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"""Tools for enabling and registering chart themes"""
from ...utils.theme import ThemeRegistry
VEGA_THEMES = [
"ggplot2",
"quartz",
"vox",
"fivethirtyeight",
"dark",
"latimes",
"urbaninstitute",
"excel",
"googlecharts",
"powerbi",
]
class VegaTheme:
"""Implementation of a builtin vega theme."""
def __init__(self, theme):
self.theme = theme
def __call__(self):
return {
"usermeta": {"embedOptions": {"theme": self.theme}},
"config": {"view": {"continuousWidth": 300, "continuousHeight": 300}},
}
def __repr__(self):
return "VegaTheme({!r})".format(self.theme)
# The entry point group that can be used by other packages to declare other
# renderers that will be auto-detected. Explicit registration is also
# allowed by the PluginRegistery API.
ENTRY_POINT_GROUP = "altair.vegalite.v5.theme" # type: str
themes = ThemeRegistry(entry_point_group=ENTRY_POINT_GROUP)
themes.register(
"default",
lambda: {"config": {"view": {"continuousWidth": 300, "continuousHeight": 300}}},
)
themes.register(
"opaque",
lambda: {
"config": {
"background": "white",
"view": {"continuousWidth": 300, "continuousHeight": 300},
}
},
)
themes.register("none", lambda: {})
for theme in VEGA_THEMES:
themes.register(theme, VegaTheme(theme))
themes.enable("default")
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