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test_offsetbox.py
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126 lines (111 loc) · 4.09 KB
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import pytest
from matplotlib.testing.decorators import image_comparison
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
import matplotlib.lines as mlines
from matplotlib.offsetbox import (
AnchoredOffsetbox, DrawingArea, _get_packed_offsets)
@image_comparison(baseline_images=['offsetbox_clipping'], remove_text=True)
def test_offsetbox_clipping():
# - create a plot
# - put an AnchoredOffsetbox with a child DrawingArea
# at the center of the axes
# - give the DrawingArea a gray background
# - put a black line across the bounds of the DrawingArea
# - see that the black line is clipped to the edges of
# the DrawingArea.
fig, ax = plt.subplots()
size = 100
da = DrawingArea(size, size, clip=True)
bg = mpatches.Rectangle((0, 0), size, size,
facecolor='#CCCCCC',
edgecolor='None',
linewidth=0)
line = mlines.Line2D([-size*.5, size*1.5], [size/2, size/2],
color='black',
linewidth=10)
anchored_box = AnchoredOffsetbox(
loc=10,
child=da,
pad=0.,
frameon=False,
bbox_to_anchor=(.5, .5),
bbox_transform=ax.transAxes,
borderpad=0.)
da.add_artist(bg)
da.add_artist(line)
ax.add_artist(anchored_box)
ax.set_xlim((0, 1))
ax.set_ylim((0, 1))
def test_offsetbox_clip_children():
# - create a plot
# - put an AnchoredOffsetbox with a child DrawingArea
# at the center of the axes
# - give the DrawingArea a gray background
# - put a black line across the bounds of the DrawingArea
# - see that the black line is clipped to the edges of
# the DrawingArea.
fig, ax = plt.subplots()
size = 100
da = DrawingArea(size, size, clip=True)
bg = mpatches.Rectangle((0, 0), size, size,
facecolor='#CCCCCC',
edgecolor='None',
linewidth=0)
line = mlines.Line2D([-size*.5, size*1.5], [size/2, size/2],
color='black',
linewidth=10)
anchored_box = AnchoredOffsetbox(
loc=10,
child=da,
pad=0.,
frameon=False,
bbox_to_anchor=(.5, .5),
bbox_transform=ax.transAxes,
borderpad=0.)
da.add_artist(bg)
da.add_artist(line)
ax.add_artist(anchored_box)
fig.canvas.draw()
assert not fig.stale
da.clip_children = True
assert fig.stale
def test_offsetbox_loc_codes():
# Check that valid string location codes all work with an AnchoredOffsetbox
codes = {'upper right': 1,
'upper left': 2,
'lower left': 3,
'lower right': 4,
'right': 5,
'center left': 6,
'center right': 7,
'lower center': 8,
'upper center': 9,
'center': 10,
}
fig, ax = plt.subplots()
da = DrawingArea(100, 100)
for code in codes:
anchored_box = AnchoredOffsetbox(loc=code, child=da)
ax.add_artist(anchored_box)
fig.canvas.draw()
def test_expand_with_tight_layout():
# Check issue reported in #10476, and updated due to #10784
fig, ax = plt.subplots()
d1 = [1, 2]
d2 = [2, 1]
ax.plot(d1, label='series 1')
ax.plot(d2, label='series 2')
ax.legend(ncol=2, mode='expand')
fig.tight_layout() # where the crash used to happen
@pytest.mark.parametrize('wd_list',
([(150, 1)], [(150, 1)]*3, [(0.1, 1)], [(0.1, 1)]*2))
@pytest.mark.parametrize('total', (250, 100, 0, -1, None))
@pytest.mark.parametrize('sep', (250, 1, 0, -1))
@pytest.mark.parametrize('mode', ("expand", "fixed", "equal"))
def test_get_packed_offsets(wd_list, total, sep, mode):
# Check a (rather arbitrary) set of parameters due to successive similar
# issue tickets (at least #10476 and #10784) related to corner cases
# triggered inside this function when calling higher-level functions
# (e.g. `Axes.legend`).
_get_packed_offsets(wd_list, total, sep, mode=mode)