Angular Polar Sunburst Chart

1import {
2    PolarColumnRenderableSeries,
3    PolarNumericAxis,
4    SciChartPolarSurface,
5    EPolarAxisMode,
6    NumberRange,
7    EAxisAlignment,
8    EPolarLabelMode,
9    PolarCursorModifier,
10    TCursorTooltipDataTemplate,
11    SeriesInfo,
12    PolarDataPointSelectionModifier,
13    TSciChart,
14    EColumnMode,
15    XyxDataSeries,
16    EMultiLineAlignment,
17    EColumnDataLabelPosition,
18    EDataPointWidthMode,
19    GenericAnimation,
20    easing,
21    DoubleAnimator,
22} from "scichart";
23import { appTheme } from "../../../theme";
24import { SunburstMetadata } from "./SunburstMetadata";
25import { SunburstPaletteProvider } from "./SunburstPaletteProvider";
26import { getDataById, getElementById, TLevelDataForChart } from "./sunburstData";
27
28const drawSeriesFn = (
29    wasmContext: TSciChart,
30    xAxis: PolarNumericAxis,
31    yAxis: PolarNumericAxis,
32    sciChartSurface: SciChartPolarSurface,
33    polarLabelMode: EPolarLabelMode,
34    dataPointSelectionModifier: PolarDataPointSelectionModifier,
35    nodeId: number[],
36    selectedElStartX: number,
37    prevNodeId: number[]
38) => {
39    const startAngleDefault = -Math.PI / 2;
40
41    const clearSeriesFn = () => {
42        dataPointSelectionModifier.selectionChanged.unsubscribeAll();
43        sciChartSurface.renderableSeries.asArray().forEach((rs) => rs.delete());
44        sciChartSurface.renderableSeries.clear();
45    };
46
47    const level = nodeId.length - 1;
48    const prevLevel = prevNodeId.length - 1;
49    const prevXVisRangeDiff = xAxis.visibleRange.diff;
50
51    const polarColumnMode = EColumnMode.StartEnd;
52    const dataPointWidth = 0.5;
53    const paletteProvider = new SunburstPaletteProvider();
54
55    const createDataFn = (input$: TLevelDataForChart) => {
56        const [xValues$, yValues$, x1Values$] = input$.data;
57        return new XyxDataSeries(wasmContext, {
58            xValues: xValues$,
59            yValues: yValues$,
60            x1Values: x1Values$,
61            metadata: input$.metadata,
62        });
63    };
64
65    const levelData = getDataById(nodeId);
66    const rootNode = getElementById(nodeId);
67
68    const redrawSeriesFn = () => {
69        clearSeriesFn();
70        for (let i = 0; i < levelData.length; i++) {
71            const rs$ = new PolarColumnRenderableSeries(wasmContext, {
72                stroke: "black",
73                columnXMode: polarColumnMode,
74                dataLabels: {
75                    style: {
76                        fontSize: 16,
77                        multiLineAlignment: EMultiLineAlignment.Center,
78                        lineSpacing: 8,
79                    },
80                    color: "black",
81                    precision: 2,
82                    pointGapThreshold: 0,
83                    skipNumber: 0,
84                    polarLabelMode,
85                    labelYPositionMode: EColumnDataLabelPosition.Position,
86                    labelYPositionMultiplier: 0.5,
87                    metaDataSelector: (metadata) => {
88                        const md = metadata as SunburstMetadata;
89                        return `${md.title} \n ${md.value}`;
90                    },
91                },
92                dataSeries: createDataFn(levelData[i]),
93                strokeThickness: 2,
94                dataPointWidth,
95                dataPointWidthMode: EDataPointWidthMode.Range,
96                defaultY1: i,
97                paletteProvider: paletteProvider,
98            });
99            dataPointSelectionModifier.includeSeries(rs$, true);
100            sciChartSurface.renderableSeries.add(rs$);
101        }
102    };
103
104    const drillDownAnimationFn = (isReverse$: boolean, onCompleteFn$: () => void = () => undefined) => {
105        const xMin$ = 0; // always zero
106        const xMax0$ = prevXVisRangeDiff;
107        const xMax1$ = rootNode.value;
108
109        const startAngle0$ = isReverse$
110            ? startAngleDefault
111            : startAngleDefault + (2 * Math.PI * selectedElStartX) / xAxis.visibleRange.diff;
112        let startAngle1$: number;
113        if (isReverse$) {
114            const levelDiff$ = prevLevel - level;
115            const element$ = levelData[levelDiff$].metadata.find((a) => a.id.toString() === prevNodeId.toString());
116            startAngle1$ = startAngleDefault + (2 * Math.PI * element$.start) / rootNode.value;
117        } else {
118            startAngle1$ = startAngleDefault;
119        }
120
121        const yMin0$ = isReverse$ ? 0 : prevLevel - level;
122        const yMin1$ = isReverse$ ? level - prevLevel : 0;
123
124        const from$ = { x1: xMax0$, x2: startAngle0$, y1: yMin0$, y2: 0 };
125        const to$ = { x1: xMax1$, x2: startAngle1$, y1: yMin1$, y2: 0 };
126
127        const sweepAnimation = new GenericAnimation({
128            from: from$,
129            to: to$,
130            duration: 1000,
131            ease: easing.inOutSine,
132            onAnimate: (from, to, progress) => {
133                const xMaxCur = DoubleAnimator.interpolate(from.x1, to.x1, progress);
134                const startAngleCur = DoubleAnimator.interpolate(from.x2, to.x2, progress);
135                const yMinCur = DoubleAnimator.interpolate(from.y1, to.y1, progress);
136                const yMaxCur = yMinCur + 4;
137                xAxis.visibleRange = new NumberRange(xMin$, xMaxCur);
138                xAxis.startAngle = startAngleCur;
139                yAxis.visibleRange = new NumberRange(yMinCur, yMaxCur);
140            },
141            onCompleted: () => {
142                onCompleteFn$();
143            },
144        });
145        sciChartSurface.addAnimation(sweepAnimation);
146    };
147
148    const subscribeFn = () => {
149        dataPointSelectionModifier.selectionChanged.subscribe((args) => {
150            const selectedDataPoint = args.selectedDataPoints[0];
151            if (selectedDataPoint) {
152                const { yValue } = selectedDataPoint;
153                const md = selectedDataPoint?.metadata as SunburstMetadata;
154                const { id } = md;
155                const newId = [...id];
156                if (yValue === 1 && id.length > 1) {
157                    newId.pop();
158                }
159                drawSeriesFn(
160                    wasmContext,
161                    xAxis,
162                    yAxis,
163                    sciChartSurface,
164                    polarLabelMode,
165                    dataPointSelectionModifier,
166                    newId,
167                    md.start,
168                    nodeId
169                );
170            }
171        });
172    };
173
174    if (level < prevLevel) {
175        drillDownAnimationFn(true, () => {
176            redrawSeriesFn();
177            xAxis.startAngle = startAngleDefault;
178            yAxis.visibleRange = new NumberRange(0, 4);
179            subscribeFn();
180        });
181    } else if (level > prevLevel) {
182        redrawSeriesFn();
183        drillDownAnimationFn(false);
184        subscribeFn();
185    } else {
186        xAxis.startAngle = startAngleDefault;
187        xAxis.visibleRange = new NumberRange(0, rootNode.value);
188        yAxis.visibleRange = new NumberRange(0, 4);
189        redrawSeriesFn();
190        subscribeFn();
191    }
192};
193
194export const drawExample = async (rootElement: string | HTMLDivElement) => {
195    const { sciChartSurface, wasmContext } = await SciChartPolarSurface.create(rootElement, {
196        theme: appTheme.SciChartJsTheme,
197    });
198
199    const startAngle = -Math.PI / 2;
200    const totalAngle = 2 * Math.PI;
201
202    const xAxis = new PolarNumericAxis(wasmContext, {
203        isVisible: false,
204        polarAxisMode: EPolarAxisMode.Angular,
205        axisAlignment: EAxisAlignment.Top,
206        visibleRange: new NumberRange(0, 65),
207        startAngle,
208        totalAngle,
209    });
210    xAxis.polarLabelMode = EPolarLabelMode.Parallel;
211    sciChartSurface.xAxes.add(xAxis);
212
213    const yAxis = new PolarNumericAxis(wasmContext, {
214        isVisible: false,
215        polarAxisMode: EPolarAxisMode.Radial,
216        axisAlignment: EAxisAlignment.Right,
217        visibleRange: new NumberRange(0, 6),
218        flippedCoordinates: false,
219        startAngle,
220        totalAngle,
221    });
222    sciChartSurface.yAxes.add(yAxis);
223
224    const dataPointSelectionModifier = new PolarDataPointSelectionModifier({
225        allowClickSelect: true,
226        allowDragSelect: false,
227        selectionStroke: "red",
228        selectionFill: "#ff879f33",
229    });
230
231    drawSeriesFn(
232        wasmContext,
233        xAxis,
234        yAxis,
235        sciChartSurface,
236        EPolarLabelMode.Parallel,
237        dataPointSelectionModifier,
238        [0],
239        0,
240        [0]
241    );
242
243    const tooltipDataTemplate: TCursorTooltipDataTemplate = (seriesInfos: SeriesInfo[], tooltipTitle: string) => {
244        const res: string[] = [];
245        seriesInfos.forEach((si) => {
246            if (si.isHit) {
247                const md = si.pointMetadata as SunburstMetadata;
248                res.push(`Name: ${md.title}`);
249                res.push(`Value: ${md.value}`);
250            }
251        });
252        return res;
253    };
254
255    sciChartSurface.chartModifiers.add(
256        dataPointSelectionModifier,
257        new PolarCursorModifier({
258            showTooltip: true,
259            showCircularLine: false,
260            showRadialLine: false,
261            tooltipDataTemplate,
262        })
263    );
264
265    return { sciChartSurface, wasmContext };
266};
267