Feat：组织结构图支持曲线连线

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

@@ -375,18 +375,32 @@ class Base {
   }
 
   //  二次贝塞尔曲线
-  quadraticCurvePath(x1, y1, x2, y2) {
-    let cx = x1 + (x2 - x1) * 0.2
-    let cy = y1 + (y2 - y1) * 0.8
+  quadraticCurvePath(x1, y1, x2, y2, v = false) {
+    let cx, cy
+    if (v) {
+      cx = x1 + (x2 - x1) * 0.8
+      cy = y1 + (y2 - y1) * 0.2
+    } else {
+      cx = x1 + (x2 - x1) * 0.2
+      cy = y1 + (y2 - y1) * 0.8
+    }
     return `M ${x1},${y1} Q ${cx},${cy} ${x2},${y2}`
   }
 
   //  三次贝塞尔曲线
-  cubicBezierPath(x1, y1, x2, y2) {
-    let cx1 = x1 + (x2 - x1) / 2
-    let cy1 = y1
-    let cx2 = cx1
-    let cy2 = y2
+  cubicBezierPath(x1, y1, x2, y2, v = false) {
+    let cx1, cy1, cx2, cy2
+    if (v) {
+      cx1 = x1
+      cy1 = y1 + (y2 - y1) / 2
+      cx2 = x2
+      cy2 = cy1
+    } else {
+      cx1 = x1 + (x2 - x1) / 2
+      cy1 = y1
+      cx2 = cx1
+      cy2 = y2
+    }
     return `M ${x1},${y1} C ${cx1},${cy1} ${cx2},${cy2} ${x2},${y2}`
   }
 

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

@@ -34,7 +34,14 @@ class OrganizationStructure extends Base {
       this.renderer.renderTree,
       null,
       (cur, parent, isRoot, layerIndex, index, ancestors) => {
-        let newNode = this.createNode(cur, parent, isRoot, layerIndex, index, ancestors)
+        let newNode = this.createNode(
+          cur,
+          parent,
+          isRoot,
+          layerIndex,
+          index,
+          ancestors
+        )
         // 根节点定位在画布中心位置
         if (isRoot) {
           this.setNodeCenter(newNode)
@@ -148,13 +155,56 @@ class OrganizationStructure extends Base {
 
   //  绘制连线，连接该节点到其子节点
   renderLine(node, lines, style, lineStyle) {
-    if (lineStyle === 'direct') {
+    if (lineStyle === 'curve') {
+      this.renderLineCurve(node, lines, style)
+    } else if (lineStyle === 'direct') {
       this.renderLineDirect(node, lines, style)
     } else {
       this.renderLineStraight(node, lines, style)
     }
   }
 
+  //  曲线风格连线
+  renderLineCurve(node, lines, style) {
+    if (node.children.length <= 0) {
+      return []
+    }
+    let { left, top, width, height, expandBtnSize } = node
+    const { alwaysShowExpandBtn, notShowExpandBtn } = this.mindMap.opt
+    if (!alwaysShowExpandBtn || notShowExpandBtn) {
+      expandBtnSize = 0
+    }
+    const {
+      nodeUseLineStyle,
+      rootLineStartPositionKeepSameInCurve,
+      rootLineKeepSameInCurve
+    } = this.mindMap.themeConfig
+    node.children.forEach((item, index) => {
+      if (node.layerIndex === 0) {
+        expandBtnSize = 0
+      }
+      let x1 = left + width / 2
+      let y1 =
+        node.layerIndex === 0 && !rootLineStartPositionKeepSameInCurve
+          ? top + height / 2
+          : top + height + expandBtnSize
+      let x2 = item.left + item.width / 2
+      let y2 = item.top
+      let path = ''
+      // 节点使用横线风格，需要额外渲染横线
+      let nodeUseLineStylePath = nodeUseLineStyle
+        ? ` L ${item.left},${y2} L ${item.left + item.width},${y2}`
+        : ''
+      if (node.isRoot && !rootLineKeepSameInCurve) {
+        path =
+          this.quadraticCurvePath(x1, y1, x2, y2, true) + nodeUseLineStylePath
+      } else {
+        path = this.cubicBezierPath(x1, y1, x2, y2, true) + nodeUseLineStylePath
+      }
+      this.setLineStyle(style, lines[index], path, item)
+    })
+  }
+
   //  直连风格
   renderLineDirect(node, lines, style) {
     if (node.children.length <= 0) {