606 lines
16 KiB
Vue
606 lines
16 KiB
Vue
<template>
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<view>
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<template v-if="showLoading">
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<view class="ly-loader ly-flex-center">
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<view class="ly-loader-inner">加载中...</view>
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</view>
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</template>
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<template v-else>
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<view v-if="isEmpty || !visible"
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class="ly-empty">
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{{emptyText}}
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</view>
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<view :key="updateKey"
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class="ly-tree"
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:class="{'is-empty': isEmpty || !visible}"
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role="tree"
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name="LyTreeExpand">
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<ly-tree-node v-for="nodeId in childNodesId"
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:nodeId="nodeId"
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:render-after-expand="renderAfterExpand"
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:show-checkbox="showCheckbox"
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:show-radio="showRadio"
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:check-only-leaf="checkOnlyLeaf"
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:key="getNodeKey(nodeId)"
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:indent="indent"
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:icon-class="iconClass">
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</ly-tree-node>
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</view>
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</template>
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</view>
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</template>
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<script>
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import Vue from 'vue'
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import TreeStore from './model/tree-store.js';
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import {getNodeKey} from './tool/util.js';
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import LyTreeNode from './ly-tree-node.vue';
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export default {
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name: 'LyTree',
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componentName: 'LyTree',
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components: {
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LyTreeNode
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},
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data() {
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return {
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updateKey: new Date().getTime(), // 数据更新的时候,重新渲染树
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elId: `ly_${Math.ceil(Math.random() * 10e5).toString(36)}`,
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visible: true,
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store: {
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ready: false
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},
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currentNode: null,
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childNodesId: []
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};
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},
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provide() {
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return {
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tree: this
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}
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},
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props: {
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// 展示数据
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treeData: Array,
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// 自主控制loading加载,避免数据还没获取到的空档出现“暂无数据”字样
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ready: {
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type: Boolean,
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default: true
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},
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// 内容为空的时候展示的文本
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emptyText: {
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type: String,
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default: '暂无数据'
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},
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// 是否在第一次展开某个树节点后才渲染其子节点
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renderAfterExpand: {
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type: Boolean,
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default: true
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},
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// 每个树节点用来作为唯一标识的属性,整棵树应该是唯一的
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nodeKey: String,
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// 在显示复选框的情况下,是否严格的遵循父子不互相关联的做法,默认为 false
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checkStrictly: Boolean,
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// 是否默认展开所有节点
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defaultExpandAll: Boolean,
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// 切换全部展开、全部折叠
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toggleExpendAll: Boolean,
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// 是否在点击节点的时候展开或者收缩节点, 默认值为 true,如果为 false,则只有点箭头图标的时候才会展开或者收缩节点
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expandOnClickNode: {
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type: Boolean,
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default: true
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},
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// 选中的时候展开节点
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expandOnCheckNode: {
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type: Boolean,
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default: true
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},
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// 是否在点击节点的时候选中节点,默认值为 false,即只有在点击复选框时才会选中节点
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checkOnClickNode: Boolean,
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checkDescendants: {
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type: Boolean,
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default: false
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},
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// 展开子节点的时候是否自动展开父节点
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autoExpandParent: {
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type: Boolean,
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default: true
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},
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// 默认勾选的节点的 key 的数组
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defaultCheckedKeys: Array,
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// 默认展开的节点的 key 的数组
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defaultExpandedKeys: Array,
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// 是否展开当前节点的父节点
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expandCurrentNodeParent: Boolean,
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// 当前选中的节点
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currentNodeKey: [String, Number],
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// 是否最后一层叶子节点才显示单选/多选框
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checkOnlyLeaf: {
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type: Boolean,
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default: false
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},
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// 节点是否可被选择
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showCheckbox: {
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type: Boolean,
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default: false
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},
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// 节点单选
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showRadio: {
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type: Boolean,
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default: false
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},
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// 配置选项
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props: {
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type: [Object, Function],
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default () {
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return {
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children: 'children', // 指定子树为节点对象的某个属性值
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label: 'label', // 指定节点标签为节点对象的某个属性值
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disabled: 'disabled' // 指定节点选择框是否禁用为节点对象的某个属性值
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};
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}
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},
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// 是否懒加载子节点,需与 load 方法结合使用
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lazy: {
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type: Boolean,
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default: false
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},
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// 是否高亮当前选中节点,默认值是 false
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highlightCurrent: Boolean,
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// 加载子树数据的方法,仅当 lazy 属性为true 时生效
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load: Function,
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// 对树节点进行筛选时执行的方法,返回 true 表示这个节点可以显示,返回 false 则表示这个节点会被隐藏
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filterNodeMethod: Function,
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// 搜索时是否展示匹配项的所有子节点
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childVisibleForFilterNode: {
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type: Boolean,
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default: false
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},
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// 是否每次只打开一个同级树节点展开
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accordion: Boolean,
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// 相邻级节点间的水平缩进,单位为像素
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indent: {
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type: Number,
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default: 18
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},
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// 自定义树节点的展开图标
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iconClass: String,
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// 是否显示节点图标,如果配置为true,需要配置props中对应的图标属性名称
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showNodeIcon: {
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type: Boolean,
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default: false
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},
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// 当节点图标显示出错时,显示的默认图标
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defaultNodeIcon: {
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type: String,
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default: 'https://img-cdn-qiniu.dcloud.net.cn/uniapp/doc/github.svg'
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},
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// 如果数据量较大,建议不要在node节点中添加parent属性,会造成性能损耗
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isInjectParentInNode: {
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type: Boolean,
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default: false
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}
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},
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computed: {
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isEmpty() {
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if (this.store.root) {
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const childNodes = this.store.root.getChildNodes(this.childNodesId);
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return !childNodes || childNodes.length === 0 || childNodes.every(({visible}) => !visible);
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}
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return true;
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},
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showLoading() {
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return !(this.store.ready && this.ready);
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}
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},
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watch: {
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toggleExpendAll(newVal) {
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this.store.toggleExpendAll(newVal);
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},
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defaultCheckedKeys(newVal) {
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this.store.setDefaultCheckedKey(newVal);
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},
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defaultExpandedKeys(newVal) {
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this.store.defaultExpandedKeys = newVal;
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this.store.setDefaultExpandedKeys(newVal);
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},
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checkStrictly(newVal) {
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this.store.checkStrictly = newVal || this.checkOnlyLeaf;
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},
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'store.root.childNodesId'(newVal) {
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this.childNodesId = newVal;
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},
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'store.root.visible'(newVal) {
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this.visible = newVal;
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},
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childNodesId(){
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this.$nextTick(() => {
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this.$emit('ly-tree-render-completed');
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});
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},
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treeData: {
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handler(newVal) {
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this.updateKey = new Date().getTime();
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this.store.setData(newVal);
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},
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deep: true
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}
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},
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methods: {
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/*
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* @description 对树节点进行筛选操作
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* @method filter
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* @param {all} value 在 filter-node-method 中作为第一个参数
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* @param {Object} data 搜索指定节点的节点数据,不传代表搜索所有节点,假如要搜索A节点下面的数据,那么nodeData代表treeData中A节点的数据
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*/
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filter(value, data) {
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if (!this.filterNodeMethod) throw new Error('[Tree] filterNodeMethod is required when filter');
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this.store.filter(value, data);
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},
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/*
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* @description 获取节点的唯一标识符
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* @method getNodeKey
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* @param {String, Number} nodeId
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* @return {String, Number} 匹配到的数据中的某一项数据
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*/
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getNodeKey(nodeId) {
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let node = this.store.root.getChildNodes([nodeId])[0];
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return getNodeKey(this.nodeKey, node.data);
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},
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/*
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* @description 获取节点路径
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* @method getNodePath
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* @param {Object} data 节点数据
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* @return {Array} 路径数组
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*/
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getNodePath(data) {
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return this.store.getNodePath(data);
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},
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/*
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* @description 若节点可被选择(即 show-checkbox 为 true),则返回目前被选中的节点所组成的数组
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* @method getCheckedNodes
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* @param {Boolean} leafOnly 是否只是叶子节点,默认false
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* @param {Boolean} includeHalfChecked 是否包含半选节点,默认false
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* @return {Array} 目前被选中的节点所组成的数组
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*/
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getCheckedNodes(leafOnly, includeHalfChecked) {
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return this.store.getCheckedNodes(leafOnly, includeHalfChecked);
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},
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/*
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* @description 若节点可被选择(即 show-checkbox 为 true),则返回目前被选中的节点的 key 所组成的数组
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* @method getCheckedKeys
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* @param {Boolean} leafOnly 是否只是叶子节点,默认false,若为 true 则仅返回被选中的叶子节点的 keys
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* @param {Boolean} includeHalfChecked 是否返回indeterminate为true的节点,默认false
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* @return {Array} 目前被选中的节点所组成的数组
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*/
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getCheckedKeys(leafOnly, includeHalfChecked) {
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return this.store.getCheckedKeys(leafOnly, includeHalfChecked);
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},
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/*
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* @description 获取当前被选中节点的 data,若没有节点被选中则返回 null
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* @method getCurrentNode
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* @return {Object} 当前被选中节点的 data,若没有节点被选中则返回 null
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*/
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getCurrentNode() {
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const currentNode = this.store.getCurrentNode();
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return currentNode ? currentNode.data : null;
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},
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/*
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* @description 获取当前被选中节点的 key,若没有节点被选中则返回 null
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* @method getCurrentKey
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* @return {all} 当前被选中节点的 key, 若没有节点被选中则返回 null
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*/
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getCurrentKey() {
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const currentNode = this.getCurrentNode();
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return currentNode ? currentNode[this.nodeKey] : null;
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},
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/*
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* @description 设置全选/取消全选
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* @method setCheckAll
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* @param {Boolean} isCheckAll 选中状态,默认为true
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*/
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setCheckAll(isCheckAll = true) {
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if (this.showRadio) throw new Error('You set the "show-radio" property, so you cannot select all nodes');
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if (!this.showCheckbox) console.warn('You have not set the property "show-checkbox". Please check your settings');
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this.store.setCheckAll(isCheckAll);
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},
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/*
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* @description 设置目前勾选的节点
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* @method setCheckedNodes
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* @param {Array} nodes 接收勾选节点数据的数组
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* @param {Boolean} leafOnly 是否只是叶子节点, 若为 true 则仅设置叶子节点的选中状态,默认值为 false
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*/
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setCheckedNodes(nodes, leafOnly) {
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this.store.setCheckedNodes(nodes, leafOnly);
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},
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/*
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* @description 通过 keys 设置目前勾选的节点
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* @method setCheckedKeys
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* @param {Array} keys 勾选节点的 key 的数组
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* @param {Boolean} leafOnly 是否只是叶子节点, 若为 true 则仅设置叶子节点的选中状态,默认值为 false
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*/
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setCheckedKeys(keys, leafOnly) {
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if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in setCheckedKeys');
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this.store.setCheckedKeys(keys, leafOnly);
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},
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/*
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* @description 通过 key / data 设置某个节点的勾选状态
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* @method setChecked
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* @param {all} data 勾选节点的 key 或者 data
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* @param {Boolean} checked 节点是否选中
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* @param {Boolean} deep 是否设置子节点 ,默认为 false
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*/
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setChecked(data, checked, deep) {
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this.store.setChecked(data, checked, deep);
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},
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/*
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* @description 若节点可被选择(即 show-checkbox 为 true),则返回目前半选中的节点所组成的数组
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* @method getHalfCheckedNodes
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* @return {Array} 目前半选中的节点所组成的数组
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*/
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getHalfCheckedNodes() {
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return this.store.getHalfCheckedNodes();
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},
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/*
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* @description 若节点可被选择(即 show-checkbox 为 true),则返回目前半选中的节点的 key 所组成的数组
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* @method getHalfCheckedKeys
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* @return {Array} 目前半选中的节点的 key 所组成的数组
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*/
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getHalfCheckedKeys() {
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return this.store.getHalfCheckedKeys();
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},
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/*
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* @description 通过 node 设置某个节点的当前选中状态
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* @method setCurrentNode
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* @param {Object} node 待被选节点的 node
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*/
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setCurrentNode(node) {
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if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in setCurrentNode');
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this.store.setUserCurrentNode(node);
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},
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/*
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* @description 通过 key 设置某个节点的当前选中状态
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* @method setCurrentKey
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* @param {all} key 待被选节点的 key,若为 null 则取消当前高亮的节点
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*/
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setCurrentKey(key) {
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if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in setCurrentKey');
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this.store.setCurrentNodeKey(key);
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},
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/*
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* @description 根据 data 或者 key 拿到 Tree 组件中的 node
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* @method getNode
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* @param {all} data 要获得 node 的 key 或者 data
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*/
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getNode(data) {
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return this.store.getNode(data);
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},
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/*
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* @description 删除 Tree 中的一个节点
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* @method remove
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* @param {all} data 要删除的节点的 data 或者 node
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*/
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remove(data) {
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this.store.remove(data);
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},
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/*
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* @description 为 Tree 中的一个节点追加一个子节点
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* @method append
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* @param {Object} data 要追加的子节点的 data
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* @param {Object} parentNode 子节点的 parent 的 data、key 或者 node
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*/
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append(data, parentNode) {
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this.store.append(data, parentNode);
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},
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/*
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* @description 为 Tree 的一个节点的前面增加一个节点
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* @method insertBefore
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* @param {Object} data 要增加的节点的 data
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* @param {all} refNode 要增加的节点的后一个节点的 data、key 或者 node
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*/
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insertBefore(data, refNode) {
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this.store.insertBefore(data, refNode);
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},
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/*
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* @description 为 Tree 的一个节点的后面增加一个节点
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* @method insertAfter
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* @param {Object} data 要增加的节点的 data
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* @param {all} refNode 要增加的节点的前一个节点的 data、key 或者 node
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*/
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insertAfter(data, refNode) {
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this.store.insertAfter(data, refNode);
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},
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/*
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* @description 通过 keys 设置节点子元素
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* @method updateKeyChildren
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* @param {String, Number} key 节点 key
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* @param {Object} data 节点数据的数组
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*/
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updateKeyChildren(key, data) {
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if (!this.nodeKey) throw new Error('[Tree] nodeKey is required in updateKeyChild');
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this.store.updateChildren(key, data);
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}
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},
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created() {
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this.isTree = true;
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let props = this.props;
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if (typeof this.props === 'function') props = this.props();
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if (typeof props !== 'object') throw new Error('props must be of object type.');
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this.store = new TreeStore({
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key: this.nodeKey,
|
||
data: this.treeData,
|
||
lazy: this.lazy,
|
||
props: props,
|
||
load: this.load,
|
||
showCheckbox: this.showCheckbox,
|
||
showRadio: this.showRadio,
|
||
currentNodeKey: this.currentNodeKey,
|
||
checkStrictly: this.checkStrictly || this.checkOnlyLeaf,
|
||
checkDescendants: this.checkDescendants,
|
||
expandOnCheckNode: this.expandOnCheckNode,
|
||
defaultCheckedKeys: this.defaultCheckedKeys,
|
||
defaultExpandedKeys: this.defaultExpandedKeys,
|
||
expandCurrentNodeParent: this.expandCurrentNodeParent,
|
||
autoExpandParent: this.autoExpandParent,
|
||
defaultExpandAll: this.defaultExpandAll,
|
||
filterNodeMethod: this.filterNodeMethod,
|
||
childVisibleForFilterNode: this.childVisibleForFilterNode,
|
||
showNodeIcon: this.showNodeIcon,
|
||
isInjectParentInNode: this.isInjectParentInNode
|
||
});
|
||
|
||
this.childNodesId = this.store.root.childNodesId;
|
||
},
|
||
|
||
beforeDestroy() {
|
||
if (this.accordion) {
|
||
uni.$off(`${this.elId}-tree-node-expand`)
|
||
}
|
||
}
|
||
};
|
||
</script>
|
||
|
||
<style>
|
||
.ly-tree {
|
||
position: relative;
|
||
cursor: default;
|
||
background: #FFF;
|
||
color: #606266;
|
||
padding: 30rpx;
|
||
}
|
||
|
||
.ly-tree.is-empty {
|
||
background: transparent;
|
||
}
|
||
|
||
/* lyEmpty-start */
|
||
.ly-empty {
|
||
width: 100%;
|
||
display: flex;
|
||
justify-content: center;
|
||
margin-top: 100rpx;
|
||
}
|
||
/* lyEmpty-end */
|
||
|
||
/* lyLoader-start */
|
||
.ly-loader {
|
||
margin-top: 100rpx;
|
||
display: flex;
|
||
align-items: center;
|
||
justify-content: center;
|
||
}
|
||
|
||
.ly-loader-inner,
|
||
.ly-loader-inner:before,
|
||
.ly-loader-inner:after {
|
||
background: #efefef;
|
||
animation: load 1s infinite ease-in-out;
|
||
width: .5em;
|
||
height: 1em;
|
||
}
|
||
|
||
.ly-loader-inner:before,
|
||
.ly-loader-inner:after {
|
||
position: absolute;
|
||
top: 0;
|
||
content: '';
|
||
}
|
||
|
||
.ly-loader-inner:before {
|
||
left: -1em;
|
||
}
|
||
|
||
.ly-loader-inner {
|
||
text-indent: -9999em;
|
||
position: relative;
|
||
font-size: 22rpx;
|
||
animation-delay: 0.16s;
|
||
}
|
||
|
||
.ly-loader-inner:after {
|
||
left: 1em;
|
||
animation-delay: 0.32s;
|
||
}
|
||
/* lyLoader-end */
|
||
|
||
@keyframes load {
|
||
0%,
|
||
80%,
|
||
100% {
|
||
box-shadow: 0 0 #efefef;
|
||
height: 1em;
|
||
}
|
||
|
||
40% {
|
||
box-shadow: 0 -1.5em #efefef;
|
||
height: 1.5em;
|
||
}
|
||
}
|
||
</style>
|