DashboardScene: Fix issues with dashboard empty state (#85406)

Fix

Tests

Make sure edit mode is on when adding panel/library panel

Co-authored-by: kay delaney <kay@grafana.com>

public/app/features/dashboard-scene/pages/DashboardScenePage.test.tsx

@@ -8,10 +8,13 @@ import { getGrafanaContextMock } from 'test/mocks/getGrafanaContextMock';
 import { PanelProps } from '@grafana/data';
 import { getPanelPlugin } from '@grafana/data/test/__mocks__/pluginMocks';
 import { config, getPluginLinkExtensions, locationService, setPluginImportUtils } from '@grafana/runtime';
+import { VizPanel } from '@grafana/scenes';
 import { Dashboard } from '@grafana/schema';
 import { getRouteComponentProps } from 'app/core/navigation/__mocks__/routeProps';
 import { DashboardLoaderSrv, setDashboardLoaderSrv } from 'app/features/dashboard/services/DashboardLoaderSrv';
 
+import { dashboardSceneGraph } from '../utils/dashboardSceneGraph';
+
 import { DashboardScenePage, Props } from './DashboardScenePage';
 import { getDashboardScenePageStateManager } from './DashboardScenePageStateManager';
 
@@ -195,12 +198,44 @@ describe('DashboardScenePage', () => {
     expect(await screen.findByTitle('Panel B')).toBeInTheDocument();
   });
 
+  describe('empty state', () => {
     it('Shows empty state when dashboard is empty', async () => {
       loadDashboardMock.mockResolvedValue({ dashboard: { panels: [] }, meta: {} });
       setup();
 
       expect(await screen.findByText('Start your new dashboard by adding a visualization')).toBeInTheDocument();
     });
+
+    it('shows and hides empty state when panels are added and removed', async () => {
+      setup();
+
+      await waitForDashbordToRender();
+
+      expect(await screen.queryByText('Start your new dashboard by adding a visualization')).not.toBeInTheDocument();
+
+      // Hacking a bit, accessing private cache property to get access to the underlying DashboardScene object
+      const dashboardScenesCache = getDashboardScenePageStateManager()['cache'];
+      const dashboard = dashboardScenesCache['my-dash-uid'];
+      const panels = dashboardSceneGraph.getVizPanels(dashboard);
+
+      act(() => {
+        dashboard.removePanel(panels[0]);
+      });
+      expect(await screen.queryByText('Start your new dashboard by adding a visualization')).not.toBeInTheDocument();
+
+      act(() => {
+        dashboard.removePanel(panels[1]);
+      });
+      expect(await screen.findByText('Start your new dashboard by adding a visualization')).toBeInTheDocument();
+
+      act(() => {
+        dashboard.addPanel(new VizPanel({ title: 'Panel Added', key: 'panel-4', pluginId: 'timeseries' }));
+      });
+
+      expect(await screen.findByTitle('Panel Added')).toBeInTheDocument();
+      expect(await screen.queryByText('Start your new dashboard by adding a visualization')).not.toBeInTheDocument();
+    });
+  });
 });
 
 interface VizOptions {

public/app/features/dashboard-scene/scene/DashboardScene.test.tsx

@@ -283,11 +283,15 @@ describe('DashboardScene', () => {
       });
 
       it('Should create and add a new panel to the dashboard', () => {
+        scene.exitEditMode({ skipConfirm: true });
+        expect(scene.state.isEditing).toBe(false);
+
         scene.onCreateNewPanel();
 
         const body = scene.state.body as SceneGridLayout;
         const gridItem = body.state.children[0] as DashboardGridItem;
 
+        expect(scene.state.isEditing).toBe(true);
         expect(body.state.children.length).toBe(6);
         expect(gridItem.state.body!.state.key).toBe('panel-7');
       });
@@ -298,6 +302,7 @@ describe('DashboardScene', () => {
         const body = scene.state.body as SceneGridLayout;
         const gridRow = body.state.children[0] as SceneGridRow;
 
+        expect(scene.state.isEditing).toBe(true);
         expect(body.state.children.length).toBe(4);
         expect(gridRow.state.key).toBe('panel-7');
         expect(gridRow.state.children[0].state.key).toBe('griditem-1');
@@ -509,11 +514,15 @@ describe('DashboardScene', () => {
       });
 
       it('Should create a new add library panel widget', () => {
+        scene.exitEditMode({ skipConfirm: true });
+        expect(scene.state.isEditing).toBe(false);
+
         scene.onCreateLibPanelWidget();
 
         const body = scene.state.body as SceneGridLayout;
         const gridItem = body.state.children[0] as DashboardGridItem;
 
+        expect(scene.state.isEditing).toBe(true);
         expect(body.state.children.length).toBe(6);
         expect(gridItem.state.body!.state.key).toBe('panel-7');
         expect(gridItem.state.y).toBe(0);

public/app/features/dashboard-scene/scene/DashboardScene.tsx

@@ -740,6 +740,10 @@ export class DashboardScene extends SceneObjectBase<DashboardSceneState> {
       throw new Error('Trying to add a panel in a layout that is not SceneGridLayout');
     }
 
+    if (!this.state.isEditing) {
+      this.onEnterEditMode();
+    }
+
     const sceneGridLayout = this.state.body;
 
     const panelId = dashboardSceneGraph.getNextPanelId(this);
@@ -767,6 +771,10 @@ export class DashboardScene extends SceneObjectBase<DashboardSceneState> {
   }
 
   public onCreateNewPanel(): number {
+    if (!this.state.isEditing) {
+      this.onEnterEditMode();
+    }
+
     const vizPanel = getDefaultVizPanel(this);
 
     this.addPanel(vizPanel);

public/app/features/dashboard-scene/scene/DashboardSceneRenderer.tsx

@@ -62,7 +62,10 @@ export function DashboardSceneRenderer({ model }: SceneComponentProps<DashboardS
             </div>
           )}
           <CustomScrollbar autoHeightMin={'100%'} className={styles.scrollbarContainer}>
-            <div className={styles.canvasContent}>{isEmpty ? emptyState : withPanels}</div>
+            <div className={styles.canvasContent}>
+              <>{isEmpty && emptyState}</>
+              {withPanels}
+            </div>
           </CustomScrollbar>
         </div>
       )}

public/app/features/dashboard-scene/serialization/transformSaveModelToScene.ts

@@ -26,7 +26,6 @@ import {
   UserActionEvent,
   GroupByVariable,
   AdHocFiltersVariable,
-  SceneFlexLayout,
 } from '@grafana/scenes';
 import { DashboardModel, PanelModel } from 'app/features/dashboard/state';
 import { trackDashboardLoaded } from 'app/features/dashboard/utils/tracking';
@@ -52,6 +51,7 @@ import { createPanelDataProvider } from '../utils/createPanelDataProvider';
 import { DashboardInteractions } from '../utils/interactions';
 import {
   getCurrentValueForOldIntervalModel,
+  getDashboardSceneFor,
   getIntervalsFromQueryString,
   getVizPanelKeyForPanelId,
 } from '../utils/utils';
@@ -285,6 +285,7 @@ export function createDashboardSceneFromDashboardModel(oldModel: DashboardModel)
     body: new SceneGridLayout({
       isLazy: true,
       children: createSceneObjectsForPanels(oldModel.panels),
+      $behaviors: [trackIfEmpty],
     }),
     $timeRange: new SceneTimeRange({
       from: oldModel.time.from,
@@ -303,7 +304,6 @@ export function createDashboardSceneFromDashboardModel(oldModel: DashboardModel)
       registerDashboardMacro,
       registerDashboardSceneTracking(oldModel),
       registerPanelInteractionsReporter,
-      trackIfIsEmpty,
       new behaviors.LiveNowTimer(oldModel.liveNow),
     ],
     $data: new DashboardDataLayerSet({ annotationLayers, alertStatesLayer }),
@@ -570,21 +570,6 @@ function registerPanelInteractionsReporter(scene: DashboardScene) {
   });
 }
 
-export function trackIfIsEmpty(parent: DashboardScene) {
-  updateIsEmpty(parent);
-
-  parent.state.body.subscribeToState(() => {
-    updateIsEmpty(parent);
-  });
-}
-
-function updateIsEmpty(parent: DashboardScene) {
-  const { body } = parent.state;
-  if (body instanceof SceneFlexLayout || body instanceof SceneGridLayout) {
-    parent.setState({ isEmpty: body.state.children.length === 0 });
-  }
-}
-
 const convertSnapshotData = (snapshotData: DataFrameDTO[]): DataFrameJSON[] => {
   return snapshotData.map((data) => {
     return {
@@ -619,3 +604,17 @@ export const convertOldSnapshotToScenesSnapshot = (panel: PanelModel) => {
     panel.snapshotData = [];
   }
 };
+
+function trackIfEmpty(grid: SceneGridLayout) {
+  getDashboardSceneFor(grid).setState({ isEmpty: grid.state.children.length === 0 });
+
+  const sub = grid.subscribeToState((n, p) => {
+    if (n.children.length !== p.children.length || n.children !== p.children) {
+      getDashboardSceneFor(grid).setState({ isEmpty: n.children.length === 0 });
+    }
+  });
+
+  return () => {
+    sub.unsubscribe();
+  };
+}

public/app/features/dashboard/dashgrid/DashboardEmpty.tsx

@@ -7,7 +7,11 @@ import { config, locationService } from '@grafana/runtime';
 import { Button, useStyles2, Text, Box, Stack } from '@grafana/ui';
 import { Trans } from 'app/core/internationalization';
 import { DashboardModel } from 'app/features/dashboard/state';
-import { onAddLibraryPanel, onCreateNewPanel, onImportDashboard } from 'app/features/dashboard/utils/dashboard';
+import {
+  onAddLibraryPanel as onAddLibraryPanelImpl,
+  onCreateNewPanel,
+  onImportDashboard,
+} from 'app/features/dashboard/utils/dashboard';
 import { DashboardScene } from 'app/features/dashboard-scene/scene/DashboardScene';
 import { DashboardInteractions } from 'app/features/dashboard-scene/utils/interactions';
 import { useDispatch, useSelector } from 'app/types';
@@ -37,6 +41,15 @@ const DashboardEmpty = ({ dashboard, canCreate }: Props) => {
     DashboardInteractions.emptyDashboardButtonClicked({ item: 'add_visualization' });
   };
 
+  const onAddLibraryPanel = () => {
+    DashboardInteractions.emptyDashboardButtonClicked({ item: 'import_from_library' });
+    if (dashboard instanceof DashboardScene) {
+      dashboard.onCreateLibPanelWidget();
+    } else {
+      onAddLibraryPanelImpl(dashboard);
+    }
+  };
+
   return (
     <Stack alignItems="center" justifyContent="center">
       <div className={styles.wrapper}>
@@ -110,14 +123,7 @@ const DashboardEmpty = ({ dashboard, canCreate }: Props) => {
                   icon="plus"
                   fill="outline"
                   data-testid={selectors.pages.AddDashboard.itemButton('Add a panel from the panel library button')}
-                  onClick={() => {
+                  onClick={onAddLibraryPanel}
-                    DashboardInteractions.emptyDashboardButtonClicked({ item: 'import_from_library' });
-                    if (dashboard instanceof DashboardScene) {
-                      dashboard.onCreateLibPanelWidget();
-                    } else {
-                      onAddLibraryPanel(dashboard);
-                    }
-                  }}
                   disabled={!canCreate}
                 >
                   <Trans i18nKey="dashboard.empty.add-library-panel-button">Add library panel</Trans>