plotly.js/src/components/selections/helpers.js

The open source javascript graphing library that powers plotly

'use strict';

var strTranslate = require('../../lib').strTranslate;

// in v3 (once log ranges are fixed),
// we'll be able to p2r here for all axis types
function p2r(ax, v) {
    switch(ax.type) {
        case 'log':
            return ax.p2d(v);
        case 'date':
            return ax.p2r(v, 0, ax.calendar);
        default:
            return ax.p2r(v);
    }
}

function r2p(ax, v) {
    switch(ax.type) {
        case 'log':
            return ax.d2p(v);
        case 'date':
            return ax.r2p(v, 0, ax.calendar);
        default:
            return ax.r2p(v);
    }
}

function axValue(ax) {
    var index = (ax._id.charAt(0) === 'y') ? 1 : 0;
    return function(v) { return p2r(ax, v[index]); };
}

function getTransform(plotinfo) {
    return strTranslate(
        plotinfo.xaxis._offset,
        plotinfo.yaxis._offset
    );
}

module.exports = {
    p2r: p2r,
    r2p: r2p,
    axValue: axValue,
    getTransform: getTransform
};