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"""
==========
Hatch demo
==========
Hatches can be added to most polygons in Matplotlib, including `~.Axes.bar`,
`~.Axes.fill_between`, `~.Axes.contourf`, and children of `~.patches.Polygon`.
They are currently supported in the PS, PDF, SVG, macosx, and Agg backends. The WX
and Cairo backends do not currently support hatching.
See also :doc:`/gallery/images_contours_and_fields/contourf_hatching` for
an example using `~.Axes.contourf`, and
:doc:`/gallery/shapes_and_collections/hatch_style_reference` for swatches
of the existing hatches.
"""
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.patches import Ellipse, Polygon
x = np.arange(1, 5)
y1 = np.arange(1, 5)
y2 = np.ones(y1.shape) * 4
fig = plt.figure()
axs = fig.subplot_mosaic([['bar1', 'patches'], ['bar2', 'patches']])
axs['bar1'].bar(x, y1, edgecolor='black', hatch="/")
axs['bar1'].bar(x, y2, bottom=y1, edgecolor='black', hatch='//')
axs['bar2'].bar(x, y1, edgecolor='black', hatch=['--', '+', 'x', '\\'])
axs['bar2'].bar(x, y2, bottom=y1, edgecolor='black',
hatch=['*', 'o', 'O', '.'])
x = np.arange(0, 40, 0.2)
axs['patches'].fill_between(x, np.sin(x) * 4 + 30, y2=0,
hatch='///', zorder=2, fc='c')
axs['patches'].add_patch(Ellipse((4, 50), 10, 10, fill=True,
hatch='*', facecolor='y'))
axs['patches'].add_patch(Polygon([(10, 20), (30, 50), (50, 10)],
hatch='\\/...', facecolor='g'))
axs['patches'].set_xlim([0, 40])
axs['patches'].set_ylim([10, 60])
axs['patches'].set_aspect(1)
plt.show()
# %%
#
# .. admonition:: References
#
# The use of the following functions, methods, classes and modules is shown
# in this example:
#
# - `matplotlib.patches`
# - `matplotlib.patches.Ellipse`
# - `matplotlib.patches.Polygon`
# - `matplotlib.axes.Axes.add_patch`
# - `matplotlib.patches.Patch.set_hatch`
# - `matplotlib.axes.Axes.bar` / `matplotlib.pyplot.bar`
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