devextreme/dist/transpiled/viz/tree_map/colorizing.gradient.js

HTML5 JavaScript Component Suite for Responsive Web Development

"use strict";

var _createColorCodeGetter = require("./colorizing").createColorCodeGetter,
    _min = Math.min,
    _max = Math.max;

function createSimpleColorizer(getColor, range) {
    return function (node) {
        return getColor(node, range);
    };
}

function getRangeData(range) {
    return [Number(range[0]) || 0, range[1] - range[0] || 1];
}

function calculateRange(nodes, getValue) {
    var i,
        ii = nodes.length,
        codes = [],
        code;

    for (i = 0; i < ii; ++i) {
        code = getValue(nodes[i]);
        if (isFinite(code)) {
            codes.push(code);
        }
    }
    return getRangeData([_min.apply(null, codes), _max.apply(null, codes)]);
}

function createGuessingColorizer(getColor, getValue) {
    var ranges = {};

    return function (node) {
        var parent = node.parent;

        return getColor(node, ranges[parent._id] || (ranges[parent._id] = calculateRange(parent.nodes, getValue)));
    };
}

function gradientColorizer(options, themeManager) {
    var palette = themeManager.createGradientPalette(options.palette),
        getValue = _createColorCodeGetter(options);

    return "range" in options ? createSimpleColorizer(getColor, getRangeData(options.range || [])) : createGuessingColorizer(getColor, getValue);

    function getColor(node, arg) {
        return palette.getColor((getValue(node) - arg[0]) / arg[1]);
    }
}

require("./colorizing").addColorizer("gradient", gradientColorizer);
module.exports = gradientColorizer;