Mpld3: Tooltip hover over bars (feasibility)

Created on 21 Jan 2015 · 4Comments · Source: mpld3/mpld3

Would it be easy to give bar charts a feature analogous to PointLabelTooltip? Hovering over a bar would make the tooltip appear.

Source

arnaudrenaud

Most helpful comment

You can do this with the LineLabelTooltip:

N = 10
bars = plt.bar(np.arange(N), np.random.normal(size=N))

for i, bar in enumerate(bars.get_children()):
    tooltip = mpld3.plugins.LineLabelTooltip(bar, label=str(i))
    mpld3.plugins.connect(plt.gcf(), tooltip)

mpld3.display()

It could be worth having a BarTooltip plugin that makes this easier.

aflaxman on 22 Jan 2015

👍4 🎉1

All 4 comments

You can do this with the LineLabelTooltip:

N = 10
bars = plt.bar(np.arange(N), np.random.normal(size=N))

for i, bar in enumerate(bars.get_children()):
    tooltip = mpld3.plugins.LineLabelTooltip(bar, label=str(i))
    mpld3.plugins.connect(plt.gcf(), tooltip)

mpld3.display()

It could be worth having a BarTooltip plugin that makes this easier.

aflaxman on 22 Jan 2015

👍4 🎉1

Thanks for the tip.

arnaudrenaud on 26 Jan 2015

Hi Aflaxman,

I was struggling to add tooltips to the bars using PointHTMLTooltip. After replacing it by LineLabelTooltip and understanding that bars are composed by rectangle patches it worked!
Thank you very much for that...
One more question though... How can add a customizable ccs for the LineLabelTooltip plugin? I would like to format the tooltips as left arrows (.tooltip .tooltiptext::after).
In PointHTMLTooltip I can pass the css but in LineLabelTooltip this option is not available...

Thanks