Dropdown: New dropdown component (#52684)

* Progress

* Example usage in application

* Add FocusScope

* REmove unused type

* simplify it by removing trigger property

* Use new Menu.Item way to access component

packages/grafana-ui/src/components/Dropdown/Dropdown.mdx

@@ -0,0 +1,35 @@
+import { Meta, Props } from '@storybook/addon-docs/blocks';
+
+import { Dropdown } from './Dropdown';
+
+<Meta title="MDX|Dropdown" component={Dropdown} />
+
+# Dropdown
+
+Hook up a menu or other overlay to any trigger.
+
+### When to use
+
+When you want a button, link or icon button to open a Menu or Popover. By default the trigger is click but it can be changed to show on hover using the
+trigger property.
+
+### Usage
+
+```tsx
+import { Dropdown, Menu, Button } from '@grafana/ui';
+
+const menu = (
+  <Menu>
+    <Menu.Item label="Google" />
+    <Menu.Item label="Filter" />
+  </Menu>
+);
+
+return (
+  <Dropdown overlay={menu}>
+    <Button icon="bars" />
+  </Dropdown>
+);
+```
+
+<Props of={Dropdown} />

packages/grafana-ui/src/components/Dropdown/Dropdown.story.tsx

@@ -0,0 +1,60 @@
+import { ComponentMeta } from '@storybook/react';
+import React from 'react';
+
+import { StoryExample } from '../../utils/storybook/StoryExample';
+import { withCenteredStory } from '../../utils/storybook/withCenteredStory';
+import { Button } from '../Button';
+import { VerticalGroup } from '../Layout/Layout';
+import { Menu } from '../Menu/Menu';
+
+import { Dropdown } from './Dropdown';
+import mdx from './Dropdown.mdx';
+
+const meta: ComponentMeta<typeof Dropdown> = {
+  title: 'Overlays/Dropdown',
+  component: Dropdown,
+  decorators: [withCenteredStory],
+  parameters: {
+    docs: {
+      page: mdx,
+    },
+    controls: {
+      exclude: ['className'],
+    },
+  },
+};
+
+export function Examples() {
+  const menu = (
+    <Menu>
+      <Menu.Item label="View settings" tabIndex={0} />
+      <Menu.Item label="Edit actions" tabIndex={1} />
+      <Menu.Item label="Share" tabIndex={2} />
+      <Menu.Item label="Delete" tabIndex={3} />
+    </Menu>
+  );
+
+  return (
+    <VerticalGroup>
+      <StoryExample name="Button + defaults">
+        <Dropdown overlay={menu}>
+          <Button variant="secondary">Button</Button>
+        </Dropdown>
+      </StoryExample>
+      <StoryExample name="Icon button, placement=bottom-start">
+        <Dropdown overlay={menu} placement="bottom-start">
+          <Button variant="secondary" icon="bars" />
+        </Dropdown>
+      </StoryExample>
+    </VerticalGroup>
+  );
+}
+
+Examples.parameters = {
+  controls: {
+    hideNoControlsWarning: true,
+    include: [],
+  },
+};
+
+export default meta;

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

@@ -0,0 +1,81 @@
+import { css } from '@emotion/css';
+import { FocusScope } from '@react-aria/focus';
+import React, { useState } from 'react';
+import { usePopperTooltip } from 'react-popper-tooltip';
+import { CSSTransition } from 'react-transition-group';
+
+import { ReactUtils } from '../../utils';
+import { Portal } from '../Portal/Portal';
+import { TooltipPlacement } from '../Tooltip/types';
+
+export interface Props {
+  overlay: React.ReactElement | (() => React.ReactElement);
+  placement?: TooltipPlacement;
+  children: React.ReactElement;
+}
+
+export const Dropdown = React.memo(({ children, overlay, placement }: Props) => {
+  const [show, setShow] = useState(false);
+
+  const { getArrowProps, getTooltipProps, setTooltipRef, setTriggerRef, visible } = usePopperTooltip({
+    visible: show,
+    placement: placement,
+    onVisibleChange: setShow,
+    interactive: true,
+    delayHide: 0,
+    delayShow: 0,
+    offset: [0, 8],
+    trigger: ['click'],
+  });
+
+  const animationDuration = 150;
+  const animationStyles = getStyles(animationDuration);
+
+  const onOverlayClicked = () => {
+    setShow(false);
+  };
+
+  return (
+    <>
+      {React.cloneElement(children, {
+        ref: setTriggerRef,
+      })}
+      {visible && (
+        <Portal>
+          <FocusScope autoFocus>
+            <div ref={setTooltipRef} {...getTooltipProps()} onClick={onOverlayClicked}>
+              <div {...getArrowProps({ className: 'tooltip-arrow' })} />
+              <CSSTransition
+                appear={true}
+                in={true}
+                timeout={{ appear: animationDuration, exit: 0, enter: 0 }}
+                classNames={animationStyles}
+              >
+                {ReactUtils.renderOrCallToRender(overlay)}
+              </CSSTransition>
+            </div>
+          </FocusScope>
+        </Portal>
+      )}
+    </>
+  );
+});
+
+Dropdown.displayName = 'Dropdown';
+
+const getStyles = (duration: number) => {
+  return {
+    appear: css`
+      opacity: 0;
+      position: relative;
+      transform: scaleY(0.5);
+      transform-origin: top;
+    `,
+    appearActive: css`
+      opacity: 1;
+      transform: scaleY(1);
+      transition: transform ${duration}ms cubic-bezier(0.2, 0, 0.2, 1),
+        opacity ${duration}ms cubic-bezier(0.2, 0, 0.2, 1);
+    `,
+  };
+};

packages/grafana-ui/src/components/index.ts

@@ -228,6 +228,7 @@ export { Card, Props as CardProps, getCardStyles } from './Card/Card';
 export { CardContainer, CardContainerProps } from './Card/CardContainer';
 export { FormattedValueDisplay } from './FormattedValueDisplay/FormattedValueDisplay';
 export { ButtonSelect } from './Dropdown/ButtonSelect';
+export { Dropdown } from './Dropdown/Dropdown';
 export { PluginSignatureBadge, PluginSignatureBadgeProps } from './PluginSignatureBadge/PluginSignatureBadge';
 
 // Export this until we've figured out a good approach to inline form styles.

public/app/core/components/AppChrome/TopSearchBar.tsx

@@ -2,7 +2,7 @@ import { css } from '@emotion/css';
 import React from 'react';
 
 import { GrafanaTheme2 } from '@grafana/data';
-import { FilterInput, Icon, Tooltip, useStyles2 } from '@grafana/ui';
+import { Dropdown, FilterInput, Icon, Menu, MenuItem, Tooltip, useStyles2 } from '@grafana/ui';
 import { contextSrv } from 'app/core/core';
 
 import { TOP_BAR_LEVEL_HEIGHT } from './types';
@@ -36,15 +36,30 @@ export function TopSearchBar() {
           </button>
         </Tooltip>
         <Tooltip placement="bottom" content="User profile (todo)">
-          <button className={styles.actionItem}>
-            <img src={contextSrv.user.gravatarUrl} />
-          </button>
+          <Dropdown overlay={ProfileMenu}>
+            <button className={styles.actionItem}>
+              <img src={contextSrv.user.gravatarUrl} />
+            </button>
+          </Dropdown>
         </Tooltip>
       </div>
     </div>
   );
 }
 
+/**
+ * This is just temporary, needs syncing with the backend option like DisableSignoutMenu
+ */
+export function ProfileMenu() {
+  return (
+    <Menu>
+      <MenuItem url="profile" label="Your profile" />
+      <MenuItem url="profile/notifications" label="Your notifications" />
+      <MenuItem url="logout" label="Sign out" />
+    </Menu>
+  );
+}
+
 const getStyles = (theme: GrafanaTheme2) => {
   return {
     searchBar: css({