feat(measurements): Provide for the Load (SR) measurements button to optionally clear existing measurements prior to loading the SR. (#4586)

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

@@ -1,7 +1,6 @@
 import React from 'react';
 import getSopClassHandlerModule from './getSopClassHandlerModule';
 import { srProtocol } from './getHangingProtocolModule';
-import onModeEnter from './onModeEnter';
 import getCommandsModule from './commandsModule';
 import preRegistration from './init';
 import { id } from './id.js';
@@ -9,6 +8,8 @@ import toolNames from './tools/toolNames';
 import hydrateStructuredReport from './utils/hydrateStructuredReport';
 import createReferencedImageDisplaySet from './utils/createReferencedImageDisplaySet';
 import Enums from './enums';
+import { ViewportActionButton } from '@ohif/ui';
+import i18n from '@ohif/i18n';
 
 const Component = React.lazy(() => {
   return import(/* webpackPrefetch: true */ './components/OHIFCornerstoneSRViewport');
@@ -30,7 +31,30 @@ const dicomSRExtension = {
    * Only required property. Should be a unique value across all extensions.
    */
   id,
-  onModeEnter,
+
+  onModeEnter({ servicesManager }) {
+    const { toolbarService } = servicesManager.services;
+
+    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']);
+  },
 
   preRegistration,