Function countVisibleTraces

test/jasmine/tests/map_test.js:1338–1366

(gd, modes)

    });

    function countVisibleTraces(gd, modes) {
        var mapInfo = getMapInfo(gd);
        var cnts = [];

        // 'modes' are the ScatterMap layers names
        // e.g. 'fill', 'line', 'circle', 'symbol'

        modes.forEach(function(mode) {
            var cntPerMode = 0;

            mapInfo.traceLayers.forEach(function(l) {
                var info = mapInfo.layers[l];

                if(l.indexOf(mode) === -1) return;
                if(info.visibility === 'visible') cntPerMode++;
            });

            cnts.push(cntPerMode);
        });

        var cnt = cnts.reduce(function(a, b) {
            return (a === b) ? a : null;
        });

        // returns null if not all counter per mode are the same,
        // returns the counter if all are the same.

        return cnt;
    }

    function getStyle(gd, mode, prop) {
        var mapInfo = getMapInfo(gd);