date(current);
const label = date.toLocaleTimeString('en-US', { hour: '2-digit', minute: '2-digit', hour12: false });
ctx.fillText(label, x, height - PADDING.bottom + 20);
}
current += stepMs;
}
for (const trade of (trades || [])) {
const x = timeToX(trade.t || trade.timestamp);
const y = priceToY(trade.price);
if (x < PADDING.left || x > width - PADDING.right) continue;
const color = trade.side === 'buy' ? COLORS.buy : COLORS.sell;
const radius = 7;
ctx.beginPath();
ctx.arc(x, y, radius + 4, 0, Math.PI * 2);
ctx.fillStyle = color + '33';
ctx.fill();
// Outer
ctx.beginPath();
ctx.arc(x, y, radius, 0, Math.PI * 2);
ctx.fillStyle = color;
ctx.fill();
// Inner
ctx.beginPath();
ctx.arc(x, y, radius - 3, 0, Math.PI * 2);
ctx.fillStyle = COLORS.bg;
ctx.fill();
}
if (prices.length > 0) {
const lastPrice = priceValues[priceValues.length - 1];
const y = priceToY(lastPrice);
const x = width - PADDING.right;
const isUp = lastPrice >= baselinePrice;
const color = isUp ? COLORS.green : COLORS.red;
ctx.fillStyle = color;
roundRect(ctx, x + 4, y - 11, 70, 22, 4);
ctx.fill();
ctx.fillStyle = '#fff';
ctx.font = 'bold 14px Ac437_Rainbow100_re_132, monospace';
ctx.textAlign = 'left';
ctx.fillText(formatPrice(lastPrice), x + 10, y + 4);
}
}, [prices, trades, dimensions]);
const handleMouseMove = (e) => {
if (!prices || prices.length === 0) {
setTooltip(null);
return;
}
const rect = canvasRef.current.getBoundingClientRect();
const x = e.clientX - rect.left;
const y = e.clientY - rect.top;
const width = dimensions.width;
const height = dimensions.height;
const chartWidth = width - PADDING.left - PADDING.right;
if (x < PADDING.left || x > width - PADDING.right ||
y < PADDING.top || y > height - PADDING.bottom) {
setTooltip(null);
return;
}
const times = prices.map(d => d.t || d.timestamp);
const minTime = Math.min(...times);
const maxTime = Math.max(...times);
const normalized = (x - PADDING.left) / chartWidth;
const timestamp = minTime + normalized * (maxTime - minTime);
let nearestPoint = null;
let nearestDistance = Infinity;
for (const point of prices) {
const t = point.t || point.timestamp;
const distance = Math.abs(t - timestamp);
if (distance < nearestDistance) {
nearestDistance = distance;
nearestPoint = point;
}
}
if (nearestPoint) {
setTooltip({
x: e.clientX - rect.left + 15,
y: e.clientY - rect.top - 10,
price: nearestPoint.p || nearestPoint.price,
timestamp: nearestPoint.t || nearestPoint.timestamp,
});
}
};
return (
<div className="chart-container" ref={containerRef}>
<canvas
ref={canvasRef}
style={{ width: '100%', height: '100%' }}
onMouseMove={handleMouseMove}
onMouseLeave={() => setTooltip(null)}
/>
{tooltip && (
<div
className="tooltip visible"
style={{ left: tooltip.x, top: tooltip.y }}
>
<div className="price">
${tooltip.price.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
</div>
<div className="time">
{new Date(tooltip.timestamp).toLocaleString('en-US', {
month: 'short',
day: 'numeric',
hour: '2-digit',
minute: '2-digit'
})}
</div>
</div>
);
)}
</div>
);
}
function calculateNiceStep(range, targetSteps) {
const roughStep = range / targetSteps;
const magnitude = Math.pow(10, Math.floor(Math.log10(roughStep)));
const normalized = roughStep / magnitude;
let niceStep;
if (normalized <= 1.5) niceStep = 1;
else if (normalized <= 3) niceStep = 2;
else if (normalized <= 7) niceStep = 5;
else niceStep = 10;
return niceStep * magnitude;
const roughStep = range / targetSteps;
const magnitude = Math.pow(10, Math.floor(Math.log10(roughStep)));
const normalized = roughStep / magnitude;
let niceStep;
if (normalized <= 1.5) niceStep = 1;
else if (normalized <= 3) niceStep = 2;
else if (normalized <= 7) niceStep = 5;
else niceStep = 10;
return niceStep * magnitude;
}
function formatPrice(price) {
if (price >= 10000) {
return '$' + (price / 1000).toFixed(1) + 'k';
}
return '$' + price.toLocaleString('en-US', { minimumFractionDigits: 0, maximumFractionDigits: 0 });
if (price >= 10000) {
return '$' + (price / 1000).toFixed(1) + 'k';
}
return '$' + price.toLocaleString('en-US', { minimumFractionDigits: 0, maximumFractionDigits: 0 });
}
function roundRect(ctx, x, y, width, height, radius) {
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
}