@nativescript-community/ui-chart/highlight/HorizontalBarHighlighter.js

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

import { BarHighlighter } from './BarHighlighter';
export class HorizontalBarHighlighter extends BarHighlighter {
    constructor(chart) {
        super(chart);
    }
    getHighlight(x, y) {
        const pos = this.getValsForTouch(x, y);
        const barData = this.mChart.barData;
        return this.getHighlightForX(pos.y, y, x).map((h) => {
            const set = barData.getDataSetByIndex(h.dataSetIndex);
            if (set.stacked) {
                return this.getStackedHighlight(h, set, x, y, pos.y, pos.x);
            }
            return h;
        });
    }
    buildHighlights(set, dataSetIndex, xVal, rounding) {
        const yKey = set.yProperty;
        const highlights = [];
        //noinspection unchecked
        let entries = set.getEntriesAndIndexesForXValue(xVal);
        if (entries.length === 0) {
            // Try to find closest x-value and take all entries for that x-value
            const closest = set.getEntryAndIndexForXValue(xVal, NaN, rounding);
            if (closest) {
                //noinspection unchecked
                entries = set.getEntriesAndIndexesForXValue(set.getEntryXValue(closest.entry, closest.index));
            }
        }
        if (entries.length === 0) {
            return highlights;
        }
        for (const r of entries) {
            const e = r.entry;
            const xVal = set.getEntryXValue(e, r.index);
            const pixels = this.mChart.getTransformer(set.axisDependency).getPixelForValues(e[yKey], xVal);
            highlights.push({
                entry: e,
                entryIndex: r.index,
                x: xVal,
                y: e[yKey],
                xPx: pixels.x,
                yPx: pixels.y,
                dataSetIndex,
                axis: set.axisDependency
            });
        }
        return highlights;
    }
    getDistance(x1, y1, x2, y2) {
        return Math.abs(y1 - y2);
    }
}
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