tree-selector.html
· 46 KiB · HTML
原始檔案
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>移动端树形多选列表</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
background-color: #f5f5f5;
padding: 10px;
}
.container {
max-width: 100%;
margin: 0 auto;
}
.search-box {
position: sticky;
top: 0;
background: white;
padding: 10px;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
z-index: 100;
border-radius: 8px;
margin-bottom: 10px;
}
.search-input {
width: 100%;
padding: 12px 15px;
border: 1px solid #ddd;
border-radius: 20px;
font-size: 16px;
outline: none;
transition: all 0.3s;
}
.search-input:focus {
border-color: #007AFF;
box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.2);
}
.result-info {
padding: 10px;
color: #666;
font-size: 14px;
}
.tree-container {
background: white;
border-radius: 8px;
overflow: hidden;
box-shadow: 0 1px 3px rgba(0,0,0,0.1);
height: calc(100vh - 150px);
overflow-y: auto;
position: relative;
}
.tree-node {
display: flex;
align-items: center;
padding: 12px 15px;
border-bottom: 1px solid #eee;
transition: background-color 0.2s;
position: absolute;
width: 100%;
box-sizing: border-box;
}
.tree-node:last-child {
border-bottom: none;
}
.tree-node.indent-1 { padding-left: 30px; }
.tree-node.indent-2 { padding-left: 45px; }
.tree-node.indent-3 { padding-left: 60px; }
.tree-node.indent-4 { padding-left: 75px; }
.tree-node.indent-5 { padding-left: 90px; }
.tree-node.indent-6 { padding-left: 105px; }
.tree-node.indent-7 { padding-left: 120px; }
.tree-node.indent-8 { padding-left: 135px; }
.tree-node.indent-9 { padding-left: 150px; }
.tree-node.indent-10 { padding-left: 165px; }
.node-toggle {
width: 24px;
height: 24px;
display: flex;
align-items: center;
justify-content: center;
margin-right: 8px;
color: #999;
font-size: 18px;
transform: rotate(0deg);
transition: transform 0.2s;
}
.node-toggle.expanded {
transform: rotate(90deg);
}
.node-toggle.empty {
visibility: hidden;
}
.node-content {
flex: 1;
font-size: 16px;
color: #333;
}
.node-checkbox {
width: 20px;
height: 20px;
border: 2px solid #ccc;
border-radius: 4px;
display: flex;
align-items: center;
justify-content: center;
margin-left: 10px;
position: relative;
}
.node-checkbox.checked {
background-color: #007AFF;
border-color: #007AFF;
}
.node-checkbox.indeterminate::after {
content: "";
position: absolute;
width: 10px;
height: 2px;
background-color: white;
}
.node-checkbox.checked::after {
content: "✓";
color: white;
font-size: 14px;
position: absolute;
}
.node-children {
overflow: hidden;
transition: max-height 0.3s ease-out;
}
.search-result {
background-color: #e8f4ff;
}
.no-results {
padding: 20px;
text-align: center;
color: #999;
}
.loading {
padding: 20px;
text-align: center;
color: #999;
}
.selected-count {
position: fixed;
bottom: 20px;
right: 20px;
background: #007AFF;
color: white;
width: 50px;
height: 50px;
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
font-weight: bold;
box-shadow: 0 2px 10px rgba(0,0,0,0.3);
cursor: pointer;
z-index: 1000;
}
.breadcrumb {
display: flex;
padding: 10px 15px;
background: #f9f9f9;
border-bottom: 1px solid #eee;
overflow-x: auto;
white-space: nowrap;
}
.breadcrumb-item {
font-size: 14px;
color: #007AFF;
cursor: pointer;
padding: 0 5px;
}
.breadcrumb-item:not(:last-child)::after {
content: " > ";
color: #999;
}
.breadcrumb-item:last-child {
color: #333;
font-weight: bold;
}
.node-path {
color: #888;
font-size: 12px;
margin-top: 3px;
}
.search-mode .tree-node:not(.search-result) .node-path {
display: none;
}
.virtual-container {
position: relative;
}
.node-icon {
margin-right: 8px;
font-size: 16px;
}
.folder-icon::before {
content: "📁";
}
.file-icon::before {
content: "📄";
}
/* 弹窗样式 */
.modal {
display: none;
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: rgba(0, 0, 0, 0.5);
z-index: 2000;
justify-content: center;
align-items: center;
}
.modal-content {
background-color: white;
border-radius: 10px;
width: 90%;
max-width: 500px;
max-height: 80vh;
overflow: hidden;
display: flex;
flex-direction: column;
}
.modal-header {
padding: 15px 20px;
border-bottom: 1px solid #eee;
display: flex;
justify-content: space-between;
align-items: center;
}
.modal-title {
font-size: 18px;
font-weight: bold;
color: #333;
}
.modal-close {
background: none;
border: none;
font-size: 24px;
cursor: pointer;
color: #999;
}
.modal-body {
padding: 10px 20px;
overflow-y: auto;
flex: 1;
}
.selected-item {
display: flex;
justify-content: space-between;
align-items: center;
padding: 12px 0;
border-bottom: 1px solid #f0f0f0;
}
.selected-item:last-child {
border-bottom: none;
}
.item-info {
flex: 1;
}
.item-name {
font-size: 16px;
color: #333;
}
.item-path {
font-size: 12px;
color: #888;
margin-top: 3px;
}
.deselect-btn {
background: #ff3b30;
color: white;
border: none;
border-radius: 4px;
padding: 6px 12px;
font-size: 14px;
cursor: pointer;
}
.modal-footer {
padding: 15px 20px;
border-top: 1px solid #eee;
display: flex;
justify-content: space-between;
}
.clear-all-btn {
background: #ff3b30;
color: white;
border: none;
border-radius: 4px;
padding: 10px 20px;
font-size: 16px;
cursor: pointer;
}
.confirm-btn {
background: #007AFF;
color: white;
border: none;
border-radius: 4px;
padding: 10px 20px;
font-size: 16px;
cursor: pointer;
}
.empty-selected {
text-align: center;
padding: 30px;
color: #999;
}
/* 父节点样式调整 */
.parent-node .node-content {
flex: 1;
}
.parent-node .node-checkbox {
display: none;
}
</style>
</head>
<body>
<div class="container">
<div class="search-box">
<input type="text" class="search-input" id="searchInput" placeholder="输入名称搜索...">
</div>
<div class="breadcrumb" id="breadcrumb"></div>
<div class="result-info" id="resultInfo"></div>
<div class="tree-container" id="treeContainer">
<div class="loading" id="loading">加载中...</div>
</div>
</div>
<div class="selected-count" id="selectedCount">0</div>
<!-- 已选项弹窗 -->
<div class="modal" id="selectedModal">
<div class="modal-content">
<div class="modal-header">
<div class="modal-title">已选项</div>
<button class="modal-close" id="modalClose">×</button>
</div>
<div class="modal-body" id="modalBody">
<!-- 已选项将在这里显示 -->
</div>
<div class="modal-footer">
<button class="clear-all-btn" id="clearAllBtn">清空所有</button>
<button class="confirm-btn" id="confirmBtn">确认</button>
</div>
</div>
</div>
<script>
// 模拟大量树形数据
class TreeNode {
constructor(id, name, parentId = null) {
this.id = id;
this.name = name;
this.parentId = parentId;
this.children = [];
this.checked = false;
this.indeterminate = false;
}
}
// 生成大量测试数据，最多5-6级深度
function generateTreeData() {
console.time('数据生成耗时');
const rootNode = new TreeNode('0', '根节点');
const nodeMap = new Map();
nodeMap.set('0', rootNode);
// 生成5-6级深度的树结构
// 第1级: 10个节点
for (let i = 1; i <= 10; i++) {
const parentId = '0';
const nodeId = i.toString();
const nodeName = `一级节点 ${i}`;
const node = new TreeNode(nodeId, nodeName, parentId);
nodeMap.set(nodeId, node);
nodeMap.get(parentId).children.push(node);
}
// 第2级: 每个一级节点下有20个二级节点
for (let i = 1; i <= 10; i++) {
for (let j = 1; j <= 20; j++) {
const parentId = i.toString();
const nodeId = `${i}-${j}`;
const nodeName = `二级节点 ${i}-${j}`;
const node = new TreeNode(nodeId, nodeName, parentId);
nodeMap.set(nodeId, node);
nodeMap.get(parentId).children.push(node);
}
}
// 第3级: 每个二级节点下有15个三级节点
for (let i = 1; i <= 10; i++) {
for (let j = 1; j <= 20; j++) {
for (let k = 1; k <= 15; k++) {
const parentId = `${i}-${j}`;
const nodeId = `${i}-${j}-${k}`;
const nodeName = `三级节点 ${i}-${j}-${k}`;
const node = new TreeNode(nodeId, nodeName, parentId);
nodeMap.set(nodeId, node);
nodeMap.get(parentId).children.push(node);
}
}
}
// 第4级: 每个三级节点下有10个四级节点
for (let i = 1; i <= 10; i++) {
for (let j = 1; j <= 20; j++) {
for (let k = 1; k <= 15; k++) {
for (let l = 1; l <= 10; l++) {
const parentId = `${i}-${j}-${k}`;
const nodeId = `${i}-${j}-${k}-${l}`;
const nodeName = `四级节点 ${i}-${j}-${k}-${l}`;
const node = new TreeNode(nodeId, nodeName, parentId);
nodeMap.set(nodeId, node);
nodeMap.get(parentId).children.push(node);
}
}
}
}
// 第5级: 每个四级节点下有5个五级节点
for (let i = 1; i <= 10; i++) {
for (let j = 1; j <= 20; j++) {
for (let k = 1; k <= 15; k++) {
for (let l = 1; l <= 10; l++) {
for (let m = 1; m <= 5; m++) {
const parentId = `${i}-${j}-${k}-${l}`;
const nodeId = `${i}-${j}-${k}-${l}-${m}`;
const nodeName = `五级节点 ${i}-${j}-${k}-${l}-${m}`;
const node = new TreeNode(nodeId, nodeName, parentId);
nodeMap.set(nodeId, node);
nodeMap.get(parentId).children.push(node);
}
}
}
}
}
// 第6级: 部分五级节点下有六级节点
for (let i = 1; i <= 10; i++) {
for (let j = 1; j <= 20; j++) {
for (let k = 1; k <= 15; k++) {
for (let l = 1; l <= 10; l++) {
for (let m = 1; m <= 5; m++) {
// 只为部分节点添加六级节点
if (Math.random() > 0.7) {
for (let n = 1; n <= 3; n++) {
const parentId = `${i}-${j}-${k}-${l}-${m}`;
const nodeId = `${i}-${j}-${k}-${l}-${m}-${n}`;
const nodeName = `六级节点 ${i}-${j}-${k}-${l}-${m}-${n}`;
const node = new TreeNode(nodeId, nodeName, parentId);
nodeMap.set(nodeId, node);
nodeMap.get(parentId).children.push(node);
}
}
}
}
}
}
}
console.timeEnd('数据生成耗时');
console.log(rootNode);
return rootNode;
}
// 树形列表组件
class TreeSelector {
constructor(container, rootNode) {
this.container = container;
this.rootNode = rootNode;
this.currentNode = rootNode;
this.path = [rootNode];
this.selectedNodes = new Set();
this.searchResults = new Set();
this.searchMode = false;
this.searchTerm = '';
// 虚拟滚动相关
this.nodeHeight = 50; // 每个节点的高度
this.buffer = 15; // 缓冲区节点数
this.scrollTop = 0;
this.containerHeight = 0;
// 创建节点ID到节点的映射以提高查找性能
this.nodeMap = new Map();
this.buildNodeMap(rootNode);
console.log('节点ID到节点数量',this.nodeMap.size)
// 构建父节点映射以提高查找性能
this.parentMap = new Map();
this.buildParentMap(rootNode);
// 构建节点路径映射
this.nodePathMap = new Map();
this.buildNodePathMap(rootNode, []);
// 初始化虚拟滚动
this.initVirtualScroll();
this.render();
this.bindEvents();
this.updateSelectedCount();
this.initModal();
}
// 构建节点路径映射
buildNodePathMap(node, path) {
const currentPath = [...path, node.name];
this.nodePathMap.set(node.id, currentPath);
if (node.children) {
node.children.forEach(child => {
this.buildNodePathMap(child, currentPath);
});
}
}
// 初始化弹窗
initModal() {
const modal = document.getElementById('selectedModal');
const selectedCount = document.getElementById('selectedCount');
const modalClose = document.getElementById('modalClose');
const clearAllBtn = document.getElementById('clearAllBtn');
const confirmBtn = document.getElementById('confirmBtn');
// 点击已选数量按钮打开弹窗
selectedCount.addEventListener('click', () => {
this.showSelectedModal();
});
// 点击关闭按钮关闭弹窗
modalClose.addEventListener('click', () => {
this.closeSelectedModal();
});
// 点击清空所有按钮
clearAllBtn.addEventListener('click', () => {
this.clearAllSelections();
});
// 点击确认按钮
confirmBtn.addEventListener('click', () => {
this.confirmSelections();
});
// 点击遮罩层关闭弹窗
modal.addEventListener('click', (e) => {
if (e.target === modal) {
this.closeSelectedModal();
}
});
}
// 显示已选项弹窗
showSelectedModal() {
const modal = document.getElementById('selectedModal');
const modalBody = document.getElementById('modalBody');
// 获取所有选中的节点
const selectedNodes = [];
for (const [id, node] of this.nodeMap) {
if (node.checked) {
selectedNodes.push(node);
}
}
// 清空弹窗内容
modalBody.innerHTML = '';
// 显示选中项
if (selectedNodes.length === 0) {
modalBody.innerHTML = '<div class="empty-selected">暂无选中项</div>';
} else {
selectedNodes.forEach(node => {
const itemElement = document.createElement('div');
itemElement.className = 'selected-item';
const itemInfo = document.createElement('div');
itemInfo.className = 'item-info';
const itemName = document.createElement('div');
itemName.className = 'item-name';
itemName.textContent = node.name;
const itemPath = document.createElement('div');
itemPath.className = 'item-path';
itemPath.textContent = this.nodePathMap.get(node.id).join(' > ');
itemInfo.appendChild(itemName);
itemInfo.appendChild(itemPath);
const deselectBtn = document.createElement('button');
deselectBtn.className = 'deselect-btn';
deselectBtn.textContent = '取消';
deselectBtn.addEventListener('click', () => {
this.deselectNode(node);
});
itemElement.appendChild(itemInfo);
itemElement.appendChild(deselectBtn);
modalBody.appendChild(itemElement);
});
}
// 显示弹窗
modal.style.display = 'flex';
}
// 关闭已选项弹窗
closeSelectedModal() {
const modal = document.getElementById('selectedModal');
modal.style.display = 'none';
}
// 取消选中节点
deselectNode(node) {
node.checked = false;
node.indeterminate = false;
// 更新子节点状态
this.updateChildren(node, false);
// 更新父节点状态
this.updateParents(node);
// 更新选中计数
this.updateSelectedCount();
// 更新UI
this.updateCheckboxUI(node);
// 重新渲染弹窗
this.showSelectedModal();
}
// 清空所有选择
clearAllSelections() {
for (const [id, node] of this.nodeMap) {
if (node.checked) {
node.checked = false;
node.indeterminate = false;
this.updateCheckboxUI(node);
}
}
// 更新选中计数
this.updateSelectedCount();
// 重新渲染弹窗
this.showSelectedModal();
}
// 确认选择并打印到控制台
confirmSelections() {
const selectedNodes = [];
for (const [id, node] of this.nodeMap) {
if (node.checked) {
selectedNodes.push({
id: node.id,
name: node.name,
path: this.nodePathMap.get(node.id).join(' > ')
});
}
}
console.log('已选项:', selectedNodes);
alert(`已选择 ${selectedNodes.length} 项，详情请查看控制台`);
// 关闭弹窗
this.closeSelectedModal();
}
// 初始化虚拟滚动
initVirtualScroll() {
let ticking = false;
const handleScroll = () => {
this.scrollTop = this.container.scrollTop;
if (!ticking) {
requestAnimationFrame(() => {
this.render();
ticking = false;
});
ticking = true;
}
};
this.container.addEventListener('scroll', handleScroll);
// 获取容器高度
this.containerHeight = this.container.clientHeight;
}
// 构建节点ID到节点的映射
buildNodeMap(node) {
this.nodeMap.set(node.id, node);
if (node.children) {
node.children.forEach(child => this.buildNodeMap(child));
}
}
// 构建父节点映射
buildParentMap(node) {
if (node.children) {
node.children.forEach(child => {
this.parentMap.set(child.id, node);
this.buildParentMap(child);
});
}
}
// 渲染树形结构
render() {
if (this.searchMode) {
this.renderSearchResults();
} else {
this.renderTree();
}
this.renderBreadcrumb();
this.updateResultInfo();
}
// 渲染普通树结构（虚拟滚动）
renderTree() {
// 获取当前路径下的所有节点
const allNodes = this.flattenTree(this.currentNode, 0);
// 计算可见节点范围
const startIndex = Math.max(0, Math.floor(this.scrollTop / this.nodeHeight) - this.buffer);
const endIndex = Math.min(
allNodes.length,
Math.ceil((this.scrollTop + this.containerHeight) / this.nodeHeight) + this.buffer
);
// 获取可见节点
const visibleNodes = allNodes.slice(startIndex, endIndex);
// 创建或获取虚拟容器
let virtualContainer = this.container.querySelector('.virtual-container');
if (!virtualContainer) {
virtualContainer = document.createElement('div');
virtualContainer.className = 'virtual-container';
this.container.innerHTML = '';
this.container.appendChild(virtualContainer);
}
// 设置虚拟容器高度
virtualContainer.style.height = `${allNodes.length * this.nodeHeight}px`;
// 获取所有现有的节点元素
const existingNodes = Array.from(virtualContainer.querySelectorAll('.tree-node'));
// 创建一个映射来跟踪哪些节点已经存在
const existingNodeMap = new Map();
existingNodes.forEach(nodeEl => {
existingNodeMap.set(nodeEl.dataset.id, nodeEl);
});
// 移除不再需要的节点
const visibleNodeIds = new Set(visibleNodes.map(item => item.node.id));
existingNodes.forEach(nodeEl => {
if (!visibleNodeIds.has(nodeEl.dataset.id)) {
nodeEl.remove();
}
});
// 更新或创建可见节点
visibleNodes.forEach((item, index) => {
const nodeId = item.node.id;
let nodeElement = existingNodeMap.get(nodeId);
if (!nodeElement) {
// 创建新节点
nodeElement = this.createNodeElement(item.node, item.depth);
virtualContainer.appendChild(nodeElement);
}
// 更新节点位置
nodeElement.style.top = `${(index + startIndex) * this.nodeHeight}px`;
});
}
// 展平树结构
flattenTree(node, depth) {
const result = [{ node, depth }];
if (node.expanded && node.children && node.children.length > 0) {
node.children.forEach(child => {
result.push(...this.flattenTree(child, depth + 1));
});
}
return result;
}
// 创建节点元素
createNodeElement(node, depth) {
// 判断是否为父节点（有子节点）
const isParent = node.children && node.children.length > 0;
const nodeElement = document.createElement('div');
nodeElement.className = `tree-node ${isParent ? 'parent-node' : ''} indent-${Math.min(depth, 10)}`;
nodeElement.dataset.id = node.id;
// 展开/收起按钮
const toggleElement = document.createElement('div');
toggleElement.className = `node-toggle ${!isParent ? 'empty' : ''} ${node.expanded ? 'expanded' : ''}`;
toggleElement.innerHTML = '▶';
nodeElement.appendChild(toggleElement);
// 节点内容
const contentElement = document.createElement('div');
contentElement.className = 'node-content';
contentElement.textContent = node.name;
nodeElement.appendChild(contentElement);
// 只为叶节点添加复选框
if (!isParent) {
const checkboxElement = document.createElement('div');
checkboxElement.className = `node-checkbox ${node.checked ? 'checked' : ''} ${node.indeterminate && !node.checked ? 'indeterminate' : ''}`;
nodeElement.appendChild(checkboxElement);
}
return nodeElement;
}
// 渲染搜索结果（扁平列表，带虚拟滚动）
renderSearchResults() {
if (this.searchResults.size === 0) {
const noResultsElement = document.createElement('div');
noResultsElement.className = 'no-results';
noResultsElement.textContent = '未找到匹配结果';
this.container.innerHTML = '';
this.container.appendChild(noResultsElement);
return;
}
// 将搜索结果转换为数组并排序
const resultsArray = Array.from(this.searchResults).sort((a, b) => {
return a.name.localeCompare(b.name);
});
// 计算可见节点范围
const startIndex = Math.max(0, Math.floor(this.scrollTop / this.nodeHeight) - this.buffer);
const endIndex = Math.min(
resultsArray.length,
Math.ceil((this.scrollTop + this.containerHeight) / this.nodeHeight) + this.buffer
);
// 获取可见节点
const visibleResults = resultsArray.slice(startIndex, endIndex);
// 创建或获取虚拟容器
let virtualContainer = this.container.querySelector('.virtual-container');
if (!virtualContainer) {
virtualContainer = document.createElement('div');
virtualContainer.className = 'virtual-container';
this.container.innerHTML = '';
this.container.appendChild(virtualContainer);
}
// 设置虚拟容器高度
virtualContainer.style.height = `${resultsArray.length * this.nodeHeight}px`;
// 获取所有现有的节点元素
const existingNodes = Array.from(virtualContainer.querySelectorAll('.tree-node'));
// 创建一个映射来跟踪哪些节点已经存在
const existingNodeMap = new Map();
existingNodes.forEach(nodeEl => {
existingNodeMap.set(nodeEl.dataset.id, nodeEl);
});
// 移除不再需要的节点
const visibleNodeIds = new Set(visibleResults.map(node => node.id));
existingNodes.forEach(nodeEl => {
if (!visibleNodeIds.has(nodeEl.dataset.id)) {
nodeEl.remove();
}
});
// 更新或创建可见节点
visibleResults.forEach((node, index) => {
let nodeElement = existingNodeMap.get(node.id);
if (!nodeElement) {
// 创建新节点
nodeElement = this.createSearchResultElement(node);
virtualContainer.appendChild(nodeElement);
}
// 更新节点位置
nodeElement.style.top = `${(index + startIndex) * this.nodeHeight}px`;
});
}
// 创建搜索结果元素
createSearchResultElement(node) {
// 判断是否为父节点（有子节点）
const isParent = node.children && node.children.length > 0;
const nodeElement = document.createElement('div');
nodeElement.className = `tree-node search-result ${isParent ? 'parent-node' : ''}`;
nodeElement.dataset.id = node.id;
// 节点图标（文件夹或文件）
const iconElement = document.createElement('div');
iconElement.className = `node-icon ${isParent ? 'folder-icon' : 'file-icon'}`;
nodeElement.appendChild(iconElement);
// 节点内容
const contentElement = document.createElement('div');
contentElement.className = 'node-content';
contentElement.textContent = node.name;
nodeElement.appendChild(contentElement);
// 只为叶节点添加复选框
if (!isParent) {
const checkboxElement = document.createElement('div');
checkboxElement.className = `node-checkbox ${node.checked ? 'checked' : ''} ${node.indeterminate && !node.checked ? 'indeterminate' : ''}`;
nodeElement.appendChild(checkboxElement);
}
return nodeElement;
}
// 渲染面包屑导航
renderBreadcrumb() {
const breadcrumb = document.getElementById('breadcrumb');
if (!breadcrumb) return;
breadcrumb.innerHTML = '';
this.path.forEach((node, index) => {
const item = document.createElement('div');
item.className = 'breadcrumb-item';
item.textContent = node.name;
item.onclick = () => this.navigateTo(index);
breadcrumb.appendChild(item);
});
}
// 更新结果信息
updateResultInfo() {
const info = document.getElementById('resultInfo');
if (!info) return;
if (this.searchMode) {
info.textContent = `找到 ${this.searchResults.size} 个匹配结果`;
} else {
info.textContent = '';
}
}
// 绑定事件
bindEvents() {
// 搜索事件
const searchInput = document.getElementById('searchInput');
if (!searchInput) return;
let searchTimeout;
searchInput.addEventListener('input', (e) => {
clearTimeout(searchTimeout);
searchTimeout = setTimeout(() => {
this.search(e.target.value);
}, 300);
});
// 节点点击事件代理
this.container.addEventListener('click', (e) => {
const nodeElement = e.target.closest('.tree-node');
if (!nodeElement) return;
const nodeId = nodeElement.dataset.id;
const node = this.nodeMap.get(nodeId);
if (!node) return;
// 在搜索模式下，点击节点行为不同
if (this.searchMode) {
// 点击复选框
if (e.target.classList.contains('node-checkbox')) {
this.toggleCheckbox(node);
return;
}
// 点击节点内容 - 进入浏览模式并导航到该节点
this.enterNodeFromSearch(node);
return;
}
// 在浏览模式下保持原有行为
// 点击展开/收起按钮
if (e.target.classList.contains('node-toggle')) {
this.toggleNode(node);
return;
}
// 点击复选框
if (e.target.classList.contains('node-checkbox')) {
this.toggleCheckbox(node);
return;
}
// 点击节点内容（如果是父节点）
if (e.target.classList.contains('node-content') || e.target.closest('.node-content')) {
if (node.children && node.children.length > 0) {
this.enterNode(node);
} else {
// 点击叶节点时切换选中状态
this.toggleCheckbox(node);
}
return;
}
});
}
// 从搜索结果进入节点浏览
enterNodeFromSearch(node) {
// 构建从根节点到目标节点的路径
const path = [];
let current = node;
// 向上遍历到根节点
while (current) {
path.unshift(current);
current = this.parentMap.get(current.id);
}
// 设置路径并切换到浏览模式
this.path = path;
this.currentNode = node;
this.searchMode = false;
this.searchTerm = '';
const searchInput = document.getElementById('searchInput');
if (searchInput) {
searchInput.value = '';
}
// 展开目标节点
node.expanded = true;
this.scrollTop = 0;
this.container.scrollTop = 0;
this.render();
}
// 搜索功能 - 优化版本
search(term) {
console.time('搜索耗时');
this.searchTerm = term.trim().toLowerCase();
this.searchMode = this.searchTerm !== '';
if (!this.searchMode) {
this.searchResults.clear();
this.scrollTop = 0;
this.container.scrollTop = 0;
this.render();
console.timeEnd('搜索耗时');
return;
}
this.searchResults.clear();
// 使用优化的搜索算法
// 遍历所有节点查找匹配项
for (const [id, node] of this.nodeMap) {
// 检查节点名称是否匹配
if (node.name.toLowerCase().includes(this.searchTerm)) {
this.searchResults.add(node);
}
}
this.scrollTop = 0;
this.container.scrollTop = 0;
console.timeEnd('搜索耗时');
this.render();
}
// 展开/收起节点
toggleNode(node) {
node.expanded = !node.expanded;
this.render();
}
// 进入节点（用于浏览模式）
enterNode(node) {
// 检查节点是否已经在路径中，避免重复添加
const nodeIndex = this.path.findIndex(n => n.id === node.id);
if (nodeIndex !== -1) {
// 如果节点已存在，截断路径到该节点位置
this.path = this.path.slice(0, nodeIndex + 1);
} else {
// 否则添加到路径末尾
this.path.push(node);
}
this.currentNode = node;
this.scrollTop = 0;
this.container.scrollTop = 0;
this.render();
}
// 导航到指定路径层级
navigateTo(index) {
this.path = this.path.slice(0, index + 1);
this.currentNode = this.path[this.path.length - 1];
this.scrollTop = 0;
this.container.scrollTop = 0;
this.render();
}
// 切换复选框状态
toggleCheckbox(node) {
node.checked = !node.checked;
node.indeterminate = false;
// 更新子节点状态
this.updateChildren(node, node.checked);
// 更新父节点状态
this.updateParents(node);
// 更新选中计数
this.updateSelectedCount();
// 更新UI
this.updateCheckboxUI(node);
}
// 更新子节点状态
updateChildren(node, checked) {
if (node.children) {
node.children.forEach(child => {
child.checked = checked;
child.indeterminate = false;
this.updateChildren(child, checked);
});
}
}
// 更新父节点状态
updateParents(node) {
const parent = this.parentMap.get(node.id);
if (!parent) return;
// 检查是否所有子节点都被选中
const allChecked = parent.children.every(child => child.checked);
const someChecked = parent.children.some(child => child.checked || child.indeterminate);
parent.checked = allChecked;
parent.indeterminate = !allChecked && someChecked;
// 更新UI
this.updateCheckboxUI(parent);
// 递归更新祖先节点
this.updateParents(parent);
}
// 更新复选框UI状态
updateCheckboxUI(node) {
// 更新所有匹配的节点元素（可能在不同视图中存在）
const nodeElements = this.container.querySelectorAll(`.tree-node[data-id="${node.id}"]`);
nodeElements.forEach(nodeElement => {
// 只为叶节点更新复选框
if (!nodeElement.classList.contains('parent-node')) {
const checkbox = nodeElement.querySelector('.node-checkbox');
if (checkbox) {
checkbox.className = `node-checkbox ${node.checked ? 'checked' : ''} ${node.indeterminate && !node.checked ? 'indeterminate' : ''}`;
}
}
});
}
// 更新选中计数
updateSelectedCount() {
const count = document.getElementById('selectedCount');
if (!count) return;
const selectedCount = this.getSelectedCount();
count.textContent = selectedCount;
}
// 获取选中节点数量
getSelectedCount() {
let count = 0;
// 使用Map遍历提高性能
for (const [id, node] of this.nodeMap) {
if (node.checked) {
count++;
}
}
return count;
}
}
// 初始化应用
document.addEventListener('DOMContentLoaded', () => {
const treeContainer = document.getElementById('treeContainer');
const loadingElement = document.getElementById('loading');
// 模拟数据加载
setTimeout(() => {
if (loadingElement) {
loadingElement.style.display = 'none';
}
const rootNode = generateTreeData();
const treeSelector = new TreeSelector(treeContainer, rootNode);
// 保存引用以便调试
window.treeSelector = treeSelector;
}, 500);
});
</script>
</body>
</html>
| 1 | <!DOCTYPE html> |
| 2 | <html lang="zh-CN"> |
| 3 | <head> |
| 4 | <meta charset="UTF-8"> |
| 5 | <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"> |
| 6 | <title>移动端树形多选列表</title> |
| 7 | <style> |
| 8 | * { |
| 9 | margin: 0; |
| 10 | padding: 0; |
| 11 | box-sizing: border-box; |
| 12 | } |
| 13 | |
| 14 | body { |
| 15 | font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; |
| 16 | background-color: #f5f5f5; |
| 17 | padding: 10px; |
| 18 | } |
| 19 | |
| 20 | .container { |
| 21 | max-width: 100%; |
| 22 | margin: 0 auto; |
| 23 | } |
| 24 | |
| 25 | .search-box { |
| 26 | position: sticky; |
| 27 | top: 0; |
| 28 | background: white; |
| 29 | padding: 10px; |
| 30 | box-shadow: 0 2px 4px rgba(0,0,0,0.1); |
| 31 | z-index: 100; |
| 32 | border-radius: 8px; |
| 33 | margin-bottom: 10px; |
| 34 | } |
| 35 | |
| 36 | .search-input { |
| 37 | width: 100%; |
| 38 | padding: 12px 15px; |
| 39 | border: 1px solid #ddd; |
| 40 | border-radius: 20px; |
| 41 | font-size: 16px; |
| 42 | outline: none; |
| 43 | transition: all 0.3s; |
| 44 | } |
| 45 | |
| 46 | .search-input:focus { |
| 47 | border-color: #007AFF; |
| 48 | box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.2); |
| 49 | } |
| 50 | |
| 51 | .result-info { |
| 52 | padding: 10px; |
| 53 | color: #666; |
| 54 | font-size: 14px; |
| 55 | } |
| 56 | |
| 57 | .tree-container { |
| 58 | background: white; |
| 59 | border-radius: 8px; |
| 60 | overflow: hidden; |
| 61 | box-shadow: 0 1px 3px rgba(0,0,0,0.1); |
| 62 | height: calc(100vh - 150px); |
| 63 | overflow-y: auto; |
| 64 | position: relative; |
| 65 | } |
| 66 | |
| 67 | .tree-node { |
| 68 | display: flex; |
| 69 | align-items: center; |
| 70 | padding: 12px 15px; |
| 71 | border-bottom: 1px solid #eee; |
| 72 | transition: background-color 0.2s; |
| 73 | position: absolute; |
| 74 | width: 100%; |
| 75 | box-sizing: border-box; |
| 76 | } |
| 77 | |
| 78 | .tree-node:last-child { |
| 79 | border-bottom: none; |
| 80 | } |
| 81 | |
| 82 | .tree-node.indent-1 { padding-left: 30px; } |
| 83 | .tree-node.indent-2 { padding-left: 45px; } |
| 84 | .tree-node.indent-3 { padding-left: 60px; } |
| 85 | .tree-node.indent-4 { padding-left: 75px; } |
| 86 | .tree-node.indent-5 { padding-left: 90px; } |
| 87 | .tree-node.indent-6 { padding-left: 105px; } |
| 88 | .tree-node.indent-7 { padding-left: 120px; } |
| 89 | .tree-node.indent-8 { padding-left: 135px; } |
| 90 | .tree-node.indent-9 { padding-left: 150px; } |
| 91 | .tree-node.indent-10 { padding-left: 165px; } |
| 92 | |
| 93 | .node-toggle { |
| 94 | width: 24px; |
| 95 | height: 24px; |
| 96 | display: flex; |
| 97 | align-items: center; |
| 98 | justify-content: center; |
| 99 | margin-right: 8px; |
| 100 | color: #999; |
| 101 | font-size: 18px; |
| 102 | transform: rotate(0deg); |
| 103 | transition: transform 0.2s; |
| 104 | } |
| 105 | |
| 106 | .node-toggle.expanded { |
| 107 | transform: rotate(90deg); |
| 108 | } |
| 109 | |
| 110 | .node-toggle.empty { |
| 111 | visibility: hidden; |
| 112 | } |
| 113 | |
| 114 | .node-content { |
| 115 | flex: 1; |
| 116 | font-size: 16px; |
| 117 | color: #333; |
| 118 | } |
| 119 | |
| 120 | .node-checkbox { |
| 121 | width: 20px; |
| 122 | height: 20px; |
| 123 | border: 2px solid #ccc; |
| 124 | border-radius: 4px; |
| 125 | display: flex; |
| 126 | align-items: center; |
| 127 | justify-content: center; |
| 128 | margin-left: 10px; |
| 129 | position: relative; |
| 130 | } |
| 131 | |
| 132 | .node-checkbox.checked { |
| 133 | background-color: #007AFF; |
| 134 | border-color: #007AFF; |
| 135 | } |
| 136 | |
| 137 | .node-checkbox.indeterminate::after { |
| 138 | content: ""; |
| 139 | position: absolute; |
| 140 | width: 10px; |
| 141 | height: 2px; |
| 142 | background-color: white; |
| 143 | } |
| 144 | |
| 145 | .node-checkbox.checked::after { |
| 146 | content: "✓"; |
| 147 | color: white; |
| 148 | font-size: 14px; |
| 149 | position: absolute; |
| 150 | } |
| 151 | |
| 152 | .node-children { |
| 153 | overflow: hidden; |
| 154 | transition: max-height 0.3s ease-out; |
| 155 | } |
| 156 | |
| 157 | .search-result { |
| 158 | background-color: #e8f4ff; |
| 159 | } |
| 160 | |
| 161 | .no-results { |
| 162 | padding: 20px; |
| 163 | text-align: center; |
| 164 | color: #999; |
| 165 | } |
| 166 | |
| 167 | .loading { |
| 168 | padding: 20px; |
| 169 | text-align: center; |
| 170 | color: #999; |
| 171 | } |
| 172 | |
| 173 | .selected-count { |
| 174 | position: fixed; |
| 175 | bottom: 20px; |
| 176 | right: 20px; |
| 177 | background: #007AFF; |
| 178 | color: white; |
| 179 | width: 50px; |
| 180 | height: 50px; |
| 181 | border-radius: 50%; |
| 182 | display: flex; |
| 183 | align-items: center; |
| 184 | justify-content: center; |
| 185 | font-weight: bold; |
| 186 | box-shadow: 0 2px 10px rgba(0,0,0,0.3); |
| 187 | cursor: pointer; |
| 188 | z-index: 1000; |
| 189 | } |
| 190 | |
| 191 | .breadcrumb { |
| 192 | display: flex; |
| 193 | padding: 10px 15px; |
| 194 | background: #f9f9f9; |
| 195 | border-bottom: 1px solid #eee; |
| 196 | overflow-x: auto; |
| 197 | white-space: nowrap; |
| 198 | } |
| 199 | |
| 200 | .breadcrumb-item { |
| 201 | font-size: 14px; |
| 202 | color: #007AFF; |
| 203 | cursor: pointer; |
| 204 | padding: 0 5px; |
| 205 | } |
| 206 | |
| 207 | .breadcrumb-item:not(:last-child)::after { |
| 208 | content: " > "; |
| 209 | color: #999; |
| 210 | } |
| 211 | |
| 212 | .breadcrumb-item:last-child { |
| 213 | color: #333; |
| 214 | font-weight: bold; |
| 215 | } |
| 216 | |
| 217 | .node-path { |
| 218 | color: #888; |
| 219 | font-size: 12px; |
| 220 | margin-top: 3px; |
| 221 | } |
| 222 | |
| 223 | .search-mode .tree-node:not(.search-result) .node-path { |
| 224 | display: none; |
| 225 | } |
| 226 | |
| 227 | .virtual-container { |
| 228 | position: relative; |
| 229 | } |
| 230 | |
| 231 | .node-icon { |
| 232 | margin-right: 8px; |
| 233 | font-size: 16px; |
| 234 | } |
| 235 | |
| 236 | .folder-icon::before { |
| 237 | content: "📁"; |
| 238 | } |
| 239 | |
| 240 | .file-icon::before { |
| 241 | content: "📄"; |
| 242 | } |
| 243 | |
| 244 | /* 弹窗样式 */ |
| 245 | .modal { |
| 246 | display: none; |
| 247 | position: fixed; |
| 248 | top: 0; |
| 249 | left: 0; |
| 250 | width: 100%; |
| 251 | height: 100%; |
| 252 | background-color: rgba(0, 0, 0, 0.5); |
| 253 | z-index: 2000; |
| 254 | justify-content: center; |
| 255 | align-items: center; |
| 256 | } |
| 257 | |
| 258 | .modal-content { |
| 259 | background-color: white; |
| 260 | border-radius: 10px; |
| 261 | width: 90%; |
| 262 | max-width: 500px; |
| 263 | max-height: 80vh; |
| 264 | overflow: hidden; |
| 265 | display: flex; |
| 266 | flex-direction: column; |
| 267 | } |
| 268 | |
| 269 | .modal-header { |
| 270 | padding: 15px 20px; |
| 271 | border-bottom: 1px solid #eee; |
| 272 | display: flex; |
| 273 | justify-content: space-between; |
| 274 | align-items: center; |
| 275 | } |
| 276 | |
| 277 | .modal-title { |
| 278 | font-size: 18px; |
| 279 | font-weight: bold; |
| 280 | color: #333; |
| 281 | } |
| 282 | |
| 283 | .modal-close { |
| 284 | background: none; |
| 285 | border: none; |
| 286 | font-size: 24px; |
| 287 | cursor: pointer; |
| 288 | color: #999; |
| 289 | } |
| 290 | |
| 291 | .modal-body { |
| 292 | padding: 10px 20px; |
| 293 | overflow-y: auto; |
| 294 | flex: 1; |
| 295 | } |
| 296 | |
| 297 | .selected-item { |
| 298 | display: flex; |
| 299 | justify-content: space-between; |
| 300 | align-items: center; |
| 301 | padding: 12px 0; |
| 302 | border-bottom: 1px solid #f0f0f0; |
| 303 | } |
| 304 | |
| 305 | .selected-item:last-child { |
| 306 | border-bottom: none; |
| 307 | } |
| 308 | |
| 309 | .item-info { |
| 310 | flex: 1; |
| 311 | } |
| 312 | |
| 313 | .item-name { |
| 314 | font-size: 16px; |
| 315 | color: #333; |
| 316 | } |
| 317 | |
| 318 | .item-path { |
| 319 | font-size: 12px; |
| 320 | color: #888; |
| 321 | margin-top: 3px; |
| 322 | } |
| 323 | |
| 324 | .deselect-btn { |
| 325 | background: #ff3b30; |
| 326 | color: white; |
| 327 | border: none; |
| 328 | border-radius: 4px; |
| 329 | padding: 6px 12px; |
| 330 | font-size: 14px; |
| 331 | cursor: pointer; |
| 332 | } |
| 333 | |
| 334 | .modal-footer { |
| 335 | padding: 15px 20px; |
| 336 | border-top: 1px solid #eee; |
| 337 | display: flex; |
| 338 | justify-content: space-between; |
| 339 | } |
| 340 | |
| 341 | .clear-all-btn { |
| 342 | background: #ff3b30; |
| 343 | color: white; |
| 344 | border: none; |
| 345 | border-radius: 4px; |
| 346 | padding: 10px 20px; |
| 347 | font-size: 16px; |
| 348 | cursor: pointer; |
| 349 | } |
| 350 | |
| 351 | .confirm-btn { |
| 352 | background: #007AFF; |
| 353 | color: white; |
| 354 | border: none; |
| 355 | border-radius: 4px; |
| 356 | padding: 10px 20px; |
| 357 | font-size: 16px; |
| 358 | cursor: pointer; |
| 359 | } |
| 360 | |
| 361 | .empty-selected { |
| 362 | text-align: center; |
| 363 | padding: 30px; |
| 364 | color: #999; |
| 365 | } |
| 366 | |
| 367 | /* 父节点样式调整 */ |
| 368 | .parent-node .node-content { |
| 369 | flex: 1; |
| 370 | } |
| 371 | |
| 372 | .parent-node .node-checkbox { |
| 373 | display: none; |
| 374 | } |
| 375 | </style> |
| 376 | </head> |
| 377 | <body> |
| 378 | <div class="container"> |
| 379 | <div class="search-box"> |
| 380 | <input type="text" class="search-input" id="searchInput" placeholder="输入名称搜索..."> |
| 381 | </div> |
| 382 | |
| 383 | <div class="breadcrumb" id="breadcrumb"></div> |
| 384 | |
| 385 | <div class="result-info" id="resultInfo"></div> |
| 386 | |
| 387 | <div class="tree-container" id="treeContainer"> |
| 388 | <div class="loading" id="loading">加载中...</div> |
| 389 | </div> |
| 390 | </div> |
| 391 | |
| 392 | <div class="selected-count" id="selectedCount">0</div> |
| 393 | |
| 394 | <!-- 已选项弹窗 --> |
| 395 | <div class="modal" id="selectedModal"> |
| 396 | <div class="modal-content"> |
| 397 | <div class="modal-header"> |
| 398 | <div class="modal-title">已选项</div> |
| 399 | <button class="modal-close" id="modalClose">×</button> |
| 400 | </div> |
| 401 | <div class="modal-body" id="modalBody"> |
| 402 | <!-- 已选项将在这里显示 --> |
| 403 | </div> |
| 404 | <div class="modal-footer"> |
| 405 | <button class="clear-all-btn" id="clearAllBtn">清空所有</button> |
| 406 | <button class="confirm-btn" id="confirmBtn">确认</button> |
| 407 | </div> |
| 408 | </div> |
| 409 | </div> |
| 410 | |
| 411 | <script> |
| 412 | // 模拟大量树形数据 |
| 413 | class TreeNode { |
| 414 | constructor(id, name, parentId = null) { |
| 415 | this.id = id; |
| 416 | this.name = name; |
| 417 | this.parentId = parentId; |
| 418 | this.children = []; |
| 419 | this.checked = false; |
| 420 | this.indeterminate = false; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | // 生成大量测试数据，最多5-6级深度 |
| 425 | function generateTreeData() { |
| 426 | console.time('数据生成耗时'); |
| 427 | const rootNode = new TreeNode('0', '根节点'); |
| 428 | const nodeMap = new Map(); |
| 429 | nodeMap.set('0', rootNode); |
| 430 | |
| 431 | // 生成5-6级深度的树结构 |
| 432 | // 第1级: 10个节点 |
| 433 | for (let i = 1; i <= 10; i++) { |
| 434 | const parentId = '0'; |
| 435 | const nodeId = i.toString(); |
| 436 | const nodeName = `一级节点 ${i}`; |
| 437 | const node = new TreeNode(nodeId, nodeName, parentId); |
| 438 | nodeMap.set(nodeId, node); |
| 439 | nodeMap.get(parentId).children.push(node); |
| 440 | } |
| 441 | |
| 442 | // 第2级: 每个一级节点下有20个二级节点 |
| 443 | for (let i = 1; i <= 10; i++) { |
| 444 | for (let j = 1; j <= 20; j++) { |
| 445 | const parentId = i.toString(); |
| 446 | const nodeId = `${i}-${j}`; |
| 447 | const nodeName = `二级节点 ${i}-${j}`; |
| 448 | const node = new TreeNode(nodeId, nodeName, parentId); |
| 449 | nodeMap.set(nodeId, node); |
| 450 | nodeMap.get(parentId).children.push(node); |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | // 第3级: 每个二级节点下有15个三级节点 |
| 455 | for (let i = 1; i <= 10; i++) { |
| 456 | for (let j = 1; j <= 20; j++) { |
| 457 | for (let k = 1; k <= 15; k++) { |
| 458 | const parentId = `${i}-${j}`; |
| 459 | const nodeId = `${i}-${j}-${k}`; |
| 460 | const nodeName = `三级节点 ${i}-${j}-${k}`; |
| 461 | const node = new TreeNode(nodeId, nodeName, parentId); |
| 462 | nodeMap.set(nodeId, node); |
| 463 | nodeMap.get(parentId).children.push(node); |
| 464 | } |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | // 第4级: 每个三级节点下有10个四级节点 |
| 469 | for (let i = 1; i <= 10; i++) { |
| 470 | for (let j = 1; j <= 20; j++) { |
| 471 | for (let k = 1; k <= 15; k++) { |
| 472 | for (let l = 1; l <= 10; l++) { |
| 473 | const parentId = `${i}-${j}-${k}`; |
| 474 | const nodeId = `${i}-${j}-${k}-${l}`; |
| 475 | const nodeName = `四级节点 ${i}-${j}-${k}-${l}`; |
| 476 | const node = new TreeNode(nodeId, nodeName, parentId); |
| 477 | nodeMap.set(nodeId, node); |
| 478 | nodeMap.get(parentId).children.push(node); |
| 479 | } |
| 480 | } |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | // 第5级: 每个四级节点下有5个五级节点 |
| 485 | for (let i = 1; i <= 10; i++) { |
| 486 | for (let j = 1; j <= 20; j++) { |
| 487 | for (let k = 1; k <= 15; k++) { |
| 488 | for (let l = 1; l <= 10; l++) { |
| 489 | for (let m = 1; m <= 5; m++) { |
| 490 | const parentId = `${i}-${j}-${k}-${l}`; |
| 491 | const nodeId = `${i}-${j}-${k}-${l}-${m}`; |
| 492 | const nodeName = `五级节点 ${i}-${j}-${k}-${l}-${m}`; |
| 493 | const node = new TreeNode(nodeId, nodeName, parentId); |
| 494 | nodeMap.set(nodeId, node); |
| 495 | nodeMap.get(parentId).children.push(node); |
| 496 | } |
| 497 | } |
| 498 | } |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | // 第6级: 部分五级节点下有六级节点 |
| 503 | for (let i = 1; i <= 10; i++) { |
| 504 | for (let j = 1; j <= 20; j++) { |
| 505 | for (let k = 1; k <= 15; k++) { |
| 506 | for (let l = 1; l <= 10; l++) { |
| 507 | for (let m = 1; m <= 5; m++) { |
| 508 | // 只为部分节点添加六级节点 |
| 509 | if (Math.random() > 0.7) { |
| 510 | for (let n = 1; n <= 3; n++) { |
| 511 | const parentId = `${i}-${j}-${k}-${l}-${m}`; |
| 512 | const nodeId = `${i}-${j}-${k}-${l}-${m}-${n}`; |
| 513 | const nodeName = `六级节点 ${i}-${j}-${k}-${l}-${m}-${n}`; |
| 514 | const node = new TreeNode(nodeId, nodeName, parentId); |
| 515 | nodeMap.set(nodeId, node); |
| 516 | nodeMap.get(parentId).children.push(node); |
| 517 | } |
| 518 | } |
| 519 | } |
| 520 | } |
| 521 | } |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | console.timeEnd('数据生成耗时'); |
| 526 | console.log(rootNode); |
| 527 | return rootNode; |
| 528 | } |
| 529 | |
| 530 | // 树形列表组件 |
| 531 | class TreeSelector { |
| 532 | constructor(container, rootNode) { |
| 533 | this.container = container; |
| 534 | this.rootNode = rootNode; |
| 535 | this.currentNode = rootNode; |
| 536 | this.path = [rootNode]; |
| 537 | this.selectedNodes = new Set(); |
| 538 | this.searchResults = new Set(); |
| 539 | this.searchMode = false; |
| 540 | this.searchTerm = ''; |
| 541 | |
| 542 | // 虚拟滚动相关 |
| 543 | this.nodeHeight = 50; // 每个节点的高度 |
| 544 | this.buffer = 15; // 缓冲区节点数 |
| 545 | this.scrollTop = 0; |
| 546 | this.containerHeight = 0; |
| 547 | |
| 548 | // 创建节点ID到节点的映射以提高查找性能 |
| 549 | this.nodeMap = new Map(); |
| 550 | this.buildNodeMap(rootNode); |
| 551 | console.log('节点ID到节点数量',this.nodeMap.size) |
| 552 | |
| 553 | // 构建父节点映射以提高查找性能 |
| 554 | this.parentMap = new Map(); |
| 555 | this.buildParentMap(rootNode); |
| 556 | |
| 557 | // 构建节点路径映射 |
| 558 | this.nodePathMap = new Map(); |
| 559 | this.buildNodePathMap(rootNode, []); |
| 560 | |
| 561 | // 初始化虚拟滚动 |
| 562 | this.initVirtualScroll(); |
| 563 | |
| 564 | this.render(); |
| 565 | this.bindEvents(); |
| 566 | this.updateSelectedCount(); |
| 567 | this.initModal(); |
| 568 | } |
| 569 | |
| 570 | // 构建节点路径映射 |
| 571 | buildNodePathMap(node, path) { |
| 572 | const currentPath = [...path, node.name]; |
| 573 | this.nodePathMap.set(node.id, currentPath); |
| 574 | |
| 575 | if (node.children) { |
| 576 | node.children.forEach(child => { |
| 577 | this.buildNodePathMap(child, currentPath); |
| 578 | }); |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | // 初始化弹窗 |
| 583 | initModal() { |
| 584 | const modal = document.getElementById('selectedModal'); |
| 585 | const selectedCount = document.getElementById('selectedCount'); |
| 586 | const modalClose = document.getElementById('modalClose'); |
| 587 | const clearAllBtn = document.getElementById('clearAllBtn'); |
| 588 | const confirmBtn = document.getElementById('confirmBtn'); |
| 589 | |
| 590 | // 点击已选数量按钮打开弹窗 |
| 591 | selectedCount.addEventListener('click', () => { |
| 592 | this.showSelectedModal(); |
| 593 | }); |
| 594 | |
| 595 | // 点击关闭按钮关闭弹窗 |
| 596 | modalClose.addEventListener('click', () => { |
| 597 | this.closeSelectedModal(); |
| 598 | }); |
| 599 | |
| 600 | // 点击清空所有按钮 |
| 601 | clearAllBtn.addEventListener('click', () => { |
| 602 | this.clearAllSelections(); |
| 603 | }); |
| 604 | |
| 605 | // 点击确认按钮 |
| 606 | confirmBtn.addEventListener('click', () => { |
| 607 | this.confirmSelections(); |
| 608 | }); |
| 609 | |
| 610 | // 点击遮罩层关闭弹窗 |
| 611 | modal.addEventListener('click', (e) => { |
| 612 | if (e.target === modal) { |
| 613 | this.closeSelectedModal(); |
| 614 | } |
| 615 | }); |
| 616 | } |
| 617 | |
| 618 | // 显示已选项弹窗 |
| 619 | showSelectedModal() { |
| 620 | const modal = document.getElementById('selectedModal'); |
| 621 | const modalBody = document.getElementById('modalBody'); |
| 622 | |
| 623 | // 获取所有选中的节点 |
| 624 | const selectedNodes = []; |
| 625 | for (const [id, node] of this.nodeMap) { |
| 626 | if (node.checked) { |
| 627 | selectedNodes.push(node); |
| 628 | } |
| 629 | } |
| 630 | |
| 631 | // 清空弹窗内容 |
| 632 | modalBody.innerHTML = ''; |
| 633 | |
| 634 | // 显示选中项 |
| 635 | if (selectedNodes.length === 0) { |
| 636 | modalBody.innerHTML = '<div class="empty-selected">暂无选中项</div>'; |
| 637 | } else { |
| 638 | selectedNodes.forEach(node => { |
| 639 | const itemElement = document.createElement('div'); |
| 640 | itemElement.className = 'selected-item'; |
| 641 | |
| 642 | const itemInfo = document.createElement('div'); |
| 643 | itemInfo.className = 'item-info'; |
| 644 | |
| 645 | const itemName = document.createElement('div'); |
| 646 | itemName.className = 'item-name'; |
| 647 | itemName.textContent = node.name; |
| 648 | |
| 649 | const itemPath = document.createElement('div'); |
| 650 | itemPath.className = 'item-path'; |
| 651 | itemPath.textContent = this.nodePathMap.get(node.id).join(' > '); |
| 652 | |
| 653 | itemInfo.appendChild(itemName); |
| 654 | itemInfo.appendChild(itemPath); |
| 655 | |
| 656 | const deselectBtn = document.createElement('button'); |
| 657 | deselectBtn.className = 'deselect-btn'; |
| 658 | deselectBtn.textContent = '取消'; |
| 659 | deselectBtn.addEventListener('click', () => { |
| 660 | this.deselectNode(node); |
| 661 | }); |
| 662 | |
| 663 | itemElement.appendChild(itemInfo); |
| 664 | itemElement.appendChild(deselectBtn); |
| 665 | |
| 666 | modalBody.appendChild(itemElement); |
| 667 | }); |
| 668 | } |
| 669 | |
| 670 | // 显示弹窗 |
| 671 | modal.style.display = 'flex'; |
| 672 | } |
| 673 | |
| 674 | // 关闭已选项弹窗 |
| 675 | closeSelectedModal() { |
| 676 | const modal = document.getElementById('selectedModal'); |
| 677 | modal.style.display = 'none'; |
| 678 | } |
| 679 | |
| 680 | // 取消选中节点 |
| 681 | deselectNode(node) { |
| 682 | node.checked = false; |
| 683 | node.indeterminate = false; |
| 684 | |
| 685 | // 更新子节点状态 |
| 686 | this.updateChildren(node, false); |
| 687 | |
| 688 | // 更新父节点状态 |
| 689 | this.updateParents(node); |
| 690 | |
| 691 | // 更新选中计数 |
| 692 | this.updateSelectedCount(); |
| 693 | |
| 694 | // 更新UI |
| 695 | this.updateCheckboxUI(node); |
| 696 | |
| 697 | // 重新渲染弹窗 |
| 698 | this.showSelectedModal(); |
| 699 | } |
| 700 | |
| 701 | // 清空所有选择 |
| 702 | clearAllSelections() { |
| 703 | for (const [id, node] of this.nodeMap) { |
| 704 | if (node.checked) { |
| 705 | node.checked = false; |
| 706 | node.indeterminate = false; |
| 707 | this.updateCheckboxUI(node); |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | // 更新选中计数 |
| 712 | this.updateSelectedCount(); |
| 713 | |
| 714 | // 重新渲染弹窗 |
| 715 | this.showSelectedModal(); |
| 716 | } |
| 717 | |
| 718 | // 确认选择并打印到控制台 |
| 719 | confirmSelections() { |
| 720 | const selectedNodes = []; |
| 721 | for (const [id, node] of this.nodeMap) { |
| 722 | if (node.checked) { |
| 723 | selectedNodes.push({ |
| 724 | id: node.id, |
| 725 | name: node.name, |
| 726 | path: this.nodePathMap.get(node.id).join(' > ') |
| 727 | }); |
| 728 | } |
| 729 | } |
| 730 | |
| 731 | console.log('已选项:', selectedNodes); |
| 732 | alert(`已选择 ${selectedNodes.length} 项，详情请查看控制台`); |
| 733 | |
| 734 | // 关闭弹窗 |
| 735 | this.closeSelectedModal(); |
| 736 | } |
| 737 | |
| 738 | // 初始化虚拟滚动 |
| 739 | initVirtualScroll() { |
| 740 | let ticking = false; |
| 741 | |
| 742 | const handleScroll = () => { |
| 743 | this.scrollTop = this.container.scrollTop; |
| 744 | if (!ticking) { |
| 745 | requestAnimationFrame(() => { |
| 746 | this.render(); |
| 747 | ticking = false; |
| 748 | }); |
| 749 | ticking = true; |
| 750 | } |
| 751 | }; |
| 752 | |
| 753 | this.container.addEventListener('scroll', handleScroll); |
| 754 | |
| 755 | // 获取容器高度 |
| 756 | this.containerHeight = this.container.clientHeight; |
| 757 | } |
| 758 | |
| 759 | // 构建节点ID到节点的映射 |
| 760 | buildNodeMap(node) { |
| 761 | this.nodeMap.set(node.id, node); |
| 762 | if (node.children) { |
| 763 | node.children.forEach(child => this.buildNodeMap(child)); |
| 764 | } |
| 765 | } |
| 766 | |
| 767 | // 构建父节点映射 |
| 768 | buildParentMap(node) { |
| 769 | if (node.children) { |
| 770 | node.children.forEach(child => { |
| 771 | this.parentMap.set(child.id, node); |
| 772 | this.buildParentMap(child); |
| 773 | }); |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | // 渲染树形结构 |
| 778 | render() { |
| 779 | if (this.searchMode) { |
| 780 | this.renderSearchResults(); |
| 781 | } else { |
| 782 | this.renderTree(); |
| 783 | } |
| 784 | |
| 785 | this.renderBreadcrumb(); |
| 786 | this.updateResultInfo(); |
| 787 | } |
| 788 | |
| 789 | // 渲染普通树结构（虚拟滚动） |
| 790 | renderTree() { |
| 791 | // 获取当前路径下的所有节点 |
| 792 | const allNodes = this.flattenTree(this.currentNode, 0); |
| 793 | |
| 794 | // 计算可见节点范围 |
| 795 | const startIndex = Math.max(0, Math.floor(this.scrollTop / this.nodeHeight) - this.buffer); |
| 796 | const endIndex = Math.min( |
| 797 | allNodes.length, |
| 798 | Math.ceil((this.scrollTop + this.containerHeight) / this.nodeHeight) + this.buffer |
| 799 | ); |
| 800 | |
| 801 | // 获取可见节点 |
| 802 | const visibleNodes = allNodes.slice(startIndex, endIndex); |
| 803 | |
| 804 | // 创建或获取虚拟容器 |
| 805 | let virtualContainer = this.container.querySelector('.virtual-container'); |
| 806 | if (!virtualContainer) { |
| 807 | virtualContainer = document.createElement('div'); |
| 808 | virtualContainer.className = 'virtual-container'; |
| 809 | this.container.innerHTML = ''; |
| 810 | this.container.appendChild(virtualContainer); |
| 811 | } |
| 812 | |
| 813 | // 设置虚拟容器高度 |
| 814 | virtualContainer.style.height = `${allNodes.length * this.nodeHeight}px`; |
| 815 | |
| 816 | // 获取所有现有的节点元素 |
| 817 | const existingNodes = Array.from(virtualContainer.querySelectorAll('.tree-node')); |
| 818 | |
| 819 | // 创建一个映射来跟踪哪些节点已经存在 |
| 820 | const existingNodeMap = new Map(); |
| 821 | existingNodes.forEach(nodeEl => { |
| 822 | existingNodeMap.set(nodeEl.dataset.id, nodeEl); |
| 823 | }); |
| 824 | |
| 825 | // 移除不再需要的节点 |
| 826 | const visibleNodeIds = new Set(visibleNodes.map(item => item.node.id)); |
| 827 | existingNodes.forEach(nodeEl => { |
| 828 | if (!visibleNodeIds.has(nodeEl.dataset.id)) { |
| 829 | nodeEl.remove(); |
| 830 | } |
| 831 | }); |
| 832 | |
| 833 | // 更新或创建可见节点 |
| 834 | visibleNodes.forEach((item, index) => { |
| 835 | const nodeId = item.node.id; |
| 836 | let nodeElement = existingNodeMap.get(nodeId); |
| 837 | |
| 838 | if (!nodeElement) { |
| 839 | // 创建新节点 |
| 840 | nodeElement = this.createNodeElement(item.node, item.depth); |
| 841 | virtualContainer.appendChild(nodeElement); |
| 842 | } |
| 843 | |
| 844 | // 更新节点位置 |
| 845 | nodeElement.style.top = `${(index + startIndex) * this.nodeHeight}px`; |
| 846 | }); |
| 847 | } |
| 848 | |
| 849 | // 展平树结构 |
| 850 | flattenTree(node, depth) { |
| 851 | const result = [{ node, depth }]; |
| 852 | |
| 853 | if (node.expanded && node.children && node.children.length > 0) { |
| 854 | node.children.forEach(child => { |
| 855 | result.push(...this.flattenTree(child, depth + 1)); |
| 856 | }); |
| 857 | } |
| 858 | |
| 859 | return result; |
| 860 | } |
| 861 | |
| 862 | // 创建节点元素 |
| 863 | createNodeElement(node, depth) { |
| 864 | // 判断是否为父节点（有子节点） |
| 865 | const isParent = node.children && node.children.length > 0; |
| 866 | |
| 867 | const nodeElement = document.createElement('div'); |
| 868 | nodeElement.className = `tree-node ${isParent ? 'parent-node' : ''} indent-${Math.min(depth, 10)}`; |
| 869 | nodeElement.dataset.id = node.id; |
| 870 | |
| 871 | // 展开/收起按钮 |
| 872 | const toggleElement = document.createElement('div'); |
| 873 | toggleElement.className = `node-toggle ${!isParent ? 'empty' : ''} ${node.expanded ? 'expanded' : ''}`; |
| 874 | toggleElement.innerHTML = '▶'; |
| 875 | nodeElement.appendChild(toggleElement); |
| 876 | |
| 877 | // 节点内容 |
| 878 | const contentElement = document.createElement('div'); |
| 879 | contentElement.className = 'node-content'; |
| 880 | contentElement.textContent = node.name; |
| 881 | nodeElement.appendChild(contentElement); |
| 882 | |
| 883 | // 只为叶节点添加复选框 |
| 884 | if (!isParent) { |
| 885 | const checkboxElement = document.createElement('div'); |
| 886 | checkboxElement.className = `node-checkbox ${node.checked ? 'checked' : ''} ${node.indeterminate && !node.checked ? 'indeterminate' : ''}`; |
| 887 | nodeElement.appendChild(checkboxElement); |
| 888 | } |
| 889 | |
| 890 | return nodeElement; |
| 891 | } |
| 892 | |
| 893 | // 渲染搜索结果（扁平列表，带虚拟滚动） |
| 894 | renderSearchResults() { |
| 895 | if (this.searchResults.size === 0) { |
| 896 | const noResultsElement = document.createElement('div'); |
| 897 | noResultsElement.className = 'no-results'; |
| 898 | noResultsElement.textContent = '未找到匹配结果'; |
| 899 | this.container.innerHTML = ''; |
| 900 | this.container.appendChild(noResultsElement); |
| 901 | return; |
| 902 | } |
| 903 | |
| 904 | // 将搜索结果转换为数组并排序 |
| 905 | const resultsArray = Array.from(this.searchResults).sort((a, b) => { |
| 906 | return a.name.localeCompare(b.name); |
| 907 | }); |
| 908 | |
| 909 | // 计算可见节点范围 |
| 910 | const startIndex = Math.max(0, Math.floor(this.scrollTop / this.nodeHeight) - this.buffer); |
| 911 | const endIndex = Math.min( |
| 912 | resultsArray.length, |
| 913 | Math.ceil((this.scrollTop + this.containerHeight) / this.nodeHeight) + this.buffer |
| 914 | ); |
| 915 | |
| 916 | // 获取可见节点 |
| 917 | const visibleResults = resultsArray.slice(startIndex, endIndex); |
| 918 | |
| 919 | // 创建或获取虚拟容器 |
| 920 | let virtualContainer = this.container.querySelector('.virtual-container'); |
| 921 | if (!virtualContainer) { |
| 922 | virtualContainer = document.createElement('div'); |
| 923 | virtualContainer.className = 'virtual-container'; |
| 924 | this.container.innerHTML = ''; |
| 925 | this.container.appendChild(virtualContainer); |
| 926 | } |
| 927 | |
| 928 | // 设置虚拟容器高度 |
| 929 | virtualContainer.style.height = `${resultsArray.length * this.nodeHeight}px`; |
| 930 | |
| 931 | // 获取所有现有的节点元素 |
| 932 | const existingNodes = Array.from(virtualContainer.querySelectorAll('.tree-node')); |
| 933 | |
| 934 | // 创建一个映射来跟踪哪些节点已经存在 |
| 935 | const existingNodeMap = new Map(); |
| 936 | existingNodes.forEach(nodeEl => { |
| 937 | existingNodeMap.set(nodeEl.dataset.id, nodeEl); |
| 938 | }); |
| 939 | |
| 940 | // 移除不再需要的节点 |
| 941 | const visibleNodeIds = new Set(visibleResults.map(node => node.id)); |
| 942 | existingNodes.forEach(nodeEl => { |
| 943 | if (!visibleNodeIds.has(nodeEl.dataset.id)) { |
| 944 | nodeEl.remove(); |
| 945 | } |
| 946 | }); |
| 947 | |
| 948 | // 更新或创建可见节点 |
| 949 | visibleResults.forEach((node, index) => { |
| 950 | let nodeElement = existingNodeMap.get(node.id); |
| 951 | |
| 952 | if (!nodeElement) { |
| 953 | // 创建新节点 |
| 954 | nodeElement = this.createSearchResultElement(node); |
| 955 | virtualContainer.appendChild(nodeElement); |
| 956 | } |
| 957 | |
| 958 | // 更新节点位置 |
| 959 | nodeElement.style.top = `${(index + startIndex) * this.nodeHeight}px`; |
| 960 | }); |
| 961 | } |
| 962 | |
| 963 | // 创建搜索结果元素 |
| 964 | createSearchResultElement(node) { |
| 965 | // 判断是否为父节点（有子节点） |
| 966 | const isParent = node.children && node.children.length > 0; |
| 967 | |
| 968 | const nodeElement = document.createElement('div'); |
| 969 | nodeElement.className = `tree-node search-result ${isParent ? 'parent-node' : ''}`; |
| 970 | nodeElement.dataset.id = node.id; |
| 971 | |
| 972 | // 节点图标（文件夹或文件） |
| 973 | const iconElement = document.createElement('div'); |
| 974 | iconElement.className = `node-icon ${isParent ? 'folder-icon' : 'file-icon'}`; |
| 975 | nodeElement.appendChild(iconElement); |
| 976 | |
| 977 | // 节点内容 |
| 978 | const contentElement = document.createElement('div'); |
| 979 | contentElement.className = 'node-content'; |
| 980 | contentElement.textContent = node.name; |
| 981 | nodeElement.appendChild(contentElement); |
| 982 | |
| 983 | // 只为叶节点添加复选框 |
| 984 | if (!isParent) { |
| 985 | const checkboxElement = document.createElement('div'); |
| 986 | checkboxElement.className = `node-checkbox ${node.checked ? 'checked' : ''} ${node.indeterminate && !node.checked ? 'indeterminate' : ''}`; |
| 987 | nodeElement.appendChild(checkboxElement); |
| 988 | } |
| 989 | |
| 990 | return nodeElement; |
| 991 | } |
| 992 | |
| 993 | // 渲染面包屑导航 |
| 994 | renderBreadcrumb() { |
| 995 | const breadcrumb = document.getElementById('breadcrumb'); |
| 996 | if (!breadcrumb) return; |
| 997 | |
| 998 | breadcrumb.innerHTML = ''; |
| 999 | |
| 1000 | this.path.forEach((node, index) => { |
| 1001 | const item = document.createElement('div'); |
| 1002 | item.className = 'breadcrumb-item'; |
| 1003 | item.textContent = node.name; |
| 1004 | item.onclick = () => this.navigateTo(index); |
| 1005 | breadcrumb.appendChild(item); |
| 1006 | }); |
| 1007 | } |
| 1008 | |
| 1009 | // 更新结果信息 |
| 1010 | updateResultInfo() { |
| 1011 | const info = document.getElementById('resultInfo'); |
| 1012 | if (!info) return; |
| 1013 | |
| 1014 | if (this.searchMode) { |
| 1015 | info.textContent = `找到 ${this.searchResults.size} 个匹配结果`; |
| 1016 | } else { |
| 1017 | info.textContent = ''; |
| 1018 | } |
| 1019 | } |
| 1020 | |
| 1021 | // 绑定事件 |
| 1022 | bindEvents() { |
| 1023 | // 搜索事件 |
| 1024 | const searchInput = document.getElementById('searchInput'); |
| 1025 | if (!searchInput) return; |
| 1026 | |
| 1027 | let searchTimeout; |
| 1028 | searchInput.addEventListener('input', (e) => { |
| 1029 | clearTimeout(searchTimeout); |
| 1030 | searchTimeout = setTimeout(() => { |
| 1031 | this.search(e.target.value); |
| 1032 | }, 300); |
| 1033 | }); |
| 1034 | |
| 1035 | // 节点点击事件代理 |
| 1036 | this.container.addEventListener('click', (e) => { |
| 1037 | const nodeElement = e.target.closest('.tree-node'); |
| 1038 | if (!nodeElement) return; |
| 1039 | |
| 1040 | const nodeId = nodeElement.dataset.id; |
| 1041 | const node = this.nodeMap.get(nodeId); |
| 1042 | if (!node) return; |
| 1043 | |
| 1044 | // 在搜索模式下，点击节点行为不同 |
| 1045 | if (this.searchMode) { |
| 1046 | // 点击复选框 |
| 1047 | if (e.target.classList.contains('node-checkbox')) { |
| 1048 | this.toggleCheckbox(node); |
| 1049 | return; |
| 1050 | } |
| 1051 | |
| 1052 | // 点击节点内容 - 进入浏览模式并导航到该节点 |
| 1053 | this.enterNodeFromSearch(node); |
| 1054 | return; |
| 1055 | } |
| 1056 | |
| 1057 | // 在浏览模式下保持原有行为 |
| 1058 | // 点击展开/收起按钮 |
| 1059 | if (e.target.classList.contains('node-toggle')) { |
| 1060 | this.toggleNode(node); |
| 1061 | return; |
| 1062 | } |
| 1063 | |
| 1064 | // 点击复选框 |
| 1065 | if (e.target.classList.contains('node-checkbox')) { |
| 1066 | this.toggleCheckbox(node); |
| 1067 | return; |
| 1068 | } |
| 1069 | |
| 1070 | // 点击节点内容（如果是父节点） |
| 1071 | if (e.target.classList.contains('node-content') || e.target.closest('.node-content')) { |
| 1072 | if (node.children && node.children.length > 0) { |
| 1073 | this.enterNode(node); |
| 1074 | } else { |
| 1075 | // 点击叶节点时切换选中状态 |
| 1076 | this.toggleCheckbox(node); |
| 1077 | } |
| 1078 | return; |
| 1079 | } |
| 1080 | }); |
| 1081 | } |
| 1082 | |
| 1083 | // 从搜索结果进入节点浏览 |
| 1084 | enterNodeFromSearch(node) { |
| 1085 | // 构建从根节点到目标节点的路径 |
| 1086 | const path = []; |
| 1087 | let current = node; |
| 1088 | |
| 1089 | // 向上遍历到根节点 |
| 1090 | while (current) { |
| 1091 | path.unshift(current); |
| 1092 | current = this.parentMap.get(current.id); |
| 1093 | } |
| 1094 | |
| 1095 | // 设置路径并切换到浏览模式 |
| 1096 | this.path = path; |
| 1097 | this.currentNode = node; |
| 1098 | this.searchMode = false; |
| 1099 | this.searchTerm = ''; |
| 1100 | const searchInput = document.getElementById('searchInput'); |
| 1101 | if (searchInput) { |
| 1102 | searchInput.value = ''; |
| 1103 | } |
| 1104 | |
| 1105 | // 展开目标节点 |
| 1106 | node.expanded = true; |
| 1107 | |
| 1108 | this.scrollTop = 0; |
| 1109 | this.container.scrollTop = 0; |
| 1110 | this.render(); |
| 1111 | } |
| 1112 | |
| 1113 | // 搜索功能 - 优化版本 |
| 1114 | search(term) { |
| 1115 | console.time('搜索耗时'); |
| 1116 | this.searchTerm = term.trim().toLowerCase(); |
| 1117 | this.searchMode = this.searchTerm !== ''; |
| 1118 | |
| 1119 | if (!this.searchMode) { |
| 1120 | this.searchResults.clear(); |
| 1121 | this.scrollTop = 0; |
| 1122 | this.container.scrollTop = 0; |
| 1123 | this.render(); |
| 1124 | console.timeEnd('搜索耗时'); |
| 1125 | return; |
| 1126 | } |
| 1127 | |
| 1128 | this.searchResults.clear(); |
| 1129 | |
| 1130 | // 使用优化的搜索算法 |
| 1131 | // 遍历所有节点查找匹配项 |
| 1132 | for (const [id, node] of this.nodeMap) { |
| 1133 | // 检查节点名称是否匹配 |
| 1134 | if (node.name.toLowerCase().includes(this.searchTerm)) { |
| 1135 | this.searchResults.add(node); |
| 1136 | } |
| 1137 | } |
| 1138 | |
| 1139 | this.scrollTop = 0; |
| 1140 | this.container.scrollTop = 0; |
| 1141 | console.timeEnd('搜索耗时'); |
| 1142 | this.render(); |
| 1143 | } |
| 1144 | |
| 1145 | // 展开/收起节点 |
| 1146 | toggleNode(node) { |
| 1147 | node.expanded = !node.expanded; |
| 1148 | this.render(); |
| 1149 | } |
| 1150 | |
| 1151 | // 进入节点（用于浏览模式） |
| 1152 | enterNode(node) { |
| 1153 | // 检查节点是否已经在路径中，避免重复添加 |
| 1154 | const nodeIndex = this.path.findIndex(n => n.id === node.id); |
| 1155 | if (nodeIndex !== -1) { |
| 1156 | // 如果节点已存在，截断路径到该节点位置 |
| 1157 | this.path = this.path.slice(0, nodeIndex + 1); |
| 1158 | } else { |
| 1159 | // 否则添加到路径末尾 |
| 1160 | this.path.push(node); |
| 1161 | } |
| 1162 | this.currentNode = node; |
| 1163 | this.scrollTop = 0; |
| 1164 | this.container.scrollTop = 0; |
| 1165 | this.render(); |
| 1166 | } |
| 1167 | |
| 1168 | // 导航到指定路径层级 |
| 1169 | navigateTo(index) { |
| 1170 | this.path = this.path.slice(0, index + 1); |
| 1171 | this.currentNode = this.path[this.path.length - 1]; |
| 1172 | this.scrollTop = 0; |
| 1173 | this.container.scrollTop = 0; |
| 1174 | this.render(); |
| 1175 | } |
| 1176 | |
| 1177 | // 切换复选框状态 |
| 1178 | toggleCheckbox(node) { |
| 1179 | node.checked = !node.checked; |
| 1180 | node.indeterminate = false; |
| 1181 | |
| 1182 | // 更新子节点状态 |
| 1183 | this.updateChildren(node, node.checked); |
| 1184 | |
| 1185 | // 更新父节点状态 |
| 1186 | this.updateParents(node); |
| 1187 | |
| 1188 | // 更新选中计数 |
| 1189 | this.updateSelectedCount(); |
| 1190 | |
| 1191 | // 更新UI |
| 1192 | this.updateCheckboxUI(node); |
| 1193 | } |
| 1194 | |
| 1195 | // 更新子节点状态 |
| 1196 | updateChildren(node, checked) { |
| 1197 | if (node.children) { |
| 1198 | node.children.forEach(child => { |
| 1199 | child.checked = checked; |
| 1200 | child.indeterminate = false; |
| 1201 | this.updateChildren(child, checked); |
| 1202 | }); |
| 1203 | } |
| 1204 | } |
| 1205 | |
| 1206 | // 更新父节点状态 |
| 1207 | updateParents(node) { |
| 1208 | const parent = this.parentMap.get(node.id); |
| 1209 | if (!parent) return; |
| 1210 | |
| 1211 | // 检查是否所有子节点都被选中 |
| 1212 | const allChecked = parent.children.every(child => child.checked); |
| 1213 | const someChecked = parent.children.some(child => child.checked || child.indeterminate); |
| 1214 | |
| 1215 | parent.checked = allChecked; |
| 1216 | parent.indeterminate = !allChecked && someChecked; |
| 1217 | |
| 1218 | // 更新UI |
| 1219 | this.updateCheckboxUI(parent); |
| 1220 | |
| 1221 | // 递归更新祖先节点 |
| 1222 | this.updateParents(parent); |
| 1223 | } |
| 1224 | |
| 1225 | // 更新复选框UI状态 |
| 1226 | updateCheckboxUI(node) { |
| 1227 | // 更新所有匹配的节点元素（可能在不同视图中存在） |
| 1228 | const nodeElements = this.container.querySelectorAll(`.tree-node[data-id="${node.id}"]`); |
| 1229 | nodeElements.forEach(nodeElement => { |
| 1230 | // 只为叶节点更新复选框 |
| 1231 | if (!nodeElement.classList.contains('parent-node')) { |
| 1232 | const checkbox = nodeElement.querySelector('.node-checkbox'); |
| 1233 | if (checkbox) { |
| 1234 | checkbox.className = `node-checkbox ${node.checked ? 'checked' : ''} ${node.indeterminate && !node.checked ? 'indeterminate' : ''}`; |
| 1235 | } |
| 1236 | } |
| 1237 | }); |
| 1238 | } |
| 1239 | |
| 1240 | // 更新选中计数 |
| 1241 | updateSelectedCount() { |
| 1242 | const count = document.getElementById('selectedCount'); |
| 1243 | if (!count) return; |
| 1244 | |
| 1245 | const selectedCount = this.getSelectedCount(); |
| 1246 | count.textContent = selectedCount; |
| 1247 | } |
| 1248 | |
| 1249 | // 获取选中节点数量 |
| 1250 | getSelectedCount() { |
| 1251 | let count = 0; |
| 1252 | |
| 1253 | // 使用Map遍历提高性能 |
| 1254 | for (const [id, node] of this.nodeMap) { |
| 1255 | if (node.checked) { |
| 1256 | count++; |
| 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | return count; |
| 1261 | } |
| 1262 | } |
| 1263 | |
| 1264 | // 初始化应用 |
| 1265 | document.addEventListener('DOMContentLoaded', () => { |
| 1266 | const treeContainer = document.getElementById('treeContainer'); |
| 1267 | const loadingElement = document.getElementById('loading'); |
| 1268 | |
| 1269 | // 模拟数据加载 |
| 1270 | setTimeout(() => { |
| 1271 | if (loadingElement) { |
| 1272 | loadingElement.style.display = 'none'; |
| 1273 | } |
| 1274 | |
| 1275 | const rootNode = generateTreeData(); |
| 1276 | const treeSelector = new TreeSelector(treeContainer, rootNode); |
| 1277 | |
| 1278 | // 保存引用以便调试 |
| 1279 | window.treeSelector = treeSelector; |
| 1280 | }, 500); |
| 1281 | }); |
| 1282 | </script> |
| 1283 | </body> |
| 1284 | </html> |