Using a subfigure as textbody fails on tight layout with a lot of text-CodePudding

Using a subfigure as textbody fails on tight layout with a lot of text. As seen in the provided example, the bound of a figure are overreached by one subfigure, as if the text was not wrapped.

import pandas as pd
from matplotlib import pyplot as plt

# Paramters for A4 Paper
fullheight = 11.69
fullwidth = 8.27

# how the subfigures dive the space
fig0_factor = 0.7
fig1_factor = 0.3

# generate the figure
fig = plt.figure(constrained_layout = True, figsize=(fullwidth, fullheight)) # 

# generate 2 subfigures
subfigs = fig.subfigures(2,height_ratios=[fig0_factor,fig1_factor])


# fill the fist subfigure
axes = subfigs[0].subplots(nrows=1)
# some plot
ax = plt.plot([0,0],[-1,1], lw=1, c='b', figure=subfigs[0])
# some text
subfigs[0].text(0.55, 0.00001, 'Figure 1', ha='center', va='center', rotation='horizontal',weight='bold')

# fill the second subfigure
text_ax = subfigs[1].subplots(1)
# make its background transparent
subfigs[1].patch.set_alpha(0.0)
# remove the axis, not removing it makes no difference regarding the problem
text_ax.set_axis_off()

# generate some text
message = ['word']*50 # 50 is enough to make the problem visable, my usecase has a way longer text
message = ' '.join(message)    

# fill in the Text and wrap it
text_ax.text(0.00001, 0.8, message, horizontalalignment='left', verticalalignment='top',size=7, wrap=True)


# call tight layout
# this is neccecary for the whole plot, that is not shown for simplicity reasons
# explaination: subfigure one would be an array of subplots with different scales and descriptions, 
#               ever changing depending on the data that is to be plotted, so tight_layout mittigates
#               a lot of tideos formatting
fig.tight_layout()

Please notice the figures right edge reaches for the whole panel, as seen in the second image

# omitting the wrap, it is clear why the figure is out of bound: somehow the layout gets its information from the unwrapped text
text_ax.text(0.00001, 0.8, message, horizontalalignment='left', verticalalignment='top',size=7, wrap=False)

Is there another way to have the text rendered in the subplot with it correctly noticing the wrapped bounds instead of the unwrapped bounds?

CodePudding user response：

If you modify your code above to remove fig.tight_layout() and to take the text out of the layout then everything works as expected.

# fill in the Text and wrap it
thetext = text_ax.text(0.00001, 0.8, message, horizontalalignment='left',
             verticalalignment='top',size=7, wrap=True)
thetext.set_in_layout(False)

There should be nothing that tight_layout does that layout='constrained' cannot do, and constrained layout is much more flexible.

BTW, you might consider subfigs[0].supxlabel() instead of the text command for "Figure 1"