Wrapping text for axis labels?

Community Support
1

Is it possible to wrap text after some width for long labels? I’ve got a big technical name that I can’t shorten without making the vis inaccurate or misleading and it’s taking up far too much space.

There doesn’t seem to be anything listed in text properties, so I’m unsure where to go from here.

Here’s a minimal example to demonstrate:

from pandas import *
from bokeh.io import show
from bokeh.models import LinearColorMapper, ColumnDataSource
from bokeh.plotting import figure
from bokeh.palettes import Viridis256

df = DataFrame({'attribute': ['long name that cant be shortened, would like to wrap text instead', 'long name that cant be shortened, would like to wrap text instead', 'long name that cant be shortened, would like to wrap text instead', 'long name that cant be shortened, would like to wrap text instead', 'Z', 'Z', 'Z', 'Z']
                , 'period': ['1', '2', '3', '4', '1', '2', '3', '4']
                , 'dimension_1': [1, 37, 44, 13, 41, 51, 18, 14]})

periods = df.period.unique().tolist()
attributes = df.attribute.unique().tolist()

source = ColumnDataSource(data=df)
color_mapper = LinearColorMapper(palette=Viridis256, low=df.dimension_1.min(),
                                 high=df.dimension_1.max())
p = figure(x_range=periods, y_range=attributes)
p.rect(x="period", y="attribute", width=1, height=1, line_color=None, source=source,
       fill_color={'field': 'dimension_1', 'transform': color_mapper})

show(p)
2

You will have to create a custom Axis subclass for that and write the wrapping logic for it yourself (of course, there are SO answers about it already). The default Axis uses fillText which supports neither wrapping nor multiline text.