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import platform
import numpy as np
from matplotlib.testing.decorators import image_comparison
import matplotlib.pyplot as plt
import matplotlib.patheffects as path_effects
from matplotlib.path import Path
import matplotlib.patches as patches
from matplotlib.backend_bases import RendererBase
from matplotlib.patheffects import PathEffectRenderer
@image_comparison(['patheffect1'], remove_text=True)
def test_patheffect1():
ax1 = plt.subplot()
ax1.imshow([[1, 2], [2, 3]])
txt = ax1.annotate("test", (1., 1.), (0., 0),
arrowprops=dict(arrowstyle="->",
connectionstyle="angle3", lw=2),
size=20, ha="center",
path_effects=[path_effects.withStroke(linewidth=3,
foreground="w")])
txt.arrow_patch.set_path_effects([path_effects.Stroke(linewidth=5,
foreground="w"),
path_effects.Normal()])
pe = [path_effects.withStroke(linewidth=3, foreground="w")]
ax1.grid(True, linestyle="-", path_effects=pe)
@image_comparison(['patheffect2'], remove_text=True, style='mpl20',
tol=0 if platform.machine() == 'x86_64' else 0.06)
def test_patheffect2():
ax2 = plt.subplot()
arr = np.arange(25).reshape((5, 5))
ax2.imshow(arr, interpolation='nearest')
cntr = ax2.contour(arr, colors="k")
cntr.set(path_effects=[path_effects.withStroke(linewidth=3, foreground="w")])
clbls = ax2.clabel(cntr, fmt="%2.0f", use_clabeltext=True)
plt.setp(clbls,
path_effects=[path_effects.withStroke(linewidth=3,
foreground="w")])
@image_comparison(['patheffect3'],
tol=0 if platform.machine() == 'x86_64' else 0.019)
def test_patheffect3():
p1, = plt.plot([1, 3, 5, 4, 3], 'o-b', lw=4)
p1.set_path_effects([path_effects.SimpleLineShadow(),
path_effects.Normal()])
plt.title(
r'testing$^{123}$',
path_effects=[path_effects.withStroke(linewidth=1, foreground="r")])
leg = plt.legend([p1], [r'Line 1$^2$'], fancybox=True, loc='upper left')
leg.legendPatch.set_path_effects([path_effects.withSimplePatchShadow()])
text = plt.text(2, 3, 'Drop test', color='white',
bbox={'boxstyle': 'circle,pad=0.1', 'color': 'red'})
pe = [path_effects.Stroke(linewidth=3.75, foreground='k'),
path_effects.withSimplePatchShadow((6, -3), shadow_rgbFace='blue')]
text.set_path_effects(pe)
text.get_bbox_patch().set_path_effects(pe)
pe = [path_effects.PathPatchEffect(offset=(4, -4), hatch='xxxx',
facecolor='gray'),
path_effects.PathPatchEffect(edgecolor='white', facecolor='black',
lw=1.1)]
t = plt.gcf().text(0.02, 0.1, 'Hatch shadow', fontsize=75, weight=1000,
va='center')
t.set_path_effects(pe)
@image_comparison(['stroked_text.png'])
def test_patheffects_stroked_text():
text_chunks = [
'A B C D E F G H I J K L',
'M N O P Q R S T U V W',
'X Y Z a b c d e f g h i j',
'k l m n o p q r s t u v',
'w x y z 0123456789',
r"!@#$%^&*()-=_+[]\;'",
',./{}|:"<>?'
]
font_size = 50
ax = plt.axes((0, 0, 1, 1))
for i, chunk in enumerate(text_chunks):
text = ax.text(x=0.01, y=(0.9 - i * 0.13), s=chunk,
fontdict={'ha': 'left', 'va': 'center',
'size': font_size, 'color': 'white'})
text.set_path_effects([path_effects.Stroke(linewidth=font_size / 10,
foreground='black'),
path_effects.Normal()])
ax.set_xlim(0, 1)
ax.set_ylim(0, 1)
ax.axis('off')
def test_PathEffect_points_to_pixels():
fig = plt.figure(dpi=150)
p1, = plt.plot(range(10))
p1.set_path_effects([path_effects.SimpleLineShadow(),
path_effects.Normal()])
renderer = fig.canvas.get_renderer()
pe_renderer = path_effects.PathEffectRenderer(
p1.get_path_effects(), renderer)
# Confirm that using a path effects renderer maintains point sizes
# appropriately. Otherwise rendered font would be the wrong size.
assert renderer.points_to_pixels(15) == pe_renderer.points_to_pixels(15)
def test_SimplePatchShadow_offset():
pe = path_effects.SimplePatchShadow(offset=(4, 5))
assert pe._offset == (4, 5)
@image_comparison(['collection'], tol=0.083, style='mpl20')
def test_collection():
x, y = np.meshgrid(np.linspace(0, 10, 150), np.linspace(-5, 5, 100))
data = np.sin(x) + np.cos(y)
cs = plt.contour(data)
cs.set(path_effects=[
path_effects.PathPatchEffect(edgecolor='black', facecolor='none', linewidth=12),
path_effects.Stroke(linewidth=5)])
for text in plt.clabel(cs, colors='white'):
text.set_path_effects([path_effects.withStroke(foreground='k',
linewidth=3)])
text.set_bbox({'boxstyle': 'sawtooth', 'facecolor': 'none',
'edgecolor': 'blue'})
@image_comparison(['tickedstroke'], remove_text=True, extensions=['png'],
tol=0.22) # Increased tolerance due to fixed clipping.
def test_tickedstroke():
fig, (ax1, ax2, ax3) = plt.subplots(1, 3, figsize=(12, 4))
path = Path.unit_circle()
patch = patches.PathPatch(path, facecolor='none', lw=2, path_effects=[
path_effects.withTickedStroke(angle=-90, spacing=10,
length=1)])
ax1.add_patch(patch)
ax1.axis('equal')
ax1.set_xlim(-2, 2)
ax1.set_ylim(-2, 2)
ax2.plot([0, 1], [0, 1], label=' ',
path_effects=[path_effects.withTickedStroke(spacing=7,
angle=135)])
nx = 101
x = np.linspace(0.0, 1.0, nx)
y = 0.3 * np.sin(x * 8) + 0.4
ax2.plot(x, y, label=' ', path_effects=[path_effects.withTickedStroke()])
ax2.legend()
nx = 101
ny = 105
# Set up survey vectors
xvec = np.linspace(0.001, 4.0, nx)
yvec = np.linspace(0.001, 4.0, ny)
# Set up survey matrices. Design disk loading and gear ratio.
x1, x2 = np.meshgrid(xvec, yvec)
# Evaluate some stuff to plot
g1 = -(3 * x1 + x2 - 5.5)
g2 = -(x1 + 2 * x2 - 4)
g3 = .8 + x1 ** -3 - x2
cg1 = ax3.contour(x1, x2, g1, [0], colors=('k',))
cg1.set(path_effects=[path_effects.withTickedStroke(angle=135)])
cg2 = ax3.contour(x1, x2, g2, [0], colors=('r',))
cg2.set(path_effects=[path_effects.withTickedStroke(angle=60, length=2)])
cg3 = ax3.contour(x1, x2, g3, [0], colors=('b',))
cg3.set(path_effects=[path_effects.withTickedStroke(spacing=7)])
ax3.set_xlim(0, 4)
ax3.set_ylim(0, 4)
@image_comparison(['spaces_and_newlines.png'], remove_text=True)
def test_patheffects_spaces_and_newlines():
ax = plt.subplot()
s1 = " "
s2 = "\nNewline also causes problems"
text1 = ax.text(0.5, 0.75, s1, ha='center', va='center', size=20,
bbox={'color': 'salmon'})
text2 = ax.text(0.5, 0.25, s2, ha='center', va='center', size=20,
bbox={'color': 'thistle'})
text1.set_path_effects([path_effects.Normal()])
text2.set_path_effects([path_effects.Normal()])
def test_patheffects_overridden_methods_open_close_group():
class CustomRenderer(RendererBase):
def __init__(self):
super().__init__()
def open_group(self, s, gid=None):
return "open_group overridden"
def close_group(self, s):
return "close_group overridden"
renderer = PathEffectRenderer([path_effects.Normal()], CustomRenderer())
assert renderer.open_group('s') == "open_group overridden"
assert renderer.close_group('s') == "close_group overridden"
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