8000 Cleanup BboxImage example. by anntzer · Pull Request #24279 · matplotlib/matplotlib · GitHub
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Cleanup BboxImage example. #24279

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merged 1 commit into from
Nov 2, 2022
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Cleanup BboxImage example. #24279

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37 changes: 9 additions & 28 deletions examples/images_contours_and_fields/demo_bboximage.py
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Original file line number Diff line number Diff line change
Expand Up @@ -7,8 +7,10 @@
a bounding box. This demo shows how to show an image inside a `.text.Text`'s
bounding box as well as how to manually create a bounding box for the image.
"""
import matplotlib.pyplot as plt

import numpy as np

import matplotlib.pyplot as plt
from matplotlib.image import BboxImage
from matplotlib.transforms import Bbox, TransformedBbox

Expand All @@ -19,24 +21,12 @@
# Create a BboxImage with Text
# ----------------------------
txt = ax1.text(0.5, 0.5, "test", size=30, ha="center", color="w")
kwargs = dict()

bbox_image = BboxImage(txt.get_window_extent,
norm=None,
origin=None,
clip_on=False,
**kwargs
)
a = np.arange(256).reshape(1, 256)/256.
bbox_image.set_data(a)
ax1.add_artist(bbox_image)
ax1.add_artist(
BboxImage(txt.get_window_extent, data=np.arange(256).reshape((1, -1))))

# ------------------------------------
# Create a BboxImage for each colormap
# ------------------------------------
a = np.linspace(0, 1, 256).reshape(1, -1)
a = np.vstack((a, a))

# List of all colormaps; skip reversed colormaps.
cmap_names = sorted(m for m in plt.colormaps if not m.endswith("_r"))

Expand All @@ -51,21 +41,12 @@

for i, cmap_name in enumerate(cmap_names):
ix, iy = divmod(i, nrow)

bbox0 = Bbox.from_bounds(ix*dx*(1 + xpad_fraction),
1. - iy*dy*(1 + ypad_fraction) - dy,
bbox0 = Bbox.from_bounds(ix*dx*(1+xpad_fraction),
1 - iy*dy*(1+ypad_fraction) - dy,
dx, dy)
bbox = TransformedBbox(bbox0, ax2.transAxes)

bbox_image = BboxImage(bbox,
cmap=cmap_name,
norm=None,
origin=None,
**kwargs
)

bbox_image.set_data(a)
ax2.add_artist(bbox_image)
ax2.add_artist(
BboxImage(bbox, cmap=cmap_name, data=np.arange(256).reshape((1, -1))))

plt.show()

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0