PanelHeader: show streaming indicator (and allow unsubscribe) (#28682)

packages/grafana-ui/src/components/Tooltip/Tooltip.tsx

@@ -13,7 +13,7 @@ export interface PopoverContentProps {
 
 export type PopoverContent = string | React.ReactElement<any> | ((props: PopoverContentProps) => JSX.Element);
 
-export const Tooltip: FC<TooltipProps> = ({ children, theme, ...controllerProps }: TooltipProps) => {
+export const Tooltip: FC<TooltipProps> = React.memo(({ children, theme, ...controllerProps }: TooltipProps) => {
   const tooltipTriggerRef = createRef<PopperJS.ReferenceObject>();
   const popperBackgroundClassName = 'popper__background' + (theme ? ' popper__background--' + theme : '');
 
@@ -52,4 +52,4 @@ export const Tooltip: FC<TooltipProps> = ({ children, theme, ...controllerProps
       }}
     </PopoverController>
   );
-};
+});

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

@@ -1,9 +1,9 @@
-import React, { Component } from 'react';
+import React, { PureComponent } from 'react';
 import classNames from 'classnames';
 import { isEqual } from 'lodash';
 import { DataLink, LoadingState, PanelData, PanelMenuItem, QueryResultMetaNotice, ScopedVars } from '@grafana/data';
-import { AngularComponent, getTemplateSrv } from '@grafana/runtime';
-import { ClickOutsideWrapper, Icon, IconName, Tooltip } from '@grafana/ui';
+import { AngularComponent, config, getTemplateSrv } from '@grafana/runtime';
+import { ClickOutsideWrapper, Icon, IconName, Tooltip, stylesFactory } from '@grafana/ui';
 import { selectors } from '@grafana/e2e-selectors';
 
 import PanelHeaderCorner from './PanelHeaderCorner';
@@ -14,6 +14,7 @@ import { PanelModel } from 'app/features/dashboard/state/PanelModel';
 import { getPanelLinksSupplier } from 'app/features/panel/panellinks/linkSuppliers';
 import { getPanelMenu } from 'app/features/dashboard/utils/getPanelMenu';
 import { updateLocation } from 'app/core/actions';
+import { css } from 'emotion';
 
 export interface Props {
   panel: PanelModel;
@@ -41,7 +42,7 @@ interface State {
   menuItems: PanelMenuItem[];
 }
 
-export class PanelHeader extends Component<Props, State> {
+export class PanelHeader extends PureComponent<Props, State> {
   clickCoordinates: ClickCoordinates = { x: 0, y: 0 };
 
   state: State = {
@@ -90,14 +91,28 @@ export class PanelHeader extends Component<Props, State> {
     this.props.panel.getQueryRunner().cancelQuery();
   };
 
-  private renderLoadingState(): JSX.Element {
-    return (
-      <div className="panel-loading" onClick={this.onCancelQuery}>
-        <Tooltip content="Cancel query">
-          <Icon className="panel-loading__spinner spin-clockwise" name="sync" />
-        </Tooltip>
-      </div>
-    );
+  renderLoadingState(state: LoadingState): JSX.Element | null {
+    if (state === LoadingState.Loading) {
+      return (
+        <div className="panel-loading" onClick={this.onCancelQuery}>
+          <Tooltip content="Cancel query">
+            <Icon className="panel-loading__spinner spin-clockwise" name="sync" />
+          </Tooltip>
+        </div>
+      );
+    }
+
+    if (state === LoadingState.Streaming) {
+      const styles = getStyles();
+
+      return (
+        <div className="panel-loading" onClick={this.onCancelQuery}>
+          <div title="Streaming (click to stop)" className={styles.streamIndicator} />
+        </div>
+      );
+    }
+
+    return null;
   }
 
   openInspect = (e: React.SyntheticEvent, tab: string) => {
@@ -156,7 +171,7 @@ export class PanelHeader extends Component<Props, State> {
 
     return (
       <>
-        {data.state === LoadingState.Loading && this.renderLoadingState()}
+        {this.renderLoadingState(data.state)}
         <div className={panelHeaderClass}>
           <PanelHeaderCorner
             panel={panel}
@@ -201,3 +216,21 @@ export class PanelHeader extends Component<Props, State> {
     );
   }
 }
+
+/*
+ * Styles
+ */
+export const getStyles = stylesFactory(() => {
+  return {
+    streamIndicator: css`
+      width: 10px;
+      height: 10px;
+      background: ${config.theme.colors.textFaint};
+      box-shadow: 0 0 2px ${config.theme.colors.textFaint};
+      border-radius: 50%;
+      position: relative;
+      top: 6px;
+      right: 1px;
+    `,
+  };
+});

public/app/features/teams/__snapshots__/TeamGroupSync.test.tsx.snap

@@ -10,7 +10,7 @@ exports[`Render should render component 1`] = `
     >
       External group sync
     </h3>
-    <Component
+    <Memo()
       content="Sync LDAP or OAuth groups with your Grafana teams."
       placement="auto"
     >
@@ -18,7 +18,7 @@ exports[`Render should render component 1`] = `
         className="icon--has-hover page-sub-heading-icon"
         name="question-circle"
       />
-    </Component>
+    </Memo()>
     <div
       className="page-action-bar__spacer"
     />
@@ -92,7 +92,7 @@ exports[`Render should render groups table 1`] = `
     >
       External group sync
     </h3>
-    <Component
+    <Memo()
       content="Sync LDAP or OAuth groups with your Grafana teams."
       placement="auto"
     >
@@ -100,7 +100,7 @@ exports[`Render should render groups table 1`] = `
         className="icon--has-hover page-sub-heading-icon"
         name="question-circle"
       />
-    </Component>
+    </Memo()>
     <div
       className="page-action-bar__spacer"
     />

public/app/plugins/datasource/testdata/runStreams.ts

@@ -98,6 +98,7 @@ export function runSignalStream(
       subscriber.next({
         data: [data],
         key: streamId,
+        state: LoadingState.Streaming,
       });
 
       timeoutId = setTimeout(pushNextEvent, speed);