有没有一种方法可以以交互方式关闭python Bokeh图中的图例 [英] Is there a way to interactively turn off the legend in a python `Bokeh` plot

问题描述

在bokeh图中隐藏图例

所以我知道谁可以以编程方式关闭 Bokeh 情节中的图例，但是我想知道是否有一种交互式的方式来做到这一点?有时我在一个地块图例中有很多项目，并且图例占用了大量空间或不动产.我想知道是否可以通过单击图例将其隐藏，还是可以使用某些这样的选项?

So I understand who to programmatically turn off the legend in a Bokeh plot, however I was wondering if there is a way to do this interactively? Sometimes I have a number of items in a plot legend, and the legend takes up lot of space or real estate. I was wondering if there is a way to click on the legend to hide it, or some such option?

我知道我可以通过代码影响图例的可见性:

I know I can affect the legend visibility through the code:

 myPlot.legend.visible = False

不过，我将能够根据需要打开和关闭图例.

However I would to be able to turn the legend on and off as I wish.

推荐答案

您可以使用 CustomJS ，这是在 DoubleTap 事件上切换图例的示例:

You can use CustomJS, here is an example that toggle legend on DoubleTap event:

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

t = np.linspace(0, 4*np.pi, 100)
source = ColumnDataSource(data=dict(x=t, y1=np.sin(t), y2=np.cos(t)))
fig = figure(plot_height=250)
fig.line("x", "y1", source=source, legend="sin", line_color="red")
fig.line("x", "y2", source=source, legend="cos", line_color="green")

def show_hide_legend(legend=fig.legend[0]):
    legend.visible = not legend.visible

fig.js_on_event(events.DoubleTap, CustomJS.from_py_func(show_hide_legend))

show(fig)

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