Module: Utility

Overview

Often, an extension will need to expose some useful functionality to the other extensions, or modes that consume the extension. For example, the cornerstone extension, uses its utility module to expose methods via

getUtilityModule({ servicesManager }) {
    return [
      {
        name: 'common',
        exports: {
          getCornerstoneLibraries: () => {
            return { cornerstone, cornerstoneTools };
          },
          getEnabledElement,
          CornerstoneViewportService,
          dicomLoaderService,
        },
      },
      {
        name: 'core',
        exports: {
          Enums: cs3DEnums,
        },
      },
      {
        name: 'tools',
        exports: {
          toolNames,
          Enums: cs3DToolsEnums,
        },
      },
    ];
  },
};

Then a consuming extension can use getModuleEntry to access the methods Below, which is a code from TrackedCornerstoneViewport use the getUtilityModule method to get the internal CornerstoneViewportService which handles the Cornerstone viewport.

extensions/measurement-tracking/src/viewports/TrackedCornerstoneViewport.tsx

const utilityModule = extensionManager.getModuleEntry(
  '@ohif/extension-cornerstone.utilityModule.common'
);

const { CornerstoneViewportService } = utilityModule.exports;