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

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

import { ChartData } from './ChartData';
/**
 * A PieData object can only represent one DataSet. Unlike all other charts, the
 * legend labels of the PieChart are created from the x-values array, and not
 * from the DataSet labels. Each PieData object can only represent one
 * PieDataSet (multiple PieDataSets inside a single PieChart are not possible).
 *

 */
export class PieData extends ChartData {
    /**
     * Sets the PieDataSet this data object should represent.
     *
     * @param dataSet
     */
    setDataSet(dataSet) {
        this.mDataSets.splice(0);
        this.mDataSets.push(dataSet);
        this.notifyDataChanged();
    }
    /**
     * Returns the DataSet this PieData object represents. A PieData object can
     * only contain one DataSet.
     */
    getDataSet() {
        return this.mDataSets[0];
    }
    /**
     * The PieData object can only have one DataSet. Use getDataSet() method instead.
     *
     * @param index
     * @return
     */
    getDataSetByIndex(index) {
        return index === 0 ? this.getDataSet() : null;
    }
    getDataSetByLabel(label, ignoreCase) {
        return ignoreCase ? (label?.toLowerCase() === this.mDataSets[0].label?.toLowerCase() ? this.mDataSets[0] : null) : label === this.mDataSets[0].label ? this.mDataSets[0] : null;
    }
    getEntryForHighlight(highlight) {
        return this.getDataSet().getEntryForIndex(highlight.x);
    }
    /**
     * Returns the sum of all values in this PieData object.
     */
    getYValueSum() {
        const yKey = this.getDataSet().yProperty;
        let sum = 0;
        for (let i = 0; i < this.getDataSet().entryCount; i++) {
            sum += this.getDataSet().getEntryForIndex(i)[yKey];
        }
        return sum;
    }
}
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