enable onClick for bar charts with quantitative scales.

[gordonwoodhull]

title says it all.

seems to be enabled for all other charts except for line charts (where probably the dots would make the most sense).

[gordonwoodhull]

I think the answer has to do with the way selection is baked into the charts. So, since bar charts with an ordinal x axis have click-to-select, whereas charts with quantitative x axes have brush-to-select, it was implemented this way.

If you want something besides those selection modes (or don't want selection at all), it might make sense to want to override onClick.

[emiguevara]

Hey there. Was looking for an explanation for this, and just found the answer in #168
Basically, NickQiZhu decided not to implement just because. Totally random, if you ask me.
I'm working more and more with dc.js, and I love it, but I'm frustrated by these completely idiosyncratic and undocumented bits... I'd like to get into the code, but my Javascript skills are a bit shaky.

[gordonwoodhull]

@emiguevara: Sure... it was developed for a demo and became wildly popular because it provides a nice abstraction, wrapping the data. And a lot of different people contributed stuff, who all had different ideas how it should work.

So it was never really designed in any consistent way. I tell myself that I'll start over with a consistent design in 3.0, but there are a lot of charting libraries that died when someone started a rewrite, so for now I'm just trying to fix bugs. :-)

Although it's pretty easy to add this with a renderlet, I'll see about doing it automatically in 2.1. (If it conflicts with the brush, then only when brushing is off.)

[gordonwoodhull]

Question answered. Retitling.

[luukgruijs]

any updates on this? It still doesn't seem changed

[gordonwoodhull]

Nope. But dc.js is an intentionally leaky abstraction, so you can almost always work around these quirks.

chart.on('pretransition', function(chart) {
    chart.selectAll('rect.bar').on('click.yourNamespace', function(d) {
        // do stuff here - d contains the datum
    });
});

Patches welcome!

[gordonwoodhull]

The new ordinal range/focus example shows how to implement ordinal-style click-to-toggle on a linear scale chart.

I think the code should suffice for any place one wants to enable clicking instead of brushing on a bar chart. If not, we could add another example.