diff --git a/lib/matplotlib/collections.py b/lib/matplotlib/collections.py
index d0df32638be8..c182290e8fda 100644
--- a/lib/matplotlib/collections.py
+++ b/lib/matplotlib/collections.py
@@ -1808,9 +1808,10 @@ def __init__(self, patches, match_original=False, **kwargs):
*match_original*
If True, use the colors and linewidths of the original
- patches. If False, new colors may be assigned by
- providing the standard collection arguments, facecolor,
- edgecolor, linewidths, norm or cmap.
+ patches. Also use the hatch of the first patch provided.
+ If False, new colors may be assigned by providing the
+ standard collection arguments, facecolor, edgecolor,
+ linewidths, norm or cmap.
If any of *edgecolors*, *facecolors*, *linewidths*, *antialiaseds* are
None, they default to their `.rcParams` patch setting, in sequence
@@ -1827,12 +1828,22 @@ def determine_facecolor(patch):
if patch.get_fill():
return patch.get_facecolor()
return [0, 0, 0, 0]
-
kwargs['facecolors'] = [determine_facecolor(p) for p in patches]
- kwargs['edgecolors'] = [p.get_edgecolor() for p in patches]
+ # If no edgecolor was set within the collection of patches
+ # then we will not supply the edgecolor argument, which allows the
+ # default hatch color to be used.
+ if any(p._original_edgecolor is not None for p in patches):
+ kwargs['edgecolors'] = [p.get_edgecolor() for p in patches]
kwargs['linewidths'] = [p.get_linewidth() for p in patches]
kwargs['linestyles'] = [p.get_linestyle() for p in patches]
kwargs['antialiaseds'] = [p.get_antialiased() for p in patches]
+ if patches:
+ hatch = patches[0].get_hatch()
+ kwargs['hatch'] = hatch
+ if any(p.get_hatch() != hatch for p in patches):
+ warnings.warn("More than one type of hatch detected in "
+ "PatchCollection. Only using hatch of "
+ "first patch.")
super().__init__(**kwargs)
diff --git a/lib/matplotlib/tests/test_collections.py b/lib/matplotlib/tests/test_collections.py
index acca60fd01c1..9e4888edbce0 100644
--- a/lib/matplotlib/tests/test_collections.py
+++ b/lib/matplotlib/tests/test_collections.py
@@ -10,6 +10,7 @@
from matplotlib.backend_bases import MouseEvent
import matplotlib.collections as mcollections
import matplotlib.colors as mcolors
+import matplotlib.patches as mpatches
import matplotlib.transforms as mtransforms
from matplotlib.collections import (Collection, LineCollection,
EventCollection, PolyCollection)
@@ -1117,3 +1118,25 @@ def test_set_offset_units():
off0 = sc.get_offsets()
sc.set_offsets(list(zip(y, d)))
np.testing.assert_allclose(off0, sc.get_offsets())
+
+
+@check_figures_equal(extensions=['png'])
+def test_patch_collection_keeps_hatch(fig_test, fig_ref):
+ # When creating a PatchCollection, the hatch of the original patches should
+ # be used if match_original == True.
+ ax = fig_test.subplots()
+ patches = [
+ mpatches.Rectangle((0, 0), 0.2, .2, hatch="/"),
+ mpatches.Rectangle((0.4, 0.4), 0.2, .2, hatch="/")
+ ]
+ collection = mcollections.PatchCollection(patches, match_original=True)
+ ax.add_collection(collection)
+
+ ax = fig_ref.subplots()
+ patches = [
+ mpatches.Rectangle((0, 0), 0.2, .2),
+ mpatches.Rectangle((0.4, 0.4), 0.2, .2)
+ ]
+ collection = mcollections.PatchCollection(patches, match_original=False,
+ hatch="/")
+ ax.add_collection(collection)
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