From d9efb8367995cbd2f615cdae5afffe67683d836f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yi=C4=9Fit=20FINDIKLI?= <yigitfindikli@gmail.com>
Date: Fri, 12 Mar 2021 11:46:39 +0300
Subject: [PATCH] Fixed #9991 - First node dropped into empty tree not
 triggering onNodeDrop

---
 src/app/components/tree/tree.ts | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/app/components/tree/tree.ts b/src/app/components/tree/tree.ts
index 9c1a0279d09..d313b9c4384 100755
--- a/src/app/components/tree/tree.ts
+++ b/src/app/components/tree/tree.ts
@@ -206,7 +206,7 @@ export class UITreeNode implements OnInit {
                     originalEvent: event,
                     dragNode: dragNode,
                     dropNode: this.node,
-                    dropIndex: this.index,
+                    index: this.index,
                     accept: () => {
                         this.processPointDrop(dropParams);
                     }
@@ -218,7 +218,7 @@ export class UITreeNode implements OnInit {
                     originalEvent: event,
                     dragNode: dragNode,
                     dropNode: this.node,
-                    dropIndex: this.index
+                    index: this.index
                 });
             }
         }
@@ -1032,6 +1032,16 @@ export class Tree implements OnInit,AfterContentInit,OnChanges,OnDestroy,Blockab
                 let dragNodeIndex = this.dragNodeIndex;
                 this.dragNodeSubNodes.splice(dragNodeIndex, 1);
                 this.value = this.value||[];
+
+                if (this.value.length === 0) {
+                    this.onNodeDrop.emit({
+                        originalEvent: event,
+                        dragNode: dragNode,
+                        dropNode: null,
+                        index: dragNodeIndex
+                    })
+                }
+
                 this.value.push(dragNode);
 
                 this.dragDropService.stopDrag({