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Don't use ImageGrid in demo_text_rotation_mode. #15281

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Apr 23, 2021
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Don't use ImageGrid in demo_text_rotation_mode. #15281

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77 changes: 42 additions & 35 deletions examples/text_labels_and_annotations/demo_text_rotation_mode.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,62 +17,69 @@
the bounding box of the rotated text.
- ``rotation_mode='anchor'`` aligns the unrotated text and then rotates the
text around the point of alignment.

"""

import matplotlib.pyplot as plt
from mpl_toolkits.axes_grid1.axes_grid import ImageGrid
import numpy as np


def test_rotation_mode(fig, mode, subplot_location):
ha_list = ["left", "center", "right"]
va_list = ["top", "center", "baseline", "bottom"]
grid = ImageGrid(fig, subplot_location,
nrows_ncols=(len(va_list), len(ha_list)),
share_all=True, aspect=True, cbar_mode=None)
axs = np.empty((len(va_list), len(ha_list)), object)
gs = subplot_location.subgridspec(*axs.shape, hspace=0, wspace=0)
axs[0, 0] = fig.add_subplot(gs[0, 0])
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this part would be slightly easier with something like #14421 available.

for i in range(len(va_list)):
for j in range(len(ha_list)):
if (i, j) == (0, 0):
continue # Already set.
axs[i, j] = fig.add_subplot(
gs[i, j], sharex=axs[0, 0], sharey=axs[0, 0])
for ax in axs.flat:
ax.set(aspect=1)

# labels and title
for ha, ax in zip(ha_list, grid.axes_row[-1]):
ax.axis["bottom"].label.set_text(ha)
for va, ax in zip(va_list, grid.axes_column[0]):
ax.axis["left"].label.set_text(va)
grid.axes_row[0][1].set_title(f"rotation_mode='{mode}'", size="large")
for ha, ax in zip(ha_list, axs[-1, :]):
ax.set_xlabel(ha)
for va, ax in zip(va_list, axs[:, 0]):
ax.set_ylabel(va)
axs[0, 1].set_title(f"rotation_mode='{mode}'", size="large")

if mode == "default":
kw = dict()
else:
kw = dict(
bbox=dict(boxstyle="square,pad=0.", ec="none", fc="C1", alpha=0.3))
kw = (
{} if mode == "default" else
{"bbox": dict(boxstyle="square,pad=0.", ec="none", fc="C1", alpha=0.3)}
)

# use a different text alignment in each axes
texts = []
for (va, ha), ax in zip([(x, y) for x in va_list for y in ha_list], grid):
# prepare axes layout
for axis in ax.axis.values():
axis.toggle(ticks=False, ticklabels=False)
ax.axvline(0.5, color="skyblue", zorder=0)
ax.axhline(0.5, color="skyblue", zorder=0)
ax.plot(0.5, 0.5, color="C0", marker="o", zorder=1)

# add text with rotation and alignment settings
tx = ax.text(0.5, 0.5, "Tpg",
size="x-large", rotation=40,
horizontalalignment=ha, verticalalignment=va,
rotation_mode=mode, **kw)
texts.append(tx)
for i, va in enumerate(va_list):
for j, ha in enumerate(ha_list):
ax = axs[i, j]
# prepare axes layout
ax.set(xticks=[], yticks=[])
ax.axvline(0.5, color="skyblue", zorder=0)
ax.axhline(0.5, color="skyblue", zorder=0)
ax.plot(0.5, 0.5, color="C0", marker="o", zorder=1)
# add text with rotation and alignment settings
tx = ax.text(0.5, 0.5, "Tpg",
size="x-large", rotation=40,
horizontalalignment=ha, verticalalignment=va,
rotation_mode=mode, **kw)

if mode == "default":
# highlight bbox
fig.canvas.draw()
for ax, tx in zip(grid, texts):
bb = tx.get_window_extent().transformed(ax.transData.inverted())
for ax in axs.flat:
text, = ax.texts
bb = text.get_window_extent().transformed(ax.transData.inverted())
rect = plt.Rectangle((bb.x0, bb.y0), bb.width, bb.height,
facecolor="C1", alpha=0.3, zorder=2)
ax.add_patch(rect)


fig = plt.figure(figsize=(8, 6))
test_rotation_mode(fig, "default", 121)
test_rotation_mode(fig, "anchor", 122)
fig = plt.figure(figsize=(8, 5))
gs = fig.add_gridspec(1, 2)
test_rotation_mode(fig, "default", gs[0])
test_rotation_mode(fig, "anchor", gs[1])
plt.show()


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