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<!doctype html>
<html lang="zh-CN">
<head>
<meta content="text/html; charset=UTF-8" http-equiv="content-type" />
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no,viewport-fit=cover">
<title>jmGraph 工作流流程图（DAG）示例</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; overflow: hidden; }
body {
display: flex;
background: #f8fafc;
color: #1e293b;
font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
font-size: 13px;
}
/* ---------- 左侧：节点面板 ---------- */
.palette {
width: 200px;
min-width: 200px;
height: 100vh;
background: #fff;
border-right: 1px solid #e2e8f0;
padding: 14px 12px;
overflow-y: auto;
}
.palette h3 { font-size: 13px; color: #0f172a; margin-bottom: 4px; }
.palette .tip { font-size: 11px; color: #94a3b8; line-height: 1.6; margin-bottom: 10px; }
.p-item {
display: flex; align-items: center; gap: 8px;
border: 1px solid #e2e8f0; border-radius: 8px;
padding: 8px 10px; margin-bottom: 8px;
cursor: grab; user-select: none;
transition: box-shadow .15s, transform .15s;
background: #fff;
}
.p-item:hover { box-shadow: 0 2px 10px rgba(16,24,40,.1); transform: translateY(-1px); }
.p-item:active { cursor: grabbing; }
.p-icon {
width: 24px; height: 24px; border-radius: 6px; color: #fff;
display: flex; align-items: center; justify-content: center;
font-size: 13px; font-weight: 700; flex-shrink: 0;
}
.p-name { font-size: 12px; font-weight: 600; }
.p-desc { font-size: 10px; color: #94a3b8; }
/* ---------- 中间：画布 ---------- */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; height: 100vh; position: relative; }
.toolbar {
display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
padding: 8px 12px; background: #fff; border-bottom: 1px solid #e2e8f0;
}
.toolbar .group { display: flex; align-items: center; gap: 4px; }
.toolbar .sep { width: 1px; height: 18px; background: #e2e8f0; margin: 0 4px; }
.toolbar .title { font-weight: 700; color: #0f172a; margin-right: 6px; }
.toolbar .zoom { font-size: 12px; color: #64748b; min-width: 44px; text-align: center; }
button {
border: 1px solid #e2e8f0; background: #fff; color: #334155;
padding: 4px 10px; border-radius: 6px; font-size: 12px; cursor: pointer;
font-family: inherit; transition: background .15s, border-color .15s;
}
button:hover { background: #f1f5f9; border-color: #cbd5e1; }
button.primary { background: #2563eb; border-color: #2563eb; color: #fff; }
button.primary:hover { background: #1d4ed8; }
button.on { background: #eff6ff; border-color: #93c5fd; color: #1d4ed8; font-weight: 600; }
.canvas-wrap { flex: 1; position: relative; min-height: 0; overflow: hidden; }
#canvas { width: 100%; height: 100%; }
.empty {
position: absolute; inset: 0; display: none;
flex-direction: column; align-items: center; justify-content: center;
color: #cbd5e1; pointer-events: none; font-size: 13px; gap: 6px;
}
.empty .ico { font-size: 40px; }
.minimap {
position: absolute; right: 12px; bottom: 12px;
border: 1px solid #e2e8f0; border-radius: 8px; overflow: hidden;
box-shadow: 0 2px 10px rgba(16,24,40,.12); background: #f1f5f9;
}
.minimap canvas { display: block; cursor: pointer; }
/* ---------- 右侧：详情 ---------- */
.panel {
width: 260px; min-width: 260px; height: 100vh; overflow-y: auto;
background: #fff; border-left: 1px solid #e2e8f0; padding: 14px 12px;
}
.panel h4 { font-size: 12px; color: #94a3b8; text-transform: uppercase; letter-spacing: 1px; margin: 14px 0 8px; }
.panel h4:first-child { margin-top: 0; }
.kv { display: flex; font-size: 12px; padding: 3px 0; }
.kv b { color: #64748b; font-weight: 500; width: 62px; flex-shrink: 0; }
.kv span { color: #0f172a; word-break: break-all; }
.none { font-size: 12px; color: #cbd5e1; }
.rename { display: flex; gap: 6px; margin-top: 8px; }
.rename input {
flex: 1; border: 1px solid #e2e8f0; border-radius: 6px; padding: 4px 8px;
font-size: 12px; font-family: inherit; min-width: 0;
}
.rename input:focus { outline: none; border-color: #93c5fd; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 12px; }
.legend i {
width: 10px; height: 10px; border-radius: 50%; display: inline-block;
margin-right: 5px; vertical-align: -1px;
}
.legend span { font-size: 11px; color: #475569; }
.log {
background: #0f172a; border-radius: 8px; padding: 8px;
height: 200px; overflow-y: auto; font-size: 11px; line-height: 1.7;
font-family: Consolas, Menlo, monospace;
}
.log div { color: #94a3b8; }
.log .ok { color: #4ade80; }
.log .error { color: #f87171; }
.log .warn { color: #fbbf24; }
.log .info { color: #7dd3fc; }
/* ---------- 右键菜单 ---------- */
.menu {
position: absolute; display: none; z-index: 99;
background: #fff; border: 1px solid #e2e8f0; border-radius: 8px;
box-shadow: 0 8px 24px rgba(16,24,40,.16); padding: 4px; min-width: 132px;
}
.menu div { padding: 6px 10px; border-radius: 6px; font-size: 12px; cursor: pointer; }
.menu div:hover { background: #f1f5f9; }
.menu div.danger { color: #dc2626; }
.menu div.danger:hover { background: #fef2f2; }
/* ---------- 移动端适配 ---------- */
.canvas-wrap, #canvas {
touch-action: none;
-webkit-touch-callout: none;
-webkit-user-select: none;
user-select: none;
}
.drawer-toggle { display: none; }
.backdrop {
position: fixed; inset: 0; background: rgba(15,23,42,.42);
z-index: 55; opacity: 0; visibility: hidden; transition: opacity .22s;
}
.backdrop.show { opacity: 1; visibility: visible; }
.hint {
position: fixed; left: 50%; bottom: 14px; transform: translateX(-50%);
z-index: 58; background: #0f172a; color: #fff; padding: 8px 14px;
border-radius: 999px; font-size: 12px; box-shadow: 0 4px 16px rgba(16,24,40,.3);
display: none; max-width: 90%; text-align: center;
}
.hint.show { display: block; }
@media (max-width: 820px) {
body { font-size: 12px; }
.palette, .panel {
position: fixed; top: 0; bottom: 0; z-index: 60;
width: 78%; max-width: 320px; min-width: 0; height: 100%;
box-shadow: 0 0 28px rgba(16,24,40,.2);
transition: transform .25s ease; will-change: transform;
}
.palette { left: 0; transform: translateX(-106%); }
.panel { right: 0; transform: translateX(106%); }
.palette.open, .panel.open { transform: translateX(0); }
.drawer-toggle { display: inline-flex; }
.main { height: 100%; }
.toolbar { padding: 6px 8px; gap: 6px; }
.toolbar .title { display: none; }
.toolbar .sep { display: none; }
.toolbar .group { gap: 4px; }
button { padding: 5px 9px; font-size: 12px; }
.zoom { min-width: 38px; }
.minimap { display: none; }
.p-item.active { box-shadow: 0 0 0 2px #2563eb inset; }
html, body { height: 100%; }
}
@media (max-width: 820px) and (display-mode: browser) {
/* 处理移动端地址栏导致的 100vh 抖动 */
.palette, .panel, .main { height: 100dvh; }
}
</style>
</head>
<body>
<aside class="palette">
<h3>节点面板</h3>
<div class="tip">编辑模式下拖拽到画布添加节点；拖动节点边上的连接点可建立依赖。</div>
<div id="palette"></div>
</aside>
<section class="main">
<div class="toolbar">
<button id="btnPalette" class="drawer-toggle" title="节点面板">☰ 节点</button>
<button id="btnPanel" class="drawer-toggle" title="详情">ℹ 详情</button>
<span class="title">jmGraph 流程图</span>
<div class="group">
<button id="btnMode">✏️ 编辑模式</button>
</div>
<div class="sep"></div>
<div class="group">
<button id="btnRun" class="primary">▶ 执行流程</button>
<button id="btnResetRun">重置状态</button>
</div>
<div class="sep"></div>
<div class="group">
<button id="btnLayout">自动布局</button>
<button id="btnFit">适应视图</button>
</div>
<div class="sep"></div>
<div class="group">
<button id="btnZoomOut">－</button>
<span class="zoom" id="zoom">100%</span>
<button id="btnZoomIn">＋</button>
<button id="btnReset">1:1</button>
</div>
<div class="sep"></div>
<div class="group">
<button id="btnExport">导出 PNG</button>
</div>
</div>
<div class="canvas-wrap" id="wrap">
<div id="canvas"></div>
<div class="empty" id="empty"><div class="ico">▦</div><div>暂无节点，切换到编辑模式拖入节点</div></div>
<div class="minimap"><canvas id="minimap" width="220" height="150"></canvas></div>
<div class="menu" id="menu"></div>
</div>
</section>
<aside class="panel">
<h4>节点详情</h4>
<div id="detail"><div class="none">点击节点查看详情</div></div>
<div class="rename" id="renameBox" style="display:none">
<input id="renameInput" placeholder="节点 ID" />
<button id="btnRename">保存</button>
</div>
<h4>运行状态图例</h4>
<div class="legend" id="legend"></div>
<h4>运行日志</h4>
<div class="log" id="log"></div>
</aside>
<div class="backdrop" id="backdrop"></div>
<div class="hint" id="hint"></div>
<script type="module">
// 引入官方流程图组件（createFlowGraph 返回 FlowGraphComponent 实例）
import { createFlowGraph, NODE_TYPES, STATUS_META, typeColor } from './js/flow-graph.js';
// ---------- 示例数据 ----------
const STAGES = [
{ id: 'fetch_user', type: 'fetch', config: {}, inputs: [], outputs: ['user'], dependsOn: [] },
{ id: 'fetch_order', type: 'fetch', config: {}, inputs: [], outputs: ['orders'], dependsOn: [] },
{
id: 'normalize', type: 'transform', config: {}, outputs: ['rows'],
inputs: [{ from: 'fetch_user.user' }, { from: 'fetch_order.orders' }],
dependsOn: ['fetch_user', 'fetch_order']
},
{
id: 'score', type: 'script', config: {}, outputs: ['scores'],
inputs: [{ from: 'normalize.rows' }],
dependsOn: ['normalize'], retry: { maxRetries: 2, intervalMs: 1000 }
},
{
id: 'summary', type: 'agent', config: {}, outputs: ['report'],
inputs: [{ from: 'score.scores' }],
dependsOn: ['score']
},
{
id: 'export', type: 'custom', config: {}, inputs: [{ from: 'summary.report' }],
outputs: [], dependsOn: ['summary']
},
{
id: 'notify', type: 'custom', config: {}, inputs: [{ from: 'summary.report' }],
outputs: [], dependsOn: ['summary']
}
];
// ---------- 节点面板 ----------
const palette = document.getElementById('palette');
NODE_TYPES.forEach(t => {
const el = document.createElement('div');
el.className = 'p-item';
el.draggable = true;
el.innerHTML = '<div class="p-icon" style="background:' + typeColor[t.type] + '">' + t.icon +
'</div><div><div class="p-name">' + t.label + '</div><div class="p-desc">' + t.desc + '</div></div>';
el.addEventListener('dragstart', e => {
e.dataTransfer.setData('text/flow-type', t.type);
e.dataTransfer.effectAllowed = 'move';
});
// 移动端：点选面板项 -> 选中待添加类型，再点画布空白处放置
el.addEventListener('click', () => {
if (!isMobile()) return;
if (fg.getMode() !== 'edit') { log('请先切换到编辑模式再添加节点', 'warn'); return; }
pendingAddType = (pendingAddType === t.type) ? null : t.type;
document.querySelectorAll('.p-item').forEach(p => p.classList.remove('active'));
if (pendingAddType) {
el.classList.add('active');
showHint('已选择「' + t.label + '」，点击画布空白处放置节点');
closeDrawers();
} else {
hideHint();
}
});
palette.appendChild(el);
});
// ---------- 图例 ----------
const legend = document.getElementById('legend');
Object.keys(STATUS_META).forEach(k => {
const m = STATUS_META[k];
const s = document.createElement('span');
s.innerHTML = '<i style="background:' + m.color + '"></i>' + m.label;
legend.appendChild(s);
});
// ---------- 日志 ----------
const logBox = document.getElementById('log');
function log(msg, level) {
const d = document.createElement('div');
if (level) d.className = level;
d.textContent = msg;
logBox.appendChild(d);
logBox.scrollTop = logBox.scrollHeight;
while (logBox.childNodes.length > 200) logBox.removeChild(logBox.firstChild);
}
// ---------- 创建流程图 ----------
const wrap = document.getElementById('wrap');
const canvasEl = document.getElementById('canvas');
const menu = document.getElementById('menu');
const detail = document.getElementById('detail');
const renameBox = document.getElementById('renameBox');
const renameInput = document.getElementById('renameInput');
let mode = 'view';
let selected = null;
let uiReady = false; // fg 初始化期间回调会触发渲染，此时 DOM/fg 尚未就绪
let pendingAddType = null; // 移动端：待放置的节点类型（点选面板后点画布添加）
function handleSelect(id) {
selected = id;
renderDetail();
if (isMobile() && id) openDrawer(panelEl);
}
const fg = createFlowGraph(canvasEl, {
stages: STAGES,
mode: 'view',
onSelect: handleSelect,
onEdgeClick: edge => log('点击连线：' + edge.source + ' → ' + edge.target),
onNodeEdit: () => { renameInput.focus(); renameInput.select(); },
onLog: log,
onContextMenu: openContextMenu
});
window.__fg = fg; // temp for debugging
fg.attachMinimap(document.getElementById('minimap'));
uiReady = true;
renderDetail();
// ---------- 工具栏 ----------
const btnMode = document.getElementById('btnMode');
function refreshModeBtn() {
btnMode.textContent = mode === 'edit' ? '👁 查看（编辑中）' : '✏️ 编辑模式';
btnMode.classList.toggle('on', mode === 'edit');
}
btnMode.onclick = () => {
mode = fg.setMode(mode === 'edit' ? 'view' : 'edit');
if (mode !== 'edit') {
pendingAddType = null;
document.querySelectorAll('.p-item').forEach(p => p.classList.remove('active'));
hideHint();
} else if (isMobile()) {
log('移动端提示：点选上方「节点」面板中的类型，再点画布空白处即可添加节点', 'info');
}
refreshModeBtn();
renderDetail();
log(mode === 'edit' ? '已进入编辑模式：可拖动节点、拖拽连接点建边、长按节点操作' : '已切换到查看模式');
};
refreshModeBtn();
document.getElementById('btnRun').onclick = () => {
if (fg.isRunning()) return;
document.getElementById('btnRun').textContent = '⏳ 执行中…';
fg.run().then(() => {
document.getElementById('btnRun').textContent = '▶ 执行流程';
});
};
document.getElementById('btnResetRun').onclick = () => fg.resetRun();
document.getElementById('btnLayout').onclick = () => fg.autoLayout();
document.getElementById('btnFit').onclick = () => fg.fit();
document.getElementById('btnZoomIn').onclick = () => fg.zoomIn();
document.getElementById('btnZoomOut').onclick = () => fg.zoomOut();
document.getElementById('btnReset').onclick = () => fg.resetView();
document.getElementById('btnExport').onclick = () => fg.exportPNG('jmgraph-flow');
// 缩放比例显示
setInterval(() => {
document.getElementById('zoom').textContent = Math.round(fg.getZoom() * 100) + '%';
}, 200);
// ---------- 详情面板 ----------
function renderDetail() {
if (!uiReady) return;
const stage = fg.getStages().find(s => s.id === selected);
if (!stage) {
detail.innerHTML = '<div class="none">点击节点查看详情</div>';
renameBox.style.display = 'none';
return;
}
const meta = STATUS_META[fg.getRunStatus()[stage.id] || 'idle'] || STATUS_META.idle;
const rows = [
['ID', stage.id],
['类型', stage.type],
['状态', meta.label],
['输入', (stage.inputs || []).map(i => i.from || '(value)').join(', ') || '—'],
['输出', (stage.outputs || []).join(', ') || '—'],
['依赖', (stage.dependsOn || []).join(', ') || '—'],
['重试', stage.retry ? stage.retry.maxRetries + ' 次 / ' + stage.retry.intervalMs + 'ms' : '—']
];
detail.innerHTML = rows.map(r =>
'<div class="kv"><b>' + r[0] + '</b><span>' + r[1] + '</span></div>').join('');
renameBox.style.display = mode === 'edit' ? 'flex' : 'none';
renameInput.value = stage.id;
}
document.getElementById('btnRename').onclick = () => {
if (fg.renameStage(selected, renameInput.value)) renderDetail();
};
renameInput.addEventListener('keydown', e => {
if (e.key === 'Enter') document.getElementById('btnRename').click();
});
// ---------- 拖拽新增节点 ----------
wrap.addEventListener('dragover', e => { e.preventDefault(); e.dataTransfer.dropEffect = 'move'; });
wrap.addEventListener('drop', e => {
e.preventDefault();
if (fg.getMode() !== 'edit') { log('请先切换到编辑模式再添加节点', 'warn'); return; }
const type = e.dataTransfer.getData('text/flow-type');
if (!type) return;
const pos = fg.graph.getPosition();
const world = fg.graph.screenToWorld({ x: e.pageX - pos.left, y: e.pageY - pos.top });
fg.addStage(type, world);
});
// ---------- 右键菜单 ----------
function showMenu(x, y, items) {
menu.innerHTML = '';
items.forEach(it => {
const d = document.createElement('div');
d.textContent = it.label;
if (it.danger) d.className = 'danger';
d.onclick = () => { hideMenu(); if (it.action) it.action(); };
menu.appendChild(d);
});
menu.style.display = 'block';
const rect = wrap.getBoundingClientRect();
const mw = menu.offsetWidth, mh = menu.offsetHeight;
menu.style.left = Math.min(x - rect.left, rect.width - mw - 6) + 'px';
menu.style.top = Math.min(y - rect.top, rect.height - mh - 6) + 'px';
}
function hideMenu() { menu.style.display = 'none'; }
document.addEventListener('mousedown', e => { if (!menu.contains(e.target)) hideMenu(); });
// ---------- 右键 / 长按 菜单（基于组件 onContextMenu 事件） ----------
// 桌面端由库的 onContextMenu 事件驱动（已含命中结果与世界坐标）；
// 移动端长按不是原生 contextmenu 事件，需自行换算坐标后复用同一处理函数。
function contextMenuAtClient(clientX, clientY) {
const rect = wrap.getBoundingClientRect();
const world = fg.graph.screenToWorld({ x: clientX - rect.left, y: clientY - rect.top });
const node = fg.nodeAt(world);
if (node) return { type: 'node', id: node.stage.id, stage: node.stage, clientX, clientY, x: world.x, y: world.y };
return { type: 'pane', id: null, stage: null, clientX, clientY, x: world.x, y: world.y };
}
function openContextMenu(info) {
const { clientX, clientY, type } = info;
if (type === 'node') {
fg.select(info.id);
showMenu(clientX, clientY, [
{ label: '✏️ 重命名节点', action: () => { renameInput.focus(); renameInput.select(); } },
{ label: '▶ 从该节点执行', action: () => log('（示例）从 ' + info.id + ' 开始执行') },
{ label: '🗑 删除节点', danger: true, action: () => fg.removeStage(info.id) }
]);
return;
}
// edge / pane：空白区与连线上的操作（info.x/info.y 为世界坐标）
const world = { x: info.x, y: info.y };
const items = [];
if (type === 'edge' && info.edge) {
items.push({ label: '🔗 ' + info.edge.source + ' → ' + info.edge.target });
}
items.push(
{ label: '🔍 适应视图', action: () => fg.fit() },
{ label: '📐 自动布局', action: () => fg.autoLayout() },
{ label: '➕ 添加节点（编辑模式）', action: () => {
if (fg.getMode() !== 'edit') { log('请先切换到编辑模式', 'warn'); return; }
fg.addStage('custom', world);
} }
);
showMenu(clientX, clientY, items);
}
// ---------- 移动端通用工具 ----------
function isMobile() { return window.matchMedia('(max-width: 820px)').matches; }
function showHint(msg) { const h = document.getElementById('hint'); h.textContent = msg; h.classList.add('show'); }
function hideHint() { document.getElementById('hint').classList.remove('show'); }
// ---------- 移动端抽屉（节点面板 / 详情） ----------
const paletteEl = document.querySelector('.palette');
const panelEl = document.querySelector('.panel');
const backdrop = document.getElementById('backdrop');
function openDrawer(el) { closeDrawers(); el.classList.add('open'); backdrop.classList.add('show'); }
function closeDrawers() {
paletteEl.classList.remove('open');
panelEl.classList.remove('open');
backdrop.classList.remove('show');
}
document.getElementById('btnPalette').onclick = () =>
paletteEl.classList.contains('open') ? closeDrawers() : openDrawer(paletteEl);
document.getElementById('btnPanel').onclick = () =>
panelEl.classList.contains('open') ? closeDrawers() : openDrawer(panelEl);
backdrop.onclick = closeDrawers;
// ---------- 移动端：点选面板项后点画布空白处添加节点 ----------
wrap.addEventListener('click', e => {
if (!pendingAddType) return;
const rect = wrap.getBoundingClientRect();
const world = fg.graph.screenToWorld({ x: e.clientX - rect.left, y: e.clientY - rect.top });
if (fg.nodeAt(world)) return; // 点中已有节点则不放置
fg.addStage(pendingAddType, world);
pendingAddType = null;
document.querySelectorAll('.p-item').forEach(p => p.classList.remove('active'));
hideHint();
});
// ---------- 移动端：长按菜单 + 双指缩放 ----------
let lpTimer = null, lpPt = null, lpMoved = false, lpFired = false, pinch = null;
function clearLp() { if (lpTimer) { clearTimeout(lpTimer); lpTimer = null; } lpPt = null; lpMoved = false; lpFired = false; }
wrap.addEventListener('touchstart', e => {
if (e.touches.length === 2) {
clearLp();
const [a, b] = [e.touches[0], e.touches[1]];
pinch = { d: Math.hypot(a.clientX - b.clientX, a.clientY - b.clientY) };
return;
}
if (e.touches.length !== 1) { clearLp(); return; }
lpPt = { x: e.touches[0].clientX, y: e.touches[0].clientY };
lpMoved = false;
lpTimer = setTimeout(() => {
lpTimer = null;
if (!lpMoved) { lpFired = true; openContextMenu(contextMenuAtClient(lpPt.x, lpPt.y)); }
}, 500);
}, { passive: true });
wrap.addEventListener('touchmove', e => {
if (e.touches.length === 2 && pinch) {
e.preventDefault();
const [a, b] = [e.touches[0], e.touches[1]];
const d = Math.hypot(a.clientX - b.clientX, a.clientY - b.clientY);
if (d > 0 && pinch.d > 0) {
const rect = wrap.getBoundingClientRect();
const cx = (a.clientX + b.clientX) / 2, cy = (a.clientY + b.clientY) / 2;
fg.graph.setZoom(fg.graph.scaleFactor * (d / pinch.d), cx - rect.left, cy - rect.top);
}
pinch.d = d;
return;
}
if (lpPt && e.touches[0]) {
const dx = e.touches[0].clientX - lpPt.x, dy = e.touches[0].clientY - lpPt.y;
if (Math.hypot(dx, dy) > 10) { lpMoved = true; clearLp(); }
}
}, { passive: false });
wrap.addEventListener('touchend', e => {
if (e.touches.length < 2) pinch = null;
if (!lpMoved && !lpFired && lpPt && e.changedTouches.length === 1) {
const t = e.changedTouches[0];
const rect = wrap.getBoundingClientRect();
const world = fg.graph.screenToWorld({ x: t.clientX - rect.left, y: t.clientY - rect.top });
const node = fg.nodeAt(world);
if (pendingAddType) {
if (!node) {
fg.addStage(pendingAddType, world);
pendingAddType = null;
document.querySelectorAll('.p-item').forEach(p => p.classList.remove('active'));
hideHint();
}
} else if (node) {
fg.select(node.stage.id);
} else {
fg.select(null);
}
}
clearLp();
}, { passive: true });
// 触控点击空白处关闭菜单
document.addEventListener('touchstart', e => { if (!menu.contains(e.target)) hideMenu(); }, true);
// ---------- 删除键 ----------
document.addEventListener('keydown', e => {
if (e.key !== 'Delete' && e.key !== 'Backspace') return;
if (e.target && /INPUT|TEXTAREA/.test(e.target.tagName)) return;
if (fg.getMode() !== 'edit' || !selected) return;
fg.removeStage(selected);
});
// ---------- 尺寸自适应 ----------
window.addEventListener('resize', () => fg.resize());
setTimeout(() => fg.resize(), 0);
log('jmGraph 流程图示例已就绪');
log('提示：滚轮缩放 / 空白处拖拽平移 / 点击节点查看详情', 'info');
</script>
</body>
</html>