mirror of
https://github.com/wanglin2/mind-map.git
synced 2026-02-21 18:37:43 +08:00
317 lines
9.8 KiB
JavaScript
317 lines
9.8 KiB
JavaScript
import {
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bfsWalk,
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throttle
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} from './utils'
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import Base from './layouts/Base'
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/**
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* javascript comment
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* @Author: 王林25
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* @Date: 2021-11-23 17:38:55
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* @Desc: 节点拖动类
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*/
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class Drag extends Base {
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/**
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* @Author: 王林
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* @Date: 2021-07-10 22:35:16
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* @Desc: 构造函数
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*/
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constructor({
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mindMap
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}) {
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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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/**
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* javascript comment
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* @Author: 王林25
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* @Date: 2021-11-23 19:33:56
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* @Desc: 复位
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*/
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reset() {
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// 当前拖拽节点
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this.node = null
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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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// 连接线
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this.line = 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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// 克隆节点左上角的坐标
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this.cloneNodeLeft = 0
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this.cloneNodeTop = 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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}
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/**
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* @Author: 王林
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* @Date: 2021-07-10 22:36:36
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* @Desc: 绑定事件
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*/
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bindEvent() {
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this.checkOverlapNode = throttle(this.checkOverlapNode, 300, this)
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this.mindMap.on('node_mousedown', (node, e) => {
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if (this.mindMap.opt.readonly || node.isGeneralization) {
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return
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}
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if (e.which !== 1 || node.isRoot) {
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return
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}
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e.preventDefault()
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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 {
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scaleX,
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scaleY,
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translateX,
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translateY
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} = this.drawTransform
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this.offsetX = e.clientX - (node.left * scaleX + translateX)
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this.offsetY = e.clientY - (node.top * scaleY + translateY)
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//
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this.node = node
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this.isMousedown = true
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let {
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x,
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y
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} = 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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this.mindMap.on('mousemove', (e) => {
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if (this.mindMap.opt.readonly) {
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return
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}
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if (!this.isMousedown) {
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return
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}
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e.preventDefault()
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let {
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x,
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y
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} = 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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if ((Math.abs(x - this.mouseDownX) <= 10 && Math.abs(y - this.mouseDownY) <= 10) && !this.node.isDrag) {
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return
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}
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this.mindMap.renderer.clearAllActive()
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this.onMove(x, y)
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})
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this.onMouseup = this.onMouseup.bind(this)
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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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/**
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* javascript comment
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* @Author: 王林25
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* @Date: 2021-11-23 19:38:02
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* @Desc: 鼠标松开事件
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*/
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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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let _nodeIsDrag = this.node.isDrag
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this.node.isDrag = false
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this.node.show()
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this.removeCloneNode()
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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.renderer.setNodeActive(this.overlapNode, false)
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this.mindMap.execCommand('MOVE_NODE_TO', this.node, this.overlapNode)
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} else if (this.prevNode) { // 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.renderer.setNodeActive(this.prevNode, false)
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this.mindMap.execCommand('INSERT_AFTER', this.node, this.prevNode)
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} else if (this.nextNode) { // 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.renderer.setNodeActive(this.nextNode, false)
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this.mindMap.execCommand('INSERT_BEFORE', this.node, this.nextNode)
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} else if (_nodeIsDrag) {
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// 自定义位置
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let {
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x,
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y
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} = this.mindMap.toPos(e.clientX - this.offsetX, e.clientY - this.offsetY)
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let {
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scaleX,
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scaleY,
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translateX,
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translateY
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} = this.drawTransform
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x = (x - translateX) / scaleX
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y = (y - translateY) / scaleY
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this.node.left = x
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this.node.top = y
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this.node.customLeft = x
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this.node.customTop = y
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this.mindMap.execCommand('SET_NODE_CUSTOM_POSITION', this.node, x, y)
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this.mindMap.render()
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}
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this.reset()
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}
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/**
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* javascript comment
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* @Author: 王林25
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* @Date: 2021-11-23 19:34:53
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* @Desc: 创建克隆节点
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*/
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createCloneNode() {
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if (!this.clone) {
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// 节点
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this.clone = this.node.group.clone()
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this.clone.opacity(0.5)
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this.clone.css('z-index', 99999)
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this.node.isDrag = true
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this.node.hide()
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// 连接线
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this.line = this.draw.path()
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this.line.opacity(0.5)
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this.node.style.line(this.line)
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// 同级位置占位符
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this.placeholder = this.draw.rect().fill({
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color: this.node.style.merge('lineColor', true)
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})
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this.mindMap.draw.add(this.clone)
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}
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}
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/**
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* javascript comment
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* @Author: 王林25
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* @Date: 2021-11-23 19:35:16
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* @Desc: 移除克隆节点
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*/
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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.line.remove()
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this.placeholder.remove()
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}
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/**
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* javascript comment
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* @Author: 王林25
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* @Date: 2021-11-23 18:53:47
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* @Desc: 拖动中
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*/
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onMove(x, y) {
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if (!this.isMousedown) {
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return;
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}
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this.createCloneNode()
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let {
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scaleX,
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scaleY,
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translateX,
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translateY
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} = this.drawTransform
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this.cloneNodeLeft = x - this.offsetX
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this.cloneNodeTop = y - this.offsetY
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x = (this.cloneNodeLeft - translateX) / scaleX
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y = (this.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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// 连接线
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let parent = this.node.parent
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this.line.plot(this.quadraticCurvePath(parent.left + parent.width / 2, parent.top + parent.height / 2, x + this.node.width / 2, y + this.node.height / 2))
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this.checkOverlapNode()
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}
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/**
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* @Author: 王林
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* @Date: 2021-07-11 10:20:43
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* @Desc: 检测重叠节点
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*/
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checkOverlapNode() {
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if (!this.drawTransform) {
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return
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}
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let {
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scaleX,
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scaleY,
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translateX,
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translateY
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} = this.drawTransform
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let checkRight = this.cloneNodeLeft + this.node.width * scaleX
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let checkBottom = this.cloneNodeTop + this.node.height * scaleX
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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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bfsWalk(this.mindMap.renderer.root, (node) => {
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if (node.nodeData.data.isActive) {
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this.mindMap.renderer.setNodeActive(node, false)
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}
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if (node === this.node || this.node.isParent(node)) {
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return
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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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let {
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left,
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top,
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width,
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height
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} = node
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let _left = left
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let _top = top
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let _bottom = top + height
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let right = (left + width) * scaleX + translateX
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let bottom = (top + height) * scaleY + translateY
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left = left * scaleX + translateX
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top = top * scaleY + translateY
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// 检测是否重叠
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if (!this.overlapNode) {
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if (
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left <= checkRight && right >= this.cloneNodeLeft &&
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top <= checkBottom && bottom >= this.cloneNodeTop
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) {
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this.overlapNode = node
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}
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}
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// 检测兄弟节点位置
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if (!this.prevNode && !this.nextNode && this.node.isBrother(node)) {
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if (left <= checkRight && right >= this.cloneNodeLeft) {
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if (this.cloneNodeTop > bottom && this.cloneNodeTop <= bottom + 10) {
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this.prevNode = node
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this.placeholder.size(node.width, 10).move(_left, _bottom)
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} else if (checkBottom < top && checkBottom >= top - 10) {
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this.nextNode = node
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this.placeholder.size(node.width, 10).move(_left, _top - 10)
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}
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}
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}
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})
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if (this.overlapNode) {
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this.mindMap.renderer.setNodeActive(this.overlapNode, true)
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}
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}
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}
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export default Drag |