def render(df: pd.DataFrame) -> Figure:
from bokeh.models import HoverTool
from bokeh.palettes import Category10_10
from bokeh.plotting import ColumnDataSource
p = Figure(plot_width=1200, plot_height=600, x_axis_type='datetime')
names = [x for x in df.columns.tolist() if x not in ('date', 'zeros')]
source = ColumnDataSource(df)
p.varea_stack(stackers=names,
x='date',
color=Category10_10[:len(names)],
legend_label=names,
source=source)
p.line(x='date', y='zeros', line_alpha=0, source=source)
p.legend.location = 'top_left'
p.add_tools(
HoverTool(tooltips=[('date', '@date{%Y-%m-%d}')] + [(x, f'@{x}')
for x in names],
formatters={'@date': 'datetime'},
mode='vline'))
return p
