@grafana/data#VAR_CALC TypeScript Examples

The following examples show how to use @grafana/data#VAR_CALC. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: FieldPropertiesEditor.tsx    From grafana-chinese with Apache License 2.0 4 votes vote down vote up 
FieldPropertiesEditor: React.FC<Props> = ({ value, onChange, showMinMax, showTitle }) => {
  const { unit, title } = value;

  const [decimals, setDecimals] = useState(
    value.decimals !== undefined && value.decimals !== null ? value.decimals.toString() : ''
  );
  const [min, setMin] = useState(toNumberString(value.min));
  const [max, setMax] = useState(toNumberString(value.max));

  const onTitleChange = (event: ChangeEvent<HTMLInputElement>) => {
    onChange({ ...value, title: event.target.value });
  };

  const onDecimalChange = useCallback(
    (event: ChangeEvent<HTMLInputElement>) => {
      setDecimals(event.target.value);
    },
    [value.decimals, onChange]
  );

  const onMinChange = useCallback(
    (event: ChangeEvent<HTMLInputElement>) => {
      setMin(event.target.value);
    },
    [value.min, onChange]
  );

  const onMaxChange = useCallback(
    (event: ChangeEvent<HTMLInputElement>) => {
      setMax(event.target.value);
    },
    [value.max, onChange]
  );

  const onUnitChange = (unit?: string) => {
    onChange({ ...value, unit });
  };

  const commitChanges = useCallback(() => {
    onChange({
      ...value,
      decimals: toIntegerOrUndefined(decimals),
      min: toFloatOrUndefined(min),
      max: toFloatOrUndefined(max),
    });
  }, [min, max, decimals, value]);

  const titleTooltip = (
    <div>
      Template Variables:
      <br />
      {'${' + VAR_SERIES_NAME + '}'}
      <br />
      {'${' + VAR_FIELD_NAME + '}'}
      <br />
      {'$' + VAR_CELL_PREFIX + '{N}'} / {'$' + VAR_CALC}
    </div>
  );

  return (
    <>
      {showTitle && (
        <FormField
          label="Title"
          labelWidth={labelWidth}
          onChange={onTitleChange}
          value={title}
          tooltip={titleTooltip}
          placeholder="Auto"
          aria-label="Field properties editor title input"
        />
      )}

      <div className="gf-form">
        <FormLabel width={labelWidth}>Unit</FormLabel>
        <UnitPicker value={unit} onChange={onUnitChange} />
      </div>
      {showMinMax && (
        <>
          <FormField
            label="Min"
            labelWidth={labelWidth}
            onChange={onMinChange}
            onBlur={commitChanges}
            value={min}
            placeholder="Auto"
            type="number"
            aria-label="Field properties editor min input"
          />
          <FormField
            label="Max"
            labelWidth={labelWidth}
            onChange={onMaxChange}
            onBlur={commitChanges}
            value={max}
            type="number"
            placeholder="Auto"
            aria-label="Field properties editor max input"
          />
        </>
      )}
      <FormField
        label="Decimals"
        labelWidth={labelWidth}
        placeholder="auto"
        onChange={onDecimalChange}
        onBlur={commitChanges}
        value={decimals}
        type="number"
      />
    </>
  );
}