Feat：节点图片支持拖拽调整大小

simple-mind-map/full.js

@@ -8,6 +8,8 @@ import Drag from './src/plugins/Drag.js'
 import Select from './src/plugins/Select.js'
 import AssociativeLine from './src/plugins/AssociativeLine'
 import RichText from './src/plugins/RichText'
+import NodeImgAdjust from './src/plugins/NodeImgAdjust.js'
+import TouchEvent from './src/plugins/TouchEvent.js'
 import xmind from './src/parse/xmind.js'
 import markdown from './src/parse/markdown.js'
 import icons from './src/svg/icons.js'
@@ -32,5 +34,7 @@ MindMap
   .usePlugin(Select)
   .usePlugin(AssociativeLine)
   .usePlugin(RichText)
+  .usePlugin(TouchEvent)
+  .usePlugin(NodeImgAdjust)
 
 export default MindMap

simple-mind-map/package.json

@@ -1,6 +1,6 @@
 {
   "name": "simple-mind-map",
-  "version": "0.6.4-fix.1",
+  "version": "0.6.5",
   "description": "一个简单的web在线思维导图",
   "authors": [
     {

simple-mind-map/src/core/render/Render.js

@@ -869,13 +869,14 @@ class Render {
   }
 
   //  设置节点图片
-  setNodeImage(node, { url, title, width, height }) {
+  setNodeImage(node, { url, title, width, height, custom = false }) {
     this.setNodeDataRender(node, {
       image: url,
       imageTitle: title || '',
       imageSize: {
         width,
-        height
+        height,
+        custom
       }
     })
   }

simple-mind-map/src/core/render/node/nodeCreateContents.js

@@ -17,6 +17,15 @@ function createImgNode() {
   node.on('dblclick', e => {
     this.mindMap.emit('node_img_dblclick', this, e)
   })
+  node.on('mouseenter', e => {
+    this.mindMap.emit('node_img_mouseenter', this, node, e)
+  })
+  node.on('mouseleave', e => {
+    this.mindMap.emit('node_img_mouseleave', this, node, e)
+  })
+  node.on('mousemove', e => {
+    this.mindMap.emit('node_img_mousemove', this, node, e)
+  })
   return {
     node,
     width: imgSize[0],
@@ -26,9 +35,12 @@ function createImgNode() {
 
 //  获取图片显示宽高
 function getImgShowSize() {
+  const { custom, width, height } = this.nodeData.data.imageSize
+  // 如果是自定义了图片的宽高，那么不受最大宽高限制
+  if (custom) return [width, height]
   return resizeImgSize(
-    this.nodeData.data.imageSize.width,
-    this.nodeData.data.imageSize.height,
+    width,
+    height,
     this.mindMap.themeConfig.imgMaxWidth,
     this.mindMap.themeConfig.imgMaxHeight
   )

simple-mind-map/src/plugins/NodeImgAdjust.js

@@ -0,0 +1,222 @@
+// 节点图片大小调整插件
+import { resizeImgSizeByOriginRatio } from '../utils/index'
+import btnsSvg from '../svg/btns'
+
+class NodeImgAdjust {
+  //  构造函数
+  constructor({ mindMap }) {
+    this.mindMap = mindMap
+    this.resizeBtnSize = 26 // 调整按钮的大小
+    this.handleEl = null // 自定义元素，用来渲染临时图片、调整按钮
+    this.isShowHandleEl = false // 自定义元素是否在显示中
+    this.node = null // 当前节点实例
+    this.img = null // 当前节点的图片节点
+    this.rect = null // 当前图片节点的尺寸信息
+    this.isMousedown = false // 当前是否是按住调整按钮状态
+    this.currentImgWidth = 0 // 当前拖拽实时图片的大小
+    this.currentImgHeight = 0
+    this.isAdjusted = false // 是否是拖拽结束后的渲染期间
+    this.bindEvent()
+  }
+
+  // 监听事件
+  bindEvent() {
+    this.onNodeImgMouseleave = this.onNodeImgMouseleave.bind(this)
+    this.onNodeImgMousemove = this.onNodeImgMousemove.bind(this)
+    this.onMousemove = this.onMousemove.bind(this)
+    this.onMouseup = this.onMouseup.bind(this)
+    this.onRenderEnd = this.onRenderEnd.bind(this)
+    this.mindMap.on('node_img_mouseleave', this.onNodeImgMouseleave)
+    this.mindMap.on('node_img_mousemove', this.onNodeImgMousemove)
+    this.mindMap.on('mousemove', this.onMousemove)
+    this.mindMap.on('mouseup', this.onMouseup)
+    this.mindMap.on('node_mouseup', this.onMouseup)
+    this.mindMap.on('node_tree_render_end', this.onRenderEnd)
+  }
+
+  // 解绑事件
+  unBindEvent() {
+    this.mindMap.off('node_img_mouseleave', this.onNodeImgMouseleave)
+    this.mindMap.off('node_img_mousemove', this.onNodeImgMousemove)
+    this.mindMap.off('mousemove', this.onMousemove)
+    this.mindMap.off('mouseup', this.onMouseup)
+    this.mindMap.off('node_mouseup', this.onMouseup)
+    this.mindMap.off('node_tree_render_end', this.onRenderEnd)
+  }
+
+  // 节点图片鼠标移动事件
+  onNodeImgMousemove(node, img) {
+    // 如果当前正在拖动调整中那么直接返回
+    if (this.isMousedown || this.isAdjusted) return
+    // 如果在当前节点内移动，以及自定义元素已经是显示状态，那么直接返回
+    if (this.node === node && this.isShowHandleEl) return
+    // 更新当前节点信息
+    this.node = node
+    this.img = img
+    this.rect = this.img.rbox()
+    // 显示自定义元素
+    this.showHandleEl()
+  }
+
+  // 节点图片鼠标移出事件
+  onNodeImgMouseleave() {
+    if (this.isMousedown) return
+    this.hideHandleEl()
+  }
+
+  // 隐藏节点实际的图片
+  hideNodeImage() {
+    if (!this.img) return
+    this.img.hide()
+  }
+
+  // 显示节点实际的图片
+  showNodeImage() {
+    if (!this.img) return
+    this.img.show()
+  }
+
+  // 显示自定义元素
+  showHandleEl() {
+    if (!this.handleEl) {
+      this.createResizeBtnEl()
+    }
+    this.setHandleElRect()
+    document.body.appendChild(this.handleEl)
+    this.isShowHandleEl = true
+  }
+
+  // 隐藏自定义元素
+  hideHandleEl() {
+    if (!this.isShowHandleEl) return
+    this.isShowHandleEl = false
+    document.body.removeChild(this.handleEl)
+    this.handleEl.style.backgroundImage = ``
+    this.handleEl.style.width = 0
+    this.handleEl.style.height = 0
+    this.handleEl.style.left = 0
+    this.handleEl.style.top = 0
+  }
+
+  // 设置自定义元素尺寸位置信息
+  setHandleElRect() {
+    let { width, height, x, y } = this.rect
+    this.handleEl.style.left = `${x}px`
+    this.handleEl.style.top = `${y}px`
+    this.currentImgWidth = width
+    this.currentImgHeight = height
+    this.updateHandleElSize()
+  }
+
+  // 更新自定义元素宽高
+  updateHandleElSize() {
+    this.handleEl.style.width = `${this.currentImgWidth}px`
+    this.handleEl.style.height = `${this.currentImgHeight}px`
+  }
+
+  // 创建调整按钮元素
+  createResizeBtnEl() {
+    // 容器元素
+    this.handleEl = document.createElement('div')
+    this.handleEl.style.cssText = `
+      pointer-events: none;
+      position: fixed;
+      background-size: cover;
+    `
+    // 调整按钮元素
+    const btnEl = document.createElement('div')
+    btnEl.innerHTML = btnsSvg.imgAdjust
+    btnEl.style.cssText = `
+      position: absolute;
+      right: 0;
+      bottom: 0;
+      pointer-events: auto;
+      background-color: rgba(0, 0, 0, 0.3);
+      width: ${this.resizeBtnSize}px;
+      height: ${this.resizeBtnSize}px;
+      display: flex;
+      justify-content: center;
+      align-items: center;
+      cursor: nwse-resize;
+    `
+    this.handleEl.appendChild(btnEl)
+    // 给按钮元素绑定事件
+    btnEl.addEventListener('mouseenter', () => {
+      // 移入按钮，会触发节点图片的移出事件，所以需要再次显示按钮
+      this.showHandleEl()
+    })
+    btnEl.addEventListener('mouseleave', () => {
+      // 移除按钮，需要隐藏按钮
+      if (this.isMousedown) return
+      this.hideHandleEl()
+    })
+    btnEl.addEventListener('mousedown', e => {
+      this.onMousedown(e)
+    })
+  }
+
+  // 鼠标按钮按下事件
+  onMousedown() {
+    this.isMousedown = true
+    // 隐藏节点实际图片
+    this.hideNodeImage()
+    // 将节点图片渲染到自定义元素上
+    this.handleEl.style.backgroundImage = `url(${this.node.nodeData.data.image})`
+  }
+
+  // 鼠标移动
+  onMousemove(e) {
+    if (!this.isMousedown) return
+    e.preventDefault()
+    // 计算当前拖拽位置对应的图片的实时大小
+    let { width: imageOriginWidth, height: imageOriginHeight } =
+      this.node.nodeData.data.imageSize
+    let newWidth = e.clientX - this.rect.x
+    let newHeight = e.clientY - this.rect.y
+    if (newWidth <= 0 || newHeight <= 0) return
+    let [actWidth, actHeight] = resizeImgSizeByOriginRatio(
+      imageOriginWidth,
+      imageOriginHeight,
+      newWidth,
+      newHeight
+    )
+    this.currentImgWidth = actWidth
+    this.currentImgHeight = actHeight
+    this.updateHandleElSize()
+  }
+
+  // 鼠标松开
+  onMouseup() {
+    if (!this.isMousedown) return
+    // 显示节点实际图片
+    this.showNodeImage()
+    // 隐藏自定义元素
+    this.hideHandleEl()
+    // 更新节点图片为新的大小
+    let { image, imageTitle } = this.node.nodeData.data
+    this.mindMap.execCommand('SET_NODE_IMAGE', this.node, {
+      url: image,
+      title: imageTitle,
+      width: this.currentImgWidth,
+      height: this.currentImgHeight,
+      custom: true // 代表自定义了图片大小
+    })
+    this.isAdjusted = true
+    this.isMousedown = false
+  }
+
+  // 渲染完成事件
+  onRenderEnd() {
+    if (!this.isAdjusted) return
+    this.isAdjusted = false
+  }
+
+  // 插件被移除前做的事情
+  beforePluginRemove() {
+    this.unBindEvent()
+  }
+}
+
+NodeImgAdjust.instanceName = 'nodeImgAdjust'
+
+export default NodeImgAdjust

simple-mind-map/src/svg/btns.js

@@ -4,7 +4,11 @@ const open = `<svg t="1618141562310" class="icon" viewBox="0 0 1024 1024" versio
 //  收缩按钮
 const close = `<svg t="1618141589243" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="13611" width="200" height="200"><path d="M512 105.472c225.28 0 407.04 181.76 407.04 407.04s-181.76 407.04-407.04 407.04-407.04-181.76-407.04-407.04 181.76-407.04 407.04-407.04z m0-74.24c-265.216 0-480.768 215.552-480.768 480.768s215.552 480.768 480.768 480.768 480.768-215.552 480.768-480.768-215.552-480.768-480.768-480.768z" p-id="13612"></path><path d="M252.928 474.624h518.144v74.24h-518.144z" p-id="13613"></path></svg>`
 
+// 图片调整按钮
+const imgAdjust = `<svg width="12px" height="12px" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg"><path fill="#ffffff" d="M1008.128 614.4a25.6 25.6 0 0 0-27.648 5.632l-142.848 142.848L259.072 186.88 401.92 43.52A25.6 25.6 0 0 0 384 0h-358.4a25.6 25.6 0 0 0-25.6 25.6v358.4a25.6 25.6 0 0 0 43.52 17.92l143.36-142.848 578.048 578.048-142.848 142.848a25.6 25.6 0 0 0 17.92 43.52h358.4a25.6 25.6 0 0 0 25.6-25.6v-358.4a25.6 25.6 0 0 0-15.872-25.088z"  /></svg>`
+
 export default {
   open,
-  close
+  close,
+  imgAdjust
 }

simple-mind-map/src/utils/index.js

@@ -50,6 +50,26 @@ export const bfsWalk = (root, callback) => {
   }
 }
 
+// 按原比例缩放图片
+export const resizeImgSizeByOriginRatio = (
+  width,
+  height,
+  newWidth,
+  newHeight
+) => {
+  let arr = []
+  let nRatio = width / height
+  let mRatio = newWidth / newHeight
+  if (nRatio > mRatio) {
+    // 固定高度
+    arr = [nRatio * newHeight, newHeight]
+  } else {
+    // 固定宽度
+    arr = [newWidth, newWidth / nRatio]
+  }
+  return arr
+}
+
 //  缩放图片尺寸
 export const resizeImgSize = (width, height, maxWidth, maxHeight) => {
   let nRatio = width / height
@@ -137,7 +157,12 @@ export const copyRenderTree = (tree, root, removeActiveState = false) => {
 }
 
 //  复制节点树数据
-export const copyNodeTree = (tree, root, removeActiveState = false, keepId = false) => {
+export const copyNodeTree = (
+  tree,
+  root,
+  removeActiveState = false,
+  keepId = false
+) => {
   tree.data = simpleDeepClone(root.nodeData ? root.nodeData.data : root.data)
   // 去除节点id，因为节点id不能重复
   if (tree.data.id && !keepId) delete tree.data.id
@@ -236,8 +261,8 @@ export const degToRad = deg => {
   return deg * (Math.PI / 180)
 }
 
-// 驼峰转连字符 
-export const camelCaseToHyphen = (str) => {
+// 驼峰转连字符
+export const camelCaseToHyphen = str => {
   return str.replace(/([a-z])([A-Z])/g, (...args) => {
     return args[1] + '-' + args[2].toLowerCase()
   })
@@ -258,11 +283,8 @@ export const measureText = (text, { italic, bold, fontSize, fontFamily }) => {
   }
   measureTextContext.save()
   measureTextContext.font = font
-  const {
-    width,
-    actualBoundingBoxAscent,
-    actualBoundingBoxDescent
-  } = measureTextContext.measureText(text)
+  const { width, actualBoundingBoxAscent, actualBoundingBoxDescent } =
+    measureTextContext.measureText(text)
   measureTextContext.restore()
   const height = actualBoundingBoxAscent + actualBoundingBoxDescent
   return { width, height }
@@ -270,7 +292,9 @@ export const measureText = (text, { italic, bold, fontSize, fontFamily }) => {
 
 // 拼接font字符串
 export const joinFontStr = ({ italic, bold, fontSize, fontFamily }) => {
-  return `${italic ? 'italic ' : ''} ${bold ? 'bold ' : ''} ${fontSize}px ${fontFamily} `
+  return `${italic ? 'italic ' : ''} ${
+    bold ? 'bold ' : ''
+  } ${fontSize}px ${fontFamily} `
 }
 
 //  在下一个事件循环里执行任务
@@ -336,7 +360,7 @@ export const checkNodeOuter = (mindMap, node) => {
 
 // 提取html字符串里的纯文本
 let getTextFromHtmlEl = null
-export const getTextFromHtml = (html) => {
+export const getTextFromHtml = html => {
   if (!getTextFromHtmlEl) {
     getTextFromHtmlEl = document.createElement('div')
   }
@@ -345,13 +369,13 @@ export const getTextFromHtml = (html) => {
 }
 
 // 将blob转成data:url
-export const readBlob = (blob) => {
+export const readBlob = blob => {
   return new Promise((resolve, reject) => {
     let reader = new FileReader()
-    reader.onload = (evt) => {
+    reader.onload = evt => {
       resolve(evt.target.result)
     }
-    reader.onerror = (err) => {
+    reader.onerror = err => {
       reject(err)
     }
     reader.readAsDataURL(blob)
@@ -360,11 +384,11 @@ export const readBlob = (blob) => {
 
 // 将dom节点转换成html字符串
 let nodeToHTMLWrapEl = null
-export const nodeToHTML = (node) => {
+export const nodeToHTML = node => {
   if (!nodeToHTMLWrapEl) {
     nodeToHTMLWrapEl = document.createElement('div')
   }
   nodeToHTMLWrapEl.innerHTML = ''
   nodeToHTMLWrapEl.appendChild(node)
   return nodeToHTMLWrapEl.innerHTML
-}
+}

web/src/pages/Edit/components/Edit.vue

@@ -33,6 +33,7 @@ import Select from 'simple-mind-map/src/plugins/Select.js'
 import RichText from 'simple-mind-map/src/plugins/RichText.js'
 import AssociativeLine from 'simple-mind-map/src/plugins/AssociativeLine.js'
 import TouchEvent from 'simple-mind-map/src/plugins/TouchEvent.js'
+import NodeImgAdjust from 'simple-mind-map/src/plugins/NodeImgAdjust.js'
 import Outline from './Outline'
 import Style from './Style'
 import BaseStyle from './BaseStyle'
@@ -68,7 +69,8 @@ MindMap
   .usePlugin(Export)
   .usePlugin(Select)
   .usePlugin(AssociativeLine)
-  // .usePlugin(TouchEvent)
+  .usePlugin(NodeImgAdjust)
+  .usePlugin(TouchEvent)
 
 // 注册自定义主题
 // customThemeList.forEach((item) => {