Kind of working, updated cornerstone-core lib.

Packages/ohif-viewerbase/client/components/viewer/imageViewerViewport/imageViewerViewport.js

@@ -278,7 +278,8 @@ const loadDisplaySetIntoViewport = (data, templateData) => {
         }
 
         // Enabling new eventDispatches form cornerstoneTools v3
-        //cornerstoneTools.addEnabledElement(element);
+        //cornerstoneTools.addEnabledElement(element); NOTE: This should be done by cTools internally now, no?
+        console.log('====imageViewerViewport, instantiateTools');
         toolManager.instantiateTools(element);
 
         // Use the tool manager to enable the currently active tool for this

Packages/ohif-viewerbase/client/lib/toolManager.js

@@ -27,8 +27,12 @@ export const toolManager = {
             toolManager.setDefaultTool(OHIF.viewer.defaultTool);
         }
 
+        console.log('======INITIALIZING CORNERSTONETOOLS======');
+
         cornerstoneTools.init();
 
+        console.log('======CORNERSTONETOOLS INITIALIZED======');
+
         tools = [
           'Length',
           'Angle',
@@ -135,6 +139,8 @@ export const toolManager = {
             toolManager.init();
         }
 
+        console.log("toolManager.getActiveTool");
+
         // If activeTool is not defined, we should set as defaultTool
         if (!activeTool) {
             activeTool = defaultTool;
@@ -159,3 +165,5 @@ export const toolManager = {
         //
     }
 };
+
+toolManager.init();