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Fix usetex_baseline_test. #16373

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Feb 11, 2020
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Fix usetex_baseline_test. #16373

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40 changes: 19 additions & 21 deletions examples/text_labels_and_annotations/usetex_baseline_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,62 +8,60 @@
import matplotlib.pyplot as plt
import matplotlib.axes as maxes

from matplotlib import rcParams
rcParams['text.usetex'] = True

plt.rcParams.update({"mathtext.fontset": "cm", "mathtext.rm": "serif"})

class Axes(maxes.Axes):

@maxes.subplot_class_factory
class LatexPreviewSubplot(maxes.Axes):
"""
A hackish way to simultaneously draw texts w/ usetex=True and
usetex=False in the same figure. It does not work in the ps backend.
A hackish way to simultaneously draw texts with text.latex.preview=True and
text.latex.preview=False in the same figure. It does not work with the ps
backend.
"""

def __init__(self, *args, usetex=False, preview=False, **kwargs):
self.usetex = usetex
def __init__(self, *args, preview=False, **kwargs):
self.preview = preview
super().__init__(*args, **kwargs)

def draw(self, renderer):
with plt.rc_context({"text.usetex": self.usetex,
"text.latex.preview": self.preview}):
with plt.rc_context({"text.latex.preview": self.preview}):
super().draw(renderer)


subplot = maxes.subplot_class_factory(Axes)


def test_window_extent(ax, usetex, preview):

va = "baseline"
ax.xaxis.set_visible(False)
ax.yaxis.set_visible(False)

text_kw = dict(va=va,
size=50,
bbox=dict(pad=0., ec="k", fc="none"))

test_strings = ["lg", r"$\frac{1}{2}\pi$",
r"$p^{3^A}$", r"$p_{3_2}$"]

ax.axvline(0, color="r")

for i, s in enumerate(test_strings):

ax.axhline(i, color="r")
ax.text(0., 3 - i, s, **text_kw)
ax.text(0., 3 - i, s,
usetex=usetex,
verticalalignment="baseline",
size=50,
bbox=dict(pad=0, ec="k", fc="none"))

ax.set_xlim(-0.1, 1.1)
ax.set_ylim(-.8, 3.9)

ax.set_title("usetex=%s\npreview=%s" % (str(usetex), str(preview)))
title = f"usetex={usetex}\n"
if usetex:
title += f"preview={preview}"
ax.set_title(title)


fig = plt.figure(figsize=(2 * 3, 6.5))

for i, usetex, preview in [[0, False, False],
[1, True, False],
[2, True, True]]:
ax = subplot(fig, 1, 3, i + 1, usetex=usetex, preview=preview)
ax = LatexPreviewSubplot(fig, 1, 3, i + 1, preview=preview)
fig.add_subplot(ax)
fig.subplots_adjust(top=0.85)

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