JavaScript高级数据可视化：构建实时股票交易仪表盘 | JS实战教程

`;
}

initPriceChart() {
const canvas = document.getElementById(‘priceChart’);
this.components.set(‘priceChart’, new RealTimeChart(canvas, {
timeframe: ‘1m’,
indicators: [‘SMA20’, ‘SMA50’, ‘RSI’]
}));
}

initOrderBook() {
const container = document.getElementById(‘orderBook’);
this.components.set(‘orderBook’, new OrderBook(container, {
depth: 20,
updateFrequency: 1000
}));
}

setupDataFlow() {
// 订阅实时数据
this.websocketManager.subscribe(‘price’, (data) => {
this.dataManager.addPriceData(data);
this.updatePriceChart(data);
});

this.websocketManager.subscribe(‘orderbook’, (data) => {
this.updateOrderBook(data);
});

this.websocketManager.subscribe(‘trades’, (data) => {
this.updateRecentTrades(data);
});
}

updatePriceChart(data) {
const chart = this.components.get(‘priceChart’);
chart.updateData(data);

// 更新技术指标
this.updateTechnicalIndicators(data);
}

updateOrderBook(data) {
const orderBook = this.components.get(‘orderBook’);
orderBook.update(data);
}

startRenderLoop() {
const render = () => {
this.components.forEach(component => {
if (typeof component.render === ‘function’) {
component.render();
}
});

this.updatePerformanceStats();
requestAnimationFrame(render);
};

render();
}

updatePerformanceStats() {
const stats = {
fps: this.calculateFPS(),
memory: performance.memory ? performance.memory.usedJSHeapSize : 0,
dataPoints: this.dataManager.getDataCount()
};

this.updateStatusDisplay(stats);
}

calculateFPS() {
const now = performance.now();
if (!this.lastFrameTime) {
this.lastFrameTime = now;
this.frameCount = 0;
return 0;
}

this.frameCount++;
if (now >= this.lastFrameTime + 1000) {
this.fps = Math.round((this.frameCount * 1000) / (now – this.lastFrameTime));
this.frameCount = 0;
this.lastFrameTime = now;
}

return this.fps || 0;
}
}

// 启动仪表盘
document.addEventListener(‘DOMContentLoaded’, () => {
const dashboard = new TradingDashboard(‘dashboardContainer’);

// 模拟数据流（开发环境）
if (process.env.NODE_ENV === ‘development’) {
dashboard.startMockDataStream();
}
});

功能特性总结

• 实时价格图表与历史数据回顾
• 深度订单簿实时更新
• 多种技术指标计算与显示
• 响应式布局支持多设备
• 高性能大数据渲染引擎
• 完整的错误处理和重连机制