Feature：默认改为鼠标移上节点才显示展开收起按钮

simple-mind-map/index.js

@@ -103,7 +103,9 @@ const defaultOpt = {
   // 是否在点击了画布外的区域时结束节点文本的编辑状态
   isEndNodeTextEditOnClickOuter: true,
   // 最大历史记录数
-  maxHistoryCount: 1000
+  maxHistoryCount: 1000,
+  // 是否一直显示节点的展开收起按钮，默认为鼠标移上去和激活时才显示
+  alwaysShowExpandBtn: false
 }
 
 //  思维导图

simple-mind-map/src/Node.js

@@ -1,7 +1,7 @@
 import Style from './Style'
 import Shape from './Shape'
 import { asyncRun } from './utils'
-import { G } from '@svgdotjs/svg.js'
+import { G, Rect } from '@svgdotjs/svg.js'
 import nodeGeneralizationMethods from './utils/nodeGeneralization'
 import nodeExpandBtnMethods from './utils/nodeExpandBtn'
 import nodeCommandWrapsMethods from './utils/nodeCommandWraps'
@@ -74,6 +74,7 @@ class Node {
     this._lines = []
     this._generalizationLine = null
     this._generalizationNode = null
+    this._unVisibleRectRegionNode = null
     // 尺寸信息
     this._rectInfo = {
       imgContentWidth: 0,
@@ -242,13 +243,23 @@ class Node {
   layout() {
     // 清除之前的内容
     this.group.clear()
-    let { width, textContentItemMargin } = this
+    let { width, height, textContentItemMargin } = this
     let { paddingY } = this.getPaddingVale()
     paddingY += this.shapePadding.paddingY
     // 节点形状
     this.shapeNode = this.shapeInstance.createShape()
     this.group.add(this.shapeNode)
     this.updateNodeShape()
+    // 渲染一个隐藏的矩形区域，用来触发展开收起按钮的显示
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      if (!this._unVisibleRectRegionNode) {
+        this._unVisibleRectRegionNode = new Rect()
+      }
+      this._unVisibleRectRegionNode.fill({
+        color: 'transparent'
+      }).size(this.expandBtnSize, height).x(width).y(0)
+      this.group.add(this._unVisibleRectRegionNode)
+    }
     // 概要节点添加一个带所属节点id的类名
     if (this.isGeneralization && this.generalizationBelongNode) {
       this.group.addClass('generalization_' + this.generalizationBelongNode.uid)
@@ -374,9 +385,12 @@ class Node {
       this.mindMap.emit('node_mouseup', this, e)
     })
     this.group.on('mouseenter', e => {
+      // 显示展开收起按钮
+      this.showExpandBtn()
       this.mindMap.emit('node_mouseenter', this, e)
     })
     this.group.on('mouseleave', e => {
+      this.hideExpandBtn()
       this.mindMap.emit('node_mouseleave', this, e)
     })
     // 双击事件
@@ -424,14 +438,21 @@ class Node {
     if (!this.group) {
       return
     }
-    let { enableNodeTransitionMove, nodeTransitionMoveDuration } =
+    let { enableNodeTransitionMove, nodeTransitionMoveDuration, alwaysShowExpandBtn } =
       this.mindMap.opt
-    // 需要移除展开收缩按钮
+    if (alwaysShowExpandBtn) {
-    if (this._expandBtn && this.nodeData.children.length <= 0) {
+      // 需要移除展开收缩按钮
-      this.removeExpandBtn()
+      if (this._expandBtn && this.nodeData.children.length <= 0) {
+        this.removeExpandBtn()
+      } else {
+        // 更新展开收起按钮
+        this.renderExpandBtn()
+      }
     } else {
-      // 更新展开收起按钮
+      // 如果是收起状态，那么显示展开收起按钮
-      this.renderExpandBtn()
+      if (!this.nodeData.data.expand) {
+        this.showExpandBtn()
+      }
     }
     // 更新概要
     this.renderGeneralization()
@@ -730,9 +751,10 @@ class Node {
 
   //  获取padding值
   getPaddingVale() {
+    let { isActive }= this.nodeData.data
     return {
-      paddingX: this.getStyle('paddingX', true, this.nodeData.data.isActive),
+      paddingX: this.getStyle('paddingX', true, isActive),
-      paddingY: this.getStyle('paddingY', true, this.nodeData.data.isActive)
+      paddingY: this.getStyle('paddingY', true, isActive)
     }
   }
 

simple-mind-map/src/Render.js

@@ -366,6 +366,8 @@ class Render {
         if (!node.nodeData.data.isActive) {
           node.nodeData.data.isActive = true
           this.addActiveNode(node)
+          // 激活节点需要显示展开收起按钮
+          node.showExpandBtn()
           setTimeout(() => {
             node.updateNodeShape()
           }, 0)
@@ -735,6 +737,12 @@ class Render {
     this.setNodeData(node, {
       isActive: active
     })
+    // 切换激活状态，需要切换展开收起按钮的显隐
+    if (active) {
+      node.showExpandBtn()
+    } else {
+      node.hideExpandBtn()
+    }
     node.updateNodeShape()
   }
 

simple-mind-map/src/layouts/CatalogOrganization.js

@@ -199,6 +199,9 @@ class CatalogOrganization extends Base {
       return []
     }
     let { left, top, width, height, expandBtnSize } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let len = node.children.length
     let marginX = this.getMarginX(node.layerIndex + 1)
     if (node.isRoot) {

simple-mind-map/src/layouts/Fishbone.js

@@ -231,6 +231,9 @@ class Fishbone extends Base {
       return []
     }
     let { top, height, expandBtnSize } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let len = node.children.length
     if (node.isRoot) {
       // 当前节点是根节点

simple-mind-map/src/layouts/LogicalStructure.js

@@ -159,6 +159,9 @@ class LogicalStructure extends Base {
       return []
     }
     let { left, top, width, height, expandBtnSize } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let marginX = this.getMarginX(node.layerIndex + 1)
     let s1 = (marginX - expandBtnSize) * 0.6
     let nodeUseLineStyle = this.mindMap.themeConfig.nodeUseLineStyle
@@ -188,6 +191,9 @@ class LogicalStructure extends Base {
       return []
     }
     let { left, top, width, height, expandBtnSize } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let nodeUseLineStyle = this.mindMap.themeConfig.nodeUseLineStyle
     node.children.forEach((item, index) => {
       let x1 =
@@ -213,6 +219,9 @@ class LogicalStructure extends Base {
       return []
     }
     let { left, top, width, height, expandBtnSize } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let nodeUseLineStyle = this.mindMap.themeConfig.nodeUseLineStyle
     node.children.forEach((item, index) => {
       let x1 =

simple-mind-map/src/layouts/MindMap.js

@@ -198,6 +198,9 @@ class MindMap extends Base {
       return []
     }
     let { left, top, width, height, expandBtnSize } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let marginX = this.getMarginX(node.layerIndex + 1)
     let s1 = (marginX - expandBtnSize) * 0.6
     let nodeUseLineStyle = this.mindMap.themeConfig.nodeUseLineStyle
@@ -235,6 +238,9 @@ class MindMap extends Base {
       return []
     }
     let { left, top, width, height, expandBtnSize } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let nodeUseLineStyle = this.mindMap.themeConfig.nodeUseLineStyle
     node.children.forEach((item, index) => {
       let x1 =
@@ -269,6 +275,9 @@ class MindMap extends Base {
       return []
     }
     let { left, top, width, height, expandBtnSize } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let nodeUseLineStyle = this.mindMap.themeConfig.nodeUseLineStyle
     node.children.forEach((item, index) => {
       let x1 =
@@ -276,7 +285,7 @@ class MindMap extends Base {
           ? left + width / 2
           : item.dir === 'left'
           ? left - expandBtnSize
-          : left + width + 20
+          : left + width + expandBtnSize
       let y1 = top + height / 2
       let x2 = item.dir === 'left' ? item.left + item.width : item.left
       let y2 = item.top + item.height / 2

simple-mind-map/src/layouts/OrganizationStructure.js

@@ -179,6 +179,9 @@ class OrganizationStructure extends Base {
       return []
     }
     let { left, top, width, height, expandBtnSize, isRoot } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let x1 = left + width / 2
     let y1 = top + height
     let marginX = this.getMarginX(node.layerIndex + 1)

simple-mind-map/src/layouts/Timeline.js

@@ -238,6 +238,9 @@ class Timeline extends Base {
       return []
     }
     let { left, top, width, height, expandBtnSize } = node
+    if (!this.mindMap.opt.alwaysShowExpandBtn) {
+      expandBtnSize = 0
+    }
     let len = node.children.length
     if (node.isRoot) {
       // 当前节点是根节点

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

@@ -32,14 +32,15 @@ function createExpandNodeContent() {
 
 //  创建或更新展开收缩按钮内容
 function updateExpandBtnNode() {
+  let { expand } = this.nodeData.data
   // 如果本次和上次的展开状态一样则返回
-  if (this.nodeData.data.expand === this._lastExpandBtnType) return
+  if (expand === this._lastExpandBtnType) return
   if (this._expandBtn) {
     this._expandBtn.clear()
   }
   this.createExpandNodeContent()
   let node
-  if (this.nodeData.data.expand === false) {
+  if (expand === false) {
     node = this._openExpandNode
     this._lastExpandBtnType = false
   } else {
@@ -108,10 +109,32 @@ function removeExpandBtn() {
   }
 }
 
+// 显示展开收起按钮
+function showExpandBtn() {
+  if (this.mindMap.opt.alwaysShowExpandBtn) return
+  setTimeout(() => {
+    this.renderExpandBtn()
+  }, 0)
+}
+
+// 隐藏展开收起按钮
+function hideExpandBtn() {
+  if (this.mindMap.opt.alwaysShowExpandBtn) return
+  // 非激活状态且展开状态鼠标移出才隐藏按钮
+  let { isActive, expand } = this.nodeData.data
+  if (!isActive && expand) {
+    setTimeout(() => {
+      this.removeExpandBtn()
+    }, 0)
+  }
+}
+
 export default {
   createExpandNodeContent,
   updateExpandBtnNode,
   updateExpandBtnPos,
   renderExpandBtn,
-  removeExpandBtn
+  removeExpandBtn,
+  showExpandBtn,
+  hideExpandBtn
 }