Added other required definitions.

extensions/default/src/getLayoutTemplateModule.js

@@ -30,6 +30,7 @@ const Header = ({ tools, moreTools }) => {
     { name: 'Bone', value: '2500 / 480' },
     { name: 'Brain', value: '80 / 40' },
   ];
+
   /*
   const tools = [
     {

extensions/default/src/getToolbarModule.js

@@ -0,0 +1,19 @@
+const TOOLBAR_BUTTON_TYPES = {
+  COMMAND: 'command',
+  SET_TOOL_ACTIVE: 'setToolActive',
+  BUILT_IN: 'builtIn',
+};
+
+const definitions = [
+  {
+    id: 'Layout',
+    label: 'Layout',
+    icon: 'tool-layout',
+    commandName: TOOLBAR_BUTTON_TYPES.SET_TOOL_ACTIVE,
+    commandOptions: { toolName: 'Layout' }, // TODO
+  },
+];
+
+export default function getToolbarModule() {
+  return { definitions, defaultContext: 'ACTIVE_VIEWPORT::CORNERSTONE' };
+}

extensions/default/src/index.js

@@ -3,6 +3,7 @@ import getDataSourcesModule from './getDataSourcesModule.js';
 import getLayoutTemplateModule from './getLayoutTemplateModule.js';
 import getPanelModule from './getPanelModule.js';
 import getSopClassHandlerModule from './getSopClassHandlerModule.js';
+import getToolbarModule from './getToolbarModule.js';
 import id from './id';
 
 export default {
@@ -15,4 +16,5 @@ export default {
   getLayoutTemplateModule,
   getPanelModule,
   getSopClassHandlerModule,
+  getToolbarModule,
 };