Function setHighlight

src/traces/parcoords/axisbrush.js:70–95

(d)

}

function setHighlight(d) {
    if(!d.brush.filterSpecified) {
        return '0,' + d.height;
    }

    var pixelRanges = unitToPx(d.brush.filter.getConsolidated(), d.height);
    var dashArray = [0]; // we start with a 0 length selection as filter ranges are inclusive, not exclusive
    var p, sectionHeight, iNext;
    var currentGap = pixelRanges.length ? pixelRanges[0][0] : null;
    for(var i = 0; i < pixelRanges.length; i++) {
        p = pixelRanges[i];
        sectionHeight = p[1] - p[0];
        dashArray.push(currentGap);
        dashArray.push(sectionHeight);
        iNext = i + 1;
        if(iNext < pixelRanges.length) {
            currentGap = pixelRanges[iNext][0] - p[1];
        }
    }
    dashArray.push(d.height);
    // d.height is added at the end to ensure that (1) we have an even number of dasharray points, MDN page says
    // "If an odd number of values is provided, then the list of values is repeated to yield an even number of values."
    // and (2) it's _at least_ as long as the full height (even if range is minuscule and at the bottom) though this
    // may not be necessary, maybe duplicating the last point would do too. But no harm in a longer dasharray than line.
    return dashArray;
}

function unitToPx(unitRanges, height) {
    return unitRanges.map(function(pr) {