fix(SR): Bring back the onModeEnter for the cornerstone-dicom-sr extension that was accidentally removed by PR #4586 (#4616)

extensions/cornerstone-dicom-sr/src/onModeEnter.tsx

@@ -0,0 +1,39 @@
+import React from 'react';
+
+import { SOPClassHandlerId, SOPClassHandlerId3D } from './id';
+import { ViewportActionButton } from '@ohif/ui';
+import i18n from '@ohif/i18n';
+
+export default function onModeEnter({ servicesManager }) {
+  const { displaySetService, toolbarService } = servicesManager.services;
+  const displaySetCache = displaySetService.getDisplaySetCache();
+
+  const srDisplaySets = [...displaySetCache.values()].filter(
+    ds => ds.SOPClassHandlerId === SOPClassHandlerId || ds.SOPClassHandlerId === SOPClassHandlerId3D
+  );
+
+  srDisplaySets.forEach(ds => {
+    // New mode route, allow SRs to be hydrated again
+    ds.isHydrated = false;
+  });
+
+  toolbarService.addButtons([
+    {
+      // A base/default button for loading measurements. It is added to the toolbar below.
+      // Customizations to this button can be made in the mode or by another extension.
+      // For example, the button label can be changed and/or the command to clear
+      // the measurements can be dropped.
+      id: 'loadSRMeasurements',
+      component: props => (
+        <ViewportActionButton {...props}>{i18n.t('Common:LOAD')}</ViewportActionButton>
+      ),
+      props: {
+        commands: ['clearMeasurements', 'loadSRMeasurements'],
+      },
+    },
+  ]);
+
+  // The toolbar used in the viewport's status bar. Modes and extensions can further customize
+  // it to optionally add other buttons.
+  toolbarService.createButtonSection('loadSRMeasurements', ['loadSRMeasurements']);
+}