On Apr 23, 2018, at 10:07, Angelo Fausti <[email protected]> wrote:
Hi Meir,
it is not possible to position glyphs directly using screen coordinates. Alternatively, you could use a secondary y-axis (https://bokeh.pydata.org/en/latest/docs/user_guide/plotting.html#twin-axes\) and use a callback to always reset the secondary y-axis range. Something like this:
p.add_layout(LinearAxis(y_range_name='events', axis_label='Events'), 'right')
p.extra_y_ranges = {'events': Range1d(start=0, end=1)}
# make sure you have 'events_y' in your CDS perhaps a list filled with '0.5'
p.circle(x='time', y='events_y', y_range_name='events', source=cds, size=20
# This callback is used to reset the range of the secondary y-axis range
# to its original value
args = {'range': p.extra_y_ranges['events']}
code = """
range.start = 0;
range.end = 1;
"""
callback = CustomJS(args=args, code=code)
p.extra_y_ranges['events'].js_on_change('start', callback)
best,
Angelo Fausti
On Mon, Apr 23, 2018 at 3:02 AM, Meir Tseitlin <[email protected]> wrote:
I have time-series plots displayed and on the the plot I want to add a representation of different "Events" happened.
I think that the best way to visualize events is with circle glyph which will show event information with Hover tool.
Yet "events" don't have Y value (only their time), so the best way would be to have a constant Y location on plot and move them only on X (when the plot is moved/zooms).
This can be achieved with Labels and I wonder if the same can somehow be applied for Glyphs.
Thanks
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