@amcharts/amcharts5/.internal/charts/stock/indicators/MACross.js

amCharts 5

import { Indicator } from "./Indicator";
import { LineSeries } from "../../xy/series/LineSeries";
/**
 * An implementation of a [[StockChart]] indicator.
 *
 * @see {@link https://www.amcharts.com/docs/v5/charts/stock/indicators/} for more info
 */
export class MACross extends Indicator {
    constructor() {
        super(...arguments);
        this._editableSettings = [{
                key: "period",
                name: this.root.language.translateAny("Slow period"),
                type: "number",
                minValue: 5,
                maxValue: 500,
                step: 1
            }, {
                key: "seriesColor",
                name: this.root.language.translateAny("Slow period"),
                type: "color"
            }, {
                key: "fastPeriod",
                name: this.root.language.translateAny("Fast period"),
                type: "number",
                minValue: 2,
                maxValue: 100,
                step: 1
            }, {
                key: "fastColor",
                name: this.root.language.translateAny("Fast period"),
                type: "color"
            }];
    }
    _prepareChildren() {
        if (this.isDirty("period") || this.isDirty("fastPeriod")) {
            this.markDataDirty();
        }
        if (this.isDirty("fastColor")) {
            this._updateSeriesColor(this.fastSeries, this.get("fastColor"), "fastColor");
        }
        this.setCustomData("fastPeriod", this.get("fastPeriod"));
        super._prepareChildren();
    }
    _dispose() {
        this.fastSeries.dispose();
        super._dispose();
    }
    _afterNew() {
        super._afterNew();
        const stockSeries = this.get("stockSeries");
        const chart = stockSeries.chart;
        if (chart) {
            const series = chart.series.push(LineSeries.new(this._root, {
                valueXField: "valueX",
                valueYField: "ma",
                groupDataDisabled: true,
                calculateAggregates: true,
                xAxis: stockSeries.get("xAxis"),
                yAxis: stockSeries.get("yAxis"),
                themeTags: ["indicator", "macross"],
                name: "MA"
            }));
            series.setPrivate("baseValueSeries", stockSeries);
            this.series = series;
            const fastSeries = chart.series.push(LineSeries.new(this._root, {
                valueXField: "valueX",
                valueYField: "maf",
                groupDataDisabled: true,
                calculateAggregates: true,
                xAxis: stockSeries.get("xAxis"),
                yAxis: stockSeries.get("yAxis"),
                stroke: this.get("fastColor"),
                themeTags: ["indicator", "macross", "fast"]
            }));
            fastSeries.setPrivate("baseValueSeries", stockSeries);
            this.fastSeries = fastSeries;
            this._handleLegend(series);
        }
    }
    /**
     * @ignore
     */
    prepareData() {
        if (this.series) {
            let period = this.get("period", 21);
            let fastPeriod = this.get("fastPeriod", 9);
            const stockSeries = this.get("stockSeries");
            const dataItems = stockSeries.dataItems;
            let data = this._getDataArray(dataItems);
            this._sma(data, period, "value_y", "ma");
            this._sma(data, fastPeriod, "value_y", "maf");
            this.series.updateData(data);
            this.fastSeries.updateData(data);
        }
    }
}
MACross.className = "MACross";
MACross.classNames = Indicator.classNames.concat([MACross.className]);
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