diff --git a/packages/mindplot/src/components/DesignerBuilder.ts b/packages/mindplot/src/components/DesignerBuilder.ts
index e8160a61..953d2bd8 100644
--- a/packages/mindplot/src/components/DesignerBuilder.ts
+++ b/packages/mindplot/src/components/DesignerBuilder.ts
@@ -21,6 +21,7 @@ import PersistenceManager from './PersistenceManager';
 import Designer from './Designer';
 import { DesignerOptions } from './DesignerOptionsBuilder';
 import WidgetManager from './WidgetManager';
+import ReadOnlyWidgetManager from './ReadOnlyWidgetManager';
 
 let designer: Designer;
 
@@ -35,8 +36,11 @@ export function buildDesigner(options: DesignerOptions): Designer {
   const persistence = options.persistenceManager;
   $assert(persistence, 'persistence must be defined');
   PersistenceManager.init(persistence);
-  const widgetManager = options.widgetManager ? options.widgetManager : new WidgetManager();
+
+  // If not manager was specifed, use the readonly one.
+  const widgetManager = options.widgetManager ? options.widgetManager : new ReadOnlyWidgetManager();
   WidgetManager.init(widgetManager);
+
   return designer;
 }
 
diff --git a/packages/mindplot/src/components/ReadOnlyWidgetManager.ts b/packages/mindplot/src/components/ReadOnlyWidgetManager.ts
new file mode 100644
index 00000000..cdf55883
--- /dev/null
+++ b/packages/mindplot/src/components/ReadOnlyWidgetManager.ts
@@ -0,0 +1,30 @@
+/*
+ *    Copyright [2021] [wisemapping]
+ *
+ *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
+ *   It is basically the Apache License, Version 2.0 (the "License") plus the
+ *   "powered by wisemapping" text requirement on every single page;
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the license at
+ *
+ *       http://www.wisemapping.org/license
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+import WidgetManager from './WidgetManager';
+
+class ReadOnlyWidgetManager extends WidgetManager {
+  showEditorForLink(): void {
+    throw new Error('ReadOnly widget manager does not support edition');
+  }
+
+  showEditorForNote(): void {
+    throw new Error('ReadOnly widget manager does not support edition');
+  }
+}
+
+export default ReadOnlyWidgetManager;
diff --git a/packages/mindplot/src/components/ScreenManager.ts b/packages/mindplot/src/components/ScreenManager.ts
index ba790d03..18b0a94d 100644
--- a/packages/mindplot/src/components/ScreenManager.ts
+++ b/packages/mindplot/src/components/ScreenManager.ts
@@ -99,18 +99,17 @@ class ScreenManager {
 
   private tocuchEvents = ['touchstart', 'touchend', 'touchmove'];
 
-  // the received type was changed from MouseEvent to "any", because we must support touch events
-  getWorkspaceMousePosition(event: any) {
-    let x;
-    let y;
+  getWorkspaceMousePosition(event: MouseEvent | TouchEvent): Point {
+    let x: number;
+    let y: number;
 
     if (this.mouseEvents.includes(event.type)) {
       // Retrieve current mouse position.
-      x = event.clientX;
-      y = event.clientY;
+      x = (event as MouseEvent).clientX;
+      y = (event as MouseEvent).clientY;
     } else if (this.tocuchEvents.includes(event.type)) {
-      x = event.touches[0].clientX;
-      y = event.touches[0].clientY;
+      x = (event as TouchEvent).touches[0].clientX;
+      y = (event as TouchEvent).touches[0].clientY;
     }
 
     // if value is zero assert throws error
@@ -138,11 +137,11 @@ class ScreenManager {
     return new Point(x, y);
   }
 
-  getContainer() {
+  getContainer(): JQuery {
     return this._divContainer;
   }
 
-  setOffset(x: number, y: number) {
+  setOffset(x: number, y: number): void {
     this._padding.x = x;
     this._padding.y = y;
   }
diff --git a/packages/mindplot/src/components/WidgetManager.ts b/packages/mindplot/src/components/WidgetManager.ts
index d829a705..fa2cd0cc 100644
--- a/packages/mindplot/src/components/WidgetManager.ts
+++ b/packages/mindplot/src/components/WidgetManager.ts
@@ -6,9 +6,9 @@ import NoteIcon from './NoteIcon';
 import Topic from './Topic';
 import { $msg } from './Messages';
 
-class WidgetManager {
+abstract class WidgetManager {
   // eslint-disable-next-line no-use-before-define
-  static _instance: WidgetManager;
+  private static _instance: WidgetManager;
 
   static init = (instance: WidgetManager) => {
     this._instance = instance;
@@ -18,7 +18,7 @@ class WidgetManager {
     return this._instance;
   }
 
-  private createTooltip(mindmapElement, title, linkModel: LinkModel, noteModel: NoteModel) {
+  private createTooltip(mindmapElement, title: string, linkModel: LinkModel, noteModel: NoteModel) {
     const webcomponentShadowRoot = $($('#mindmap-comp')[0].shadowRoot);
     let tooltip = webcomponentShadowRoot.find('#mindplot-svg-tooltip');
     if (!tooltip.length) {
@@ -75,11 +75,11 @@ class WidgetManager {
     this.createTooltip(linkIcon.getElement().peer, $msg('LINK'), linkModel, undefined);
   }
 
-  createTooltipForNote(topic: Topic, noteModel: NoteModel, noteIcon: NoteIcon) {
+  createTooltipForNote(topic: Topic, noteModel: NoteModel, noteIcon: NoteIcon): void {
     this.createTooltip(noteIcon.getElement().peer, $msg('NOTE'), undefined, noteModel);
   }
 
-  configureEditorForLink(topic: Topic, linkModel: LinkModel, linkIcon: LinkIcon) {
+  configureEditorForLink(topic: Topic, linkModel: LinkModel, linkIcon: LinkIcon): void {
     const htmlImage = linkIcon.getElement().peer;
     htmlImage.addEvent('click', (evt) => {
       this.showEditorForLink(topic, linkModel, linkIcon);
@@ -87,7 +87,7 @@ class WidgetManager {
     });
   }
 
-  configureEditorForNote(topic: Topic, noteModel: NoteModel, noteIcon: NoteIcon) {
+  configureEditorForNote(topic: Topic, noteModel: NoteModel, noteIcon: NoteIcon): void {
     const htmlImage = noteIcon.getElement().peer;
     htmlImage.addEvent('click', (evt) => {
       this.showEditorForNote(topic, noteModel, noteIcon);
@@ -95,13 +95,9 @@ class WidgetManager {
     });
   }
 
-  showEditorForLink(topic: Topic, linkModel: LinkModel, linkIcon: LinkIcon) {
-    console.log('Show link editor not yet implemented');
-  }
+  abstract showEditorForLink(topic: Topic, linkModel: LinkModel, linkIcon: LinkIcon): void;
 
-  showEditorForNote(topic: Topic, noteModel: NoteModel, noteIcon: NoteIcon) {
-    console.log('Show note editor not yet implemented');
-  }
+  abstract showEditorForNote(topic: Topic, noteModel: NoteModel, noteIcon: NoteIcon): void;
 }
 
 export default WidgetManager;