[IDC-1670] Better display of derived datasets in side panel. (#1962)

* WIP

* WIP

* WIP

* WIP

* Working click on seg.

* Load SEG if not loaded and set active.

* RTSTRUCT

* feat: 🎸 Display SEG and RTSTRUCT in side panel

* Throw error if dataset not available.

* Add delay in microscopy viewer e2e test.

* Add delay in microscopy viewer e2e test.

extensions/dicom-segmentation/src/utils/setActiveLabelMap.js

@@ -0,0 +1,67 @@
+import { utils, log } from '@ohif/core';
+import cornerstoneTools from 'cornerstone-tools';
+import refreshViewports from './refreshViewports';
+
+const { studyMetadataManager } = utils;
+
+/**
+ *
+ *
+ * @param {*} viewportSpecificData
+ * @param {*} studies
+ * @param {*} displaySet
+ * @param {*} firstImageId
+ * @param {*} activeLabelmapIndex
+ * @returns
+ */
+export default async function setActiveLabelmap(
+  referencedDisplaySet,
+  studies,
+  displaySet,
+  callback = () => {},
+  onDisplaySetLoadFailure = err => {
+    throw new Error(err.message);
+  }
+) {
+  const studyMetadata = studyMetadataManager.get(
+    referencedDisplaySet.StudyInstanceUID
+  );
+  const firstImageId = studyMetadata.getFirstImageId(
+    referencedDisplaySet.displaySetInstanceUID
+  );
+
+  let { state } = cornerstoneTools.getModule('segmentation');
+
+  let brushStackState = state.series[firstImageId];
+  const activeLabelmapIndex = brushStackState
+    ? brushStackState.activeLabelmapIndex
+    : undefined;
+
+  if (displaySet.labelmapIndex === activeLabelmapIndex) {
+    log.warn(`${activeLabelmapIndex} is already the active labelmap`);
+    return displaySet.labelmapIndex;
+  }
+
+  if (!displaySet.isLoaded) {
+    const loadPromise = displaySet.load(referencedDisplaySet, studies);
+
+    loadPromise.catch(error => {
+      onDisplaySetLoadFailure(error);
+
+      // Return old index.
+      return activeLabelmapIndex;
+    });
+
+    await loadPromise;
+  }
+
+  // This might have just been created, so need to use the non-cached value.
+  state = cornerstoneTools.getModule('segmentation').state;
+  brushStackState = state.series[firstImageId];
+  brushStackState.activeLabelmapIndex = displaySet.labelmapIndex;
+
+  refreshViewports();
+  callback();
+
+  return displaySet.labelmapIndex;
+}