364 lines
10 KiB
JavaScript
364 lines
10 KiB
JavaScript
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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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// 时间轴
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class Timeline 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.computedLeftTopValue()
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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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// 时间轴2类型需要交替显示
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if (this.layout === CONSTANTS.LAYOUT.TIMELINE2) {
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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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// 节点生长方向
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newNode.dir =
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index % 2 === 0
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? CONSTANTS.LAYOUT_GROW_DIR.BOTTOM
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: CONSTANTS.LAYOUT_GROW_DIR.TOP
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}
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} else {
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newNode.dir = ''
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}
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if (parent._node.isRoot) {
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newNode.top =
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parent._node.top +
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(cur._node.height > parent._node.height
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? -(cur._node.height - parent._node.height) / 2
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: (parent._node.height - cur._node.height) / 2)
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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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null,
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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left、top
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computedLeftTopValue() {
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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 marginX = this.getMarginX(layerIndex + 1)
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let marginY = this.getMarginY(layerIndex + 1)
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if (isRoot) {
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let left = node.left + node.width
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let totalLeft = left + marginX
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node.children.forEach(cur => {
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cur.left = totalLeft
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totalLeft += cur.width + marginX
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})
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} else {
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let totalTop =
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node.top +
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node.height +
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marginY +
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(this.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0)
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node.children.forEach(cur => {
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cur.left = node.left + node.width * 0.5
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cur.top = totalTop
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totalTop +=
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cur.height +
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marginY +
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(this.getNodeActChildrenLength(cur) > 0 ? cur.expandBtnSize : 0)
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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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// 调整left
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if (node.isRoot) {
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this.updateBrothersLeft(node)
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}
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// 调整top
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let len = node.children.length
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if (parent && !parent.isRoot && len > 0) {
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let marginY = this.getMarginY(layerIndex + 1)
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let totalHeight =
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node.children.reduce((h, item) => {
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return (
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h +
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item.height +
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(this.getNodeActChildrenLength(item) > 0
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? item.expandBtnSize
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: 0)
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)
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}, 0) +
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len * marginY
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this.updateBrothersTop(node, totalHeight)
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}
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},
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(node, parent, isRoot, layerIndex) => {
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if (
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parent &&
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parent.isRoot &&
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node.dir === CONSTANTS.LAYOUT_GROW_DIR.TOP
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) {
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// 遍历二级节点的子节点
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node.children.forEach(item => {
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let totalHeight = this.getNodeAreaHeight(item)
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let _top = item.top
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item.top =
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node.top - (item.top - node.top) - totalHeight + node.height
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this.updateChildren(item.children, 'top', item.top - _top)
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})
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}
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},
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true
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)
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}
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// 递归计算节点的宽度
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getNodeAreaHeight(node) {
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let totalHeight = 0
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let loop = node => {
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totalHeight +=
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node.height +
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(this.getNodeActChildrenLength(node) > 0 ? node.expandBtnSize : 0) +
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this.getMarginY(node.layerIndex)
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if (node.children.length) {
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node.children.forEach(item => {
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loop(item)
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})
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}
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}
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loop(node)
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return totalHeight
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}
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// 调整兄弟节点的left
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updateBrothersLeft(node) {
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let childrenList = node.children
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let totalAddWidth = 0
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childrenList.forEach(item => {
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item.left += totalAddWidth
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if (item.children && item.children.length) {
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this.updateChildren(item.children, 'left', totalAddWidth)
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}
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// let areaWidth = this.getNodeAreaWidth(item)
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let { left, right } = this.getNodeBoundaries(item, 'h')
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let areaWidth = right - left
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let difference = areaWidth - item.width
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if (difference > 0) {
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totalAddWidth += difference
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}
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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) {
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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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let len = node.children.length
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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 x1 = prevBother.left + prevBother.width
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let x2 = item.left
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let y = node.top + node.height / 2
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let path = `M ${x1},${y} L ${x2},${y}`
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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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let maxy = -Infinity
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let miny = Infinity
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let x = node.left + node.width * 0.3
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node.children.forEach((item, index) => {
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let y = item.top + item.height / 2
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if (y > maxy) {
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maxy = y
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}
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if (y < miny) {
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miny = y
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}
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// 水平线
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let path = `M ${x},${y} L ${item.left},${y}`
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this.setLineStyle(style, lines[index], path, item)
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})
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// 竖线
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if (len > 0) {
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let line = this.lineDraw.path()
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expandBtnSize = len > 0 ? expandBtnSize : 0
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if (
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node.parent &&
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node.parent.isRoot &&
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node.dir === CONSTANTS.LAYOUT_GROW_DIR.TOP
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) {
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line.plot(this.transformPath(`M ${x},${top} L ${x},${miny}`))
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} else {
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line.plot(
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this.transformPath(
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`M ${x},${top + height + expandBtnSize} L ${x},${maxy}`
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)
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)
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}
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node.style.line(line)
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node._lines.push(line)
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style && style(line, node)
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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 (
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node.parent &&
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node.parent.isRoot &&
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node.dir === CONSTANTS.LAYOUT_GROW_DIR.TOP
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) {
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btn.translate(
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width * 0.3 - expandBtnSize / 2 - translateX,
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-expandBtnSize / 2 - translateY
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)
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} else {
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btn.translate(
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width * 0.3 - expandBtnSize / 2 - translateX,
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height + expandBtnSize / 2 - translateY
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)
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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 {
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top,
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bottom,
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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 x1 = right + generalizationLineMargin
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let y1 = top
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let x2 = right + generalizationLineMargin
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let y2 = bottom
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let cx = x1 + 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 = right + generalizationNodeMargin
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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 (this.layout === CONSTANTS.LAYOUT.TIMELINE) {
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rect.size(width, expandBtnSize).x(0).y(height)
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} else {
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let dir = ''
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if (node.dir === CONSTANTS.LAYOUT_GROW_DIR.TOP) {
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dir =
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node.layerIndex === 1
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? CONSTANTS.LAYOUT_GROW_DIR.TOP
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: CONSTANTS.LAYOUT_GROW_DIR.BOTTOM
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} else {
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dir = CONSTANTS.LAYOUT_GROW_DIR.BOTTOM
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}
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if (dir === CONSTANTS.LAYOUT_GROW_DIR.TOP) {
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rect.size(width, expandBtnSize).x(0).y(-expandBtnSize)
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} else {
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rect.size(width, expandBtnSize).x(0).y(height)
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}
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}
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}
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}
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export default Timeline
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