<template>
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<div
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class="el-tree-node"
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@click.stop="handleClick"
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@contextmenu="($event) => this.handleContextMenu($event)"
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v-show="node.visible"
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:class="{
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'is-expanded': expanded,
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'is-current': node.isCurrent,
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'is-hidden': !node.visible,
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'is-focusable': !node.disabled,
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'is-checked': !node.disabled && node.checked
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}"
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role="treeitem"
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tabindex="-1"
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:aria-expanded="expanded"
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:aria-disabled="node.disabled"
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:aria-checked="node.checked"
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:draggable="tree.draggable"
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@dragstart.stop="handleDragStart"
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@dragover.stop="handleDragOver"
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@dragend.stop="handleDragEnd"
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@drop.stop="handleDrop"
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ref="node"
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>
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<div class="el-tree-node__content"
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:style="{ 'padding-left': (node.level - 1) * tree.indent + 'px' }">
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<span
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@click.stop="handleExpandIconClick"
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:class="[
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{ 'is-leaf': node.isLeaf, expanded: !node.isLeaf && expanded },
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'el-tree-node__expand-icon',
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tree.iconClass ? tree.iconClass : 'el-icon-caret-right'
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]"
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>
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</span>
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<el-checkbox
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v-if="showCheckbox"
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v-model="node.checked"
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:indeterminate="node.indeterminate"
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:disabled="!!node.disabled"
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@click.native.stop
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@change="handleCheckChange"
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>
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</el-checkbox>
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<span
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v-if="node.loading"
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class="el-tree-node__loading-icon el-icon-loading">
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</span>
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<node-content :node="node"></node-content>
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</div>
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<el-collapse-transition>
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<div
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class="el-tree-node__children"
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v-if="!renderAfterExpand || childNodeRendered"
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v-show="expanded"
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role="group"
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:aria-expanded="expanded"
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>
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<el-tree-node
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:render-content="renderContent"
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v-for="child in node.childNodes"
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:render-after-expand="renderAfterExpand"
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:show-checkbox="showCheckbox"
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:key="getNodeKey(child)"
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:node="child"
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@node-expand="handleChildNodeExpand">
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</el-tree-node>
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</div>
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</el-collapse-transition>
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</div>
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</template>
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<script type="text/jsx">
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import ElCollapseTransition from 'element-ui/src/transitions/collapse-transition';
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import ElCheckbox from 'element-ui/packages/checkbox';
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import emitter from 'element-ui/src/mixins/emitter';
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import { getNodeKey } from './model/util';
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export default {
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name: 'ElTreeNode',
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componentName: 'ElTreeNode',
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mixins: [emitter],
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props: {
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node: {
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default() {
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return {};
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}
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},
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props: {},
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renderContent: Function,
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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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showCheckbox: {
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type: Boolean,
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default: false
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}
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},
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components: {
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ElCollapseTransition,
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ElCheckbox,
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NodeContent: {
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props: {
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node: {
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required: true
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}
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},
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render(h) {
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const parent = this.$parent;
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const tree = parent.tree;
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const node = this.node;
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const { data, store } = node;
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return (
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parent.renderContent
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? parent.renderContent.call(parent._renderProxy, h, { _self: tree.$vnode.context, node, data, store })
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: tree.$scopedSlots.default
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? tree.$scopedSlots.default({ node, data })
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: <span class="el-tree-node__label">{ node.label }</span>
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);
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}
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}
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},
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data() {
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return {
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tree: null,
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expanded: false,
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childNodeRendered: false,
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oldChecked: null,
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oldIndeterminate: null
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};
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},
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watch: {
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'node.indeterminate'(val) {
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this.handleSelectChange(this.node.checked, val);
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},
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'node.checked'(val) {
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this.handleSelectChange(val, this.node.indeterminate);
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},
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'node.expanded'(val) {
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this.$nextTick(() => this.expanded = val);
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if (val) {
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this.childNodeRendered = true;
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}
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}
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},
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methods: {
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getNodeKey(node) {
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return getNodeKey(this.tree.nodeKey, node.data);
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},
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handleSelectChange(checked, indeterminate) {
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if (this.oldChecked !== checked && this.oldIndeterminate !== indeterminate) {
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this.tree.$emit('check-change', this.node.data, checked, indeterminate);
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}
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this.oldChecked = checked;
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this.indeterminate = indeterminate;
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},
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handleClick() {
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const store = this.tree.store;
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store.setCurrentNode(this.node);
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this.tree.$emit('current-change', store.currentNode ? store.currentNode.data : null, store.currentNode);
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this.tree.currentNode = this;
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if (this.tree.expandOnClickNode) {
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this.handleExpandIconClick();
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}
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if (this.tree.checkOnClickNode && !this.node.disabled) {
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this.handleCheckChange(null, {
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target: { checked: !this.node.checked }
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});
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}
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this.tree.$emit('node-click', this.node.data, this.node, this);
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},
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handleContextMenu(event) {
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if (this.tree._events['node-contextmenu'] && this.tree._events['node-contextmenu'].length > 0) {
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event.stopPropagation();
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event.preventDefault();
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}
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this.tree.$emit('node-contextmenu', event, this.node.data, this.node, this);
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},
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handleExpandIconClick() {
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if (this.node.isLeaf) return;
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if (this.expanded) {
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this.tree.$emit('node-collapse', this.node.data, this.node, this);
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this.node.collapse();
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} else {
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this.node.expand();
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this.$emit('node-expand', this.node.data, this.node, this);
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}
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},
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handleCheckChange(value, ev) {
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this.node.setChecked(ev.target.checked, !this.tree.checkStrictly);
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this.$nextTick(() => {
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const store = this.tree.store;
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this.tree.$emit('check', this.node.data, {
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checkedNodes: store.getCheckedNodes(),
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checkedKeys: store.getCheckedKeys(),
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halfCheckedNodes: store.getHalfCheckedNodes(),
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halfCheckedKeys: store.getHalfCheckedKeys(),
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});
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});
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},
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handleChildNodeExpand(nodeData, node, instance) {
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this.broadcast('ElTreeNode', 'tree-node-expand', node);
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this.tree.$emit('node-expand', nodeData, node, instance);
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},
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handleDragStart(event) {
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if (!this.tree.draggable) return;
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this.tree.$emit('tree-node-drag-start', event, this);
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},
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handleDragOver(event) {
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if (!this.tree.draggable) return;
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this.tree.$emit('tree-node-drag-over', event, this);
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event.preventDefault();
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},
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handleDrop(event) {
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event.preventDefault();
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},
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handleDragEnd(event) {
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if (!this.tree.draggable) return;
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this.tree.$emit('tree-node-drag-end', event, this);
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}
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},
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created() {
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const parent = this.$parent;
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if (parent.isTree) {
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this.tree = parent;
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} else {
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this.tree = parent.tree;
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}
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const tree = this.tree;
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if (!tree) {
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console.warn('Can not find node\'s tree.');
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}
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const props = tree.props || {};
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const childrenKey = props['children'] || 'children';
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this.$watch(`node.data.${childrenKey}`, () => {
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this.node.updateChildren();
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});
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if (this.node.expanded) {
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this.expanded = true;
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this.childNodeRendered = true;
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}
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if(this.tree.accordion) {
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this.$on('tree-node-expand', node => {
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if(this.node !== node) {
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this.node.collapse();
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}
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});
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}
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}
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};
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</script>
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