UI: Segment Input (#20904)

* Add input segment

* Rename story

* Cleanup

* Fix lint error

* More cleanup

* Export ui component

* Use measure text util

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

@@ -4,6 +4,8 @@ import { SelectableValue } from '@grafana/data';
 import { SegmentSelect, useExpandableLabel, SegmentProps } from './';
 
 export interface SegmentSyncProps<T> extends SegmentProps<T> {
+  value?: SelectableValue<T>;
+  onChange: (item: SelectableValue<T>) => void;
   options: Array<SelectableValue<T>>;
 }
 

packages/grafana-ui/src/components/Segment/SegmentAsync.tsx

@@ -5,7 +5,9 @@ import { SelectableValue } from '@grafana/data';
 import { useExpandableLabel, SegmentProps } from '.';
 
 export interface SegmentAsyncProps<T> extends SegmentProps<T> {
+  value?: SelectableValue<T>;
   loadOptions: (query?: string) => Promise<Array<SelectableValue<T>>>;
+  onChange: (item: SelectableValue<T>) => void;
 }
 
 export function SegmentAsync<T>({

packages/grafana-ui/src/components/Segment/SegmentInput.story.tsx

+import React from 'react';
+import { storiesOf } from '@storybook/react';
+import { action } from '@storybook/addon-actions';
+const SegmentStories = storiesOf('UI/Segment/SegmentInput', module);
+import { SegmentInput } from '.';
+import { UseState } from '../../utils/storybook/UseState';
+
+SegmentStories.add('Segment Input', () => {
+  return (
+    <UseState initialState={'some text'}>
+      {(value, updateValue) => (
+        <>
+          <div className="gf-form-inline">
+            <div className="gf-form">
+              <span className="gf-form-label width-8 query-keyword">Segment Name</span>
+            </div>
+            <SegmentInput
+              value={value}
+              onChange={text => {
+                updateValue(text as string);
+                action('Segment value changed')(text);
+              }}
+            />
+          </div>
+        </>
+      )}
+    </UseState>
+  );
+});

packages/grafana-ui/src/components/Segment/SegmentInput.tsx

+import React, { useRef, useState } from 'react';
+import { cx, css } from 'emotion';
+import useClickAway from 'react-use/lib/useClickAway';
+import { measureText } from '../../utils/measureText';
+import { useExpandableLabel, SegmentProps } from '.';
+
+export interface SegmentInputProps<T> extends SegmentProps<T> {
+  value: string | number;
+  onChange: (text: string | number) => void;
+}
+
+const FONT_SIZE = 14;
+
+export function SegmentInput<T>({
+  value,
+  onChange,
+  Component,
+  className,
+}: React.PropsWithChildren<SegmentInputProps<T>>) {
+  const ref = useRef(null);
+  const [inputWidth, setInputWidth] = useState<number>(measureText(value.toString(), FONT_SIZE).width);
+  const [Label, , expanded, setExpanded] = useExpandableLabel(false);
+  useClickAway(ref, () => setExpanded(false));
+
+  if (!expanded) {
+    return <Label Component={Component || <a className={cx('gf-form-label', 'query-part', className)}>{value}</a>} />;
+  }
+
+  const inputWidthStyle = css`
+    width: ${Math.max(inputWidth + 20, 32)}px;
+  `;
+
+  return (
+    <input
+      ref={ref}
+      autoFocus
+      className={cx(`gf-form gf-form-input`, inputWidthStyle)}
+      value={value}
+      onChange={item => {
+        const { width } = measureText(item.target.value, FONT_SIZE);
+        setInputWidth(width);
+        onChange(item.target.value);
+      }}
+      onBlur={() => setExpanded(false)}
+      onKeyDown={e => [13, 27].includes(e.keyCode) && setExpanded(false)}
+    />
+  );
+}

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

 export { Segment } from './Segment';
 export { SegmentAsync } from './SegmentAsync';
 export { SegmentSelect } from './SegmentSelect';
+export { SegmentInput } from './SegmentInput';
 export { SegmentProps } from './types';
 export { useExpandableLabel } from './useExpandableLabel';

packages/grafana-ui/src/components/Segment/types.ts

 import { ReactElement } from 'react';
-import { SelectableValue } from '@grafana/data';
 
 export interface SegmentProps<T> {
-  onChange: (item: SelectableValue<T>) => void;
-  value?: SelectableValue<T>;
   Component?: ReactElement;
   className?: string;
   allowCustomValue?: boolean;

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

@@ -105,7 +105,7 @@ export { DataSourceHttpSettings } from './DataSourceSettings/DataSourceHttpSetti
 export { Spinner } from './Spinner/Spinner';
 export { FadeTransition } from './transitions/FadeTransition';
 export { SlideOutTransition } from './transitions/SlideOutTransition';
-export { Segment, SegmentAsync, SegmentSelect } from './Segment/';
+export { Segment, SegmentAsync, SegmentInput, SegmentSelect } from './Segment/';
 export { default as Chart } from './Chart';
 export { Icon } from './Icon/Icon';