feat: tree add parent for event callback

#4849

Author: tangjinzhou

components/vc-tree/TreeNode.tsx

@@ -119,7 +119,10 @@ export default defineComponent({
     });
     const instance = getCurrentInstance();
     const eventData = computed(() => {
-      return convertNodePropsToEventData(props);
+      const { eventKey } = props;
+      const { keyEntities } = context.value;
+      const { parent } = keyEntities[eventKey] || {};
+      return { ...convertNodePropsToEventData(props), parent };
     });
     const dragNodeEvent: DragNodeEvent = reactive({
       eventData,

components/vc-tree/interface.tsx

@@ -34,6 +34,7 @@ export interface EventDataNode extends DataNode {
   pos?: string;
   active?: boolean;
   dataRef?: DataNode;
+  parent?: DataNode;
   eventKey?: Key; // 兼容 v2， 推荐直接用 key
 }
 

components/vc-tree/props.ts

@@ -45,6 +45,8 @@ export const treeNodeProps = {
 
   /** New added in Tree for easy data access */
   data: { type: Object as PropType<DataNode>, default: undefined as DataNode },
+  parent: { type: Object as PropType<DataNode>, default: undefined as DataNode },
+
   isStart: { type: Array as PropType<boolean[]> },
   isEnd: { type: Array as PropType<boolean[]> },
   active: { type: Boolean, default: undefined },

components/vc-tree/utils/treeUtil.ts

@@ -375,7 +375,7 @@ export function getTreeNodeProps(
     checked: checkedKeys.indexOf(key) !== -1,
     halfChecked: halfCheckedKeys.indexOf(key) !== -1,
     pos: String(entity ? entity.pos : ''),
-
+    parent: entity.parent,
     // [Legacy] Drag props
     // Since the interaction of drag is changed, the semantic of the props are
     // not accuracy, I think it should be finally removed