React Population Pyramid

1import {
2    EAxisAlignment,
3    MouseWheelZoomModifier,
4    NumberRange,
5    NumericAxis,
6    XyDataSeries,
7    ZoomExtentsModifier,
8    SciChartSurface,
9    ENumericFormat,
10    EColumnDataLabelPosition,
11    StackedColumnRenderableSeries,
12    Thickness,
13    LegendModifier,
14    StackedColumnCollection,
15    IDataLabelLayoutManager,
16    RenderPassInfo,
17    IRenderableSeries,
18    IStackedColumnSeriesDataLabelProviderOptions,
19    BottomAlignedOuterHorizontallyStackedAxisLayoutStrategy,
20    ELegendPlacement,
21    WaveAnimation,
22    SciChartDefaults,
23} from "scichart";
24import { appTheme } from "../../../theme";
25
26// custom label manager to avoid overlapping labels
27class CustomDataLabelManager implements IDataLabelLayoutManager {
28    performTextLayout(sciChartSurface: SciChartSurface, renderPassInfo: RenderPassInfo): void {
29        const renderableSeries = sciChartSurface.renderableSeries.asArray() as IRenderableSeries[];
30
31        for (let i = 0; i < renderableSeries.length; i++) {
32            // loop through all series (i.e. 2 stacked series - Male and Female)
33
34            const currentSeries = renderableSeries[i] as StackedColumnRenderableSeries;
35            if (currentSeries instanceof StackedColumnCollection) {
36                // @ts-ignore
37                const stackedSeries: StackedColumnRenderableSeries[] = currentSeries.asArray();
38
39                const outerSeries = stackedSeries[1]; // the outer Series (i.e. Africa),
40                const innerSeries = stackedSeries[0]; // the inner Series (i.e. Europe)
41
42                if (!innerSeries.isVisible) {
43                    continue; // to NOT use accumulated value to outer series if inner series is hidden
44                }
45
46                const outerLabels = outerSeries.dataLabelProvider?.dataLabels || [];
47                const innerLabels = innerSeries.dataLabelProvider?.dataLabels || [];
48
49                let outerIndex = 0; // used to sync the outer labels with the inner labels
50
51                for (let k = 0; k < innerLabels.length; k++) {
52                    const outerLabel = outerLabels[outerIndex];
53                    const innerLabel = innerLabels[k];
54
55                    if (outerLabel && innerLabel) {
56                        const outerLabelPosition = outerLabel.position;
57                        const innerLabelPosition = innerLabel.position;
58
59                        if (Math.abs(outerLabelPosition.y - innerLabelPosition.y) > outerLabel.rect.height / 2) {
60                            continue; // do not align labels if they are not on the same level
61                        }
62
63                        outerIndex++;
64
65                        // calculate threshold for overlapping
66                        const limitWidth = i == 0 ? outerLabel.rect.width : innerLabel.rect.width;
67
68                        // minimum margin between 2 labels, feel free to experiment with different values
69                        const marginBetweenLabels = 12;
70
71                        if (Math.abs(outerLabelPosition.x - innerLabelPosition.x) < limitWidth) {
72                            // console.log(`Aligning labels: ${outerLabel.text} with ${innerLabel.text}`);
73                            let newX;
74                            if (i == 0) {
75                                // if we are in Male (left) chart, draw left
76                                newX = innerLabel.position.x - outerLabel.rect.width - marginBetweenLabels;
77                            } else {
78                                // if we are in Female (right) chart, draw right
79                                newX = innerLabel.rect.right + marginBetweenLabels;
80                            }
81
82                            outerLabel.position = {
83                                x: newX,
84                                y: outerLabel.position.y,
85                            };
86                        }
87                    }
88                }
89            }
90        }
91    }
92}
93
94// Population Pyramid Data
95const PopulationData = {
96    xValues: [0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100],
97    yValues: {
98        Africa: {
99            male: [
100                35754890, 31813896, 28672207, 24967595, 20935790, 17178324, 14422055, 12271907, 10608417, 8608183,
101                6579937, 5035598, 3832420, 2738448, 1769284, 1013988, 470834, 144795, 26494, 2652, 140,
102            ],
103            female: [
104                34834623, 31000760, 27861135, 24206021, 20338468, 16815440, 14207659, 12167437, 10585531, 8658614,
105                6721555, 5291815, 4176910, 3076943, 2039952, 1199203, 591092, 203922, 45501, 5961, 425,
106            ],
107        },
108        Europe: {
109            male: [
110                4869936, 5186991, 5275063, 5286053, 5449038, 5752398, 6168124, 6375035, 6265554, 5900833, 6465830,
111                7108184, 6769524, 5676968, 4828153, 3734266, 2732054, 1633630, 587324, 128003, 12023,
112            ],
113            female: [
114                4641147, 4940521, 5010242, 5010526, 5160160, 5501673, 6022599, 6329356, 6299693, 5930345, 6509757,
115                7178487, 7011569, 6157651, 5547296, 4519433, 3704145, 2671974, 1276597, 399148, 60035,
116            ],
117        },
118    },
119};
120
121export const drawExample = async (rootElement: string | HTMLDivElement) => {
122    const { sciChartSurface, wasmContext } = await SciChartSurface.create(rootElement, {
123        theme: appTheme.SciChartJsTheme,
124    });
125
126    // Create XAxis, and the 2 YAxes
127    const xAxis = new NumericAxis(wasmContext, {
128        labelPrecision: 0,
129        autoTicks: false,
130        majorDelta: 5,
131        flippedCoordinates: true,
132        axisAlignment: EAxisAlignment.Left,
133        axisTitle: "Age",
134    });
135
136    // Force the visible range to always be a fixed value, overriding any zoom behaviour
137    xAxis.visibleRangeChanged.subscribe(() => {
138        xAxis.visibleRange = new NumberRange(-3, 103); // +-3 for extra padding
139    });
140
141    // 2 Y Axes (left and right)
142    const yAxisRight = new NumericAxis(wasmContext, {
143        axisAlignment: EAxisAlignment.Bottom,
144        flippedCoordinates: true,
145        axisTitle: "Female",
146        labelStyle: {
147            fontSize: 12,
148        },
149        growBy: new NumberRange(0, 0.15), // to have the furthest right labels visible
150        labelFormat: ENumericFormat.Engineering,
151        id: "femaleAxis",
152    });
153
154    // Sync the visible range of the 2 Y axes
155    yAxisRight.visibleRangeChanged.subscribe((args: any) => {
156        if (args.visibleRange.min > 0) {
157            yAxisRight.visibleRange = new NumberRange(0, args.visibleRange.max);
158        }
159        yAxisLeft.visibleRange = new NumberRange(0, args.visibleRange.max);
160    });
161
162    const yAxisLeft = new NumericAxis(wasmContext, {
163        axisAlignment: EAxisAlignment.Bottom,
164        axisTitle: "Male",
165        labelStyle: {
166            fontSize: 12,
167        },
168        growBy: new NumberRange(0, 0.15), // to have the furthest left labels visible
169        labelFormat: ENumericFormat.Engineering,
170        id: "maleAxis",
171    });
172
173    // Sync the visible range of the 2 Y axes
174    yAxisLeft.visibleRangeChanged.subscribe((args: any) => {
175        if (args.visibleRange.min > 0) {
176            yAxisLeft.visibleRange = new NumberRange(0, args.visibleRange.max);
177        }
178        yAxisRight.visibleRange = new NumberRange(0, args.visibleRange.max);
179    });
180
181    sciChartSurface.xAxes.add(xAxis);
182    sciChartSurface.yAxes.add(yAxisLeft, yAxisRight);
183
184    const dataLabels: IStackedColumnSeriesDataLabelProviderOptions = {
185        positionMode: EColumnDataLabelPosition.Outside,
186        style: {
187            fontFamily: "Arial",
188            fontSize: 12,
189            padding: new Thickness(0, 3, 0, 3),
190        },
191        color: "#EEEEEE",
192        numericFormat: ENumericFormat.Engineering,
193    };
194
195    // Create some RenderableSeries or each part of the stacked column
196    const maleChartEurope = new StackedColumnRenderableSeries(wasmContext, {
197        dataSeries: new XyDataSeries(wasmContext, {
198            xValues: PopulationData.xValues,
199            yValues: PopulationData.yValues.Europe.male,
200            dataSeriesName: "Male Europe",
201        }),
202        fill: appTheme.VividBlue + "99",
203        stackedGroupId: "MaleSeries",
204        dataLabels,
205    });
206
207    const maleChartAfrica = new StackedColumnRenderableSeries(wasmContext, {
208        dataSeries: new XyDataSeries(wasmContext, {
209            xValues: PopulationData.xValues,
210            yValues: PopulationData.yValues.Africa.male,
211            dataSeriesName: "Male Africa",
212        }),
213        fill: appTheme.VividBlue,
214        stackedGroupId: "MaleSeries",
215        dataLabels,
216    });
217
218    // female charts
219    const femaleChartEurope = new StackedColumnRenderableSeries(wasmContext, {
220        dataSeries: new XyDataSeries(wasmContext, {
221            xValues: PopulationData.xValues,
222            yValues: PopulationData.yValues.Europe.female,
223            dataSeriesName: "Female Europe",
224        }),
225        fill: appTheme.VividRed + "99",
226        stackedGroupId: "FemaleSeries",
227        dataLabels,
228    });
229
230    const femaleChartAfrica = new StackedColumnRenderableSeries(wasmContext, {
231        dataSeries: new XyDataSeries(wasmContext, {
232            xValues: PopulationData.xValues,
233            yValues: PopulationData.yValues.Africa.female,
234            dataSeriesName: "Female Africa",
235        }),
236        fill: appTheme.VividRed,
237        stackedGroupId: "FemaleSeries",
238        dataLabels,
239    });
240
241    const stackedColumnCollectionMale = new StackedColumnCollection(wasmContext, {
242        dataPointWidth: 0.9,
243        yAxisId: "maleAxis",
244    });
245    const stackedColumnCollectionFemale = new StackedColumnCollection(wasmContext, {
246        dataPointWidth: 0.9,
247        yAxisId: "femaleAxis",
248    });
249
250    stackedColumnCollectionMale.add(maleChartEurope, maleChartAfrica);
251    stackedColumnCollectionFemale.add(femaleChartEurope, femaleChartAfrica);
252
253    // add wave animation to the series
254    stackedColumnCollectionMale.animation = new WaveAnimation({ duration: 1000 });
255    stackedColumnCollectionFemale.animation = new WaveAnimation({ duration: 1000 });
256
257    // manage data labels overlapping with custom layout manager
258    sciChartSurface.dataLabelLayoutManager = new CustomDataLabelManager();
259
260    // Add the Stacked Column collection to the chart
261    sciChartSurface.renderableSeries.add(stackedColumnCollectionMale, stackedColumnCollectionFemale);
262
263    sciChartSurface.layoutManager.bottomOuterAxesLayoutStrategy =
264        new BottomAlignedOuterHorizontallyStackedAxisLayoutStrategy(); // stack and sync the 2 Y axes
265
266    const maleLegend = new LegendModifier({
267        showCheckboxes: true,
268        showSeriesMarkers: true,
269        showLegend: true,
270        backgroundColor: "#222",
271        placement: ELegendPlacement.TopLeft,
272    });
273
274    const femaleLegend = new LegendModifier({
275        showCheckboxes: true,
276        showSeriesMarkers: true,
277        showLegend: true,
278        backgroundColor: "#222",
279        placement: ELegendPlacement.TopRight,
280    });
281
282    // Add zooming and panning behaviour
283    sciChartSurface.chartModifiers.add(
284        new ZoomExtentsModifier(),
285        new MouseWheelZoomModifier(),
286        maleLegend,
287        femaleLegend
288    );
289
290    // exclude Male series for the Female legend
291    femaleLegend.includeSeries(maleChartEurope, false);
292    femaleLegend.includeSeries(maleChartAfrica, false);
293
294    // exclude Female series for the Male legend
295    maleLegend.includeSeries(femaleChartEurope, false);
296    maleLegend.includeSeries(femaleChartAfrica, false);
297
298    sciChartSurface.zoomExtents();
299
300    return { sciChartSurface, wasmContext };
301};
302