当用户单击第一个图上的圆圈时，我想显示简单的文本(在第二个图上)。 我盯着 bokeh 网站上显示第一个图的工作示例。
我在下面做了一些更改，以便当用户单击第一个图上的圆圈时，第二个图应显示相应的文本。 因此，当用户单击第一个图上的 (x = 1, y =2) 上的圆圈时，第二个图上显示的文本应为 ('first')
使用下面的代码，我根本看不到任何情节，也没有错误!我知道如何调试这个问题
我也愿意接受不同的方法
from bokeh.io import output_file, show
from bokeh.plotting import figure
from bokeh.models import ColumnDataSource, Plot, Range1d, Text
from bokeh.layouts import column
output_file("styling_selections.html")
source = ColumnDataSource(data=dict(x = [1,2,3],
y = [2,5,3],
name = ['first', 'second', 'third'],
))
plot = figure(plot_width=400, plot_height=400, tools="tap", title="Select a circle")
renderer = plot.circle(x= 'x', y= 'y', size=50,
# set visual properties for selected glyphs
selection_color="firebrick",
# set visual properties for non-selected glyphs
nonselection_fill_alpha=0.2,
nonselection_fill_color="blue",
nonselection_line_color="firebrick",
nonselection_line_alpha=1.0,
source = source)
def construct_text_box(source):
# Plot and axes
xdr = Range1d(0, 220)
ydr = Range1d(0, 120)
plot = Plot(
x_range=xdr,
y_range=ydr,
#title="",
plot_width=250,
plot_height=120,
min_border=0,
)
# Add the writing
country = Text(x=5, y=50, text='cpname', text_font_size='18pt', text_color="#FFFFF", text_font_style="bold")
plot.add_glyph(source, Text(), selection_glyph=country)
return plot
text_box = construct_text_box(source)
show(column(plot,text_box))
最佳答案
您的代码中存在一些错误，导致绘图无法显示。调整以下内容至少会显示两个图。然而，第二个图将只是您想要的文本相互叠加。为了获得您正在寻找的功能，我猜您需要使用回调:
# changed text parameter from cpname to name, thats the column you use
# FFFFF was white, you wouldn't see this, changed to black
country = Text(x=5, y=50, text='name', text_color="#000000")
plot.add_glyph(source, country)
如果我有时间，我稍后会研究回调部分。但这至少应该让您朝着正确的方向开始。
/e:这是一个工作示例。正如之前所怀疑的，添加回调会添加您想要的功能。棘手的部分是 JavaScript 代码。我希望评论足以理解它:
from bokeh.io import output_file, show, output_notebook, reset_output
from bokeh.plotting import figure
from bokeh.models import ColumnDataSource, Plot, Range1d, Text, TapTool, CustomJS
from bokeh.layouts import column
reset_output()
source = ColumnDataSource(data=dict(x = [1, 10, 16], y = [2, 20, 10],
name_labels = ['first', 'second', 'third'],
name_display = ['','','']
))
plot = figure(plot_width=400, plot_height=400, tools="tap", title="Select a circle")
renderer = plot.circle(x= 'x', y= 'y', size=50,
# set visual properties for selected glyphs
selection_color="firebrick",
# set visual properties for non-selected glyphs
nonselection_fill_alpha=0.2, nonselection_fill_color="blue",
nonselection_line_color="firebrick", nonselection_line_alpha=1.0,
source = source)
def construct_text_box(source):
# Plot and axes
xdr = Range1d(0, 220)
ydr = Range1d(0, 120)
plot = Plot(
x_range=xdr, y_range=ydr,
plot_height=120, min_border=0,
)
# Add the writing
country = Text(x=5, y=50, text='name_display', text_color="#000000")
plot.add_glyph(source, country)
return plot
output_notebook()
JS_CODE ="""
// Get index of current selected datapoint
sel_point_index = cb_data.source.attributes.selected["1d"]["indices"][0];
/* replace all name_display values with the name_label
value of currently selected point */
for (i=0; i < cb_data.source.data.name_labels.length; i++) {
cb_data.source.data.name_display[i] = cb_data.source.data.name_labels[sel_point_index];
}
cb_data.source.change.emit();
"""
newtaptool = plot.select(type=TapTool)
newtaptool.callback = CustomJS(code=JS_CODE)
text_box = construct_text_box(source)
show(column(plot, text_box))
关于python - Bokeh - 点击时显示相应的文本，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49803577/