diff --git a/src/app/core/models/engine.ts b/src/app/core/models/engine.ts
index ec462d2..5bd8221 100644
--- a/src/app/core/models/engine.ts
+++ b/src/app/core/models/engine.ts
@@ -1,11 +1,12 @@
 import { Workbench } from '@/app/core/models/workbench';
 import { IEngineProps } from '@/app/shared/types';
 import { Cursor } from '@/app/core/models/cursor';
-import { Screen } from '@/app/core/models/screen';
+import { Screen, ScreenType } from '@/app/core/models/screen';
 import { uid } from '@/app/shared/uid';
 import { TreeNode } from '@/app/core/models/tree-node';
+import { Event } from '@/app/shared/event';
 
-export class Engine {
+export class Engine extends Event {
   id: string;
 
   props: IEngineProps<Engine>;
@@ -18,7 +19,12 @@ export class Engine {
 
   screen: Screen;
 
-  constructor() {
+  constructor(props: IEngineProps<Engine>) {
+    super(props);
+    this.props = {
+      ...Engine.defaultProps,
+      ...props
+    };
     this.init();
     this.id = uid();
   }
@@ -41,4 +47,23 @@ export class Engine {
     });
     return results;
   }
+
+  static defaultProps: IEngineProps<Engine> = {
+    shortcuts: [],
+    effects: [],
+    drivers: [],
+    rootComponentName: 'Root',
+    sourceIdAttrName: 'data-designer-source-id',
+    nodeIdAttrName: 'data-designer-node-id',
+    contentEditableAttrName: 'data-content-editable',
+    contentEditableNodeIdAttrName: 'data-content-editable-node-id',
+    clickStopPropagationAttrName: 'data-click-stop-propagation',
+    nodeSelectionIdAttrName: 'data-designer-node-helpers-id',
+    nodeDragHandlerAttrName: 'data-designer-node-drag-handler',
+    screenResizeHandlerAttrName: 'data-designer-screen-resize-handler',
+    nodeResizeHandlerAttrName: 'data-designer-node-resize-handler',
+    outlineNodeIdAttrName: 'data-designer-outline-node-id',
+    nodeTranslateAttrName: 'data-designer-node-translate-handler',
+    defaultScreenType: ScreenType.PC
+  };
 }
diff --git a/src/app/core/models/move-helper.ts b/src/app/core/models/move-helper.ts
index 1db2c86..0f1e735 100644
--- a/src/app/core/models/move-helper.ts
+++ b/src/app/core/models/move-helper.ts
@@ -2,6 +2,8 @@ import { Operation } from './operation';
 import { TreeNode } from './tree-node';
 import { Viewport } from './viewport';
 import { IPoint, Rect } from '../../shared/coordinate';
+import { CursorDragType } from '@/app/core/models/cursor';
+import { DragNodeEvent } from '@/app/core/events';
 
 export enum ClosestPosition {
   Before = 'BEFORE',
@@ -63,4 +65,54 @@ export class MoveHelper {
   outlineClosestDirection: ClosestPosition = null;
 
   dragging = false;
+
+  constructor(props: IMoveHelperProps) {
+    this.operation = props.operation;
+    this.rootNode = this.operation.tree;
+  }
+
+  get cursor() {
+    return this.operation.engine.cursor;
+  }
+
+  get viewport() {
+    return this.operation.workspace.viewport;
+  }
+
+  get outline() {
+    return this.operation.workspace.outline;
+  }
+
+  get hasDragNodes() {
+    return this.dragNodes.length > 0;
+  }
+
+  get closestDirection() {
+    if (this.activeViewport === this.outline) {
+      return this.outlineClosestDirection;
+    }
+    return this.viewportClosestDirection;
+  }
+
+  dragStart(props: IMoveHelperDragStartProps) {
+    const nodes = TreeNode.filterDraggable(props?.dragNodes);
+    if (nodes.length) {
+      this.dragNodes = nodes;
+      this.trigger(
+        new DragNodeEvent({
+          target: this.operation.tree,
+          source: this.dragNodes
+        })
+      );
+      this.viewport.cacheElements();
+      this.cursor.setDragType(CursorDragType.Move);
+      this.dragging = true;
+    }
+  }
+
+  trigger(event: any) {
+    if (this.operation) {
+      return this.operation.dispatch(event);
+    }
+  }
 }
diff --git a/src/app/core/models/operation.ts b/src/app/core/models/operation.ts
index 635fa58..062657f 100644
--- a/src/app/core/models/operation.ts
+++ b/src/app/core/models/operation.ts
@@ -5,6 +5,8 @@ import { Selection } from './selection';
 import { Hover } from './hover';
 import { TransformHelper } from './transform-helper';
 import { MoveHelper } from './move-helper';
+import { ICustomEvent } from '@/app/shared/event';
+import { isFn } from '@/app/shared/types';
 
 export interface IOperation {
   tree?: ITreeNode;
@@ -29,4 +31,9 @@ export class Operation {
   requests = {
     snapshot: null
   };
+
+  dispatch(event: ICustomEvent, callback?: () => void) {
+    if (this.workspace.dispatch(event) === false) return;
+    if (isFn(callback)) return callback();
+  }
 }
diff --git a/src/app/core/models/viewport.ts b/src/app/core/models/viewport.ts
index 8184011..2cde9f3 100644
--- a/src/app/core/models/viewport.ts
+++ b/src/app/core/models/viewport.ts
@@ -1,5 +1,6 @@
 import { Workspace } from './workspace';
 import { Engine } from './engine';
+import { globalThisPolyfill } from '@/app/shared/globalThisPolyfill';
 
 export interface IViewportProps {
   engine: Engine;
@@ -50,4 +51,25 @@ export class Viewport {
   moveInsertionType: IViewportMoveInsertionType;
 
   nodeElementsStore: Record<string, HTMLElement[]> = {};
+
+  cacheElements() {
+    this.nodeElementsStore = {};
+    this.viewportRoot?.querySelectorAll(`*[${this.nodeIdAttrName}]`).forEach((element: HTMLElement) => {
+      const id = element.getAttribute(this.nodeIdAttrName);
+      this.nodeElementsStore[id] = this.nodeElementsStore[id] || [];
+      this.nodeElementsStore[id].push(element);
+    });
+  }
+
+  get viewportRoot() {
+    return this.isIframe ? this.contentWindow?.document?.body : this.viewportElement;
+  }
+
+  get isMaster() {
+    return this.contentWindow === globalThisPolyfill;
+  }
+
+  get isIframe() {
+    return !!this.contentWindow?.frameElement && !this.isMaster;
+  }
 }
diff --git a/src/app/core/models/workspace.ts b/src/app/core/models/workspace.ts
index 4377f66..6b1d7b3 100644
--- a/src/app/core/models/workspace.ts
+++ b/src/app/core/models/workspace.ts
@@ -2,6 +2,8 @@ import { Engine } from '@/app/core/models/engine';
 import { Viewport } from '@/app/core/models/viewport';
 import { Operation } from '@/app/core/models/operation';
 import { History } from '@/app/core/models/history';
+import { ICustomEvent } from '@/app/shared/event';
+import { IEngineContext } from '@/app/core/types';
 
 export interface IWorkspace {
   id?: string;
@@ -39,4 +41,17 @@ export class Workspace {
   history: History;
 
   props: IWorkspaceProps;
+
+  getEventContext(): IEngineContext {
+    return {
+      workbench: this.engine.workbench,
+      workspace: this,
+      engine: this.engine,
+      viewport: this.viewport
+    };
+  }
+
+  dispatch(event: ICustomEvent) {
+    return this.engine.dispatch(event, this.getEventContext());
+  }
 }