425 lines
13 KiB
JavaScript
425 lines
13 KiB
JavaScript
import Base from './Base'
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import { walk, asyncRun, getNodeIndexInNodeList } from '../utils'
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import { CONSTANTS } from '../constants/constant'
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// 竖向时间轴
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class VerticalTimeline extends Base {
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// 构造函数
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constructor(opt = {}, layout) {
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super(opt)
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this.layout = layout
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}
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// 布局
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doLayout(callback) {
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let task = [
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() => {
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this.computedBaseValue()
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},
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() => {
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this.computedTopValue()
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},
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() => {
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this.adjustLeftTopValue()
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},
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() => {
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callback(this.root)
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}
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]
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asyncRun(task)
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}
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// 遍历数据创建节点、计算根节点的位置，计算根节点的子节点的top值
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computedBaseValue() {
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walk(
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this.renderer.renderTree,
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null,
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(cur, parent, isRoot, layerIndex, index, ancestors) => {
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let newNode = this.createNode(cur, parent, isRoot, layerIndex, index, ancestors)
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// 根节点定位在画布中心位置
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if (isRoot) {
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this.setNodeCenter(newNode)
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} else {
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// 非根节点
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// 节点生长方向
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// 三级及以下节点以上级为准
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if (parent._node.dir) {
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newNode.dir = parent._node.dir
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} else {
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newNode.dir =
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index % 2 === 0
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? CONSTANTS.LAYOUT_GROW_DIR.RIGHT
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: CONSTANTS.LAYOUT_GROW_DIR.LEFT
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}
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// 定位二级节点的left
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if (parent._node.isRoot) {
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newNode.left =
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parent._node.left +
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(cur._node.width > parent._node.width
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? -(cur._node.width - parent._node.width) / 2
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: (parent._node.width - cur._node.width) / 2)
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} else {
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newNode.left =
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newNode.dir === CONSTANTS.LAYOUT_GROW_DIR.RIGHT
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? parent._node.left +
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parent._node.width +
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this.getMarginX(layerIndex)
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: parent._node.left -
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this.getMarginX(layerIndex) -
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newNode.width
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}
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}
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if (!cur.data.expand) {
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return true
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}
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},
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(cur, parent, isRoot, layerIndex) => {
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// 返回时计算节点的areaHeight，也就是子节点所占的高度之和，包括外边距
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if (isRoot) {
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return
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}
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let len = cur.data.expand === false ? 0 : cur._node.children.length
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cur._node.childrenAreaHeight = len
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? cur._node.children.reduce((h, item) => {
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return h + item.height
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}, 0) +
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(len + 1) * this.getMarginY(layerIndex + 1)
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: 0
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},
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true,
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0
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)
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}
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// 遍历节点树计算节点的top
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computedTopValue() {
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walk(
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this.root,
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null,
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(node, parent, isRoot, layerIndex, index) => {
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if (node.getData('expand') && node.children && node.children.length) {
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let marginY = this.getMarginY(layerIndex + 1)
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// 定位二级节点的top
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if (isRoot) {
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let top = node.top + node.height
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let totalTop = top + marginY
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node.children.forEach(cur => {
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cur.top = totalTop
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totalTop += cur.height + marginY
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})
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} else {
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// 定位三级及以下节点的top
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let marginY = this.getMarginY(layerIndex + 1)
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let baseTop = node.top + node.height / 2 + marginY
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// 第一个子节点的top值 = 该节点中心的top值 - 子节点的高度之和的一半
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let totalTop = baseTop - node.childrenAreaHeight / 2
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node.children.forEach(cur => {
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cur.top = totalTop
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totalTop += cur.height + marginY
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})
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}
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}
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},
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null,
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true
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)
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}
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// 调整节点left、top
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adjustLeftTopValue() {
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walk(
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this.root,
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null,
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(node, parent, isRoot, layerIndex) => {
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if (!node.getData('expand')) {
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return
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}
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if (isRoot) return
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// 判断子节点所占的高度之和是否大于该节点自身，大于则需要调整位置
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let base = this.getMarginY(layerIndex + 1) * 2 + node.height
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let difference = node.childrenAreaHeight - base
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if (difference > 0) {
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this.updateBrothers(node, difference / 2)
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}
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},
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null,
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true
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)
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}
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// 更新兄弟节点的top
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updateBrothers(node, addHeight) {
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if (node.parent) {
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let childrenList = node.parent.children
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let index = getNodeIndexInNodeList(node, childrenList)
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childrenList.forEach((item, _index) => {
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// 自定义节点位置
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if (item.hasCustomPosition()) return
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// 三级或三级以下节点自身位置不需要动
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if (!node.parent.isRoot && item.uid === node.uid) return
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let _offset = 0
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// 二级节点上面的兄弟节点不需要移动，自身需要往下移动
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if (node.parent.isRoot) {
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// 上面的节点不用移
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if (_index < index) {
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_offset = 0
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} else if (_index > index) {
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// 下面的节点往下移
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_offset = addHeight * 2
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} else {
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// 自身也要移动
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_offset = addHeight
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}
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} else {
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// 三级或三级以下节点两侧的兄弟节点向两侧移动
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// 上面的节点往上移
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if (_index < index) {
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_offset = -addHeight
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} else if (_index > index) {
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// 下面的节点往下移
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_offset = addHeight
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}
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}
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item.top += _offset
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// 同步更新子节点的位置
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if (item.children && item.children.length) {
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this.updateChildren(item.children, 'top', _offset)
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}
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})
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// 更新父节点的位置
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this.updateBrothers(node.parent, addHeight)
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}
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}
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// 调整兄弟节点的top
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updateBrothersTop(node, addHeight) {
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if (node.parent && !node.parent.isRoot) {
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let childrenList = node.parent.children
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let index = getNodeIndexInNodeList(node, childrenList)
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childrenList.forEach((item, _index) => {
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if (item.hasCustomPosition()) {
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// 适配自定义位置
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return
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}
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let _offset = 0
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// 下面的节点往下移
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if (_index > index) {
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_offset = addHeight
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}
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item.top += _offset
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// 同步更新子节点的位置
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if (item.children && item.children.length) {
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this.updateChildren(item.children, 'top', _offset)
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}
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})
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// 更新父节点的位置
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this.updateBrothersTop(node.parent, addHeight)
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}
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}
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// 绘制连线，连接该节点到其子节点
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renderLine(node, lines, style, lineStyle) {
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if (lineStyle === 'curve') {
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this.renderLineCurve(node, lines, style)
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} else if (lineStyle === 'direct') {
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this.renderLineDirect(node, lines, style)
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} else {
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this.renderLineStraight(node, lines, style)
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}
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}
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// 直线连接
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renderLineStraight(node, lines, style) {
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if (node.children.length <= 0) {
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return []
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}
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let { expandBtnSize } = node
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const { alwaysShowExpandBtn, notShowExpandBtn } = this.mindMap.opt
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if (!alwaysShowExpandBtn || notShowExpandBtn) {
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expandBtnSize = 0
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}
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if (node.isRoot) {
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// 当前节点是根节点
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let prevBother = node
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// 根节点的子节点是和根节点同一水平线排列
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node.children.forEach((item, index) => {
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let y1 = prevBother.top + prevBother.height
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let y2 = item.top
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let x = node.left + node.width / 2
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let path = `M ${x},${y1} L ${x},${y2}`
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this.setLineStyle(style, lines[index], path, item)
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prevBother = item
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})
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} else {
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// 当前节点为非根节点
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if (node.dir === CONSTANTS.LAYOUT_GROW_DIR.RIGHT) {
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let nodeRight = node.left + node.width
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let nodeYCenter = node.top + node.height / 2
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let marginX = this.getMarginX(node.layerIndex + 1)
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let offset = (marginX - expandBtnSize) * 0.6
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node.children.forEach((item, index) => {
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let itemLeft = item.left
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let itemYCenter = item.top + item.height / 2
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let path = this.createFoldLine([
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[nodeRight, nodeYCenter],
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[nodeRight + offset, nodeYCenter],
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[nodeRight + offset, itemYCenter],
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[itemLeft, itemYCenter]
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])
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this.setLineStyle(style, lines[index], path, item)
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})
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} else {
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let nodeLeft = node.left
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let nodeYCenter = node.top + node.height / 2
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let marginX = this.getMarginX(node.layerIndex + 1)
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let offset = (marginX - expandBtnSize) * 0.6
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node.children.forEach((item, index) => {
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let itemRight = item.left + item.width
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let itemYCenter = item.top + item.height / 2
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let path = this.createFoldLine([
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[nodeLeft, nodeYCenter],
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[nodeLeft - offset, nodeYCenter],
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[nodeLeft - offset, itemYCenter],
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[itemRight, itemYCenter]
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])
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this.setLineStyle(style, lines[index], path, item)
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})
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}
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}
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}
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// 直连
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renderLineDirect(node, lines, style) {
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if (node.children.length <= 0) {
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return []
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}
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let { left, top, width, height, expandBtnSize } = node
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const { alwaysShowExpandBtn, notShowExpandBtn } = this.mindMap.opt
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if (!alwaysShowExpandBtn || notShowExpandBtn) {
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expandBtnSize = 0
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}
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node.children.forEach((item, index) => {
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if (node.isRoot) {
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let prevBother = node
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// 根节点的子节点是和根节点同一水平线排列
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node.children.forEach((item, index) => {
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let y1 = prevBother.top + prevBother.height
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let y2 = item.top
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let x = node.left + node.width / 2
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let path = `M ${x},${y1} L ${x},${y2}`
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this.setLineStyle(style, lines[index], path, item)
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prevBother = item
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})
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} else {
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let x1 =
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item.dir === CONSTANTS.LAYOUT_GROW_DIR.LEFT
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? left - expandBtnSize
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: left + width + expandBtnSize
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let y1 = top + height / 2
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let x2 =
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item.dir === CONSTANTS.LAYOUT_GROW_DIR.LEFT
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? item.left + item.width
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: item.left
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let y2 = item.top + item.height / 2
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let path = `M ${x1},${y1} L ${x2},${y2}`
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this.setLineStyle(style, lines[index], path, item)
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}
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})
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}
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// 曲线风格连线
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renderLineCurve(node, lines, style) {
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if (node.children.length <= 0) {
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return []
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}
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let { left, top, width, height, expandBtnSize } = node
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const { alwaysShowExpandBtn, notShowExpandBtn } = this.mindMap.opt
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if (!alwaysShowExpandBtn || notShowExpandBtn) {
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expandBtnSize = 0
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}
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node.children.forEach((item, index) => {
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if (node.isRoot) {
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let prevBother = node
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// 根节点的子节点是和根节点同一水平线排列
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node.children.forEach((item, index) => {
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let y1 = prevBother.top + prevBother.height
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let y2 = item.top
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let x = node.left + node.width / 2
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let path = `M ${x},${y1} L ${x},${y2}`
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this.setLineStyle(style, lines[index], path, item)
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prevBother = item
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})
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} else {
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let x1 =
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item.dir === CONSTANTS.LAYOUT_GROW_DIR.LEFT
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? left - expandBtnSize
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: left + width + expandBtnSize
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let y1 = top + height / 2
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let x2 =
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item.dir === CONSTANTS.LAYOUT_GROW_DIR.LEFT
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? item.left + item.width
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: item.left
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let y2 = item.top + item.height / 2
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let path = this.cubicBezierPath(x1, y1, x2, y2)
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this.setLineStyle(style, lines[index], path, item)
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}
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})
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}
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// 渲染按钮
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renderExpandBtn(node, btn) {
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let { width, height, expandBtnSize, isRoot } = node
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if (!isRoot) {
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let { translateX, translateY } = btn.transform()
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if (node.dir === CONSTANTS.LAYOUT_GROW_DIR.RIGHT) {
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btn.translate(width - translateX, height / 2 - translateY)
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} else {
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btn.translate(-expandBtnSize - translateX, height / 2 - translateY)
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}
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}
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}
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// 创建概要节点
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renderGeneralization(list) {
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list.forEach(item => {
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let isLeft = item.node.dir === CONSTANTS.LAYOUT_GROW_DIR.LEFT
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let {
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top,
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bottom,
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left,
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right,
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generalizationLineMargin,
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generalizationNodeMargin
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} = this.getNodeGeneralizationRenderBoundaries(item, 'h')
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let x = isLeft
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? left - generalizationLineMargin
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: right + generalizationLineMargin
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let x1 = x
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let y1 = top
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let x2 = x
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let y2 = bottom
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let cx = x1 + (isLeft ? -20 : 20)
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let cy = y1 + (y2 - y1) / 2
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let path = `M ${x1},${y1} Q ${cx},${cy} ${x2},${y2}`
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item.generalizationLine.plot(this.transformPath(path))
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item.generalizationNode.left =
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x +
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(isLeft ? -generalizationNodeMargin : generalizationNodeMargin) -
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(isLeft ? item.generalizationNode.width : 0)
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item.generalizationNode.top =
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top + (bottom - top - item.generalizationNode.height) / 2
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})
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}
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// 渲染展开收起按钮的隐藏占位元素
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renderExpandBtnRect(rect, expandBtnSize, width, height, node) {
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if (node.dir === CONSTANTS.LAYOUT_GROW_DIR.LEFT) {
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rect.size(expandBtnSize, height).x(-expandBtnSize).y(0)
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} else {
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rect.size(expandBtnSize, height).x(width).y(0)
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}
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}
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}
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export default VerticalTimeline
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