Function calcLevels

src/components/colorbar/draw.js:902–951

(gd, opts, zrange)

}

function calcLevels(gd, opts, zrange) {
    var levelsIn = opts._levels;
    var lineLevels = [];
    var fillLevels = [];
    var l;
    var i;

    var l0 = levelsIn.end + levelsIn.size / 100;
    var ls = levelsIn.size;
    var zr0 = (1.001 * zrange[0] - 0.001 * zrange[1]);
    var zr1 = (1.001 * zrange[1] - 0.001 * zrange[0]);

    for(i = 0; i < 1e5; i++) {
        l = levelsIn.start + i * ls;
        if(ls > 0 ? (l >= l0) : (l <= l0)) break;
        if(l > zr0 && l < zr1) lineLevels.push(l);
    }

    if(opts._fillgradient) {
        fillLevels = [0];
    } else if(typeof opts._fillcolor === 'function') {
        var fillLevelsIn = opts._filllevels;

        if(fillLevelsIn) {
            l0 = fillLevelsIn.end + fillLevelsIn.size / 100;
            ls = fillLevelsIn.size;
            for(i = 0; i < 1e5; i++) {
                l = fillLevelsIn.start + i * ls;
                if(ls > 0 ? (l >= l0) : (l <= l0)) break;
                if(l > zrange[0] && l < zrange[1]) fillLevels.push(l);
            }
        } else {
            fillLevels = lineLevels.map(function(v) {
                return v - levelsIn.size / 2;
            });
            fillLevels.push(fillLevels[fillLevels.length - 1] + levelsIn.size);
        }
    } else if(opts._fillcolor && typeof opts._fillcolor === 'string') {
        // doesn't matter what this value is, with a single value
        // we'll make a single fill rect covering the whole bar
        fillLevels = [0];
    }

    if(levelsIn.size < 0) {
        lineLevels.reverse();
        fillLevels.reverse();
    }

    return {line: lineLevels, fill: fillLevels};
}

function mockColorBarAxis(gd, opts, zrange) {
    var fullLayout = gd._fullLayout;