我试图设置散景图,用户可以点击图表添加一个点。我已经看到this example使用BoxSelectTool
将Rect
字形添加到绘图中,但是我正在寻找一种方法来添加以点击位置为中心的圆形字形。我还想将这些要点发送回服务器端。有没有经验做类似的事情?
答案 0 :(得分:3)
这适用于Bokeh版本0.12.13:
from bokeh.plotting import figure
from bokeh.models import ColumnDataSource, Column
from bokeh.io import curdoc
from bokeh.events import DoubleTap
coordList=[]
TOOLS = "tap"
bound = 10
p = figure(title='Double click to leave a dot.',
tools=TOOLS,width=700,height=700,
x_range=(-bound, bound), y_range=(-bound, bound))
source = ColumnDataSource(data=dict(x=[], y=[]))
p.circle(source=source,x='x',y='y')
#add a dot where the click happened
def callback(event):
Coords=(event.x,event.y)
coordList.append(Coords)
source.data = dict(x=[i[0] for i in coordList], y=[i[1] for i in coordList])
p.on_event(DoubleTap, callback)
layout=Column(p)
curdoc().add_root(layout)
(运行它将此脚本保存为something.py并在cmd中运行:散景服务于something.py - show)