DC.js - deselect feature or filter all but the ones that are clicked

Question

I\'m not sure if this is possible and no luck on researching this. I\'m working on a dashboard using DC.js charts and crossfilter.js. I\'m going to use a Row chart as an example

Answer 1

I'm using this on the rowcharts where I need this feature.
It's a little bit shorter than the other answer, maybe it can be useful to someone (I don't know which is better).

    // select only one category at a time
    mychart.onClick = function(_chart){ return function (d) {
        var filter = _chart.keyAccessor()(d);
        dc.events.trigger(function () {
            _chart.filter(null);
            _chart.filter(filter);
            _chart.redrawGroup();
        });
    }; }(mychart)

Where mychart is the name of your dc.rowchart

    var mychart = dc.rowChart('#mychart');

[EDIT]

This one works too, is shorter, and works with barcharts

    mychart.addFilterHandler(function (filters, filter) {
        filters.length = 0; // empty the array
        filters.push(filter);
        return filters;
    });