From e0bd169069d17311c1974b835cb82d19fd6c1dfd Mon Sep 17 00:00:00 2001
From: unknown <18119604035@163.com>
Date: Tue, 31 Oct 2023 15:46:52 +0800
Subject: [PATCH] =?UTF-8?q?=E7=BA=BF=E4=B8=8A=E8=AF=BE=E8=AF=BE=E6=97=B6?=
 =?UTF-8?q?=E6=8B=96=E5=8A=A8=E4=B8=BA=E7=88=B6=E5=AD=90=E7=BA=A7=E6=97=B6?=
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---
 src/pages/course/compenents/hours.tsx | 41 +++++++++++++++++++++------
 1 file changed, 32 insertions(+), 9 deletions(-)

diff --git a/src/pages/course/compenents/hours.tsx b/src/pages/course/compenents/hours.tsx
index 8765df8..e9f0e53 100644
--- a/src/pages/course/compenents/hours.tsx
+++ b/src/pages/course/compenents/hours.tsx
@@ -65,6 +65,7 @@ export const TreeHours = (props: PropInterface) => {
     }
     props.onRemoveItem(id);
   };
+  
   const onDrop: TreeProps["onDrop"] = (info) => {
     const dropKey = info.node.key;
     const dragKey = info.dragNode.key;
@@ -96,23 +97,35 @@ export const TreeHours = (props: PropInterface) => {
 
     // Find dragObject
     let dragObj: DataNode;
-    loop(data, dragKey, (item, index, arr) => {
-      arr.splice(index, 1);
-      dragObj = item;
-    });
+    let dragLength = (info.dragNode as any).props.pos.split("-").length;
+    let dropLength = (info.node as any).props.pos.split("-").length;
 
     if (!info.dropToGap) {
       // Drop on the content
-      loop(data, dropKey, (item) => {
-        item.children = item.children || [];
-        // where to insert 示例添加到头部，可以是随意位置
-        item.children.unshift(dragObj);
-      });
+      if (
+        (dropPosition == 0 && dropPos.length == 3) ||
+        (dropPosition == 0 && dropPos.length == 2 && dragLength == 2)
+      ) {
+      } else {
+        loop(data, dragKey, (item, index, arr) => {
+          arr.splice(index, 1);
+          dragObj = item;
+        });
+        loop(data, dropKey, (item) => {
+          item.children = item.children || [];
+          // where to insert 示例添加到头部，可以是随意位置
+          item.children.unshift(dragObj);
+        });
+      }
     } else if (
       ((info.node as any).props.children || []).length > 0 && // Has children
       (info.node as any).props.expanded && // Is expanded
       dropPosition === 1 // On the bottom gap
     ) {
+      loop(data, dragKey, (item, index, arr) => {
+        arr.splice(index, 1);
+        dragObj = item;
+      });
       loop(data, dropKey, (item) => {
         item.children = item.children || [];
         // where to insert 示例添加到头部，可以是随意位置
@@ -121,6 +134,16 @@ export const TreeHours = (props: PropInterface) => {
         // item to the tail of the children
       });
     } else {
+      if (
+        (dragLength == 3 && dropLength == 2) ||
+        (dragLength == 2 && dropLength == 3)
+      ) {
+        return;
+      }
+      loop(data, dragKey, (item, index, arr) => {
+        arr.splice(index, 1);
+        dragObj = item;
+      });
       let ar: DataNode[] = [];
       let i: number;
       loop(data, dropKey, (_item, index, arr) => {