feat(tooltip): series tick formatters

api/charts.api.md

@@ -138,7 +138,7 @@ export interface AxisSpec extends Spec {
     // (undocumented)
     specType: typeof SpecTypes.Axis;
     style?: RecursivePartial<Omit<AxisStyle, 'gridLine'>>;
-    tickFormat: TickFormatter;
+    tickFormat?: TickFormatter;
     ticks?: number;
     title?: string;
 }
@@ -1262,6 +1262,7 @@ export interface SeriesSpec extends Spec {
     sortIndex?: number;
     // (undocumented)
     specType: typeof SpecTypes.Series;
+    tickFormat?: TickFormatter;
     useDefaultGroupDomain?: boolean;
     // Warning: (ae-forgotten-export) The symbol "AccessorFormat" needs to be exported by the entry point index.d.ts
     y0AccessorFormat?: AccessorFormat;

integration/tests/interactions.test.ts

@@ -228,4 +228,34 @@ describe('Interactions', () => {
       );
     });
   });
+
+  describe('Tooltip formatting', () => {
+    it('should use all custom tick formatters', async () => {
+      await common.expectChartWithMouseAtUrlToMatchScreenshot(
+        'http://localhost:9001/?path=/story/axes--different-tooltip-formatter&knob-Show%20legend=true&knob-Disable%20Y%20Axis%20tickFormat=&knob-Y%20Axis%20value%20format=0[.]0&knob-Y%20Axis%20unit=pets&knob-Disable%20dog%20line%20tickFormat=&knob-Dog%20line%20unit=dogs&knob-Disable%20cat%20line%20tickFormat=&knob-Cat%20line%20unit=cats',
+        { left: 280, top: 80 },
+      );
+    });
+
+    it('should use series tick formatter with no axis tick formatter', async () => {
+      await common.expectChartWithMouseAtUrlToMatchScreenshot(
+        'http://localhost:9001/?path=/story/axes--different-tooltip-formatter&knob-Show%20legend=true&knob-Disable%20Y%20Axis%20tickFormat=&knob-Y%20Axis%20value%20format=0[.]0&knob-Y%20Axis%20unit=pets&knob-Disable%20dog%20line%20tickFormat=&knob-Dog%20line%20unit=dogs&knob-Disable%20cat%20line%20tickFormat=&knob-Cat%20line%20unit=cats',
+        { left: 280, top: 80 },
+      );
+    });
+
+    it('should use series tick formatter with no axis tick formatter, missing series tick formatter', async () => {
+      await common.expectChartWithMouseAtUrlToMatchScreenshot(
+        'http://localhost:9001/?path=/story/axes--different-tooltip-formatter&knob-Show%20legend=true&knob-Disable%20Y%20Axis%20tickFormat=true&knob-Y%20Axis%20value%20format=0[.]0&knob-Y%20Axis%20unit=pets&knob-Disable%20dog%20line%20tickFormat=true&knob-Dog%20line%20unit=dogs&knob-Disable%20cat%20line%20tickFormat=&knob-Cat%20line%20unit=cats',
+        { left: 280, top: 80 },
+      );
+    });
+
+    it('should use default tick formatter with no axis tick formatter, nor series tick formatter', async () => {
+      await common.expectChartWithMouseAtUrlToMatchScreenshot(
+        'http://localhost:9001/?path=/story/axes--different-tooltip-formatter&knob-Show%20legend=true&knob-Disable%20Y%20Axis%20tickFormat=true&knob-Y%20Axis%20value%20format=0[.]0&knob-Y%20Axis%20unit=pets&knob-Disable%20dog%20line%20tickFormat=true&knob-Dog%20line%20unit=dogs&knob-Disable%20cat%20line%20tickFormat=true&knob-Cat%20line%20unit=cats',
+        { left: 280, top: 80 },
+      );
+    });
+  });
 });

src/chart_types/xy_chart/legend/legend.ts

@@ -19,10 +19,11 @@
 
 import { LegendItem } from '../../../commons/legend';
 import { SeriesKey, SeriesIdentifier } from '../../../commons/series_id';
-import { identity, Color } from '../../../utils/commons';
+import { Color } from '../../../utils/commons';
 import { BandedAccessorType } from '../../../utils/geometry';
 import { getAxesSpecForSpecId, getSpecsById } from '../state/utils/spec';
 import { Y0_ACCESSOR_POSTFIX, Y1_ACCESSOR_POSTFIX } from '../tooltip/tooltip';
+import { defaultTickFormatter } from '../utils/axis_utils';
 import {
   SeriesCollectionValue,
   getSeriesIndex,
@@ -66,6 +67,7 @@ export function computeLegend(
 ): LegendItem[] {
   const legendItems: LegendItem[] = [];
   const sortedCollection = getSortedDataSeriesColorsValuesMap(seriesCollection);
+  const fallbackTickFormatter = specs.find(({ tickFormat }) => tickFormat)?.tickFormat ?? defaultTickFormatter;
 
   sortedCollection.forEach((series, key) => {
     const { banded, lastValue, seriesIdentifier } = series;
@@ -83,7 +85,7 @@ export function computeLegend(
 
     // Use this to get axis spec w/ tick formatter
     const { yAxis } = getAxesSpecForSpecId(axesSpecs, spec.groupId);
-    const formatter = yAxis ? yAxis.tickFormat : identity;
+    const formatter = yAxis?.tickFormat ?? fallbackTickFormatter;
     const { hideInLegend } = spec;
 
     legendItems.push({

src/chart_types/xy_chart/specs/axis.tsx

@@ -33,15 +33,13 @@ const defaultProps = {
   showOverlappingTicks: false,
   showOverlappingLabels: false,
   position: Position.Left,
-  tickFormat: (tick: any) => `${tick}`,
 };
 
 type SpecRequired = Pick<AxisSpec, 'id'>;
 type SpecOptionals = Partial<Omit<AxisSpec, 'chartType' | 'specType' | 'seriesType' | 'id'>>;
 
 export const Axis: React.FunctionComponent<SpecRequired & SpecOptionals> = getConnect()(
-  specComponentFactory<
-    AxisSpec,
-    'groupId' | 'hide' | 'showOverlappingTicks' | 'showOverlappingLabels' | 'position' | 'tickFormat'
-  >(defaultProps),
+  specComponentFactory<AxisSpec, 'groupId' | 'hide' | 'showOverlappingTicks' | 'showOverlappingLabels' | 'position'>(
+    defaultProps,
+  ),
 );

src/chart_types/xy_chart/state/chart_state.timescales.test.ts

@@ -91,18 +91,18 @@ describe('Render chart', () => {
       store.dispatch(onPointerMove({ x: 15, y: 10 }, 0)); // check first valid tooltip
       let tooltip = getTooltipInfoSelector(store.getState());
       expect(tooltip.values.length).toBe(1);
-      expect(tooltip.header?.value).toBe(day1);
-      expect(tooltip.values[0].value).toBe(10);
+      expect(tooltip.header?.value).toBe(`${day1}`);
+      expect(tooltip.values[0].value).toBe(`${10}`);
       store.dispatch(onPointerMove({ x: 35, y: 10 }, 1)); // check second valid tooltip
       tooltip = getTooltipInfoSelector(store.getState());
       expect(tooltip.values.length).toBe(1);
-      expect(tooltip.header?.value).toBe(day2);
-      expect(tooltip.values[0].value).toBe(22);
+      expect(tooltip.header?.value).toBe(`${day2}`);
+      expect(tooltip.values[0].value).toBe(`${22}`);
       store.dispatch(onPointerMove({ x: 76, y: 10 }, 2)); // check third valid tooltip
       tooltip = getTooltipInfoSelector(store.getState());
       expect(tooltip.values.length).toBe(1);
-      expect(tooltip.header?.value).toBe(day3);
-      expect(tooltip.values[0].value).toBe(6);
+      expect(tooltip.header?.value).toBe(`${day3}`);
+      expect(tooltip.values[0].value).toBe(`${6}`);
     });
   });
   describe('line, utc-time, 5m interval', () => {
@@ -159,18 +159,18 @@ describe('Render chart', () => {
       store.dispatch(onPointerMove({ x: 15, y: 10 }, 0)); // check first valid tooltip
       let tooltip = getTooltipInfoSelector(store.getState());
       expect(tooltip.values.length).toBe(1);
-      expect(tooltip.header?.value).toBe(date1);
-      expect(tooltip.values[0].value).toBe(10);
+      expect(tooltip.header?.value).toBe(`${date1}`);
+      expect(tooltip.values[0].value).toBe(`${10}`);
       store.dispatch(onPointerMove({ x: 35, y: 10 }, 1)); // check second valid tooltip
       tooltip = getTooltipInfoSelector(store.getState());
       expect(tooltip.values.length).toBe(1);
-      expect(tooltip.header?.value).toBe(date2);
-      expect(tooltip.values[0].value).toBe(22);
+      expect(tooltip.header?.value).toBe(`${date2}`);
+      expect(tooltip.values[0].value).toBe(`${22}`);
       store.dispatch(onPointerMove({ x: 76, y: 10 }, 2)); // check third valid tooltip
       tooltip = getTooltipInfoSelector(store.getState());
       expect(tooltip.values.length).toBe(1);
-      expect(tooltip.header?.value).toBe(date3);
-      expect(tooltip.values[0].value).toBe(6);
+      expect(tooltip.header?.value).toBe(`${date3}`);
+      expect(tooltip.values[0].value).toBe(`${6}`);
     });
   });
   describe('line, non utc-time, 5m + 1s interval', () => {
@@ -245,18 +245,18 @@ describe('Render chart', () => {
       store.dispatch(onPointerMove({ x: 15, y: 10 }, 0)); // check first valid tooltip
       let tooltip = getTooltipInfoSelector(store.getState());
       expect(tooltip.values.length).toBe(1);
-      expect(tooltip.header?.value).toBe(date1);
-      expect(tooltip.values[0].value).toBe(10);
+      expect(tooltip.header?.value).toBe(`${date1}`);
+      expect(tooltip.values[0].value).toBe(`${10}`);
       store.dispatch(onPointerMove({ x: 35, y: 10 }, 1)); // check second valid tooltip
       tooltip = getTooltipInfoSelector(store.getState());
       expect(tooltip.values.length).toBe(1);
-      expect(tooltip.header?.value).toBe(date2);
-      expect(tooltip.values[0].value).toBe(22);
+      expect(tooltip.header?.value).toBe(`${date2}`);
+      expect(tooltip.values[0].value).toBe(`${22}`);
       store.dispatch(onPointerMove({ x: 76, y: 10 }, 2)); // check third valid tooltip
       tooltip = getTooltipInfoSelector(store.getState());
       expect(tooltip.values.length).toBe(1);
-      expect(tooltip.header?.value).toBe(date3);
-      expect(tooltip.values[0].value).toBe(6);
+      expect(tooltip.header?.value).toBe(`${date3}`);
+      expect(tooltip.values[0].value).toBe(`${6}`);
     });
   });
 });

src/chart_types/xy_chart/state/selectors/compute_axis_ticks_dimensions.ts

@@ -24,11 +24,16 @@ import { getChartThemeSelector } from '../../../../state/selectors/get_chart_the
 import { getSettingsSpecSelector } from '../../../../state/selectors/get_settings_specs';
 import { CanvasTextBBoxCalculator } from '../../../../utils/bbox/canvas_text_bbox_calculator';
 import { AxisId } from '../../../../utils/ids';
-import { computeAxisTicksDimensions, AxisTicksDimensions, isDuplicateAxis } from '../../utils/axis_utils';
+import {
+  computeAxisTicksDimensions,
+  AxisTicksDimensions,
+  isDuplicateAxis,
+  defaultTickFormatter,
+} from '../../utils/axis_utils';
 import { computeSeriesDomainsSelector } from './compute_series_domains';
 import { countBarsInClusterSelector } from './count_bars_in_cluster';
 import { getBarPaddingsSelector } from './get_bar_paddings';
-import { getAxisSpecsSelector } from './get_specs';
+import { getAxisSpecsSelector, getSeriesSpecsSelector } from './get_specs';
 import { isHistogramModeEnabledSelector } from './is_histogram_mode_enabled';
 
 /** @internal */
@@ -41,6 +46,7 @@ export const computeAxisTicksDimensionsSelector = createCachedSelector(
     getSettingsSpecSelector,
     computeSeriesDomainsSelector,
     countBarsInClusterSelector,
+    getSeriesSpecsSelector,
   ],
   (
     barsPadding,
@@ -50,9 +56,10 @@ export const computeAxisTicksDimensionsSelector = createCachedSelector(
     settingsSpec,
     seriesDomainsAndData,
     totalBarsInCluster,
+    seriesSpecs,
   ): Map<AxisId, AxisTicksDimensions> => {
     const { xDomain, yDomain } = seriesDomainsAndData;
-
+    const fallBackTickFormatter = seriesSpecs.find(({ tickFormat }) => tickFormat)?.tickFormat ?? defaultTickFormatter;
     const bboxCalculator = new CanvasTextBBoxCalculator();
     const axesTicksDimensions: Map<AxisId, AxisTicksDimensions> = new Map();
     axesSpecs.forEach((axisSpec) => {
@@ -65,6 +72,7 @@ export const computeAxisTicksDimensionsSelector = createCachedSelector(
         bboxCalculator,
         settingsSpec.rotation,
         chartTheme.axes,
+        fallBackTickFormatter,
         barsPadding,
         isHistogramMode,
       );

src/chart_types/xy_chart/state/selectors/compute_axis_visible_ticks.ts

@@ -24,14 +24,14 @@ import { getChartThemeSelector } from '../../../../state/selectors/get_chart_the
 import { getSettingsSpecSelector } from '../../../../state/selectors/get_settings_specs';
 import { Dimensions } from '../../../../utils/dimensions';
 import { AxisId } from '../../../../utils/ids';
-import { getAxisTicksPositions, AxisTick, AxisLinePosition } from '../../utils/axis_utils';
+import { getAxisTicksPositions, AxisTick, AxisLinePosition, defaultTickFormatter } from '../../utils/axis_utils';
 import { computeAxisTicksDimensionsSelector } from './compute_axis_ticks_dimensions';
 import { computeChartDimensionsSelector } from './compute_chart_dimensions';
 import { computeSeriesDomainsSelector } from './compute_series_domains';
 import { countBarsInClusterSelector } from './count_bars_in_cluster';
 import { getAxesStylesSelector } from './get_axis_styles';
 import { getBarPaddingsSelector } from './get_bar_paddings';
-import { getAxisSpecsSelector } from './get_specs';
+import { getAxisSpecsSelector, getSeriesSpecsSelector } from './get_specs';
 import { isHistogramModeEnabledSelector } from './is_histogram_mode_enabled';
 
 /** @internal */
@@ -54,6 +54,7 @@ export const computeAxisVisibleTicksSelector = createCachedSelector(
     countBarsInClusterSelector,
     isHistogramModeEnabledSelector,
     getBarPaddingsSelector,
+    getSeriesSpecsSelector,
   ],
   (
     chartDimensions,
@@ -66,7 +67,9 @@ export const computeAxisVisibleTicksSelector = createCachedSelector(
     totalBarsInCluster,
     isHistogramMode,
     barsPadding,
+    seriesSpecs,
   ): AxisVisibleTicks => {
+    const fallBackTickFormatter = seriesSpecs.find(({ tickFormat }) => tickFormat)?.tickFormat ?? defaultTickFormatter;
     const { xDomain, yDomain } = seriesDomainsAndData;
     return getAxisTicksPositions(
       chartDimensions,
@@ -79,6 +82,7 @@ export const computeAxisVisibleTicksSelector = createCachedSelector(
       yDomain,
       totalBarsInCluster,
       isHistogramMode,
+      fallBackTickFormatter,
       barsPadding,
     );
   },

src/chart_types/xy_chart/state/utils/utils.ts

@@ -20,7 +20,7 @@
 import { SeriesKey, SeriesIdentifier } from '../../../../commons/series_id';
 import { Scale } from '../../../../scales';
 import { ScaleType } from '../../../../scales/constants';
-import { identity, mergePartial, Rotation, Color, isUniqueArray } from '../../../../utils/commons';
+import { mergePartial, Rotation, Color, isUniqueArray } from '../../../../utils/commons';
 import { CurveType } from '../../../../utils/curves';
 import { Dimensions } from '../../../../utils/dimensions';
 import { Domain } from '../../../../utils/domain';
@@ -31,6 +31,7 @@ import { XDomain, YDomain } from '../../domains/types';
 import { mergeXDomain } from '../../domains/x_domain';
 import { mergeYDomain } from '../../domains/y_domain';
 import { renderArea, renderBars, renderLine, renderBubble, isDatumFilled } from '../../rendering/rendering';
+import { defaultTickFormatter } from '../../utils/axis_utils';
 import { fillSeries } from '../../utils/fill_series';
 import { IndexedGeometryMap } from '../../utils/indexed_geometry_map';
 import { computeXScale, computeYScales, countBarsInCluster } from '../../utils/scales';
@@ -483,6 +484,7 @@ function renderGeometries(
   const bubbles: BubbleGeometry[] = [];
   const indexedGeometryMap = new IndexedGeometryMap();
   const isMixedChart = isUniqueArray(seriesSpecs, ({ seriesType }) => seriesType) && seriesSpecs.length > 1;
+  const fallBackTickFormatter = seriesSpecs.find(({ tickFormat }) => tickFormat)?.tickFormat ?? defaultTickFormatter;
   const geometriesCounts: GeometriesCounts = {
     points: 0,
     bars: 0,
@@ -510,7 +512,7 @@ function renderGeometries(
       });
 
       const { yAxis } = getAxesSpecForSpecId(axesSpecs, spec.groupId);
-      const valueFormatter = yAxis && yAxis.tickFormat ? yAxis.tickFormat : identity;
+      const valueFormatter = yAxis?.tickFormat ?? fallBackTickFormatter;
 
       const displayValueSettings = spec.displayValueSettings
         ? { valueFormatter, ...spec.displayValueSettings }

src/chart_types/xy_chart/tooltip/tooltip.test.ts

@@ -23,7 +23,7 @@ import { SpecTypes } from '../../../specs/constants';
 import { Position, RecursivePartial } from '../../../utils/commons';
 import { BarGeometry } from '../../../utils/geometry';
 import { AxisStyle } from '../../../utils/themes/theme';
-import { AxisSpec, BarSeriesSpec, SeriesTypes } from '../utils/specs';
+import { AxisSpec, BarSeriesSpec, SeriesTypes, TickFormatter } from '../utils/specs';
 import { formatTooltip } from './tooltip';
 
 const style: RecursivePartial<AxisStyle> = {
@@ -274,4 +274,59 @@ describe('Tooltip formatting', () => {
     tooltipValue = formatTooltip(geometry, SPEC_1, true, true, false, YAXIS_SPEC);
     expect(tooltipValue.isHighlighted).toBe(false);
   });
+
+  it('should format ticks with custom formatter from spec', () => {
+    const axisTickFormatter: TickFormatter = (v) => `${v} axis`;
+    const tickFormatter: TickFormatter = (v) => `${v} spec`;
+    const axisSpec: AxisSpec = {
+      ...YAXIS_SPEC,
+      tickFormat: axisTickFormatter,
+    };
+    const spec: BarSeriesSpec = {
+      ...SPEC_1,
+      tickFormat: tickFormatter,
+    };
+    const tooltipValue = formatTooltip(indexedGeometry, spec, false, false, false, axisSpec);
+    expect(tooltipValue.value).toBe('10 spec');
+  });
+
+  it('should format ticks with custom formatter from axis', () => {
+    const axisTickFormatter: TickFormatter = (v) => `${v} axis`;
+    const axisSpec: AxisSpec = {
+      ...YAXIS_SPEC,
+      tickFormat: axisTickFormatter,
+    };
+    const tooltipValue = formatTooltip(indexedGeometry, SPEC_1, false, false, false, axisSpec);
+    expect(tooltipValue.value).toBe('10 axis');
+  });
+
+  it('should format ticks with default formatter', () => {
+    const tooltipValue = formatTooltip(indexedGeometry, SPEC_1, false, false, false, YAXIS_SPEC);
+    expect(tooltipValue.value).toBe('10');
+  });
+
+  it('should format header with custom formatter from axis', () => {
+    const axisTickFormatter: TickFormatter = (v) => `${v} axis`;
+    const tickFormatter: TickFormatter = (v) => `${v} spec`;
+    const axisSpec: AxisSpec = {
+      ...YAXIS_SPEC,
+      tickFormat: axisTickFormatter,
+    };
+    const spec: BarSeriesSpec = {
+      ...SPEC_1,
+      tickFormat: tickFormatter,
+    };
+    const tooltipValue = formatTooltip(indexedGeometry, spec, true, false, false, axisSpec);
+    expect(tooltipValue.value).toBe('1 axis');
+  });
+
+  it('should format header with default formatter from axis', () => {
+    const tickFormatter: TickFormatter = (v) => `${v} spec`;
+    const spec: BarSeriesSpec = {
+      ...SPEC_1,
+      tickFormat: tickFormatter,
+    };
+    const tooltipValue = formatTooltip(indexedGeometry, spec, true, false, false, YAXIS_SPEC);
+    expect(tooltipValue.value).toBe('1');
+  });
 });

src/chart_types/xy_chart/tooltip/tooltip.ts

@@ -21,8 +21,8 @@ import { LegendItemExtraValues } from '../../../commons/legend';
 import { SeriesKey } from '../../../commons/series_id';
 import { TooltipValue } from '../../../specs';
 import { getAccessorFormatLabel } from '../../../utils/accessor';
-import { identity } from '../../../utils/commons';
 import { IndexedGeometry, BandedAccessorType } from '../../../utils/geometry';
+import { defaultTickFormatter } from '../utils/axis_utils';
 import { getSeriesName } from '../utils/series';
 import {
   AxisSpec,
@@ -84,12 +84,14 @@ export function formatTooltip(
 
   const value = isHeader ? x : y;
   const tickFormatOptions: TickFormatterOptions | undefined = spec.timeZone ? { timeZone: spec.timeZone } : undefined;
+  const tickFormatter =
+    (isHeader ? axisSpec?.tickFormat : spec.tickFormat ?? axisSpec?.tickFormat) ?? defaultTickFormatter;
 
   return {
     seriesIdentifier,
     valueAccessor: accessor,
     label,
-    value: axisSpec ? axisSpec.tickFormat(value, tickFormatOptions) : identity(value),
+    value: tickFormatter(value, tickFormatOptions),
     markValue: isHeader || mark === null ? null : mark,
     color,
     isHighlighted: isHeader ? false : isHighlighted,