feat(AbstractWidget): add getActiveState() API

Author: floryst

Sources/Widgets/Core/AbstractWidget/index.js

@@ -112,7 +112,11 @@ export function extend(publicAPI, model, initialValues = {}) {
     'handleVisibility',
     '_widgetManager',
   ]);
-  macro.get(publicAPI, model, ['representations', 'widgetState']);
+  macro.get(publicAPI, model, [
+    'representations',
+    'widgetState',
+    'activeState',
+  ]);
   macro.moveToProtected(publicAPI, model, ['widgetManager']);
   macro.event(publicAPI, model, 'ActivateHandle');
 

Sources/Widgets/Core/WidgetManager/index.js

@@ -295,7 +295,7 @@ function vtkWidgetManager(publicAPI, model) {
           model.activeWidget = w;
           wantRender = true;
         } else {
-          wantRender ||= !!w.get().activeState;
+          wantRender ||= !!w.getActiveState();
           w.deactivateAllHandles();
         }
       }