mirror of
https://github.com/wanglin2/mind-map.git
synced 2026-02-22 02:47:46 +08:00
720 lines
21 KiB
JavaScript
720 lines
21 KiB
JavaScript
import {
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bfsWalk,
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throttle,
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getTopAncestorsFomNodeList,
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getNodeIndexInNodeList
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} from '../utils'
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import Base from '../layouts/Base'
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// 节点拖动插件
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class Drag extends Base {
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// 构造函数
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constructor({ mindMap }) {
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super(mindMap.renderer)
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this.mindMap = mindMap
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this.reset()
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this.bindEvent()
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}
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// 复位
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reset() {
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// 是否正在跳转中
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this.isDragging = false
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// 鼠标按下的节点
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this.mousedownNode = null
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// 被拖拽中的节点列表
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this.beingDragNodeList = []
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// 当前画布节点列表
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this.nodeList = []
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// 当前重叠节点
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this.overlapNode = null
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// 当前上一个同级节点
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this.prevNode = null
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// 当前下一个同级节点
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this.nextNode = null
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// 画布的变换数据
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this.drawTransform = null
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// 克隆节点
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this.clone = null
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// 同级位置占位符
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this.placeholder = null
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// 鼠标按下位置和节点左上角的偏移量
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this.offsetX = 0
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this.offsetY = 0
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// 当前鼠标是否按下
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this.isMousedown = false
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// 拖拽的鼠标位置变量
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this.mouseDownX = 0
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this.mouseDownY = 0
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this.mouseMoveX = 0
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this.mouseMoveY = 0
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// 鼠标移动的距离距鼠标按下的位置距离多少以上才认为是拖动事件
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this.checkDragOffset = 10
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this.minOffset = 10
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}
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// 绑定事件
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bindEvent() {
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this.onNodeMousedown = this.onNodeMousedown.bind(this)
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this.onMousemove = this.onMousemove.bind(this)
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this.onMouseup = this.onMouseup.bind(this)
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this.checkOverlapNode = throttle(this.checkOverlapNode, 300, this)
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this.mindMap.on('node_mousedown', this.onNodeMousedown)
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this.mindMap.on('mousemove', this.onMousemove)
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this.mindMap.on('node_mouseup', this.onMouseup)
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this.mindMap.on('mouseup', this.onMouseup)
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}
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// 解绑事件
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unBindEvent() {
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this.mindMap.off('node_mousedown', this.onNodeMousedown)
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this.mindMap.off('mousemove', this.onMousemove)
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this.mindMap.off('node_mouseup', this.onMouseup)
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this.mindMap.off('mouseup', this.onMouseup)
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}
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// 节点鼠标按下事件
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onNodeMousedown(node, e) {
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// 只读模式、不是鼠标左键按下、按下的是概要节点或根节点直接返回
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if (
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this.mindMap.opt.readonly ||
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e.which !== 1 ||
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node.isGeneralization ||
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node.isRoot
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) {
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return
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}
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e.preventDefault()
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this.isMousedown = true
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// 记录鼠标按下时的节点
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this.mousedownNode = node
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// 记录鼠标按下的坐标
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const { x, y } = this.mindMap.toPos(e.clientX, e.clientY)
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this.mouseDownX = x
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this.mouseDownY = y
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}
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// 鼠标移动事件
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onMousemove(e) {
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if (this.mindMap.opt.readonly || !this.isMousedown) {
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return
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}
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e.preventDefault()
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const { x, y } = this.mindMap.toPos(e.clientX, e.clientY)
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this.mouseMoveX = x
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this.mouseMoveY = y
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// 还没开始移动时鼠标位移过小不认为是拖拽
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if (
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!this.isDragging &&
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Math.abs(x - this.mouseDownX) <= this.checkDragOffset &&
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Math.abs(y - this.mouseDownY) <= this.checkDragOffset
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) {
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return
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}
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this.mindMap.emit('node_dragging', this.mousedownNode)
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this.handleStartMove()
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this.onMove(x, y, e)
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}
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// 鼠标松开事件
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onMouseup(e) {
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if (!this.isMousedown) {
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return
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}
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this.isMousedown = false
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// 恢复被拖拽节点的临时设置
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this.beingDragNodeList.forEach(node => {
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node.setOpacity(1)
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node.showChildren()
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node.endDrag()
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})
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this.removeCloneNode()
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let overlapNodeUid = this.overlapNode ? this.overlapNode.getData('uid') : ''
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let prevNodeUid = this.prevNode ? this.prevNode.getData('uid') : ''
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let nextNodeUid = this.nextNode ? this.nextNode.getData('uid') : ''
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// 存在重叠子节点，则移动作为其子节点
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if (this.overlapNode) {
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this.mindMap.execCommand('SET_NODE_ACTIVE', this.overlapNode, false)
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this.mindMap.execCommand(
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'MOVE_NODE_TO',
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this.beingDragNodeList,
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this.overlapNode
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)
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} else if (this.prevNode) {
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// 存在前一个相邻节点，作为其下一个兄弟节点
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this.mindMap.execCommand('SET_NODE_ACTIVE', this.prevNode, false)
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this.mindMap.execCommand(
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'INSERT_AFTER',
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this.beingDragNodeList,
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this.prevNode
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)
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} else if (this.nextNode) {
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// 存在下一个相邻节点，作为其前一个兄弟节点
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this.mindMap.execCommand('SET_NODE_ACTIVE', this.nextNode, false)
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this.mindMap.execCommand(
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'INSERT_BEFORE',
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this.beingDragNodeList,
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this.nextNode
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)
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} else if (
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this.clone &&
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this.mindMap.opt.enableFreeDrag &&
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this.beingDragNodeList.length === 1
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) {
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// 如果只拖拽了一个节点，那么设置自定义位置
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let { x, y } = this.mindMap.toPos(
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e.clientX - this.offsetX,
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e.clientY - this.offsetY
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)
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let { scaleX, scaleY, translateX, translateY } = this.drawTransform
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x = (x - translateX) / scaleX
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y = (y - translateY) / scaleY
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this.mousedownNode.left = x
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this.mousedownNode.top = y
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this.mousedownNode.customLeft = x
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this.mousedownNode.customTop = y
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this.mindMap.execCommand(
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'SET_NODE_CUSTOM_POSITION',
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this.mousedownNode,
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x,
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y
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)
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this.mindMap.render()
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}
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if (this.isDragging) {
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this.mindMap.emit('node_dragend', {
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overlapNodeUid,
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prevNodeUid,
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nextNodeUid
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})
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}
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this.reset()
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}
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// 拖动中
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onMove(x, y, e) {
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if (!this.isMousedown) {
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return
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}
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// 更新克隆节点的位置
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let { scaleX, scaleY, translateX, translateY } = this.drawTransform
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let cloneNodeLeft = x - this.offsetX
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let cloneNodeTop = y - this.offsetY
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x = (cloneNodeLeft - translateX) / scaleX
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y = (cloneNodeTop - translateY) / scaleY
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let t = this.clone.transform()
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this.clone.translate(x - t.translateX, y - t.translateY)
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// 检测新位置
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this.checkOverlapNode()
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// 如果注册了多选节点插件，那么复用它的边缘自动移动画布功能
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if (this.mindMap.opt.autoMoveWhenMouseInEdgeOnDrag && this.mindMap.select) {
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this.drawTransform = this.mindMap.draw.transform()
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this.mindMap.select.clearAutoMoveTimer()
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this.mindMap.select.onMove(e.clientX, e.clientY)
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}
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}
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// 开始拖拽时初始化一些数据
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handleStartMove() {
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if (!this.isDragging) {
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this.isDragging = true
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// 鼠标按下的节点
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let node = this.mousedownNode
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// 计算鼠标按下的位置距离节点左上角的距离
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this.drawTransform = this.mindMap.draw.transform()
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let { scaleX, scaleY, translateX, translateY } = this.drawTransform
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this.offsetX = this.mouseDownX - (node.left * scaleX + translateX)
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this.offsetY = this.mouseDownY - (node.top * scaleY + translateY)
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// 如果鼠标按下的节点是激活节点，那么保存当前所有激活的节点
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if (node.getData('isActive')) {
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// 找出这些激活节点中的最顶层节点
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this.beingDragNodeList = getTopAncestorsFomNodeList(
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// 过滤掉根节点和概要节点
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this.mindMap.renderer.activeNodeList.filter(item => {
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return !item.isRoot && !item.isGeneralization
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})
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)
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} else {
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// 否则只拖拽按下的节点
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this.beingDragNodeList = [node]
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}
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// 将节点树转为节点数组
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this.nodeTreeToList()
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// 创建克隆节点
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this.createCloneNode()
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// 清除当前所有激活的节点
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this.mindMap.execCommand('CLEAR_ACTIVE_NODE')
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}
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}
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// 节点由树转换成数组，从子节点到根节点
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nodeTreeToList() {
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const list = []
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bfsWalk(this.mindMap.renderer.root, node => {
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// 过滤掉当前被拖拽的节点
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if (this.checkIsInBeingDragNodeList(node)) {
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return
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}
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if (!list[node.layerIndex]) {
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list[node.layerIndex] = []
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}
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list[node.layerIndex].push(node)
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})
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this.nodeList = list.reduceRight((res, cur) => {
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return [...res, ...cur]
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}, [])
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}
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// 创建克隆节点
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createCloneNode() {
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if (!this.clone) {
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const {
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dragMultiNodeRectConfig,
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dragPlaceholderRectFill,
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dragOpacityConfig
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} = this.mindMap.opt
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const {
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width: rectWidth,
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height: rectHeight,
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fill: rectFill
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} = dragMultiNodeRectConfig
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const node = this.beingDragNodeList[0]
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const lineColor = node.style.merge('lineColor', true)
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// 如果当前被拖拽的节点数量大于1，那么创建一个矩形示意
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if (this.beingDragNodeList.length > 1) {
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this.clone = this.mindMap.otherDraw
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.rect()
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.size(rectWidth, rectHeight)
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.radius(rectHeight / 2)
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.fill({
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color: rectFill || lineColor
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})
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this.offsetX = rectWidth / 2
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this.offsetY = rectHeight / 2
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} else {
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// 否则克隆当前的节点
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this.clone = node.group.clone()
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// 删除展开收起按钮元素
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const expandEl = this.clone.findOne('.smm-expand-btn')
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if (expandEl) {
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expandEl.remove()
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}
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this.mindMap.otherDraw.add(this.clone)
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}
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this.clone.opacity(dragOpacityConfig.cloneNodeOpacity)
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this.clone.css('z-index', 99999)
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// 同级位置提示元素
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this.placeholder = this.mindMap.otherDraw.rect().fill({
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color: dragPlaceholderRectFill || lineColor
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})
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// 当前被拖拽的节点的临时设置
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this.beingDragNodeList.forEach(node => {
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// 降低透明度
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node.setOpacity(dragOpacityConfig.beingDragNodeOpacity)
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// 隐藏连线及下级节点
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node.hideChildren()
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// 设置拖拽状态
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node.startDrag()
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})
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}
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}
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// 移除克隆节点
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removeCloneNode() {
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if (!this.clone) {
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return
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}
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this.clone.remove()
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this.placeholder.remove()
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}
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// 检测重叠节点
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checkOverlapNode() {
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if (!this.drawTransform || !this.placeholder) {
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return
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}
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this.overlapNode = null
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this.prevNode = null
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this.nextNode = null
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this.placeholder.size(0, 0)
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this.nodeList.forEach(node => {
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if (node.getData('isActive')) {
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this.mindMap.execCommand('SET_NODE_ACTIVE', node, false)
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}
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if (this.overlapNode || (this.prevNode && this.nextNode)) {
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return
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}
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switch (this.mindMap.opt.layout) {
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case 'logicalStructure':
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this.handleLogicalStructure(node)
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break
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case 'mindMap':
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this.handleMindMap(node)
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break
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case 'organizationStructure':
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this.handleOrganizationStructure(node)
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break
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case 'catalogOrganization':
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this.handleCatalogOrganization(node)
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break
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case 'timeline':
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this.handleTimeLine(node)
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break
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case 'timeline2':
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this.handleTimeLine2(node)
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break
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case 'verticalTimeline':
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this.handleLogicalStructure(node)
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break
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case 'fishbone':
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this.handleFishbone(node)
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break
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default:
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this.handleLogicalStructure(node)
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}
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})
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if (this.overlapNode) {
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this.mindMap.execCommand('SET_NODE_ACTIVE', this.overlapNode, true)
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}
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}
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// 垂直方向比较
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// isReverse：是否反向
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handleVerticalCheck(node, checkList, isReverse = false) {
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let x = this.mouseMoveX
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let y = this.mouseMoveY
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let nodeRect = this.getNodeRect(node)
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if (isReverse) {
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checkList = checkList.reverse()
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}
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let oneFourthHeight = nodeRect.height / 4
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let { prevBrotherOffset, nextBrotherOffset } =
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this.getNodeDistanceToSiblingNode(checkList, node, nodeRect, 'v')
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if (nodeRect.left <= x && nodeRect.right >= x) {
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// 检测兄弟节点位置
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if (
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!this.overlapNode &&
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!this.prevNode &&
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!this.nextNode &&
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!node.isRoot
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) {
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let checkIsPrevNode =
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nextBrotherOffset > 0 // 距离下一个兄弟节点的距离大于0
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? y > nodeRect.bottom && y <= nodeRect.bottom + nextBrotherOffset // 那么在当前节点外底部判断
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: y >= nodeRect.bottom - oneFourthHeight && y <= nodeRect.bottom // 否则在当前节点内底部1/4区间判断
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let checkIsNextNode =
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prevBrotherOffset > 0 // 距离上一个兄弟节点的距离大于0
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? y < nodeRect.top && y >= nodeRect.top - prevBrotherOffset // 那么在当前节点外底部判断
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: y >= nodeRect.top && y <= nodeRect.top + oneFourthHeight
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if (checkIsPrevNode) {
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if (isReverse) {
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this.nextNode = node
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} else {
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this.prevNode = node
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}
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let size = this.formatPlaceholderSize(nextBrotherOffset)
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this.setPlaceholderRect(
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node.width,
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size,
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nodeRect.originLeft,
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nodeRect.originBottom
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)
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} else if (checkIsNextNode) {
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if (isReverse) {
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this.prevNode = node
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} else {
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this.nextNode = node
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}
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let size = this.formatPlaceholderSize(prevBrotherOffset)
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this.setPlaceholderRect(
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node.width,
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size,
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nodeRect.originLeft,
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nodeRect.originTop - size
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)
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}
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}
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// 检测是否重叠
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this.checkIsOverlap({
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node,
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dir: 'v',
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prevBrotherOffset,
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nextBrotherOffset,
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size: oneFourthHeight,
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pos: y,
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nodeRect
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})
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}
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}
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// 水平方向比较
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handleHorizontalCheck(node, checkList) {
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let x = this.mouseMoveX
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let y = this.mouseMoveY
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let nodeRect = this.getNodeRect(node)
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let oneFourthWidth = nodeRect.width / 4
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let { prevBrotherOffset, nextBrotherOffset } =
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this.getNodeDistanceToSiblingNode(checkList, node, nodeRect, 'h')
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if (nodeRect.top <= y && nodeRect.bottom >= y) {
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// 检测兄弟节点位置
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if (
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!this.overlapNode &&
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!this.prevNode &&
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!this.nextNode &&
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!node.isRoot
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) {
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let checkIsPrevNode =
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nextBrotherOffset > 0 // 距离下一个兄弟节点的距离大于0
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? x < nodeRect.right + nextBrotherOffset && x >= nodeRect.right // 那么在当前节点外底部判断
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: x <= nodeRect.right && x >= nodeRect.right - oneFourthWidth // 否则在当前节点内底部1/4区间判断
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let checkIsNextNode =
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prevBrotherOffset > 0 // 距离上一个兄弟节点的距离大于0
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? x > nodeRect.left - prevBrotherOffset && x <= nodeRect.left // 那么在当前节点外底部判断
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: x <= nodeRect.left + oneFourthWidth && x >= nodeRect.left
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if (checkIsPrevNode) {
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this.prevNode = node
|
||
let size = this.formatPlaceholderSize(nextBrotherOffset)
|
||
this.setPlaceholderRect(
|
||
size,
|
||
node.height,
|
||
nodeRect.originRight,
|
||
nodeRect.originTop
|
||
)
|
||
} else if (checkIsNextNode) {
|
||
this.nextNode = node
|
||
let size = this.formatPlaceholderSize(prevBrotherOffset)
|
||
this.setPlaceholderRect(
|
||
size,
|
||
node.height,
|
||
nodeRect.originLeft - size,
|
||
nodeRect.originTop
|
||
)
|
||
}
|
||
}
|
||
// 检测是否重叠
|
||
this.checkIsOverlap({
|
||
node,
|
||
dir: 'h',
|
||
prevBrotherOffset,
|
||
nextBrotherOffset,
|
||
size: oneFourthWidth,
|
||
pos: x,
|
||
nodeRect
|
||
})
|
||
}
|
||
}
|
||
|
||
// 获取节点距前一个和后一个节点的距离
|
||
getNodeDistanceToSiblingNode(checkList, node, nodeRect, dir) {
|
||
let dir1 = dir === 'v' ? 'top' : 'left'
|
||
let dir2 = dir === 'v' ? 'bottom' : 'right'
|
||
let index = getNodeIndexInNodeList(node, checkList)
|
||
let prevBrother = null
|
||
let nextBrother = null
|
||
if (index !== -1) {
|
||
if (index - 1 >= 0) {
|
||
prevBrother = checkList[index - 1]
|
||
}
|
||
if (index + 1 <= checkList.length - 1) {
|
||
nextBrother = checkList[index + 1]
|
||
}
|
||
}
|
||
// 和前一个兄弟节点的距离
|
||
let prevBrotherOffset = 0
|
||
if (prevBrother) {
|
||
let prevNodeRect = this.getNodeRect(prevBrother)
|
||
prevBrotherOffset = nodeRect[dir1] - prevNodeRect[dir2]
|
||
// 间距小于10就当它不存在
|
||
prevBrotherOffset =
|
||
prevBrotherOffset >= this.minOffset ? prevBrotherOffset / 2 : 0
|
||
} else {
|
||
// 没有前一个兄弟节点，那么假设和前一个节点的距离为20
|
||
prevBrotherOffset = this.minOffset
|
||
}
|
||
// 和后一个兄弟节点的距离
|
||
let nextBrotherOffset = 0
|
||
if (nextBrother) {
|
||
let nextNodeRect = this.getNodeRect(nextBrother)
|
||
nextBrotherOffset = nextNodeRect[dir1] - nodeRect[dir2]
|
||
nextBrotherOffset =
|
||
nextBrotherOffset >= this.minOffset ? nextBrotherOffset / 2 : 0
|
||
} else {
|
||
nextBrotherOffset = this.minOffset
|
||
}
|
||
return {
|
||
prevBrotherOffset,
|
||
nextBrotherOffset
|
||
}
|
||
}
|
||
|
||
// 处理提示元素的大小
|
||
formatPlaceholderSize(size) {
|
||
const { nodeDragPlaceholderMaxSize } = this.mindMap.opt
|
||
return size > 0 ? Math.min(size, nodeDragPlaceholderMaxSize) : 5
|
||
}
|
||
|
||
// 设置提示元素的大小和位置
|
||
setPlaceholderRect(w, h, x, y) {
|
||
this.placeholder.size(w, h).move(x, y)
|
||
}
|
||
|
||
// 检测是否重叠
|
||
checkIsOverlap({
|
||
node,
|
||
dir,
|
||
prevBrotherOffset,
|
||
nextBrotherOffset,
|
||
size,
|
||
pos,
|
||
nodeRect
|
||
}) {
|
||
let dir1 = dir === 'v' ? 'top' : 'left'
|
||
let dir2 = dir === 'v' ? 'bottom' : 'right'
|
||
if (!this.overlapNode && !this.prevNode && !this.nextNode) {
|
||
if (
|
||
nodeRect[dir1] + (prevBrotherOffset > 0 ? 0 : size) <= pos &&
|
||
nodeRect[dir2] - (nextBrotherOffset > 0 ? 0 : size) >= pos
|
||
) {
|
||
this.overlapNode = node
|
||
}
|
||
}
|
||
}
|
||
|
||
// 处理逻辑结构图
|
||
handleLogicalStructure(node) {
|
||
const checkList = this.commonGetNodeCheckList(node)
|
||
this.handleVerticalCheck(node, checkList)
|
||
}
|
||
|
||
// 处理思维导图
|
||
handleMindMap(node) {
|
||
const checkList = node.parent
|
||
? node.parent.children.filter(item => {
|
||
let sameDir = true
|
||
if (node.layerIndex === 1) {
|
||
sameDir = item.dir === node.dir
|
||
}
|
||
return sameDir && !this.checkIsInBeingDragNodeList(item)
|
||
})
|
||
: []
|
||
this.handleVerticalCheck(node, checkList)
|
||
}
|
||
|
||
// 处理组织结构图
|
||
handleOrganizationStructure(node) {
|
||
const checkList = this.commonGetNodeCheckList(node)
|
||
this.handleHorizontalCheck(node, checkList)
|
||
}
|
||
|
||
// 处理目录组织图
|
||
handleCatalogOrganization(node) {
|
||
const checkList = this.commonGetNodeCheckList(node)
|
||
if (node.layerIndex === 1) {
|
||
this.handleHorizontalCheck(node, checkList)
|
||
} else {
|
||
this.handleVerticalCheck(node, checkList)
|
||
}
|
||
}
|
||
|
||
// 处理时间轴
|
||
handleTimeLine(node) {
|
||
let checkList = this.commonGetNodeCheckList(node)
|
||
if (node.layerIndex === 1) {
|
||
this.handleHorizontalCheck(node, checkList)
|
||
} else {
|
||
this.handleVerticalCheck(node, checkList)
|
||
}
|
||
}
|
||
|
||
// 处理时间轴2
|
||
handleTimeLine2(node) {
|
||
let checkList = this.commonGetNodeCheckList(node)
|
||
if (node.layerIndex === 1) {
|
||
this.handleHorizontalCheck(node, checkList)
|
||
} else {
|
||
// 处于上方的三级节点需要特殊处理，因为节点排列方向反向了
|
||
if (node.dir === 'top' && node.layerIndex === 2) {
|
||
this.handleVerticalCheck(node, checkList, true)
|
||
} else {
|
||
this.handleVerticalCheck(node, checkList)
|
||
}
|
||
}
|
||
}
|
||
|
||
// 处理鱼骨图
|
||
handleFishbone(node) {
|
||
let checkList = node.parent
|
||
? node.parent.children.filter(item => {
|
||
return item.layerIndex > 1 && !this.checkIsInBeingDragNodeList(item)
|
||
})
|
||
: []
|
||
if (node.layerIndex === 1) {
|
||
this.handleHorizontalCheck(node, checkList)
|
||
} else {
|
||
// 处于上方的三级节点需要特殊处理，因为节点排列方向反向了
|
||
if (node.dir === 'top' && node.layerIndex === 2) {
|
||
this.handleVerticalCheck(node, checkList, true)
|
||
} else {
|
||
this.handleVerticalCheck(node, checkList)
|
||
}
|
||
}
|
||
}
|
||
|
||
// 获取节点的兄弟节点列表通用方法
|
||
commonGetNodeCheckList(node) {
|
||
return node.parent
|
||
? [...node.parent.children].filter(item => {
|
||
return !this.checkIsInBeingDragNodeList(item)
|
||
})
|
||
: []
|
||
}
|
||
|
||
// 计算节点的位置尺寸信息
|
||
getNodeRect(node) {
|
||
let { scaleX, scaleY, translateX, translateY } = this.drawTransform
|
||
let { left, top, width, height } = node
|
||
let originLeft = left
|
||
let originTop = top
|
||
let originBottom = top + height
|
||
let originRight = left + width
|
||
let right = (left + width) * scaleX + translateX
|
||
let bottom = (top + height) * scaleY + translateY
|
||
left = left * scaleX + translateX
|
||
top = top * scaleY + translateY
|
||
return {
|
||
width,
|
||
height,
|
||
left,
|
||
top,
|
||
right,
|
||
bottom,
|
||
originLeft,
|
||
originTop,
|
||
originBottom,
|
||
originRight
|
||
}
|
||
}
|
||
|
||
// 检查某个节点是否在被拖拽节点内
|
||
checkIsInBeingDragNodeList(node) {
|
||
return !!this.beingDragNodeList.find(item => {
|
||
return item.uid === node.uid || item.isAncestor(node)
|
||
})
|
||
}
|
||
|
||
// 插件被移除前做的事情
|
||
beforePluginRemove() {
|
||
this.unBindEvent()
|
||
}
|
||
|
||
// 插件被卸载前做的事情
|
||
beforePluginDestroy() {
|
||
this.unBindEvent()
|
||
}
|
||
}
|
||
|
||
Drag.instanceName = 'drag'
|
||
|
||
export default Drag
|