fireInternet/res/highcharts/code/es-modules/parts-map/MapAxis.js

/**
 * (c) 2010-2019 Torstein Honsi
 *
 * License: www.highcharts.com/license
 */

'use strict';

import H from '../parts/Globals.js';
import '../parts/Utilities.js';
import '../parts/Axis.js';

var addEvent = H.addEvent,
    Axis = H.Axis,
    pick = H.pick;

// Override to use the extreme coordinates from the SVG shape, not the data
// values
addEvent(Axis, 'getSeriesExtremes', function () {
    var xData = [];

    // Remove the xData array and cache it locally so that the proceed method
    // doesn't use it
    if (this.isXAxis) {
        this.series.forEach(function (series, i) {
            if (series.useMapGeometry) {
                xData[i] = series.xData;
                series.xData = [];
            }
        });
        this.seriesXData = xData;
    }

});

addEvent(Axis, 'afterGetSeriesExtremes', function () {

    var xData = this.seriesXData,
        dataMin,
        dataMax,
        useMapGeometry;

    // Run extremes logic for map and mapline
    if (this.isXAxis) {
        dataMin = pick(this.dataMin, Number.MAX_VALUE);
        dataMax = pick(this.dataMax, -Number.MAX_VALUE);
        this.series.forEach(function (series, i) {
            if (series.useMapGeometry) {
                dataMin = Math.min(dataMin, pick(series.minX, dataMin));
                dataMax = Math.max(dataMax, pick(series.maxX, dataMax));
                series.xData = xData[i]; // Reset xData array
                useMapGeometry = true;
            }
        });
        if (useMapGeometry) {
            this.dataMin = dataMin;
            this.dataMax = dataMax;
        }

        delete this.seriesXData;
    }

});

// Override axis translation to make sure the aspect ratio is always kept
addEvent(Axis, 'afterSetAxisTranslation', function () {
    var chart = this.chart,
        mapRatio,
        plotRatio = chart.plotWidth / chart.plotHeight,
        adjustedAxisLength,
        xAxis = chart.xAxis[0],
        padAxis,
        fixTo,
        fixDiff,
        preserveAspectRatio;

    // Check for map-like series
    if (this.coll === 'yAxis' && xAxis.transA !== undefined) {
        this.series.forEach(function (series) {
            if (series.preserveAspectRatio) {
                preserveAspectRatio = true;
            }
        });
    }

    // On Y axis, handle both
    if (preserveAspectRatio) {

        // Use the same translation for both axes
        this.transA = xAxis.transA = Math.min(this.transA, xAxis.transA);

        mapRatio = plotRatio /
            ((xAxis.max - xAxis.min) / (this.max - this.min));

        // What axis to pad to put the map in the middle
        padAxis = mapRatio < 1 ? this : xAxis;

        // Pad it
        adjustedAxisLength = (padAxis.max - padAxis.min) * padAxis.transA;
        padAxis.pixelPadding = padAxis.len - adjustedAxisLength;
        padAxis.minPixelPadding = padAxis.pixelPadding / 2;

        fixTo = padAxis.fixTo;
        if (fixTo) {
            fixDiff = fixTo[1] - padAxis.toValue(fixTo[0], true);
            fixDiff *= padAxis.transA;
            if (
                Math.abs(fixDiff) > padAxis.minPixelPadding ||
                (
                    padAxis.min === padAxis.dataMin &&
                    padAxis.max === padAxis.dataMax
                )
            ) { // zooming out again, keep within restricted area
                fixDiff = 0;
            }
            padAxis.minPixelPadding -= fixDiff;
        }
    }
});

// Override Axis.render in order to delete the fixTo prop
addEvent(Axis, 'render', function () {
    this.fixTo = null;
});