diff --git a/src/app/core/drivers/drag-drop-driver.ts b/src/app/core/drivers/drag-drop-driver.ts
new file mode 100644
index 0000000..a8ce06b
--- /dev/null
+++ b/src/app/core/drivers/drag-drop-driver.ts
@@ -0,0 +1,8 @@
+import { EventDriver } from '../../shared/event';
+import { Engine } from '../models';
+
+export class DragDropDriver extends EventDriver<Engine> {
+  mouseDownTimer = null;
+
+  startEvent: MouseEvent;
+}
diff --git a/src/app/core/externals.ts b/src/app/core/externals.ts
index 98a2c17..8e7fbf7 100644
--- a/src/app/core/externals.ts
+++ b/src/app/core/externals.ts
@@ -26,5 +26,5 @@ export const isBehaviorHost = (val: any): val is IBehaviorHost => val?.Behavior
 export const isBehaviorList = (val: any): val is IBehavior[] => Array.isArray(val) && val.every(isBehavior);
 
 export const createDesigner = () => {
-  return new Engine();
+  // return new Engine();
 };
diff --git a/src/app/core/models/engine.ts b/src/app/core/models/engine.ts
index 5bd8221..7e8e3ee 100644
--- a/src/app/core/models/engine.ts
+++ b/src/app/core/models/engine.ts
@@ -6,6 +6,9 @@ import { uid } from '@/app/shared/uid';
 import { TreeNode } from '@/app/core/models/tree-node';
 import { Event } from '@/app/shared/event';
 
+/**
+ * 设计器引擎
+ */
 export class Engine extends Event {
   id: string;
 
@@ -36,6 +39,10 @@ export class Engine extends Event {
     // this.keyboard = new Keyboard(this)
   }
 
+  findNodeById(id: string) {
+    return TreeNode.findById(id);
+  }
+
   findMovingNodes(): TreeNode[] {
     const results = [];
     this.workbench.eachWorkspace(workspace => {