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"""
Interactive Chart with Cross-Highlight
======================================
This example shows an interactive chart where selections in one portion of
the chart affect what is shown in other panels. Click on the bar chart to
see a detail of the distribution in the upper panel.
"""
# category: interactive charts
import altair as alt
from vega_datasets import data
source = data.movies.url
pts = alt.selection_point(encodings=['x'])
rect = alt.Chart(data.movies.url).mark_rect().encode(
alt.X('IMDB_Rating:Q', bin=True),
alt.Y('Rotten_Tomatoes_Rating:Q', bin=True),
alt.Color('count()',
scale=alt.Scale(scheme='greenblue'),
legend=alt.Legend(title='Total Records')
)
)
circ = rect.mark_point().encode(
alt.ColorValue('grey'),
alt.Size('count()',
legend=alt.Legend(title='Records in Selection')
)
).transform_filter(
pts
)
bar = alt.Chart(source).mark_bar().encode(
x='Major_Genre:N',
y='count()',
color=alt.condition(pts, alt.ColorValue("steelblue"), alt.ColorValue("grey"))
).properties(
width=550,
height=200
).add_params(pts)
alt.vconcat(
rect + circ,
bar
).resolve_legend(
color="independent",
size="independent"
)
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