Angular Chart with Static X Axis

1import {
2    XyDataSeries,
3    NumericAxis,
4    FastLineRenderableSeries,
5    SciChartSurface,
6    EAutoRange,
7    HorizontalLineAnnotation,
8    NumberRange,
9    EAxisAlignment,
10} from "scichart";
11import { appTheme } from "../../../theme";
12
13export const drawExample = async (rootElement: string | HTMLDivElement) => {
14    const { sciChartSurface, wasmContext } = await SciChartSurface.create(rootElement, {
15        theme: {
16            ...appTheme.SciChartJsTheme,
17            majorGridLineBrush: "#FFFFFF22", // make gridlines more noticeable
18        },
19    });
20
21    // Create X Axis
22    const staticXAxis = new NumericAxis(wasmContext, {
23        labelPrecision: 0,
24        autoRange: EAutoRange.Always,
25        axisAlignment: EAxisAlignment.Top,
26        axisTitle: "Static Axis",
27        isStaticAxis: true, // when true, gridlines and axis labels keep their initial position on visible range change
28        // drawMajorBands: false, // avoids flickering - when values change fast and isStaticAxis is true
29    });
30
31    const xAxis = new NumericAxis(wasmContext, {
32        labelPrecision: 0,
33        autoRange: EAutoRange.Always,
34        axisAlignment: EAxisAlignment.Bottom,
35        axisTitle: "Normal Axis",
36        id: "Normal",
37        isStaticAxis: false, // when true, gridlines and axis labels keep their initial position on visible range change
38        // drawMajorBands: false, // avoids flickering - when values change fast and isStaticAxis is true
39    });
40    staticXAxis.visibleRangeChanged.subscribe((data) => (xAxis.visibleRange = data.visibleRange));
41
42    sciChartSurface.xAxes.add(staticXAxis, xAxis);
43
44    // Create Y Axis
45    const yAxis = new NumericAxis(wasmContext, {
46        visibleRange: new NumberRange(-2, 2),
47    });
48    sciChartSurface.yAxes.add(yAxis);
49
50    // build data series
51    const xValues = [];
52    const yValues = [];
53    const fifoCapacity = 1000;
54    let i = 0;
55    const makeY = (x: number) => Math.sin(x * 0.05) - 0.1 * Math.sin(x * 0.1) - Math.cos(x * 0.005);
56    for (; i < fifoCapacity; i++) {
57        xValues.push(i);
58        yValues.push(makeY(i));
59    }
60
61    // Add a line series with initial data
62    const dataSeries = new XyDataSeries(wasmContext, {
63        xValues,
64        yValues,
65        fifoCapacity,
66    });
67
68    sciChartSurface.renderableSeries.add(
69        new FastLineRenderableSeries(wasmContext, {
70            dataSeries,
71            stroke: appTheme.VividOrange,
72            strokeThickness: 4,
73        })
74    );
75
76    const updateCallback = () => {
77        const xUpdate = [];
78        const yUpdate = [];
79
80        for (let j = 0; j < 2; i++, j++) {
81            xUpdate.push(i);
82            yUpdate.push(makeY(i));
83        }
84        dataSeries.appendRange(xUpdate, yUpdate);
85    };
86
87    setInterval(updateCallback, 10);
88
89    // line annotation at x = 0
90    sciChartSurface.annotations.add(
91        new HorizontalLineAnnotation({
92            stroke: "#FFFFFF44",
93            strokeThickness: 1,
94            y1: 0,
95        })
96    );
97
98    function toggleStaticAxis() {
99        if (staticXAxis.isPrimaryAxis) {
100            xAxis.isPrimaryAxis = true;
101        } else {
102            staticXAxis.isPrimaryAxis = true;
103        }
104    }
105
106    return { sciChartSurface, wasmContext, controls: { toggleStaticAxis } };
107};
108