Disallow log scale for discrete bar charts

[sophiamersmann]

Description

Plotting discrete bar charts and stacked discrete bar charts on a log scale is confusing since it's not immediately clear that what you see is plotted on a log scale. The bar lengths might be misinterpreted by a user as a result.

Expected behaviour

We should disallow log scale for discrete bar charts and stacked discrete bar charts.

We could also make it more obvious that the data is plotted on a log scale, but I can't think of a compelling use case for allowing bar charts on a log scale.

For discrete and stacked discrete bar charts, simply don't show the log/linear toggle. We currently don't have any bar charts that are on a log scale by default.

For line charts (that turn into a discrete bar chart):

• Hide the log/linear toggle when a discrete bar chart is viewed
• Changing to a discrete bar chart after selecting a log scale is ok for now, I think
  • Since the timeline is the only way to get to a discrete bar chart, it would be confusing if we sometimes allowed, sometimes disallowed single-year mode (depending on the current chart settings)
  • If we add a Bar chart tab for line charts, then we could hide the bar chart tab when the line chart is plotted on a log scale

Additional context

Queries

select c.id, cc.chartType, cc.slug
from charts c
join chart_configs cc on c.configId = cc.id
where
    (cc.chartType = 'DiscreteBar' or cc.chartType = 'StackedDiscreteBar')
    and cc.full ->> '$.yAxis.scaleType' = 'log';

select c.id, cc.chartType, cc.slug
from charts c
join chart_configs cc on c.configId = cc.id
where
    cc.chartType = 'LineChart'
    and cc.full ->> '$.yAxis.scaleType' = 'log' and cc.full ->> '$.minTime' = cc.full ->> '$.maxTime';

select c.id, cc.chartType, cc.slug
from charts c
join chart_configs cc on c.configId = cc.id
where
    (cc.chartType = 'DiscreteBar' or cc.chartType = 'StackedDiscreteBar') and
    cc.full ->> '$.yAxis.canChangeScaleType' = 'true';