# Copyright 2016-present CERN – European Organization for Nuclear Research
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#
# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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import matplotlib as mpl
from qf_lib.containers.series.qf_series import QFSeries
from qf_lib.plotting.decorators.chart_decorator import ChartDecorator
[docs]class BarValuesDecorator(ChartDecorator):
"""
Adds values next to each bar on the bar chart.
Parameters
----------
series: QFSeries
series that is going to be decorated by the cone
key: str
see ChartDecorator.key.__init__#key
"""
def __init__(self, series: QFSeries, key: str = None):
super().__init__(key)
self.series = series
[docs] def decorate(self, chart: "Chart") -> None:
font_size = mpl.rcParams['legend.fontsize']
max_val = self.series.abs().max()
space = max_val * 0.02
for i, v in self.series.items():
if v < 0:
x = space
else:
x = v + space
chart.axes.text(x, i, '{:0.1%}'.format(v), verticalalignment='center', size=font_size)
# move the right limit of the x axis because some labels might go beyond the chart
_, x_max = chart.axes.get_xlim()
chart.axes.set_xlim(right=x_max + 7 * space)