Ipywidgets: Document the extra space in checkbox in the ipywidgets list

[CosynPa]

As @pbugnion notes below, we should document the indent parameter in the checkbox section of the ipywidgets list in the documentation.

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Original title: extra space in checkbox
Use this code to display a checkbox in notebook. There is some leading space in the checkbox.

import ipywidgets as widgets
from IPython.display import display

check_box = widgets.Checkbox(description="abcd", value=True, layout=widgets.Layout(width="120px"))
display(check_box)

ipywidgets 7.0.1
Ubuntu FireFox 56.0

Before 7.0.1, I installed ipywidgets both in pip and conda, and I updated ipywidgets with conda, then I have to pip uninstall old ipywidgets 6.0.0 and widgetsnbextension 2.0.0. I'm not sure if this is related to this issue.

[pbugnion]

Thanks for raising this.

The checkbox supports an indent traitlet that you can set to False:

widgets.Checkbox(
    description="abcd", 
    value=True,
    indent=False
)

The rationale for having an indent is so that, when you put checkboxes in a VBox with other controls, they line up correctly:

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In terms of actions on this issue, I note that the docstring for Checkbox has information about the indent, but the documentation does not.

Maybe we should mention this in the documentation?

[jasongrout]

Maybe we should mention this in the documentation?

+1. I'll change the issue to reflect that.