From 65908526da9426cc0b4101fce30f87e3f9df3634 Mon Sep 17 00:00:00 2001
From: ssdfasd <2156608475@qq.com>
Date: Thu, 12 Mar 2026 18:12:50 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8DHierarchyPanel=EF=BC=9A?=
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- 将右键菜单移到Child窗口内部，修复空白区域右键不弹出菜单的问题
- 添加InvisibleButton作为拖放目标，支持将实体拖到根级别
---
 ui/src/panels/HierarchyPanel.cpp | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/ui/src/panels/HierarchyPanel.cpp b/ui/src/panels/HierarchyPanel.cpp
index 5cb2b05d..9cd41c74 100644
--- a/ui/src/panels/HierarchyPanel.cpp
+++ b/ui/src/panels/HierarchyPanel.cpp
@@ -28,11 +28,6 @@ void HierarchyPanel::Render() {
     
     std::string filter = m_searchBuffer;
     
-    if (ImGui::BeginPopupContextWindow("HierarchyContextMenu", ImGuiPopupFlags_MouseButtonRight | ImGuiPopupFlags_NoOpenOverItems)) {
-        RenderCreateMenu(INVALID_ENTITY);
-        ImGui::EndPopup();
-    }
-    
     ImGui::BeginChild("EntityList");
     
     for (EntityID id : SceneManager::Get().GetRootEntities()) {
@@ -45,6 +40,25 @@ void HierarchyPanel::Render() {
         }
     }
     
+    if (ImGui::BeginPopupContextWindow("HierarchyContextMenu", ImGuiPopupFlags_MouseButtonRight | ImGuiPopupFlags_NoOpenOverItems)) {
+        RenderCreateMenu(INVALID_ENTITY);
+        ImGui::EndPopup();
+    }
+    
+    ImGui::InvisibleButton("##DragTarget", ImVec2(-1, -1));
+    if (ImGui::BeginDragDropTarget()) {
+        if (const ImGuiPayload* payload = ImGui::AcceptDragDropPayload("ENTITY_ID")) {
+            EntityID sourceId = *(const EntityID*)payload->Data;
+            if (sourceId != INVALID_ENTITY) {
+                const Entity* sourceEntity = SceneManager::Get().GetEntity(sourceId);
+                if (sourceEntity && sourceEntity->parent != INVALID_ENTITY) {
+                    SceneManager::Get().MoveEntity(sourceId, INVALID_ENTITY);
+                }
+            }
+        }
+        ImGui::EndDragDropTarget();
+    }
+    
     ImGui::EndChild();
     
     ImGui::End();