python-3.x - Bokeh:隐藏图例上的某些内容时更新缩放图

Question

我在 Bokeh 中有以下图表:

我想知道 Bokeh 库中是否有一些命令允许我在隐藏图例上的某些系列时更新 y 轴(或框缩放我的图)。示例:当我隐藏图例中的第一对条形时，我希望结果如下:

Answer 1

这是一个例子:

进口:

from bokeh.models import ColumnDataSource, Legend, CustomJS
from bokeh.plotting import figure
from bokeh.io import show, output_notebook
import numpy as np
output_notebook()

抽奖代码:

x = np.linspace(0, 4*np.pi, 100)
y1 = np.sin(x)
y2 = y1 + 1.2
y3 = 0.1 * x**2
fig = figure(plot_height=250)
source = ColumnDataSource(data=dict(x=x, y1=y1, y2=y2, y3=y3))

line1 = fig.line("x", "y1", source=source, legend="Y1", color="red", line_width=3)
line2 = fig.line("x", "y2", source=source, legend="Y2", color="green", line_width=3)
line3 = fig.line("x", "y3", source=source, legend="Y3", color="blue", line_width=3)

legend = fig.legend[0]
legend.click_policy = "hide"

def callback(fig=fig, legend=fig.legend[0]):
    y_range = fig.y_range
    y_range.have_updated_interactively = False
    y_range.renderers = [item.renderers[0] for item in legend.items if item.renderers[0].visible]
    Bokeh.index[fig.id].plot_canvas_view.update_dataranges()

for item in legend.items:
    item.renderers[0].js_on_change("visible", CustomJS.from_py_func(callback))

show(fig)

结果:

http://nbviewer.jupyter.org/gist/ruoyu0088/8e2d5fb768ee837d3cb59943f944c61f