Mouse vertical line on linked plots

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3

Small working example attached.

cross_hair.py (1.21 KB)

···

On 2017-09-13 15:39, Web Busino wrote:

Hi Alessandro,

    I have multiple plots with the same time-axis (x) but with a

specific offset between the different plots.
And I needed a tool to inspect data in the different plots.

    I used a simple segment ()

to draw a vertical line on each plot.
Added a DataSource and use it as source of the segment in all
plots.
To get the the mouse-position data I use the HoverTool ()
and define a callback, that is updating the datasource.
Here are some codesnippets that could be useful. (The tool was
implemented 1 year ago. I think some syntax have to be
changed!!!)

# Define a DataSource
data = dict(x=[0]*n_plots)
line_source = ColumnDataSource(data=data)
js = '''
var geometry = cb_data['geometry'];
$.each(poi_time_shift, function(key, value){
  line_source.data[key] = [geometry.x];
});
line_source.trigger('change');
'''
# Add a segment to the plot
for plot in plots:
  plot.segment(x0='x', y0=0, x1='x', y1=2000, line_width=1,
source=line_source)
  hover = HoverTool(tooltips=None, point_policy='follow_mouse',
callback=CustomJS(code=js, args={'line_source': line_source}))

Hope this helps.

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http://bokeh.pydata.org/en/latest/docs/reference/models/glyphs/segment.html

http://bokeh.pydata.org/en/latest/docs/reference/models/tools.html#bokeh.models.tools.HoverTool

    On 2017-09-13 14:48, Alessandro

Pocaterra wrote:

      I have 2 linked plots, so they zoom and pan

together.

        I would like to show a vertical line based on mouse

position (the green one in the attached image) on both of
them.

        Is there an example of this somewhere?

Thank you in advance

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