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POC: make scaling optional in Collection.get_linestyle by rcomer · Pull Request #29304 · matplotlib/matplotlib · GitHub

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POC: make scaling optional in Collection.get_linestyle #29304

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POC: make scaling optional in Collection.get_linestyle #29304

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7 changes: 3 additions & 4 deletions galleries/examples/text_labels_and_annotations/legend_demo.py
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Original file line number Diff line number Diff line change
Expand Up @@ -145,15 +145,14 @@ def create_artists(self, legend, orig_handle,
except IndexError:
color = orig_handle.get_colors()[0]
try:
dashes = orig_handle.get_dashes()[i]
linestyle = orig_handle.get_linestyle(scaled=False)[i]
except IndexError:
dashes = orig_handle.get_dashes()[0]
linestyle = orig_handle.get_linestyle(scaled=False)[0]
try:
lw = orig_handle.get_linewidths()[i]
except IndexError:
lw = orig_handle.get_linewidths()[0]
if dashes[1] is not None:
legline.set_dashes(dashes[1])
legline.set_linestyle(linestyle)
legline.set_color(color)
legline.set_transform(trans)
legline.set_linewidth(lw)
Expand Down
12 changes: 10 additions & 2 deletions lib/matplotlib/collections.py
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Original file line number Diff line number Diff line change
Expand Up @@ -626,6 +626,11 @@ def set_linestyle(self, ls):
':', '', (offset, on-off-seq)}. See `.Line2D.set_linestyle` for a
complete description.
"""
if isinstance(ls, (str, tuple)):
self._original_linestyle = [ls]

rcomer Dec 13, 2024 •
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

I got a lot more failures if I did not make sure this is a list. I note that Collection.get_facecolor always returns a sequence of colours, having applied to_rgba_array.
else:
self._original_linestyle = ls

try:
dashes = [mlines._get_dash_pattern(ls)]
except ValueError:
Expand Down Expand Up @@ -866,8 +871,11 @@ def set_alpha(self, alpha):
def get_linewidth(self):
return self._linewidths

def get_linestyle(self):
return self._linestyles
def get_linestyle(self, scaled=False):
if scaled:
return self._linestyles

return self._original_linestyle

def _set_mappable_flags(self):
"""
Expand Down
2 changes: 1 addition & 1 deletion lib/matplotlib/collections.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -68,7 +68,7 @@ class Collection(colorizer.ColorizingArtist):
def set_edgecolor(self, c: ColorType | Sequence[ColorType]) -> None: ...
def set_alpha(self, alpha: float | Sequence[float] | None) -> None: ...
def get_linewidth(self) -> float | Sequence[float]: ...
def get_linestyle(self) -> LineStyleType | Sequence[LineStyleType]: ...
def get_linestyle(self, scaled: bool = ...) -> LineStyleType | Sequence[LineStyleType]: ...
def update_scalarmappable(self) -> None: ...
def get_fill(self) -> bool: ...
def update_from(self, other: Artist) -> None: ...
Expand Down
5 changes: 3 additions & 2 deletions lib/matplotlib/legend_handler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -407,7 +407,7 @@ def get_numpoints(self, legend):

def _default_update_prop(self, legend_handle, orig_handle):
lw = orig_handle.get_linewidths()[0]
dashes = orig_handle._us_linestyles[0]
dashes = orig_handle.get_linestyles(scaled=False)[0]
color = orig_handle.get_colors()[0]
legend_handle.set_color(color)
legend_handle.set_linestyle(dashes)
Expand Down Expand Up @@ -798,7 +798,8 @@ def get_first(prop_array):
legend_handle._hatch_color = orig_handle._hatch_color
# Setters are fine for the remaining attributes.
legend_handle.set_linewidth(get_first(orig_handle.get_linewidths()))
legend_handle.set_linestyle(get_first(orig_handle.get_linestyles()))
legend_handle.set_linestyle(
get_first(orig_handle.get_linestyles(scaled=False)))
legend_handle.set_transform(get_first(orig_handle.get_transforms()))
legend_handle.set_figure(orig_handle.get_figure())
# Alpha is already taken into account by the color attributes.
Expand Down
8 changes: 4 additions & 4 deletions lib/matplotlib/tests/test_collections.py
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Original file line number Diff line number Diff line change
Expand Up @@ -86,7 +86,7 @@ def test__EventCollection__get_props():
# check that the default lineoffset matches the input lineoffset
assert props['lineoffset'] == coll.get_lineoffset()
# check that the default linestyle matches the input linestyle
assert coll.get_linestyle() == [(0, None)]
assert coll.get_linestyle(scaled=True) == [(0, None)]
# check that the default color matches the input color
for color in [coll.get_color(), *coll.get_colors()]:
np.testing.assert_array_equal(color, props['color'])
Expand Down Expand Up @@ -248,7 +248,7 @@ def test__EventCollection__set_lineoffset():
])
def test__EventCollection__set_prop():
for prop, value, expected in [
('linestyle', 'dashed', [(0, (6.0, 6.0))]),
('linestyle', 'dashed', ['dashed']),
('linestyle', (0, (6., 6.)), [(0, (6.0, 6.0))]),
('linewidth', 5, 5),
]:
Expand Down Expand Up @@ -666,11 +666,11 @@ def test_lslw_bcast():
col.set_linestyles(['-', '-'])
col.set_linewidths([1, 2, 3])

assert col.get_linestyles() == [(0, None)] * 6
assert col.get_linestyles(scaled=True) == [(0, None)] * 6
assert col.get_linewidths() == [1, 2, 3] * 2

col.set_linestyles(['-', '-', '-'])
assert col.get_linestyles() == [(0, None)] * 3
assert col.get_linestyles(scaled=True) == [(0, None)] * 3
assert (col.get_linewidths() == [1, 2, 3]).all()


Expand Down
12 changes: 11 additions & 1 deletion lib/matplotlib/tests/test_legend.py
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Original file line number Diff line number Diff line change
Expand Up @@ -528,6 +528,16 @@ def test_legend_stackplot():
ax.legend(loc='best')


@mpl.style.context('default')
def test_polycollection_linestyles_unscaled():
fig, ax = plt.subplots()
q = ax.quiver(0, 0, 7, 1, label='v1 + v2', linewidth=3, linestyle='dotted')
leg = ax.legend()
handle, = leg.legend_handles

assert q.get_linestyle(scaled=False)[0] == handle.get_linestyle()


def test_cross_figure_patch_legend():
fig, ax = plt.subplots()
fig2, ax2 = plt.subplots()
Expand Down Expand Up @@ -612,7 +622,7 @@ def test_linecollection_scaled_dashes():
h1, h2, h3 = leg.legend_handles

for oh, lh in zip((lc1, lc2, lc3), (h1, h2, h3)):
assert oh.get_linestyles()[0] == lh._dash_pattern
assert oh.get_linestyles()[0] == lh.get_linestyle()


def test_handler_numpoints():
Expand Down
2 changes: 1 addition & 1 deletion lib/mpl_toolkits/mplot3d/tests/test_legend3d.py
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Original file line number Diff line number Diff line change
Expand Up @@ -55,7 +55,7 @@ def test_linecollection_scaled_dashes():
h1, h2, h3 = leg.legend_handles

for oh, lh in zip((lc1, lc2, lc3), (h1, h2, h3)):
assert oh.get_linestyles()[0] == lh._dash_pattern
assert oh.get_linestyles()[0] == lh.get_linestyle()


def test_handlerline3d():
Expand Down
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