hz4th_coder
576024af76
- 双Y轴：左右两个轴都可单独命名（左轴名称/右轴名称输入框） - 修复系列类型下拉不生效的 bug（seriesTypeOverrides 只写不读）， 现在每个系列可独立设置柱状/折线，结合轴分配实现'左轴柱状+右轴折线' - 后端 /api/chart 新增 leftAxisName + seriesTypes 参数（POST/GET 均可）
1263 lines
45 KiB
JavaScript
1263 lines
45 KiB
JavaScript
// ===== 全局状态 =====
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let chartInstance = null;
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let parsedData = null;
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let seriesColors = [];
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let seriesOrder = [];
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let seriesAxis = []; // 每个系列所属轴：0=左轴 1=右轴
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let currentMode = 'chart'; // 'chart' or 'table'
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let tableImageBlob = null;
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// ===== 预设颜色方案 =====
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const colorPalettes = {
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default: ['#5470c6', '#91cc75', '#fac858', '#ee6666', '#73c0de', '#3ba272', '#fc8452', '#9a60b4', '#ea7ccc'],
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dark: ['#4fc3f7', '#81c784', '#fff176', '#ff8a65', '#ba68c8', '#4dd0e1', '#ffab91', '#aed581', '#f48fb1'],
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macarons: ['#2ec7c9', '#b6a2de', '#5ab1ef', '#ffb980', '#d87a80', '#8d98b3', '#e5cf0d', '#97b552', '#95706d'],
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gradient: ['#7f7fd5', '#86a8e7', '#91eae4', '#ff6b6b', '#feca57', '#48dbfb', '#ff9ff3', '#54a0ff', '#5f27cd'],
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retro: ['#d4a5a5', '#95b9c7', '#f6e8c3', '#dfceb4', '#a4c3b5', '#c9b1ff', '#f5c7b8', '#b8d4e3', '#e8c8a0'],
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ocean: ['#0077b6', '#00b4d8', '#90e0ef', '#caf0f8', '#023e8a', '#48cae4', '#ade8f4', '#0096c7', '#03045e'],
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forest: ['#2d6a4f', '#40916c', '#52b788', '#74c69d', '#95d5b2', '#b7e4c7', '#d8f3dc', '#1b4332', '#344e41'],
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sunset: ['#e85d04', '#f48c06', '#faa307', '#ffba08', '#dc2f02', '#d00000', '#9d0208', '#6a040f', '#370617'],
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lavender: ['#7c3aed', '#8b5cf6', '#a78bfa', '#c4b5fd', '#ddd6fe', '#ede9fe', '#5b21b6', '#4c1d95', '#6d28d9'],
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minimal: ['#111827', '#374151', '#6b7280', '#9ca3af', '#d1d5db', '#e5e7eb', '#f3f4f6', '#4b5563', '#1f2937'],
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cherry: ['#e91e63', '#f06292', '#f48fb1', '#f8bbd0', '#fce4ec', '#c2185b', '#ad1457', '#880e4f', '#d81b60'],
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midnight: ['#6c63ff', '#5a52d5', '#483fb5', '#7c79ff', '#3d3d5c', '#8b89ff', '#9d9bff', '#2c2c4a', '#b3b2ff'],
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gold: ['#b8860b', '#daa520', '#f0c040', '#ffd700', '#ffe066', '#996515', '#cc9900', '#e6b800', '#8b6914'],
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coral: ['#ff6f61', '#ff8a70', '#ffa07a', '#ffab91', '#ffccbc', '#e64a19', '#f4511e', '#ff5722', '#d84315'],
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mint: ['#00bfa5', '#26a69a', '#4db6ac', '#80cbc4', '#b2dfdb', '#00897b', '#00796b', '#004d40', '#009688']
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};
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// ===== 示例数据 =====
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const sampleDataSets = [
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{
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name: '季度销售对比',
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data: `产品, Q1, Q2, Q3, Q4
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手机, 1200, 1800, 2100, 2500
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平板, 800, 950, 1100, 1300
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笔记本, 600, 750, 900, 1050
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耳机, 400, 520, 680, 800`
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},
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{
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name: '年度增长趋势',
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data: `指标, 2020年, 2021年, 2022年, 2023年, 2024年
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营收(万), 500, 680, 820, 1050, 1380
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利润(万), 80, 120, 160, 230, 350
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用户(千), 50, 85, 130, 200, 320`
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},
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{
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name: '多指标对比（适合区域分割）',
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data: `月份, 方案A-效率, 方案A-成本, 方案B-效率, 方案B-成本
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1月, 85, 120, 78, 135
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2月, 88, 115, 82, 128
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3月, 92, 108, 88, 120
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4月, 90, 112, 95, 110
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5月, 95, 105, 98, 105
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6月, 98, 98, 102, 95`
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}
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];
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// ===== 初始化 =====
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document.addEventListener('DOMContentLoaded', () => {
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// 默认加载第一个示例
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document.getElementById('dataInput').value = sampleDataSets[0].data;
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generateChart();
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// 预填双图合并示例（不提前生成，切到双图模式时由 switchMode 触发）
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document.getElementById('combineData1').value = sampleDataSets[0].data;
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document.getElementById('combineData2').value = sampleDataSets[1].data;
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document.getElementById('combineTitle1').value = '季度销售对比';
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document.getElementById('combineType2').value = 'line';
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document.getElementById('combineTitle2').value = '年度增长趋势';
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// 初始化导出设置
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renderHistory();
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refreshExportHint();
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});
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// ===== 数据解析 =====
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function parseData(rawText) {
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const lines = rawText.trim().split('\n').filter(l => l.trim());
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if (lines.length < 2) {
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alert('数据至少需要包含表头和一行数据');
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return null;
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}
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// 自动检测分隔符
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let delimiter = ',';
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if (lines[0].includes('\t')) {
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delimiter = '\t';
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} else if (lines[0].split('|').length > lines[0].split(',').length) {
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delimiter = '|';
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}
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const rows = lines.map(line => {
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return line.split(delimiter).map(cell => cell.trim());
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});
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const headers = rows[0];
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const categories = [];
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const seriesData = {};
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// 第一列是横坐标，其余列是系列
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for (let i = 1; i < headers.length; i++) {
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seriesData[headers[i]] = [];
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}
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for (let i = 1; i < rows.length; i++) {
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categories.push(rows[i][0]);
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for (let j = 1; j < rows[i].length && j < headers.length; j++) {
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const val = parseFloat(rows[i][j]);
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seriesData[headers[j]].push(isNaN(val) ? 0 : val);
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}
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}
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return {
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categories,
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seriesNames: headers.slice(1),
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seriesData
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};
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}
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// ===== 生成图表 =====
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function generateChart() {
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const rawText = document.getElementById('dataInput').value;
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if (!rawText.trim()) {
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alert('请输入数据');
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return;
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}
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parsedData = parseData(rawText);
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if (!parsedData) return;
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// 初始化系列顺序和颜色
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seriesOrder = parsedData.seriesNames.map((_, i) => i);
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const palette = colorPalettes[document.getElementById('themeStyle').value] || colorPalettes.default;
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seriesColors = parsedData.seriesNames.map((_, i) => palette[i % palette.length]);
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seriesAxis = parsedData.seriesNames.map(() => 0);
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// 渲染系列配置
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renderSeriesConfig();
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// 初始化图表
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initChart();
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updateChart();
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refreshPreview();
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}
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// ===== 初始化图表实例 =====
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function initChart() {
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const chartDom = document.getElementById('chartArea');
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chartDom.innerHTML = '';
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if (chartInstance) {
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chartInstance.dispose();
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}
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chartInstance = echarts.init(chartDom, null, { renderer: 'canvas' });
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// 响应式
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window.addEventListener('resize', () => {
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chartInstance && chartInstance.resize();
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});
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}
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// ===== 更新图表 =====
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function updateChart() {
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if (!parsedData || !chartInstance) return;
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const chartType = document.getElementById('chartType').value;
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const title = document.getElementById('chartTitle').value;
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const theme = document.getElementById('themeStyle').value;
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const showLegend = document.getElementById('showLegend').checked;
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const showGrid = document.getElementById('showGrid').checked;
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const showLabel = document.getElementById('showLabel').checked;
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const stackMode = document.getElementById('stackMode').checked;
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const smoothLine = document.getElementById('smoothLine').checked;
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const enableSplit = document.getElementById('enableSplit').checked;
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const dualAxis = document.getElementById('dualAxis').checked;
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const leftAxisName = document.getElementById('leftAxisName').value;
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const rightAxisName = document.getElementById('rightAxisName').value;
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// 显示/隐藏分割配置
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document.getElementById('splitConfig').style.display = enableSplit ? 'block' : 'none';
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// 背景色
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const bgColor = theme === 'dark' ? '#1a1a2e' : '#ffffff';
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const textColor = theme === 'dark' ? '#e0e0e0' : '#333333';
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const axisLineColor = theme === 'dark' ? '#444' : '#ddd';
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// 按当前顺序构建系列
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const palette = colorPalettes[theme] || colorPalettes.default;
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const series = seriesOrder.map((origIdx, displayIdx) => {
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const name = parsedData.seriesNames[origIdx];
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const data = parsedData.seriesData[name];
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const color = seriesColors[origIdx] || palette[origIdx % palette.length];
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// 系列类型：优先用系列配置的独立覆盖（支持不同轴不同图表类型）
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const override = window.seriesTypeOverrides && window.seriesTypeOverrides[origIdx];
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let type;
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if (override && override !== 'auto') {
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type = override;
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} else if (chartType === 'bar-line') {
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type = displayIdx % 2 === 0 ? 'bar' : 'line';
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} else {
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type = chartType;
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}
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const seriesItem = {
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name: name,
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type: type,
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data: [...data],
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itemStyle: { color: color },
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emphasis: {
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focus: 'series',
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itemStyle: {
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shadowBlur: 10,
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shadowColor: 'rgba(0,0,0,0.3)'
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}
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}
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};
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// 堆叠
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if (stackMode) {
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seriesItem.stack = 'total';
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}
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// 折线图特有
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if (type === 'line') {
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seriesItem.smooth = smoothLine;
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seriesItem.lineStyle = { width: 3 };
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seriesItem.symbolSize = 8;
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seriesItem.areaStyle = theme === 'gradient' ? {
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opacity: 0.15
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} : undefined;
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}
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// 柱状图特有
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if (type === 'bar') {
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seriesItem.barMaxWidth = 40;
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seriesItem.itemStyle.borderRadius = stackMode ? [0, 0, 0, 0] : [4, 4, 0, 0];
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if (theme === 'gradient') {
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seriesItem.itemStyle.color = new echarts.graphic.LinearGradient(0, 0, 0, 1, [
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{ offset: 0, color: color },
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{ offset: 1, color: adjustColor(color, 40) }
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]);
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}
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}
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// 数据标签
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if (showLabel) {
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seriesItem.label = {
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show: true,
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position: type === 'bar' ? 'top' : 'top',
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fontSize: 11,
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color: textColor,
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formatter: (params) => {
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if (params.value >= 10000) return (params.value / 10000).toFixed(1) + 'w';
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if (params.value >= 1000) return (params.value / 1000).toFixed(1) + 'k';
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return params.value;
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}
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};
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}
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// 双Y轴：按系列指定左右轴
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if (dualAxis) {
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seriesItem.yAxisIndex = (seriesAxis[origIdx] === 1) ? 1 : 0;
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}
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return seriesItem;
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});
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// 区域分割 - 使用 graphic 组件精确画分割线在柱子间隙中
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const graphicElements = [];
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if (enableSplit) {
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const splitIdx = parseInt(document.getElementById('splitIndex').value) || 3;
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const leftLabel = document.getElementById('leftLabel').value || '左侧';
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const rightLabel = document.getElementById('rightLabel').value || '右侧';
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const splitStyle = document.getElementById('splitStyle').value;
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if (splitIdx < parsedData.categories.length) {
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// 区域背景色用 markArea
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const splitLineColor = theme === 'dark' ? '#ff6b6b' : '#e74c3c';
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if (series.length > 0) {
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series[0].markArea = {
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silent: true,
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data: [
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[
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{
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name: leftLabel,
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xAxis: parsedData.categories[0],
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itemStyle: {
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color: theme === 'dark' ? 'rgba(79,195,247,0.06)' : 'rgba(79,70,229,0.05)',
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borderWidth: 0
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},
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label: {
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show: true,
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position: 'insideTop',
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fontSize: 13,
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fontWeight: 'bold',
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color: theme === 'dark' ? '#4fc3f7' : '#4f46e5',
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offset: [0, 10]
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}
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},
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{ xAxis: parsedData.categories[splitIdx - 1] }
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],
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[
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{
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name: rightLabel,
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xAxis: parsedData.categories[splitIdx],
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itemStyle: {
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color: theme === 'dark' ? 'rgba(255,107,107,0.06)' : 'rgba(239,68,68,0.05)',
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borderWidth: 0
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},
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label: {
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show: true,
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position: 'insideTop',
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fontSize: 13,
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fontWeight: 'bold',
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color: theme === 'dark' ? '#ff6b6b' : '#ef4444',
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offset: [0, 10]
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}
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},
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{ xAxis: parsedData.categories[parsedData.categories.length - 1] }
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]
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]
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};
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}
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// 用 graphic 组件在渲染后画分割线（在柱子间隙中）
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// 先存到全局，在 setOption 后通过 rendered 事件绘制
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window._splitConfig = { splitIdx, splitLineColor, splitStyle, theme };
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} else {
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window._splitConfig = null;
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}
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} else {
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window._splitConfig = null;
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}
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// 图表配置
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const option = {
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backgroundColor: bgColor,
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title: title ? {
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text: title,
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left: 'center',
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top: 15,
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textStyle: {
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color: textColor,
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fontSize: 18,
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fontWeight: 600
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}
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} : undefined,
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tooltip: {
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trigger: 'axis',
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backgroundColor: theme === 'dark' ? 'rgba(30,30,50,0.95)' : 'rgba(255,255,255,0.95)',
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borderColor: theme === 'dark' ? '#555' : '#eee',
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textStyle: { color: textColor },
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axisPointer: {
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type: chartType === 'bar' ? 'shadow' : 'cross',
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crossStyle: { color: '#999' }
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},
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formatter: function(params) {
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let html = `<div style="font-weight:600;margin-bottom:6px">${params[0].axisValue}</div>`;
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params.forEach(p => {
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html += `<div style="display:flex;align-items:center;gap:6px;margin:3px 0">
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<span style="display:inline-block;width:10px;height:10px;border-radius:50%;background:${p.color}"></span>
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<span>${p.seriesName}:</span>
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<span style="font-weight:600">${p.value.toLocaleString()}</span>
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</div>`;
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});
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return html;
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}
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},
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legend: showLegend ? {
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show: true,
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top: title ? 50 : 15,
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textStyle: { color: textColor, fontSize: 12 },
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itemGap: 20,
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icon: 'roundRect'
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} : { show: false },
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grid: {
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left: '3%',
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right: '4%',
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bottom: '3%',
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top: showLegend ? (title ? 90 : 60) : (title ? 60 : 30),
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containLabel: true
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},
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xAxis: {
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type: 'category',
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data: parsedData.categories,
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axisLine: { lineStyle: { color: axisLineColor } },
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axisLabel: {
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color: textColor,
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||
fontSize: 12,
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interval: 0,
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rotate: parsedData.categories.length > 10 ? 30 : 0
|
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},
|
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axisTick: { show: false }
|
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},
|
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yAxis: dualAxis ? [
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{
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type: 'value',
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name: leftAxisName || '左轴',
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nameTextStyle: { color: textColor, fontSize: 11, padding: [0, 0, 0, 4] },
|
||
axisLine: { show: false },
|
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axisTick: { show: false },
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axisLabel: { color: textColor, fontSize: 11 },
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splitLine: {
|
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show: showGrid,
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lineStyle: { color: theme === 'dark' ? '#333' : '#f0f0f0', type: 'dashed' }
|
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}
|
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},
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{
|
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type: 'value',
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name: rightAxisName || '右轴',
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position: 'right',
|
||
nameTextStyle: { color: textColor, fontSize: 11, padding: [0, 4, 0, 0] },
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axisLine: { show: false },
|
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axisTick: { show: false },
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axisLabel: { color: textColor, fontSize: 11 },
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splitLine: { show: false }
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}
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] : {
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type: 'value',
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axisLine: { show: false },
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||
axisTick: { show: false },
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||
axisLabel: { color: textColor, fontSize: 11 },
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||
splitLine: {
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||
show: showGrid,
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||
lineStyle: {
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||
color: theme === 'dark' ? '#333' : '#f0f0f0',
|
||
type: 'dashed'
|
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}
|
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}
|
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},
|
||
series: series,
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||
animationDuration: 800,
|
||
animationEasing: 'cubicOut'
|
||
};
|
||
|
||
chartInstance.setOption(option, true);
|
||
|
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// 绘制分割线（在 category 间隙中）
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||
drawSplitLine();
|
||
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||
refreshPreview();
|
||
}
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||
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||
// ===== 在柱子间隙中精确绘制分割线 =====
|
||
function drawSplitLine() {
|
||
if (!chartInstance || !window._splitConfig) {
|
||
if (chartInstance) {
|
||
chartInstance.setOption({ graphic: { elements: [] } });
|
||
}
|
||
return;
|
||
}
|
||
|
||
const { splitIdx, splitLineColor, splitStyle } = window._splitConfig;
|
||
|
||
// 使用 convertToPixel 获取 category 的像素坐标（x位置）
|
||
const leftX = chartInstance.convertToPixel({ xAxisIndex: 0 }, splitIdx - 1);
|
||
const rightX = chartInstance.convertToPixel({ xAxisIndex: 0 }, splitIdx);
|
||
const midX = (leftX + rightX) / 2;
|
||
|
||
// 使用内部 coordinateSystem 获取精确的绘图区域边界
|
||
// 这是ECharts内部稳定可用的接口
|
||
const gridRect = chartInstance.getModel()
|
||
.getComponent('grid', 0)
|
||
.coordinateSystem.getRect();
|
||
|
||
const yTop = gridRect.y;
|
||
const yBottom = gridRect.y + gridRect.height;
|
||
|
||
// 虚线样式
|
||
let lineDash = null;
|
||
if (splitStyle === 'dashed') lineDash = [8, 4];
|
||
else if (splitStyle === 'dotted') lineDash = [3, 3];
|
||
|
||
chartInstance.setOption({
|
||
graphic: {
|
||
elements: [
|
||
{
|
||
type: 'line',
|
||
shape: {
|
||
x1: midX,
|
||
y1: yTop,
|
||
x2: midX,
|
||
y2: yBottom
|
||
},
|
||
style: {
|
||
stroke: splitLineColor,
|
||
lineWidth: 2,
|
||
lineDash: lineDash
|
||
},
|
||
z: 100
|
||
}
|
||
]
|
||
}
|
||
});
|
||
}
|
||
|
||
// ===== 渲染系列配置 =====
|
||
function renderSeriesConfig() {
|
||
const container = document.getElementById('seriesConfig');
|
||
container.innerHTML = '';
|
||
|
||
seriesOrder.forEach((origIdx, displayIdx) => {
|
||
const name = parsedData.seriesNames[origIdx];
|
||
const color = seriesColors[origIdx];
|
||
const dualAxis = document.getElementById('dualAxis').checked;
|
||
const axisSelect = dualAxis ? `
|
||
<select onchange="updateSeriesAxis(${origIdx}, this.value)" title="所属坐标轴">
|
||
<option value="0" ${seriesAxis[origIdx] === 0 ? 'selected' : ''}>左轴</option>
|
||
<option value="1" ${seriesAxis[origIdx] === 1 ? 'selected' : ''}>右轴</option>
|
||
</select>
|
||
` : '';
|
||
|
||
const item = document.createElement('div');
|
||
item.className = 'series-item';
|
||
item.draggable = true;
|
||
item.dataset.index = displayIdx;
|
||
|
||
item.innerHTML = `
|
||
<span class="drag-handle">⠿</span>
|
||
<span class="series-name">${name}</span>
|
||
<input type="color" value="${color}" onchange="updateSeriesColor(${origIdx}, this.value)">
|
||
<select onchange="updateSeriesType(${origIdx}, this.value)">
|
||
<option value="auto">自动</option>
|
||
<option value="bar">柱状</option>
|
||
<option value="line">折线</option>
|
||
</select>
|
||
${axisSelect}
|
||
`;
|
||
|
||
// 拖拽事件
|
||
item.addEventListener('dragstart', handleDragStart);
|
||
item.addEventListener('dragover', handleDragOver);
|
||
item.addEventListener('drop', handleDrop);
|
||
item.addEventListener('dragend', handleDragEnd);
|
||
|
||
container.appendChild(item);
|
||
});
|
||
}
|
||
|
||
// ===== 拖拽排序 =====
|
||
let draggedItem = null;
|
||
|
||
function handleDragStart(e) {
|
||
draggedItem = this;
|
||
this.classList.add('dragging');
|
||
e.dataTransfer.effectAllowed = 'move';
|
||
}
|
||
|
||
function handleDragOver(e) {
|
||
e.preventDefault();
|
||
e.dataTransfer.dropEffect = 'move';
|
||
|
||
const rect = this.getBoundingClientRect();
|
||
const midY = rect.top + rect.height / 2;
|
||
|
||
if (e.clientY < midY) {
|
||
this.style.borderTopColor = 'var(--primary)';
|
||
this.style.borderTopWidth = '2px';
|
||
} else {
|
||
this.style.borderBottomColor = 'var(--primary)';
|
||
this.style.borderBottomWidth = '2px';
|
||
}
|
||
}
|
||
|
||
function handleDrop(e) {
|
||
e.preventDefault();
|
||
|
||
// 清除样式
|
||
document.querySelectorAll('.series-item').forEach(item => {
|
||
item.style.borderTopColor = '';
|
||
item.style.borderTopWidth = '';
|
||
item.style.borderBottomColor = '';
|
||
item.style.borderBottomWidth = '';
|
||
});
|
||
|
||
if (draggedItem === this) return;
|
||
|
||
const fromIdx = parseInt(draggedItem.dataset.index);
|
||
const toIdx = parseInt(this.dataset.index);
|
||
|
||
// 交换顺序
|
||
const temp = seriesOrder[fromIdx];
|
||
seriesOrder[fromIdx] = seriesOrder[toIdx];
|
||
seriesOrder[toIdx] = temp;
|
||
|
||
renderSeriesConfig();
|
||
updateChart();
|
||
}
|
||
|
||
function handleDragEnd() {
|
||
this.classList.remove('dragging');
|
||
document.querySelectorAll('.series-item').forEach(item => {
|
||
item.style.borderTopColor = '';
|
||
item.style.borderTopWidth = '';
|
||
item.style.borderBottomColor = '';
|
||
item.style.borderBottomWidth = '';
|
||
});
|
||
}
|
||
|
||
// ===== 系列操作 =====
|
||
function updateSeriesColor(origIdx, color) {
|
||
seriesColors[origIdx] = color;
|
||
updateChart();
|
||
}
|
||
|
||
function updateSeriesType(origIdx, type) {
|
||
// 存储自定义类型覆盖
|
||
if (!window.seriesTypeOverrides) window.seriesTypeOverrides = {};
|
||
window.seriesTypeOverrides[origIdx] = type;
|
||
updateChart();
|
||
}
|
||
|
||
// ===== 双Y轴 =====
|
||
function onDualAxisChange() {
|
||
const on = document.getElementById('dualAxis').checked;
|
||
document.getElementById('rightAxisGroup').style.display = on ? 'block' : 'none';
|
||
renderSeriesConfig(); // 显示/隐藏系列轴选择
|
||
updateChart();
|
||
}
|
||
|
||
function updateSeriesAxis(origIdx, axis) {
|
||
seriesAxis[origIdx] = parseInt(axis) || 0;
|
||
updateChart();
|
||
}
|
||
|
||
// ===== 工具函数 =====
|
||
function adjustColor(hex, amount) {
|
||
hex = hex.replace('#', '');
|
||
const num = parseInt(hex, 16);
|
||
let r = Math.min(255, ((num >> 16) & 0xff) + amount);
|
||
let g = Math.min(255, ((num >> 8) & 0xff) + amount);
|
||
let b = Math.min(255, (num & 0xff) + amount);
|
||
return `rgb(${r},${g},${b})`;
|
||
}
|
||
|
||
function loadSampleData() {
|
||
// 循环切换示例
|
||
const currentIdx = sampleDataSets.findIndex(s => s.data === document.getElementById('dataInput').value);
|
||
const nextIdx = (currentIdx + 1) % sampleDataSets.length;
|
||
document.getElementById('dataInput').value = sampleDataSets[nextIdx].data;
|
||
generateChart();
|
||
}
|
||
|
||
function clearData() {
|
||
document.getElementById('dataInput').value = '';
|
||
document.getElementById('chartArea').innerHTML = `
|
||
<div class="placeholder">
|
||
<p>📊</p>
|
||
<p>输入数据后点击"生成图表"</p>
|
||
</div>
|
||
`;
|
||
if (chartInstance) {
|
||
chartInstance.dispose();
|
||
chartInstance = null;
|
||
}
|
||
parsedData = null;
|
||
document.getElementById('seriesConfig').innerHTML = '<p class="hint-text">生成图表后可在此调整各系列的顺序和颜色</p>';
|
||
}
|
||
|
||
// ===== 导出图表（SVG 专用） =====
|
||
function exportChartSvg() {
|
||
if (!chartInstance) {
|
||
alert('请先生成图表');
|
||
return;
|
||
}
|
||
const svgChart = echarts.init(document.createElement('div'), null, { renderer: 'svg' });
|
||
svgChart.setOption(chartInstance.getOption());
|
||
const url = svgChart.getDataURL({ type: 'svg', pixelRatio: 2 });
|
||
const a = document.createElement('a');
|
||
a.href = url;
|
||
a.download = buildExportFilename('chart', 'svg');
|
||
a.click();
|
||
svgChart.dispose();
|
||
}
|
||
|
||
// ===== 导出设置（分辨率/历史/命名） =====
|
||
const EXPORT_PRESETS = {
|
||
'original': { label: '原始大小', w: 0, h: 0 },
|
||
'1920x1080': { label: '1920 × 1080', w: 1920, h: 1080 },
|
||
'1280x720': { label: '1280 × 720', w: 1280, h: 720 },
|
||
'1024x768': { label: '1024 × 768', w: 1024, h: 768 },
|
||
'800x600': { label: '800 × 600', w: 800, h: 600 },
|
||
'custom': { label: '自定义', w: null, h: null }
|
||
};
|
||
const HISTORY_KEY = 'dct_export_history';
|
||
const HISTORY_MAX = 5;
|
||
|
||
// 当前生效的分辨率 {w, h}（0 表示原始大小）
|
||
function getResolution() {
|
||
const preset = document.getElementById('exportPreset').value;
|
||
if (preset === 'original') return { w: 0, h: 0 };
|
||
if (preset === 'custom') {
|
||
const w = parseInt(document.getElementById('customWidth').value) || 0;
|
||
const h = parseInt(document.getElementById('customHeight').value) || 0;
|
||
return { w, h };
|
||
}
|
||
const p = EXPORT_PRESETS[preset];
|
||
return { w: p.w, h: p.h };
|
||
}
|
||
|
||
function onExportPresetChange() {
|
||
const preset = document.getElementById('exportPreset').value;
|
||
document.getElementById('customResGroup').style.display = preset === 'custom' ? 'block' : 'none';
|
||
refreshExportHint();
|
||
refreshPreview();
|
||
}
|
||
|
||
// 导出设置面板展开/折叠（默认折叠）
|
||
let exportSettingsOpen = false;
|
||
function toggleExportSettings() {
|
||
exportSettingsOpen = !exportSettingsOpen;
|
||
const body = document.getElementById('exportSettingsBody');
|
||
const t = document.getElementById('exportToggle');
|
||
body.style.display = exportSettingsOpen ? 'block' : 'none';
|
||
t.textContent = exportSettingsOpen ? '▾' : '▸';
|
||
}
|
||
|
||
// 一键恢复默认（重置全部设置，历史记录保留）
|
||
function resetExportSettings() {
|
||
document.getElementById('exportPreset').value = 'original';
|
||
document.getElementById('customResGroup').style.display = 'none';
|
||
document.getElementById('customWidth').value = '';
|
||
document.getElementById('customHeight').value = '';
|
||
document.getElementById('exportFilename').value = '';
|
||
document.getElementById('exportHistory').value = '';
|
||
refreshExportHint();
|
||
refreshPreview();
|
||
}
|
||
|
||
function onCustomResInput() {
|
||
refreshExportHint();
|
||
refreshPreview();
|
||
const { w, h } = getResolution();
|
||
if (w > 0 && h > 0) saveHistory(w, h);
|
||
}
|
||
|
||
// 历史分辨率管理（最多 5 个，存 localStorage）
|
||
function loadHistory() {
|
||
try { return JSON.parse(localStorage.getItem(HISTORY_KEY)) || []; } catch (e) { return []; }
|
||
}
|
||
|
||
function saveHistory(w, h) {
|
||
if (!w || !h) return;
|
||
let hist = loadHistory();
|
||
const key = w + 'x' + h;
|
||
hist = hist.filter(x => x.key !== key);
|
||
hist.unshift({ key, w, h });
|
||
hist = hist.slice(0, HISTORY_MAX);
|
||
localStorage.setItem(HISTORY_KEY, JSON.stringify(hist));
|
||
renderHistory();
|
||
}
|
||
|
||
function renderHistory() {
|
||
const sel = document.getElementById('exportHistory');
|
||
const hist = loadHistory();
|
||
const cur = sel.value;
|
||
sel.innerHTML = hist.length
|
||
? hist.map(h => `<option value="${h.key}">${h.w} × ${h.h}</option>`).join('')
|
||
: '<option value="">— 暂无历史 —</option>';
|
||
if (cur && hist.some(h => h.key === cur)) sel.value = cur;
|
||
}
|
||
|
||
function onHistorySelect() {
|
||
const v = document.getElementById('exportHistory').value;
|
||
if (!v) return;
|
||
const [w, h] = v.split('x').map(Number);
|
||
const preset = Object.entries(EXPORT_PRESETS).find(([k, p]) => p.w === w && p.h === h);
|
||
document.getElementById('exportPreset').value = preset ? preset[0] : 'custom';
|
||
if (preset) {
|
||
document.getElementById('customResGroup').style.display = 'none';
|
||
} else {
|
||
document.getElementById('customResGroup').style.display = 'block';
|
||
document.getElementById('customWidth').value = w;
|
||
document.getElementById('customHeight').value = h;
|
||
}
|
||
refreshExportHint();
|
||
refreshPreview();
|
||
}
|
||
|
||
// 文件名：手动填写优先，否则按日期时间自动命名（每次不同）
|
||
function buildExportFilename(prefix, ext) {
|
||
ext = ext || 'png';
|
||
const manual = document.getElementById('exportFilename').value.trim();
|
||
if (manual) {
|
||
return /\.[a-zA-Z0-9]+$/.test(manual) ? manual : manual + '.' + ext;
|
||
}
|
||
const d = new Date();
|
||
const pad = n => String(n).padStart(2, '0');
|
||
return `${prefix}_${d.getFullYear()}${pad(d.getMonth()+1)}${pad(d.getDate())}_${pad(d.getHours())}${pad(d.getMinutes())}${pad(d.getSeconds())}.${ext}`;
|
||
}
|
||
|
||
// 把源图 contain 居中缩放到目标分辨率画布（自动适配深色背景）
|
||
function applyResolution(srcCanvas, tw, th) {
|
||
if (!tw || !th) return srcCanvas;
|
||
let bg = '#ffffff';
|
||
try {
|
||
const d = srcCanvas.getContext('2d').getImageData(0, 0, 1, 1).data;
|
||
if (d[3] > 0 && (d[0] + d[1] + d[2]) / 3 < 100) bg = '#1a1a2e';
|
||
} catch (e) {}
|
||
const c = document.createElement('canvas');
|
||
c.width = tw; c.height = th;
|
||
const ctx = c.getContext('2d');
|
||
ctx.fillStyle = bg;
|
||
ctx.fillRect(0, 0, tw, th);
|
||
const scale = Math.min(tw / srcCanvas.width, th / srcCanvas.height);
|
||
const dw = Math.round(srcCanvas.width * scale);
|
||
const dh = Math.round(srcCanvas.height * scale);
|
||
ctx.drawImage(srcCanvas, Math.round((tw - dw) / 2), Math.round((th - dh) / 2), dw, dh);
|
||
return c;
|
||
}
|
||
|
||
// 获取当前模式源 canvas（异步）
|
||
function getSourceCanvas() {
|
||
return new Promise((resolve, reject) => {
|
||
if (currentMode === 'chart') {
|
||
if (!chartInstance) return reject(new Error('请先生成图表'));
|
||
const cvs = chartInstance.getDom().querySelector('canvas');
|
||
if (!cvs) return reject(new Error('图表未渲染'));
|
||
resolve(cvs);
|
||
} else if (currentMode === 'table') {
|
||
if (!tableImageBlob) return reject(new Error('请先生成表格'));
|
||
const url = URL.createObjectURL(tableImageBlob);
|
||
const img = new Image();
|
||
img.onload = () => {
|
||
const c = document.createElement('canvas');
|
||
c.width = img.width; c.height = img.height;
|
||
c.getContext('2d').drawImage(img, 0, 0);
|
||
URL.revokeObjectURL(url);
|
||
resolve(c);
|
||
};
|
||
img.onerror = () => { URL.revokeObjectURL(url); reject(new Error('表格图片加载失败')); };
|
||
img.src = url;
|
||
} else {
|
||
if (!combinedCanvas) return reject(new Error('请先生成合并图'));
|
||
resolve(combinedCanvas);
|
||
}
|
||
});
|
||
}
|
||
|
||
// 生成最终导出 canvas（应用当前分辨率）
|
||
function getExportCanvas() {
|
||
return getSourceCanvas().then(src => {
|
||
const { w, h } = getResolution();
|
||
return applyResolution(src, w, h);
|
||
});
|
||
}
|
||
|
||
// 统一下载图片
|
||
function exportCurrent(prefix) {
|
||
getExportCanvas().then(canvas => {
|
||
const a = document.createElement('a');
|
||
a.href = canvas.toDataURL('image/png');
|
||
a.download = buildExportFilename(prefix);
|
||
a.click();
|
||
const { w, h } = getResolution();
|
||
if (w > 0 && h > 0) saveHistory(w, h);
|
||
}).catch(err => alert(err.message));
|
||
}
|
||
|
||
// 导出分辨率提示 + 折叠栏摘要
|
||
function refreshExportHint() {
|
||
const { w, h } = getResolution();
|
||
const hint = document.getElementById('exportResHint');
|
||
if (hint) hint.textContent = w > 0 && h > 0 ? `导出分辨率：${w} × ${h}（原图居中缩放）` : '导出分辨率：原始大小';
|
||
const sum = document.getElementById('exportSummary');
|
||
if (sum) sum.textContent = w > 0 && h > 0 ? `${w} × ${h}` : '原始大小';
|
||
}
|
||
|
||
// 刷新导出预览：以原图为中心，居中展示保存后的图
|
||
function refreshPreview() {
|
||
const box = document.getElementById('exportPreviewBox');
|
||
const inner = document.getElementById('exportPreviewInner');
|
||
const title = document.getElementById('exportPreviewTitle');
|
||
if (!box || !inner) return;
|
||
getExportCanvas().then(canvas => {
|
||
const { w, h } = getResolution();
|
||
const url = canvas.toDataURL('image/png');
|
||
const sizeTag = w > 0 && h > 0 ? ` <span class="export-preview-size">${w} × ${h}</span>` : '';
|
||
title.innerHTML = `📐 导出预览${sizeTag}`;
|
||
inner.innerHTML = `<img src="${url}" alt="导出预览">`;
|
||
box.style.display = 'block';
|
||
}).catch(() => { box.style.display = 'none'; });
|
||
}
|
||
|
||
// ===== 模式切换 =====
|
||
function switchMode(mode) {
|
||
currentMode = mode;
|
||
|
||
// 更新按钮状态
|
||
document.getElementById('btnChartMode').classList.toggle('active', mode === 'chart');
|
||
document.getElementById('btnTableMode').classList.toggle('active', mode === 'table');
|
||
document.getElementById('btnCombineMode').classList.toggle('active', mode === 'combine');
|
||
|
||
// 显示/隐藏配置区
|
||
document.getElementById('dataInputSection').style.display = mode === 'combine' ? 'none' : 'block';
|
||
document.getElementById('chartConfigSection').style.display = mode === 'chart' ? 'block' : 'none';
|
||
document.getElementById('tableConfigSection').style.display = mode === 'table' ? 'block' : 'none';
|
||
document.getElementById('seriesConfigSection').style.display = mode === 'chart' ? 'block' : 'none';
|
||
document.getElementById('splitConfigSection').style.display = mode === 'chart' ? 'block' : 'none';
|
||
document.getElementById('combineConfigSection').style.display = mode === 'combine' ? 'block' : 'none';
|
||
|
||
// 更新生成按钮
|
||
const btnGenerate = document.getElementById('btnGenerate');
|
||
if (mode === 'combine') {
|
||
btnGenerate.style.display = 'none'; // 双图模式用自己的按钮
|
||
} else {
|
||
btnGenerate.style.display = '';
|
||
btnGenerate.textContent = mode === 'chart' ? '🎨 生成图表' : '📋 生成表格';
|
||
}
|
||
|
||
// 更新导出按钮
|
||
const btnExportSvg = document.getElementById('btnExportSvg');
|
||
btnExportSvg.style.display = mode === 'chart' ? 'inline-flex' : 'none';
|
||
|
||
// 重新生成
|
||
generate();
|
||
}
|
||
|
||
// ===== 统一生成入口 =====
|
||
function generate() {
|
||
if (currentMode === 'chart') {
|
||
generateChart();
|
||
} else if (currentMode === 'table') {
|
||
generateTable();
|
||
} else {
|
||
generateCombine();
|
||
}
|
||
}
|
||
|
||
// ===== 更新字体大小显示 =====
|
||
function updateFontSize() {
|
||
const val = document.getElementById('tableFontSize').value;
|
||
document.getElementById('fontSizeValue').textContent = val;
|
||
}
|
||
|
||
// ===== 生成表格 =====
|
||
function generateTable() {
|
||
const rawText = document.getElementById('dataInput').value;
|
||
if (!rawText.trim()) {
|
||
alert('请输入数据');
|
||
return;
|
||
}
|
||
|
||
const params = {
|
||
data: rawText,
|
||
title: document.getElementById('tableTitle').value,
|
||
theme: document.getElementById('tableTheme').value,
|
||
fontSize: parseInt(document.getElementById('tableFontSize').value) || 14,
|
||
stripeRows: document.getElementById('stripeRows').checked,
|
||
borderStyle: document.getElementById('borderStyle').value,
|
||
pixelRatio: 2
|
||
};
|
||
|
||
const chartArea = document.getElementById('chartArea');
|
||
chartArea.innerHTML = '<div class="placeholder"><p>⏳</p><p>正在生成表格...</p></div>';
|
||
|
||
fetch('/api/table', {
|
||
method: 'POST',
|
||
headers: { 'Content-Type': 'application/json' },
|
||
body: JSON.stringify(params)
|
||
})
|
||
.then(res => {
|
||
if (!res.ok) throw new Error('表格生成失败');
|
||
return res.blob();
|
||
})
|
||
.then(blob => {
|
||
tableImageBlob = blob;
|
||
const url = URL.createObjectURL(blob);
|
||
chartArea.innerHTML = `<div class="table-preview"><img src="${url}" alt="表格预览"></div>`;
|
||
refreshPreview();
|
||
})
|
||
.catch(err => {
|
||
chartArea.innerHTML = `<div class="placeholder"><p>❌</p><p>${err.message}</p></div>`;
|
||
});
|
||
}
|
||
|
||
// ===== 更新表格（配置变更时） =====
|
||
function updateTable() {
|
||
if (currentMode === 'table' && document.getElementById('dataInput').value.trim()) {
|
||
generateTable();
|
||
}
|
||
}
|
||
|
||
// ===== 统一导出图片 =====
|
||
function exportImage(format) {
|
||
if (format === 'svg') {
|
||
if (currentMode !== 'chart') {
|
||
alert('SVG 仅图表模式支持');
|
||
return;
|
||
}
|
||
exportChartSvg();
|
||
return;
|
||
}
|
||
const prefix = currentMode === 'chart' ? 'chart' : currentMode === 'table' ? 'table' : 'combine';
|
||
exportCurrent(prefix);
|
||
}
|
||
|
||
// ===== 导出表格（走统一导出） =====
|
||
function exportTable(format) {
|
||
exportCurrent('table');
|
||
}
|
||
|
||
// ===== 快速切换风格 =====
|
||
function quickSwitchTheme(theme) {
|
||
// 更新按钮状态
|
||
document.querySelectorAll('.theme-btn').forEach(btn => {
|
||
btn.classList.toggle('active', btn.dataset.theme === theme);
|
||
});
|
||
|
||
if (currentMode === 'chart') {
|
||
// 图表模式：更新主题选择器并重新渲染
|
||
document.getElementById('themeStyle').value = theme;
|
||
updateChart();
|
||
} else if (currentMode === 'table') {
|
||
// 表格模式：更新主题选择器并重新请求
|
||
document.getElementById('tableTheme').value = theme;
|
||
updateTable();
|
||
}
|
||
// 双图合并模式：仅切换按钮高亮，不联动（两图各自独立主题）
|
||
}
|
||
|
||
// ===== 同步风格按钮状态（下拉框变更时） =====
|
||
function syncThemeButtons(theme) {
|
||
document.querySelectorAll('.theme-btn').forEach(btn => {
|
||
btn.classList.toggle('active', btn.dataset.theme === theme);
|
||
});
|
||
}
|
||
|
||
// ===== 初始化风格按钮状态 =====
|
||
function initThemeButtons() {
|
||
// 默认激活 default
|
||
document.querySelectorAll('.theme-btn').forEach(btn => {
|
||
btn.classList.toggle('active', btn.dataset.theme === 'default');
|
||
});
|
||
}
|
||
|
||
// 页面加载时初始化
|
||
document.addEventListener('DOMContentLoaded', () => {
|
||
initThemeButtons();
|
||
});
|
||
|
||
// ===== 双图合并 =====
|
||
let combinedCanvas = null;
|
||
|
||
// 构建单个子图的 echarts option（不依赖全局状态，双图模式专用）
|
||
function buildCombineChartOption(dataText, cfg) {
|
||
const parsed = parseData(dataText);
|
||
if (!parsed) return null;
|
||
|
||
const {
|
||
title = '', chartType = 'bar', theme = 'default',
|
||
showLegend = true, showGrid = true, showLabel = false,
|
||
stackMode = false, smoothLine = true
|
||
} = cfg;
|
||
|
||
const bgColor = theme === 'dark' ? '#1a1a2e' : '#ffffff';
|
||
const textColor = theme === 'dark' ? '#e0e0e0' : '#333333';
|
||
const axisLineColor = theme === 'dark' ? '#444' : '#ddd';
|
||
const palette = colorPalettes[theme] || colorPalettes.default;
|
||
|
||
const series = parsed.seriesNames.map((name, idx) => {
|
||
const color = palette[idx % palette.length];
|
||
let type = chartType === 'bar-line' ? (idx % 2 === 0 ? 'bar' : 'line') : chartType;
|
||
|
||
const s = {
|
||
name,
|
||
type,
|
||
data: [...parsed.seriesData[name]],
|
||
itemStyle: { color },
|
||
emphasis: { focus: 'series' }
|
||
};
|
||
|
||
if (stackMode) s.stack = 'total';
|
||
|
||
if (type === 'line') {
|
||
s.smooth = smoothLine;
|
||
s.lineStyle = { width: 3 };
|
||
s.symbolSize = 8;
|
||
s.areaStyle = theme === 'gradient' ? { opacity: 0.15 } : undefined;
|
||
}
|
||
|
||
if (type === 'bar') {
|
||
s.barMaxWidth = 40;
|
||
s.itemStyle.borderRadius = stackMode ? [0, 0, 0, 0] : [4, 4, 0, 0];
|
||
if (theme === 'gradient') {
|
||
s.itemStyle.color = new echarts.graphic.LinearGradient(0, 0, 0, 1, [
|
||
{ offset: 0, color },
|
||
{ offset: 1, color: adjustColor(color, 40) }
|
||
]);
|
||
}
|
||
}
|
||
|
||
if (showLabel) {
|
||
s.label = {
|
||
show: true,
|
||
position: 'top',
|
||
fontSize: 11,
|
||
color: textColor,
|
||
formatter: (p) => {
|
||
if (p.value >= 10000) return (p.value / 10000).toFixed(1) + 'w';
|
||
if (p.value >= 1000) return (p.value / 1000).toFixed(1) + 'k';
|
||
return p.value;
|
||
}
|
||
};
|
||
}
|
||
|
||
return s;
|
||
});
|
||
|
||
return {
|
||
backgroundColor: bgColor,
|
||
title: title ? {
|
||
text: title,
|
||
left: 'center',
|
||
top: 10,
|
||
textStyle: { color: textColor, fontSize: 16, fontWeight: 600 }
|
||
} : undefined,
|
||
tooltip: {
|
||
trigger: 'axis',
|
||
backgroundColor: theme === 'dark' ? 'rgba(30,30,50,0.95)' : 'rgba(255,255,255,0.95)',
|
||
borderColor: theme === 'dark' ? '#555' : '#eee',
|
||
textStyle: { color: textColor }
|
||
},
|
||
legend: showLegend ? {
|
||
show: true,
|
||
top: title ? 40 : 10,
|
||
textStyle: { color: textColor, fontSize: 12 },
|
||
itemGap: 20,
|
||
icon: 'roundRect'
|
||
} : { show: false },
|
||
grid: {
|
||
left: '3%', right: '4%', bottom: '3%',
|
||
top: showLegend ? (title ? 70 : 45) : (title ? 50 : 30),
|
||
containLabel: true
|
||
},
|
||
xAxis: {
|
||
type: 'category',
|
||
data: parsed.categories,
|
||
axisLine: { lineStyle: { color: axisLineColor } },
|
||
axisLabel: { color: textColor, fontSize: 11, interval: 0, rotate: parsed.categories.length > 10 ? 30 : 0 },
|
||
axisTick: { show: false }
|
||
},
|
||
yAxis: {
|
||
type: 'value',
|
||
axisLine: { show: false },
|
||
axisTick: { show: false },
|
||
axisLabel: { color: textColor, fontSize: 11 },
|
||
splitLine: { show: showGrid, lineStyle: { color: theme === 'dark' ? '#333' : '#f0f0f0', type: 'dashed' } }
|
||
},
|
||
series,
|
||
animation: false
|
||
};
|
||
}
|
||
|
||
// 根据数据量估算子图尺寸
|
||
function measureCombineChart(dataText) {
|
||
const p = parseData(dataText);
|
||
if (!p) return { w: 600, h: 400 };
|
||
const w = Math.min(900, Math.max(500, p.categories.length * 70 + 140));
|
||
return { w, h: 400 };
|
||
}
|
||
|
||
// 生成合并图
|
||
function generateCombine() {
|
||
const d1 = document.getElementById('combineData1').value.trim();
|
||
const d2 = document.getElementById('combineData2').value.trim();
|
||
if (!d1 || !d2) return;
|
||
|
||
const direction = document.querySelector('input[name="combineDirection"]:checked').value;
|
||
const gap = 24;
|
||
|
||
const readCfg = (n) => ({
|
||
title: document.getElementById('combineTitle' + n).value,
|
||
chartType: document.getElementById('combineType' + n).value,
|
||
theme: document.getElementById('combineTheme' + n).value,
|
||
showLegend: document.getElementById('combineLegend' + n).checked,
|
||
showGrid: document.getElementById('combineGrid' + n).checked,
|
||
showLabel: document.getElementById('combineLabel' + n).checked,
|
||
stackMode: document.getElementById('combineStack' + n).checked
|
||
});
|
||
|
||
const chartArea = document.getElementById('chartArea');
|
||
chartArea.innerHTML = '<div class="placeholder"><p>⏳</p><p>正在合并...</p></div>';
|
||
|
||
const renderOne = (dataText, cfg, w, h) => new Promise((resolve, reject) => {
|
||
const option = buildCombineChartOption(dataText, cfg);
|
||
if (!option) { reject(new Error('数据格式错误')); return; }
|
||
const holder = document.createElement('div');
|
||
holder.style.cssText = `position:absolute;left:-9999px;top:0;width:${w}px;height:${h}px;`;
|
||
document.body.appendChild(holder);
|
||
const chart = echarts.init(holder, null, { renderer: 'canvas' });
|
||
chart.setOption(option);
|
||
setTimeout(() => {
|
||
const srcCvs = holder.querySelector('canvas');
|
||
if (!srcCvs) { reject(new Error('子图渲染失败')); return; }
|
||
// 关键：先把内容复制到独立 canvas 再 dispose。
|
||
// 直接 resolve 原 canvas 的话，Promise 微任务在 chart.dispose() 之后才执行，
|
||
// 此时 canvas 内容已被 echarts 清空，合并出来就是白图。
|
||
const copy = document.createElement('canvas');
|
||
copy.width = srcCvs.width;
|
||
copy.height = srcCvs.height;
|
||
copy.getContext('2d').drawImage(srcCvs, 0, 0);
|
||
chart.dispose();
|
||
holder.remove();
|
||
resolve(copy);
|
||
}, 80);
|
||
});
|
||
|
||
const m1 = measureCombineChart(d1);
|
||
const m2 = measureCombineChart(d2);
|
||
|
||
Promise.all([
|
||
renderOne(d1, readCfg(1), m1.w, m1.h),
|
||
renderOne(d2, readCfg(2), m2.w, m2.h)
|
||
]).then(([c1, c2]) => {
|
||
let W, H, r1, r2;
|
||
if (direction === 'vertical') {
|
||
// 竖排（上下）：等宽
|
||
const tw = Math.max(c1.width, c2.width);
|
||
r1 = { w: tw, h: Math.round(c1.height * tw / c1.width) };
|
||
r2 = { w: tw, h: Math.round(c2.height * tw / c2.width) };
|
||
W = tw; H = r1.h + r2.h + gap;
|
||
} else {
|
||
// 横排（左右）：等高
|
||
const th = Math.max(c1.height, c2.height);
|
||
r1 = { w: Math.round(c1.width * th / c1.height), h: th };
|
||
r2 = { w: Math.round(c2.width * th / c2.height), h: th };
|
||
W = r1.w + r2.w + gap; H = th;
|
||
}
|
||
|
||
const canvas = document.createElement('canvas');
|
||
canvas.width = W;
|
||
canvas.height = H;
|
||
const ctx = canvas.getContext('2d');
|
||
ctx.fillStyle = '#ffffff';
|
||
ctx.fillRect(0, 0, W, H);
|
||
|
||
if (direction === 'vertical') {
|
||
ctx.drawImage(c1, 0, 0, r1.w, r1.h);
|
||
ctx.drawImage(c2, 0, r1.h + gap, r2.w, r2.h);
|
||
} else {
|
||
ctx.drawImage(c1, 0, 0, r1.w, r1.h);
|
||
ctx.drawImage(c2, r1.w + gap, 0, r2.w, r2.h);
|
||
}
|
||
|
||
combinedCanvas = canvas;
|
||
const url = canvas.toDataURL('image/png');
|
||
chartArea.innerHTML = `<div class="table-preview"><img src="${url}" alt="合并图预览" style="max-width:100%;"></div>`;
|
||
refreshPreview();
|
||
}).catch(err => {
|
||
chartArea.innerHTML = `<div class="placeholder"><p>❌</p><p>${err.message}</p></div>`;
|
||
});
|
||
}
|
||
|
||
// 导出合并图（走统一导出）
|
||
function exportCombine() {
|
||
exportCurrent('combine');
|
||
}
|