更新时间:2023-12-05 16:45:52
假设用户已经在视图中看到了一个图,一个选择是在图范围的 start
属性上设置一个回调,因此当情节更新时将触发它.
Assuming the user already have a plot in view one option would be to set a callback on the start
attribute of the plot's range so it will be triggered when the plot gets updated.
from bokeh.models import CustomJS
p = figure()
def python_callback()
p.y_range = Range1d(None, None)
# get your data here and update the plot
code = "document.getElementById('message_display').innerHTML = 'loading finished';"
callback = CustomJS(args = dict(), code = code)
p.y_range.js_on_change('start', callback)
请参见下面的工作示例:
See working example below:
import numpy as np
from bokeh.plotting import figure, show
from bokeh.models import CustomJS, ColumnDataSource
points = np.random.rand(50, 2)
cds = ColumnDataSource(data = dict(x = points[:, 0], y = points[:, 1]))
p = figure(x_range = (0, 1), y_range = (0, 1))
p.scatter(x = 'x', y = 'y', source = cds)
cb_to_make_selection = CustomJS(args = {'cds': cds}, code = """
function getRandomInt(max){return Math.floor(Math.random() * Math.floor(max));}
cds.selected.indices = [getRandomInt(cds.get_length()-1)]
""")
p.x_range.js_on_change('start', cb_to_make_selection)
show(p)