Inverted style causes problems

[techtonik]

This doesn't work as expected:

def bottom_toolbar():
    return FormattedText([
        ("fg:white bg:black", "F1 Help"),
    ])

Produces:

I thought FormattedText should somehow validate the params.

[techtonik]

Looks like params are understood, but are inverted.

[jonathanslenders]

Hi @techtonik,

Yes, this is because the "reverse" flag is set for the bottom-toolbar style. See: https://github.com/jonathanslenders/python-prompt-toolkit/blob/a4a010e4e4bf08755ed1efd587de34843cfe2f07/prompt_toolkit/styles/defaults.py#L129

You can override this by passing a style that doesn't use reverse here:

style = Style.from_dict({'bottom-toolbar': 'noreverse'});

The reason we use reverse here is because it works well for terminals with both a light and dark background.

[techtonik]

OMG. Spent so much time on this issue. But now I know this software better. =)

[techtonik]

I think documented this behavior is enough to close this issue. Need to look for a place to document bottom_toolbar and explain that it is a widget with style and behavior that anybody can create. Maybe a tutorial how to create such bar from scratch could be useful. Then people can compare with existing.

[techtonik]

Actually, it is documented here http://python-prompt-toolkit.readthedocs.io/en/stable/pages/asking_for_input.html#adding-a-bottom-toolbar but I missed that.