feat(partition): add tooltip (#544)

This commit moves the `Datum`, `Rotation`, `Position` and `Color` into `utils/commons`. It decouples the legend from axis position and moves the `scales` to `utils/scales`.
It decouples the tooltip component from the XY chart to allow Partition charts and other chart to use it.

close #246

Co-authored-by: Marco Vettorello <vettorello.marco@gmail.com>

Author: monfera

integration/tests/__image_snapshots__/all-test-ts-baseline-visual-tests-for-all-stories-sunburst-multiple-datums-for-tooltip-visually-looks-correct-1-snap.png

@@ -1,5 +1,5 @@
 import { Config } from './config_types';
-import { Coordinate, Distance, PointObject, PointTuple, Radian } from './geometry_types';
+import { Coordinate, Distance, Pixels, PointObject, PointTuple, Radian } from './geometry_types';
 import { Font } from './types';
 import { config } from '../config/config';
 import { ArrayNode, HierarchyOfArrays } from '../utils/group_by_rollup';
@@ -54,23 +54,28 @@ export interface OutsideLinksViewModel {
   points: Array<PointTuple>;
 }
 
+export type PickFunction = (x: Pixels, y: Pixels) => Array<QuadViewModel>;
+
 export type ShapeViewModel = {
   config: Config;
   quadViewModel: QuadViewModel[];
   rowSets: RowSet[];
   linkLabelViewModels: LinkLabelVM[];
   outsideLinksViewModel: OutsideLinksViewModel[];
   diskCenter: PointObject;
+  pickQuads: PickFunction;
 };
 
-export const nullSectorViewModel = (): ShapeViewModel => ({
-  config,
+export const nullShapeViewModel = (specifiedConfig?: Config, diskCenter?: PointObject): ShapeViewModel => ({
+  config: specifiedConfig || config,
   quadViewModel: [],
   rowSets: [],
   linkLabelViewModels: [],
   outsideLinksViewModel: [],
-  diskCenter: { x: 0, y: 0 },
+  diskCenter: diskCenter || { x: 0, y: 0 },
+  pickQuads: () => [],
 });
+
 type TreeLevel = number;
 
 interface AngleFromTo {

src/chart_types/partition_chart/layout/types/viewmodel_types.ts

@@ -4,12 +4,14 @@ import { Datum } from '../../../../utils/commons';
 export const AGGREGATE_KEY = 'value'; // todo later switch back to 'aggregate'
 export const DEPTH_KEY = 'depth';
 export const CHILDREN_KEY = 'children';
+export const INPUT_KEY = 'inputIndex';
 export const PARENT_KEY = 'parent';
 export const SORT_INDEX_KEY = 'sortIndex';
 
 interface NodeDescriptor {
   [AGGREGATE_KEY]: number;
   [DEPTH_KEY]: number;
+  [INPUT_KEY]?: Array<number>;
 }
 
 export type ArrayEntry = [Key, ArrayNode];
@@ -71,11 +73,13 @@ export function groupByRollup(
       const keyExists = pointer.has(key);
       const last = i === keyCount - 1;
       const node = keyExists && pointer.get(key);
+      const inputIndices = node ? node[INPUT_KEY] : [];
       const childrenMap = node ? node[CHILDREN_KEY] : new Map();
       const aggregate = node ? node[AGGREGATE_KEY] : identity();
       const reductionValue = reducer(aggregate, valueAccessor(n));
       pointer.set(key, {
         [AGGREGATE_KEY]: reductionValue,
+        [INPUT_KEY]: [...inputIndices, index],
         [DEPTH_KEY]: i,
         ...(!last && { [CHILDREN_KEY]: childrenMap }),
       });
@@ -91,7 +95,7 @@ export function groupByRollup(
 
 function getRootArrayNode(): ArrayNode {
   const children: HierarchyOfArrays = [];
-  const bootstrap = { [AGGREGATE_KEY]: NaN, [DEPTH_KEY]: NaN, [CHILDREN_KEY]: children };
+  const bootstrap = { [AGGREGATE_KEY]: NaN, [DEPTH_KEY]: NaN, [CHILDREN_KEY]: children, [INPUT_KEY]: [] as number[] };
   Object.assign(bootstrap, { [PARENT_KEY]: bootstrap });
   const result: ArrayNode = bootstrap as ArrayNode;
   return result;
@@ -109,6 +113,7 @@ export function mapsToArrays(root: HierarchyOfMaps, sorter: NodeSorter): Hierarc
           [DEPTH_KEY]: NaN,
           [SORT_INDEX_KEY]: NaN,
           [PARENT_KEY]: parent,
+          [INPUT_KEY]: [],
         };
         const newValue: ArrayNode = Object.assign(
           resultNode,

src/chart_types/partition_chart/layout/utils/group_by_rollup.ts

@@ -9,7 +9,9 @@ import { sunburst } from '../utils/sunburst';
 import { IndexedAccessorFn } from '../../../../utils/accessor';
 import { argsToRGBString, stringToRGB } from '../utils/d3_utils';
 import {
+  nullShapeViewModel,
   OutsideLinksViewModel,
+  PickFunction,
   QuadViewModel,
   RawTextGetter,
   RowSet,
@@ -117,7 +119,7 @@ export function makeOutsideLinksViewModel(
     })
     .filter(({ points }: OutsideLinksViewModel) => points.length > 1);
 }
-// todo break up this long function
+
 export function shapeViewModel(
   textMeasure: TextMeasure,
   config: Config,
@@ -158,14 +160,7 @@ export function shapeViewModel(
     facts.some((n) => valueAccessor(n) < 0) ||
     facts.reduce((p: number, n) => aggregator.reducer(p, valueAccessor(n)), aggregator.identity()) <= 0
   ) {
-    return {
-      config,
-      diskCenter,
-      quadViewModel: [],
-      rowSets: [],
-      linkLabelViewModels: [],
-      outsideLinksViewModel: [],
-    };
+    return nullShapeViewModel(config, diskCenter);
   }
 
   // We can precompute things invariant of how the rectangle is divvied up.
@@ -273,6 +268,18 @@ export function shapeViewModel(
     valueFormatter,
   );
 
+  const pickQuads: PickFunction = (x, y) => {
+    return quadViewModel.filter(
+      treemapLayout
+        ? ({ x0, y0, x1, y1 }) => x0 <= x && x <= x1 && y0 <= y && y <= y1
+        : ({ x0, y0px, x1, y1px }) => {
+            const angleX = (Math.atan2(y, x) + TAU / 4 + TAU) % TAU;
+            const yPx = Math.sqrt(x * x + y * y);
+            return x0 <= angleX && angleX <= x1 && y0px <= yPx && yPx <= y1px;
+          },
+    );
+  };
+
   // combined viewModel
   return {
     config,
@@ -281,5 +288,6 @@ export function shapeViewModel(
     rowSets,
     linkLabelViewModels,
     outsideLinksViewModel,
+    pickQuads,
   };
 }

src/chart_types/partition_chart/layout/viewmodel/viewmodel.ts

@@ -1,13 +1,14 @@
-import React from 'react';
+import React, { MouseEvent } from 'react';
 import { bindActionCreators, Dispatch } from 'redux';
 import { connect } from 'react-redux';
 import { onChartRendered } from '../../../../state/actions/chart';
 import { isInitialized } from '../../../../state/selectors/is_initialized';
 import { GlobalChartState } from '../../../../state/chart_state';
 import { Dimensions } from '../../../../utils/dimensions';
 import { partitionGeometries } from '../../state/selectors/geometries';
-import { nullSectorViewModel, ShapeViewModel } from '../../layout/types/viewmodel_types';
+import { nullShapeViewModel, QuadViewModel, ShapeViewModel } from '../../layout/types/viewmodel_types';
 import { renderPartitionCanvas2d } from './canvas_renderers';
+import { INPUT_KEY } from '../../layout/utils/group_by_rollup';
 
 interface ReactiveChartStateProps {
   initialized: boolean;
@@ -69,6 +70,38 @@ class PartitionComponent extends React.Component<PartitionProps> {
     }
   }
 
+  handleMouseMove(e: MouseEvent<HTMLCanvasElement>) {
+    const {
+      initialized,
+      chartContainerDimensions: { width, height },
+    } = this.props;
+    if (!this.canvasRef.current || !this.ctx || !initialized || width === 0 || height === 0) {
+      return;
+    }
+    const picker = this.props.geometries.pickQuads;
+    const box = this.canvasRef.current.getBoundingClientRect();
+    const diskCenter = this.props.geometries.diskCenter;
+    const x = e.clientX - box.left - diskCenter.x;
+    const y = e.clientY - box.top - diskCenter.y;
+    const pickedShapes: Array<QuadViewModel> = picker(x, y);
+    const datumIndices = new Set();
+    pickedShapes.forEach((shape) => {
+      const node = shape.parent;
+      const shapeNode = node.children.find(([key]) => key === shape.dataName);
+      if (shapeNode) {
+        const indices = shapeNode[1][INPUT_KEY] || [];
+        indices.forEach((i) => datumIndices.add(i));
+      }
+    });
+    /*
+    console.log(
+      pickedShapes.map((s) => s.value),
+      [...datumIndices.values()],
+    );
+    */
+    return pickedShapes; // placeholder
+  }
+
   render() {
     const {
       initialized,
@@ -84,6 +117,7 @@ class PartitionComponent extends React.Component<PartitionProps> {
         className="echCanvasRenderer"
         width={width * this.devicePixelRatio}
         height={height * this.devicePixelRatio}
+        onMouseMove={this.handleMouseMove.bind(this)}
         style={{
           width,
           height,
@@ -103,7 +137,7 @@ const mapDispatchToProps = (dispatch: Dispatch): ReactiveChartDispatchProps =>
 
 const DEFAULT_PROPS: ReactiveChartStateProps = {
   initialized: false,
-  geometries: nullSectorViewModel(),
+  geometries: nullShapeViewModel(),
   chartContainerDimensions: {
     width: 0,
     height: 0,

src/chart_types/partition_chart/renderer/canvas/partition.tsx

@@ -1,7 +1,10 @@
 import React from 'react';
-import { InternalChartState } from '../../../state/chart_state';
+import { InternalChartState, GlobalChartState, BackwardRef } from '../../../state/chart_state';
 import { ChartTypes } from '../..';
 import { Partition } from '../renderer/canvas/partition';
+import { isTooltipVisibleSelector } from '../state/selectors/is_tooltip_visible';
+import { getTooltipInfoSelector } from '../state/selectors/tooltip';
+import { Tooltip } from '../../../components/tooltip';
 
 const EMPTY_MAP = new Map();
 export class PartitionState implements InternalChartState {
@@ -21,19 +24,29 @@ export class PartitionState implements InternalChartState {
   getLegendItemsValues() {
     return EMPTY_MAP;
   }
-  chartRenderer() {
-    return <Partition />;
+  chartRenderer(containerRef: BackwardRef) {
+    return (
+      <>
+        <Tooltip getChartContainerRef={containerRef} />
+        <Partition />
+      </>
+    );
   }
   getPointerCursor() {
     return 'default';
   }
-  isTooltipVisible() {
-    return false;
+  isTooltipVisible(globalState: GlobalChartState) {
+    return isTooltipVisibleSelector(globalState);
   }
-  getTooltipInfo() {
-    return undefined;
+  getTooltipInfo(globalState: GlobalChartState) {
+    return getTooltipInfoSelector(globalState);
   }
-  getTooltipAnchor() {
-    return null;
+  getTooltipAnchor(state: GlobalChartState) {
+    const position = state.interactions.pointer.current.position;
+    return {
+      isRotated: false,
+      x1: position.x,
+      y1: position.y,
+    };
   }
 }

src/chart_types/partition_chart/state/chart_state.tsx

@@ -3,7 +3,7 @@ import { GlobalChartState } from '../../../../state/chart_state';
 import { getSpecsFromStore } from '../../../../state/utils';
 import { ChartTypes } from '../../..';
 import { render } from './scenegraph';
-import { nullSectorViewModel, ShapeViewModel } from '../../layout/types/viewmodel_types';
+import { nullShapeViewModel, ShapeViewModel } from '../../layout/types/viewmodel_types';
 import { PartitionSpec } from '../../specs/index';
 import { SpecTypes } from '../../../../specs/settings';
 
@@ -15,6 +15,6 @@ export const partitionGeometries = createCachedSelector(
   [getSpecs, getParentDimensions],
   (specs, parentDimensions): ShapeViewModel => {
     const pieSpecs = getSpecsFromStore<PartitionSpec>(specs, ChartTypes.Partition, SpecTypes.Series);
-    return pieSpecs.length === 1 ? render(pieSpecs[0], parentDimensions) : nullSectorViewModel();
+    return pieSpecs.length === 1 ? render(pieSpecs[0], parentDimensions) : nullShapeViewModel();
   },
 )((state) => state.chartId);

src/chart_types/partition_chart/state/selectors/geometries.ts

@@ -0,0 +1,20 @@
+import createCachedSelector from 're-reselect';
+import { getSettingsSpecSelector } from '../../../../state/selectors/get_settings_specs';
+
+import { getChartIdSelector } from '../../../../state/selectors/get_chart_id';
+import { TooltipType, getTooltipType } from '../../../../specs';
+import { getTooltipInfoSelector } from './tooltip';
+
+/**
+ * The brush is available only for Ordinal xScales charts and
+ * if we have configured an onBrushEnd listener
+ */
+export const isTooltipVisibleSelector = createCachedSelector(
+  [getSettingsSpecSelector, getTooltipInfoSelector],
+  (settingsSpec, tooltipInfo): boolean => {
+    if (getTooltipType(settingsSpec) === TooltipType.None) {
+      return false;
+    }
+    return tooltipInfo.values.length > 0;
+  },
+)(getChartIdSelector);

src/chart_types/partition_chart/state/selectors/is_tooltip_visible.ts

@@ -1,7 +1,7 @@
 import { Dimensions } from '../../../../utils/dimensions';
 import { shapeViewModel } from '../../layout/viewmodel/viewmodel';
 import { measureText } from '../../layout/utils/measure';
-import { ShapeTreeNode, ShapeViewModel, RawTextGetter } from '../../layout/types/viewmodel_types';
+import { ShapeTreeNode, ShapeViewModel, RawTextGetter, nullShapeViewModel } from '../../layout/types/viewmodel_types';
 import { DEPTH_KEY } from '../../layout/utils/group_by_rollup';
 import { PartitionSpec, Layer } from '../../specs/index';
 import { identity, mergePartial, RecursivePartial } from '../../../../utils/commons';
@@ -23,14 +23,7 @@ export function render(partitionSpec: PartitionSpec, parentDimensions: Dimension
   const partialConfig: RecursivePartial<Config> = { ...specConfig, width, height };
   const config: Config = mergePartial(defaultConfig, partialConfig);
   if (!textMeasurerCtx) {
-    return {
-      config,
-      quadViewModel: [],
-      rowSets: [],
-      linkLabelViewModels: [],
-      outsideLinksViewModel: [],
-      diskCenter: { x: width / 2, y: height / 2 },
-    };
+    return nullShapeViewModel(config, { x: width / 2, y: height / 2 });
   }
   return shapeViewModel(
     measureText(textMeasurerCtx),