@nativescript-community/ui-chart/data/CandleDataSet.js

A powerful chart / graph plugin, supporting line, bar, pie, radar, bubble, and candlestick charts as well as scaling, panning and animations.

import { LineScatterCandleRadarDataSet } from './LineScatterCandleRadarDataSet';
import { Style } from '@nativescript-community/ui-canvas';
import { ColorTemplate } from '../utils/ColorTemplate';
export class CandleDataSet extends LineScatterCandleRadarDataSet {
    constructor(yVals, label, xProperty, yProperty, highProperty, lowProperty, openProperty, closeProperty) {
        super(yVals, label, xProperty, yProperty);
        /**
         * property to access the "high" value of an entry for this set
         *
         */
        this.highProperty = 'high';
        /**
         * property to access the "low" value of an entry for this set
         *
         */
        this.lowProperty = 'low';
        /**
         * property to access the "close" value of an entry for this set
         *
         */
        this.closeProperty = 'close';
        /**
         * property to access the "open" value of an entry for this set
         *
         */
        this.openProperty = 'open';
        /**
         * the width of the shadow of the candle
         */
        this.shadowWidth = 3;
        /**
         * should the candle bars show?
         * when false, only "ticks" will show
         * <p/>
         * - default: true
         */
        this.showCandleBar = true;
        /**
         * the space between the candle entries, default 0.1 (10%)
         */
        this.barSpace = 0.1;
        /**
         * use candle color for the shadow
         */
        this.shadowColorSameAsCandle = false;
        /**
         * palet style when open < close
         * increasing candlesticks are traditionally hollow
         */
        this.increasingPaintStyle = Style.STROKE;
        /**
         * palet style when open > close
         * descreasing candlesticks are traditionally filled
         */
        this.decreasingPaintStyle = Style.FILL;
        /**
         * color for open === close
         */
        this.neutralColor = ColorTemplate.COLOR_SKIP;
        /**
         * color for open < close
         */
        this.increasingColor = ColorTemplate.COLOR_SKIP;
        /**
         * color for open > close
         */
        this.decreasingColor = ColorTemplate.COLOR_SKIP;
        /**
         * shadow line color, set -1 for backward compatibility and uses default
         * color
         */
        this.shadowColor = ColorTemplate.COLOR_SKIP;
        if (highProperty) {
            this.highProperty = highProperty;
        }
        if (lowProperty) {
            this.lowProperty = lowProperty;
        }
        if (openProperty) {
            this.openProperty = openProperty;
        }
        if (closeProperty) {
            this.closeProperty = closeProperty;
        }
        this.init();
    }
    getEntryYValue(e) {
        const lowValue = e[this.lowProperty] || 0;
        const highValue = e[this.highProperty] || 0;
        return (lowValue + highValue) / 2;
    }
    calcMinMaxForEntry(e, index) {
        if (!e)
            return;
        const high = e[this.highProperty];
        const low = e[this.lowProperty];
        if (low < this.mYMin)
            this.mYMin = low;
        if (high > this.mYMax)
            this.mYMax = high;
        this.calcMinMaxX(e, index);
    }
    calcMinMaxY(e) {
        const high = e[this.highProperty];
        const low = e[this.lowProperty];
        if (high < this.mYMin)
            this.mYMin = high;
        if (high > this.mYMax)
            this.mYMax = high;
        if (low < this.mYMin)
            this.mYMin = low;
        if (low > this.mYMax)
            this.mYMax = low;
    }
}
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