fix(maxlevel): fix maxLevel does not work for external drag

affects: @he-tree/vue

Author: phphe

packages/he-tree-vue/src/components/DraggableTree.ts

@@ -666,29 +666,26 @@ const cpt = defineComponent({
  return;
  }
  // check max level
- if (
- startTree &&
- targetTree!.maxLevel != null &&
- targetTree!.maxLevel > 0
- ) {
- const dragNode = startTree.dragNode!;
- let childMaxLevel = 0;
- hp.walkTreeData(
- dragNode,
- (node) => {
- if (node!.level > childMaxLevel) {
- childMaxLevel = node!.level;
+ if (targetTree!.maxLevel != null && targetTree!.maxLevel > 0) {
+ let dragNodeWithChildLevel = 1;
+ if (startTree) {
+ const dragNode = startTree.dragNode!;
+ let childMaxLevel = 0;
+ hp.walkTreeData(
+ dragNode,
+ (node) => {
+ if (node!.level > childMaxLevel) {
+ childMaxLevel = node!.level;
+ }
+ },
+ {
+ childrenKey: CHILDREN,
  }
- },
- {
- childrenKey: CHILDREN,
- }
- );
+ );
+ dragNodeWithChildLevel = childMaxLevel - dragNode.level + 1;
+ }
  const willLevel =
- childMaxLevel -
- dragNode.level +
- 1 +
- (dp.parent ? dp.parent.level : 0);
+ dragNodeWithChildLevel + (dp.parent ? dp.parent.level : 0);
  if (willLevel > targetTree!.maxLevel) {
  setDroppable(false);
  return;