Add keyboard navigation to datasource picker via a hoc.

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

 import React, { PureComponent } from 'react';
 import classNames from 'classnames';
 import _ from 'lodash';
-
+import withKeyboardNavigation from './withKeyboardNavigation';
 import { DataSourceSelectItem } from 'app/types';
 
-interface Props {
+export interface Props {
   onChangeDataSource: (ds: any) => void;
   datasources: DataSourceSelectItem[];
+  selected?: number;
+  onKeyDown?: (evt: any, maxSelectedIndex: number, onEnterAction: () => void) => void;
+  onMouseEnter?: (select: number) => void;
 }
 
 interface State {
   searchQuery: string;
 }
 
-export class DataSourcePicker extends PureComponent<Props, State> {
+export const DataSourcePicker = withKeyboardNavigation(
+  class DataSourcePicker extends PureComponent<Props, State> {
     searchInput: HTMLElement;
 
     constructor(props) {
@@ -35,15 +39,27 @@ export class DataSourcePicker extends PureComponent<Props, State> {
       return filtered;
     }
 
+    get maxSelectedIndex() {
+      const filtered = this.getDataSources();
+      return filtered.length - 1;
+    }
+
     renderDataSource = (ds: DataSourceSelectItem, index: number) => {
-    const { onChangeDataSource } = this.props;
+      const { onChangeDataSource, selected, onMouseEnter } = this.props;
       const onClick = () => onChangeDataSource(ds);
+      const isSelected = selected === index;
       const cssClass = classNames({
         'ds-picker-list__item': true,
+        'ds-picker-list__item--selected': isSelected,
       });
-
       return (
-      <div key={index} className={cssClass} title={ds.name} onClick={onClick}>
+        <div
+          key={index}
+          className={cssClass}
+          title={ds.name}
+          onClick={onClick}
+          onMouseEnter={() => onMouseEnter(index)}
+        >
           <img className="ds-picker-list__img" src={ds.meta.info.logos.small} />
           <div className="ds-picker-list__name">{ds.name}</div>
         </div>
@@ -66,6 +82,7 @@ export class DataSourcePicker extends PureComponent<Props, State> {
 
     renderFilters() {
       const { searchQuery } = this.state;
+      const { onKeyDown } = this.props;
       return (
         <>
           <label className="gf-form--has-input-icon">
@@ -76,6 +93,13 @@ export class DataSourcePicker extends PureComponent<Props, State> {
               ref={elem => (this.searchInput = elem)}
               onChange={this.onSearchQueryChange}
               value={searchQuery}
+              onKeyDown={evt => {
+                onKeyDown(evt, this.maxSelectedIndex, () => {
+                  const { onChangeDataSource, selected } = this.props;
+                  const ds = this.getDataSources()[selected];
+                  onChangeDataSource(ds);
+                });
+              }}
             />
             <i className="gf-form-input-icon fa fa-search" />
           </label>
@@ -94,4 +118,7 @@ export class DataSourcePicker extends PureComponent<Props, State> {
         </>
       );
     }
-}
+  }
+);
+
+export default DataSourcePicker;

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

+import React from 'react';
+import { Props } from './DataSourcePicker';
+
+interface State {
+  selected: number;
+}
+
+const withKeyboardNavigation = WrappedComponent => {
+  return class extends React.Component<Props, State> {
+    constructor(props) {
+      super(props);
+
+      this.state = {
+        selected: 0,
+      };
+    }
+
+    goToNext = (maxSelectedIndex: number) => {
+      const nextIndex = this.state.selected >= maxSelectedIndex ? 0 : this.state.selected + 1;
+      this.setState({
+        selected: nextIndex,
+      });
+    };
+
+    goToPrev = (maxSelectedIndex: number) => {
+      const nextIndex = this.state.selected <= 0 ? maxSelectedIndex : this.state.selected - 1;
+      this.setState({
+        selected: nextIndex,
+      });
+    };
+
+    onKeyDown = (evt: KeyboardEvent, maxSelectedIndex: number, onEnterAction: any) => {
+      if (evt.key === 'ArrowDown') {
+        evt.preventDefault();
+        this.goToNext(maxSelectedIndex);
+      }
+      if (evt.key === 'ArrowUp') {
+        evt.preventDefault();
+        this.goToPrev(maxSelectedIndex);
+      }
+      if (evt.key === 'Enter' && onEnterAction) {
+        onEnterAction();
+      }
+    };
+
+    onMouseEnter = (mouseEnterIndex: number) => {
+      this.setState({
+        selected: mouseEnterIndex,
+      });
+    };
+
+    render() {
+      return (
+        <WrappedComponent
+          selected={this.state.selected}
+          onKeyDown={this.onKeyDown}
+          onMouseEnter={this.onMouseEnter}
+          {...this.props}
+        />
+      );
+    }
+  };
+};
+
+export default withKeyboardNavigation;

public/sass/components/_panel_editor.scss

@@ -257,13 +257,13 @@
   align-items: center;
   height: 44px;
 
-  &:hover {
+  &--selected {
     background: $panel-editor-viz-item-bg-hover;
     border: $panel-editor-viz-item-border-hover;
     box-shadow: $panel-editor-viz-item-shadow-hover;
   }
 
-  &--selected {
+  &--active {
     box-shadow: 0 0 6px $orange;
     border: 1px solid $orange;