8000 Separates edgecolor from hatchcolor (#28104) · matplotlib/matplotlib@c11175d · GitHub
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Separates edgecolor from hatchcolor (#28104)
* separated hatchcolor from edgecolor in patches * fixed logic for inherit in collections * added a gallery example * made suggested changes * reverted use of `inherit` * fixed the logic for inheriting from edgecolor * fixed docs and enhanced tests * Apply suggestions from code review Co-authored-by: Tim Hoffmann <2836374+timhoffm@users.noreply.github.com> * made suggested changes * minor fix * use 'edge' instead of 'inherit' * fix rcsetup * enhanced docs and added note for follow-up PR * Made suggested changes * made suggested changes * enhanced tests and minor fix in docs * minor changes to docs * Changed wording and alt text * Minor Fix --------- Co-authored-by: anTon <138380708+r3kste@users.noreply.github.com> Co-authored-by: Tim Hoffmann <2836374+timhoffm@users.noreply.github.com>
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‎doc/users/next_whats_new/separated_hatchcolor.rst‎

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Separated ``hatchcolor`` from ``edgecolor``
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-------------------------------------------
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When the *hatchcolor* parameter is specified, it will be used for the hatch.
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If it is not specified, it will fall back to using :rc:`hatch.color`.
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The special value 'edge' uses the patch edgecolor, with a fallback to
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:rc:`patch.edgecolor` if the patch edgecolor is 'none'.
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Previously, hatch colors were the same as edge colors, with a fallback to
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:rc:`hatch.color` if the patch did not have an edge color.
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.. plot::
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:include-source: true
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:alt: Four Rectangle patches, each displaying the color of hatches in different specifications of edgecolor and hatchcolor. Top left has hatchcolor='black' representing the default value when both hatchcolor and edgecolor are not set, top right has edgecolor='blue' and hatchcolor='black' which remains when the edgecolor is set again, bottom left has edgecolor='red' and hatchcolor='orange' on explicit specification and bottom right has edgecolor='green' and hatchcolor='green' when the hatchcolor is not set.
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import matplotlib as mpl
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import matplotlib.pyplot as plt
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from matplotlib.patches import Rectangle
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fig, ax = plt.subplots()
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# In this case, hatchcolor is orange
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patch1 = Rectangle((0.1, 0.1), 0.3, 0.3, edgecolor='red', linewidth=2,
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hatch='//', hatchcolor='orange')
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ax.add_patch(patch1)
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# When hatchcolor is not specified, it matches edgecolor
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# In this case, hatchcolor is green
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patch2 = Rectangle((0.6, 0.1), 0.3, 0.3, edgecolor='green', linewidth=2,
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hatch='//', facecolor='none')
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ax.add_patch(patch2)
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# If both hatchcolor and edgecolor are not specified
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# it will default to the 'patch.edgecolor' rcParam, which is black by default
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# In this case, hatchcolor is black
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patch3 = Rectangle((0.1, 0.6), 0.3, 0.3, hatch='//')
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ax.add_patch(patch3)
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# When using `hatch.color` in the `rcParams`
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# edgecolor will now not overwrite hatchcolor
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# In this case, hatchcolor is black
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with plt.rc_context({'hatch.color': 'black'}):
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patch4 = Rectangle((0.6, 0.6), 0.3, 0.3, edgecolor='blue', linewidth=2,
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hatch='//', facecolor='none')
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# hatchcolor is black (it uses the `hatch.color` rcParam value)
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patch4.set_edgecolor('blue')
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# hatchcolor is still black (here, it does not update when edgecolor changes)
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ax.add_patch(patch4)
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ax.annotate("hatchcolor = 'orange'",
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xy=(.5, 1.03), xycoords=patch1, ha='center', va='bottom')
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ax.annotate("hatch color unspecified\nedgecolor='green'",
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xy=(.5, 1.03), xycoords=patch2, ha='center', va='bottom')
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ax.annotate("hatch color unspecified\nusing patch.edgecolor",
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xy=(.5, 1.03), xycoords=patch3, ha='center', va='bottom')
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ax.annotate("hatch.color='black'",
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xy=(.5, 1.03), xycoords=patch4, ha='center', va='bottom')
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plt.show()

‎galleries/examples/shapes_and_collections/hatchcolor_demo.py‎

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"""
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================
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Patch hatchcolor
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================
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This example shows how to use the *hatchcolor* parameter to set the color of
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the hatch. The *hatchcolor* parameter is available for `~.patches.Patch`,
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child classes of Patch, and methods that pass through to Patch.
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"""
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import matplotlib.pyplot as plt
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import numpy as np
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from matplotlib.patches import Rectangle
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fig, (ax1, ax2) = plt.subplots(1, 2)
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# Rectangle with red hatch color and black edge color
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ax1.add_patch(Rectangle((0.1, 0.5), 0.8, 0.3, hatch=".", hatchcolor='red',
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edgecolor='black', lw=2))
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# If hatchcolor is not passed, the hatch will match the edge color
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ax1.add_patch(Rectangle((0.1, 0.1), 0.8, 0.3, hatch='x', edgecolor='orange', lw=2))
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x = np.arange(1, 5)
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y = np.arange(1, 5)
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ax2.bar(x, y, facecolor='none', edgecolor='red', hatch='//', hatchcolor='blue')
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ax2.set_xlim(0, 5)
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ax2.set_ylim(0, 5)
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plt.show()
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# %%
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#
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# .. admonition:: References
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#
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# The use of the following functions, methods, classes and modules is shown
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# in this example:
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#
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# - `matplotlib.patches`
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# - `matplotlib.patches.Polygon`
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# - `matplotlib.axes.Axes.add_patch`
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# - `matplotlib.axes.Axes.bar` / `matplotlib.pyplot.bar`

‎lib/matplotlib/backend_bases.py‎

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@@ -690,7 +690,7 @@ def __init__(self):
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self._linewidth = 1
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self._rgb = (0.0, 0.0, 0.0, 1.0)
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self._hatch = None
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self._hatch_color = colors.to_rgba(rcParams['hatch.color'])
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self._hatch_color = None
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self._hatch_linewidth = rcParams['hatch.linewidth']
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self._url = None
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self._gid = None

‎lib/matplotlib/collections.py‎

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@@ -174,7 +174,13 @@ def __init__(self, *,
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self._face_is_mapped = None
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self._edge_is_mapped = None
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self._mapped_colors = None # calculated in update_scalarmappable
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self._hatch_color = mcolors.to_rgba(mpl.rcParams['hatch.color'])
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# Temporary logic to set hatchcolor. This eager resolution is temporary
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# and will be replaced by a proper mechanism in a follow-up PR.
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hatch_color = mpl.rcParams['hatch.color']
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if hatch_color == 'edge':
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hatch_color = mpl.rcParams['patch.edgecolor']
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self._hatch_color = mcolors.to_rgba(hatch_color)
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self._hatch_linewidth = mpl.rcParams['hatch.linewidth']
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self.set_facecolor(facecolors)
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self.set_edgecolor(edgecolors)

‎lib/matplotlib/mpl-data/matplotlibrc‎

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@@ -162,7 +162,7 @@
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## ***************************************************************************
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## * HATCHES *
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## ***************************************************************************
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#hatch.color: black
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#hatch.color: edge
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#hatch.linewidth: 1.0
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‎lib/matplotlib/mpl-data/stylelib/_classic_test_patch.mplstyle‎

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text.kerning_factor : 6
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ytick.alignment: center_baseline
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hatch.color: edge

‎lib/matplotlib/patches.py‎

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@@ -56,6 +56,7 @@ def __init__(self, *,
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fill=True,
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capstyle=None,
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joinstyle=None,
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hatchcolor=None,
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**kwargs):
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"""
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The following kwarg properties are supported
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if joinstyle is None:
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joinstyle = JoinStyle.miter
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self._hatch_color = colors.to_rgba(mpl.rcParams['hatch.color'])
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self._hatch_linewidth = mpl.rcParams['hatch.linewidth']
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self._fill = bool(fill) # needed for set_facecolor call
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if color is not None:
@@ -82,6 +82,7 @@ def __init__(self, *,
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self.set_color(color)
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else:
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self.set_edgecolor(edgecolor)
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self.set_hatchcolor(hatchcolor)
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self.set_facecolor(facecolor)
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self._linewidth = 0
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self._fill = other._fill
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self._hatch = other._hatch
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self._hatch_color = other._hatch_color
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self._original_hatchcolor = other._original_hatchcolor
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self._unscaled_dash_pattern = other._unscaled_dash_pattern
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self.set_linewidth(other._linewidth) # also sets scaled dashes
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self.set_transform(other.get_data_transform())
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"""Return the face color."""
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return self._facecolor
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def get_hatchcolor(self):
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"""Return the hatch color."""
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if self._hatch_color == 'edge':
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if self._edgecolor[3] == 0: # fully transparent
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return colors.to_rgba(mpl.rcParams['patch.edgecolor'])
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return self.get_edgecolor()
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return self._hatch_color
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def get_linewidth(self):
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"""Return the line width in points."""
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return self._linewidth
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self.stale = True
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def _set_edgecolor(self, color):
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set_hatch_color = True
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if color is None:
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if (mpl.rcParams['patch.force_edgecolor'] or
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not self._fill or self._edge_default):
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color = mpl.rcParams['patch.edgecolor']
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else:
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color = 'none'
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set_hatch_color = False
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self._edgecolor = colors.to_rgba(color, self._alpha)
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if set_hatch_color:
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self._hatch_color = self._edgecolor
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self.stale = True
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def set_edgecolor(self, color):
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Patch.set_facecolor, Patch.set_edgecolor
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For setting the edge or face color individually.
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"""
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self.set_facecolor(c)
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self.set_edgecolor(c)
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self.set_hatchcolor(c)
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self.set_facecolor(c)
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def _set_hatchcolor(self, color):
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color = mpl._val_or_rc(color, 'hatch.color')
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if color == 'edge':
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self._hatch_color = 'edge'
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else:
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self._hatch_color = colors.to_rgba(color, self._alpha)
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self.stale = True
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def set_hatchcolor(self, color):
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"""
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Set the patch hatch color.
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Parameters
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----------
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color : :mpltype:`color` or 'edge' or None
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"""
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if cbook._str_equal(color, 'edge'):
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color = 'edge'
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self._original_hatchcolor = color
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self._set_hatchcolor(color)
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def set_alpha(self, alpha):
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# docstring inherited
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super().set_alpha(alpha)
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self._set_facecolor(self._original_facecolor)
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self._set_edgecolor(self._original_edgecolor)
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self._set_hatchcolor(self._original_hatchcolor)
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# stale is already True
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def set_linewidth(self, w):
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self._fill = bool(b)
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self._set_facecolor(self._original_facecolor)
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self._set_edgecolor(self._original_edgecolor)
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self._set_hatchcolor(self._original_hatchcolor)
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self.stale = True
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def get_fill(self):
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609639
if self._hatch:
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gc.set_hatch(self._hatch)
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gc.set_hatch_color(self._hatch_color)
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gc.set_hatch_color(self.get_hatchcolor())
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gc.set_hatch_linewidth(self._hatch_linewidth)
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if self.get_sketch_params() is not None:

‎lib/matplotlib/patches.pyi‎

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@@ -25,6 +25,7 @@ class Patch(artist.Artist):
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fill: bool = ...,
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capstyle: CapStyleType | None = ...,
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joinstyle: JoinStyleType | None = ...,
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hatchcolor: ColorType | None = ...,
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**kwargs,
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) -> None: ...
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def get_verts(self) -> ArrayLike: ...
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def get_antialiased(self) -> bool: ...
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def get_edgecolor(self) -> ColorType: ...
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def get_facecolor(self) -> ColorType: ...
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def get_hatchcolor(self) -> ColorType: ...
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def get_linewidth(self) -> float: ...
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def get_linestyle(self) -> LineStyleType: ...
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def set_antialiased(self, aa: bool | None) -> None: ...
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def set_edgecolor(self, color: ColorType | None) -> None: ...
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def set_facecolor(self, color: ColorType | None) -> None: ...
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def set_color(self, c: ColorType | None) -> None: ...
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def set_hatchcolor(self, color: ColorType | Literal["edge"] | None) -> None: ...
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def set_alpha(self, alpha: float | None) -> None: ...
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def set_linewidth(self, w: float | None) -> None: ...
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def set_linestyle(self, ls: LineStyleType | None) -> None: ...

‎lib/matplotlib/rcsetup.py‎

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@@ -301,6 +301,12 @@ def validate_color_or_auto(s):
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return validate_color(s)
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def _validate_color_or_edge(s):
305+
if cbook._str_equal(s, 'edge'):
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return s
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return validate_color(s)
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304310
def validate_color_for_prop_cycle(s):
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# N-th color cycle syntax can't go into the color cycle.
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if isinstance(s, str) and re.match("^C[0-9]$", s):
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950956
"patch.antialiased": validate_bool, # antialiased (no jaggies)
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952958
## hatch props
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"hatch.color": validate_color,
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"hatch.color": _validate_color_or_edge,
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"hatch.linewidth": validate_float,
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## Histogram properties

‎lib/matplotlib/rcsetup.pyi‎

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@@ -48,6 +48,7 @@ _auto_backend_sentinel: object
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def validate_backend(s: Any) -> str: ...
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def validate_color_or_inherit(s: Any) -> Literal["inherit"] | ColorType: ...
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def validate_color_or_auto(s: Any) -> ColorType | Literal["auto"]: ...
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def _validate_color_or_edge(s: Any) -> ColorType | Literal["edge"]: ...
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def validate_color_for_prop_cycle(s: Any) -> ColorType: ...
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def validate_color(s: Any) -> ColorType: ...
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def validate_colorlist(s: Any) -> list[ColorType]: ...

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