fix(updateIndex): getNumberOfSlices is defined when used with a 3D vi…

…ewport (#4424)

extensions/cornerstone/src/Viewport/Overlays/ViewportImageScrollbar.tsx

@@ -1,6 +1,6 @@
 import React, { useEffect } from 'react';
 import PropTypes from 'prop-types';
-import { Enums, Types, utilities } from '@cornerstonejs/core';
+import { Enums, VolumeViewport3D } from '@cornerstonejs/core';
 import { utilities as csToolsUtils } from '@cornerstonejs/tools';
 import { ImageScrollbar } from '@ohif/ui';
 
@@ -39,7 +39,7 @@ function CornerstoneImageScrollbar({
 
     const viewport = cornerstoneViewportService.getCornerstoneViewport(viewportId);
 
-    if (!viewport) {
+    if (!viewport || viewport instanceof VolumeViewport3D) {
       return;
     }
 
@@ -64,6 +64,7 @@ function CornerstoneImageScrollbar({
 
     const updateIndex = event => {
       const viewport = cornerstoneViewportService.getCornerstoneViewport(viewportId);
+      if(!viewport || viewport instanceof VolumeViewport3D) return
       const { imageIndex, newImageIdIndex = imageIndex } = event.detail;
       const numberOfSlices = viewport.getNumberOfSlices();
       // find the index of imageId in the imageIds