chore: allow only 1 region to be selected

e2e/src/selecting/region.prod.e2e-spec.js

+const { AtlasPage } = require('../../src/util')
+const { height, width } = require('../../opts')
+
+describe('> selecting regions', () => {
+
+  const duplicatedRegion = {
+    atlas: 'Multilevel Human Atlas',
+    template: `ICBM 152 2009c Nonlinear Asymmetric`,
+    position: [-0.256, 26.028, -11.678]
+  }
+  describe(`> when selecting duplicated regions at ${duplicatedRegion.atlas} / ${duplicatedRegion.template} / ${JSON.stringify(duplicatedRegion.position)}`, () => {
+    it(`> when click, should only select a single region`, async () => {
+      const newPage = new AtlasPage()
+      await newPage.init()
+      await newPage.goto()
+      await newPage.selectAtlasTemplateParcellation(duplicatedRegion.atlas, duplicatedRegion.template)
+      await newPage.wait(500)
+      await newPage.waitForAsync()
+      await newPage.execScript(`interactiveViewer.viewerHandle.setNavigationLoc(${JSON.stringify(duplicatedRegion.position.map(v => v*1e6))}, true)`)
+      await newPage.wait(500)
+      await newPage.cursorMoveTo({
+        position: [ width * 3 / 4, height / 4 ]
+      })
+      await newPage.wait(500)
+      const txt = await newPage.getText(`[floatingMouseContextualContainerDirective]`)
+      expect(txt.indexOf(`left`)).toBeGreaterThanOrEqual(0)
+      expect(txt.indexOf(`right`)).toBeGreaterThanOrEqual(0)
+
+      await newPage.cursorMoveToAndClick({
+        position: [width * 3 / 4, height / 4]
+      })
+      await newPage.wait(500)
+      await newPage.waitForAsync()
+      const visible = await newPage.areVisible(`region-menu`)
+      expect(visible.length).toEqual(1)
+
+    })
+  })
+})

src/atlasViewer/atlasViewer.component.ts

@@ -435,7 +435,7 @@ export class AtlasViewer implements OnDestroy, OnInit, AfterViewInit {
       if (!this.onhoverSegments) return
       this.store.dispatch(
         viewerStateSetSelectedRegions({
-          selectRegions: this.onhoverSegments
+          selectRegions: this.onhoverSegments.slice(0, 1)
         })
       )
     }