from collections import namedtuple

import io

import numpy as np

from numpy.testing import assert_allclose

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.backend_bases import MouseButton

from matplotlib.offsetbox import (

AnchoredOffsetbox, AnnotationBbox, AnchoredText, DrawingArea,

OffsetImage, TextArea, _get_packed_offsets)

@image_comparison(['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='center',

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='center',

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`).

# These are just some additional smoke tests. The output is untested.

_get_packed_offsets(wd_list, total, sep, mode=mode)

_Params = namedtuple('_params', 'wd_list, total, sep, expected')

@pytest.mark.parametrize('wd_list, total, sep, expected', [

_Params( # total=None

[(3, 0), (1, 0), (2, 0)], total=None, sep=1, expected=(8, [0, 4, 6])),

_Params( # total larger than required

[(3, 0), (1, 0), (2, 0)], total=10, sep=1, expected=(10, [0, 4, 6])),

_Params( # total smaller than required

[(3, 0), (1, 0), (2, 0)], total=5, sep=1, expected=(5, [0, 4, 6])),

])

def test_get_packed_offsets_fixed(wd_list, total, sep, expected):

result = _get_packed_offsets(wd_list, total, sep, mode='fixed')

assert result[0] == expected[0]

assert_allclose(result[1], expected[1])

@pytest.mark.parametrize('wd_list, total, sep, expected', [

_Params( # total=None (implicit 1)

[(.1, 0)] * 3, total=None, sep=None, expected=(1, [0, .45, .9])),

_Params( # total larger than sum of widths

[(3, 0), (1, 0), (2, 0)], total=10, sep=1, expected=(10, [0, 5, 8])),

_Params( # total smaller sum of widths: overlapping boxes

[(3, 0), (1, 0), (2, 0)], total=5, sep=1, expected=(5, [0, 2.5, 3])),

])

def test_get_packed_offsets_expand(wd_list, total, sep, expected):

result = _get_packed_offsets(wd_list, total, sep, mode='expand')

assert result[0] == expected[0]

assert_allclose(result[1], expected[1])

@pytest.mark.parametrize('wd_list, total, sep, expected', [

_Params( # total larger than required

[(3, 0), (2, 0), (1, 0)], total=6, sep=None, expected=(6, [0, 2, 4])),

_Params( # total smaller sum of widths: overlapping boxes

[(3, 0), (2, 0), (1, 0), (.5, 0)], total=2, sep=None,

expected=(2, [0, 0.5, 1, 1.5])),

_Params( # total larger than required

[(.5, 0), (1, 0), (.2, 0)], total=None, sep=1,

expected=(6, [0, 2, 4])),

# the case total=None, sep=None is tested separately below

])

def test_get_packed_offsets_equal(wd_list, total, sep, expected):

result = _get_packed_offsets(wd_list, total, sep, mode='equal')

assert result[0] == expected[0]

assert_allclose(result[1], expected[1])

def test_get_packed_offsets_equal_total_none_sep_none():

with pytest.raises(ValueError):

_get_packed_offsets([(1, 0)] * 3, total=None, sep=None, mode='equal')

@pytest.mark.parametrize('child_type', ['draw', 'image', 'text'])

@pytest.mark.parametrize('boxcoords',

['axes fraction', 'axes pixels', 'axes points',

'data'])

def test_picking(child_type, boxcoords):

# These all take up approximately the same area.

if child_type == 'draw':

picking_child = DrawingArea(5, 5)

picking_child.add_artist(mpatches.Rectangle((0, 0), 5, 5, linewidth=0))

elif child_type == 'image':

im = np.ones((5, 5))

im[2, 2] = 0

picking_child = OffsetImage(im)

elif child_type == 'text':

picking_child = TextArea('\N{Black Square}', textprops={'fontsize': 5})

else:

assert False, f'Unknown picking child type {child_type}'

fig, ax = plt.subplots()

ab = AnnotationBbox(picking_child, (0.5, 0.5), boxcoords=boxcoords)

ab.set_picker(True)

ax.add_artist(ab)

calls = []

fig.canvas.mpl_connect('pick_event', lambda event: calls.append(event))

# Annotation should be picked by an event occurring at its center.

if boxcoords == 'axes points':

x, y = ax.transAxes.transform_point((0, 0))

x += 0.5 * fig.dpi / 72

y += 0.5 * fig.dpi / 72

elif boxcoords == 'axes pixels':

x, y = ax.transAxes.transform_point((0, 0))

x += 0.5

y += 0.5

else:

x, y = ax.transAxes.transform_point((0.5, 0.5))

fig.canvas.draw()

calls.clear()

fig.canvas.button_press_event(x, y, MouseButton.LEFT)

assert len(calls) == 1 and calls[0].artist == ab

# Annotation should *not* be picked by an event at its original center

# point when the limits have changed enough to hide the *xy* point.

ax.set_xlim(-1, 0)

ax.set_ylim(-1, 0)

fig.canvas.draw()

calls.clear()

fig.canvas.button_press_event(x, y, MouseButton.LEFT)

assert len(calls) == 0

@image_comparison(['anchoredtext_align.png'], remove_text=True, style='mpl20')

def test_anchoredtext_horizontal_alignment():

fig, ax = plt.subplots()

text0 = AnchoredText("test\ntest long text", loc="center left",

pad=0.2, prop={"ha": "left"})

ax.add_artist(text0)

text1 = AnchoredText("test\ntest long text", loc="center",

pad=0.2, prop={"ha": "center"})

ax.add_artist(text1)

text2 = AnchoredText("test\ntest long text", loc="center right",

pad=0.2, prop={"ha": "right"})

ax.add_artist(text2)

def test_annotationbbox_extents():

plt.rcParams.update(plt.rcParamsDefault)

fig, ax = plt.subplots(figsize=(4, 3), dpi=100)

ax.axis([0, 1, 0, 1])

an1 = ax.annotate("Annotation", xy=(.9, .9), xytext=(1.1, 1.1),

arrowprops=dict(arrowstyle="->"), clip_on=False,

va="baseline", ha="left")

da = DrawingArea(20, 20, 0, 0, clip=True)

p = mpatches.Circle((-10, 30), 32)

da.add_artist(p)

ab3 = AnnotationBbox(da, [.5, .5], xybox=(-0.2, 0.5), xycoords='data',

boxcoords="axes fraction", box_alignment=(0., .5),

arrowprops=dict(arrowstyle="->"))

ax.add_artist(ab3)

im = OffsetImage(np.random.rand(10, 10), zoom=3)

im.image.axes = ax

ab6 = AnnotationBbox(im, (0.5, -.3), xybox=(0, 75),

xycoords='axes fraction',

boxcoords="offset points", pad=0.3,

arrowprops=dict(arrowstyle="->"))

ax.add_artist(ab6)

fig.canvas.draw()

renderer = fig.canvas.get_renderer()

# Test Annotation

bb1w = an1.get_window_extent(renderer)

bb1e = an1.get_tightbbox(renderer)

target1 = [332.9, 242.8, 467.0, 298.9]

assert_allclose(bb1w.extents, target1, atol=2)

assert_allclose(bb1e.extents, target1, atol=2)

# Test AnnotationBbox

bb3w = ab3.get_window_extent(renderer)

bb3e = ab3.get_tightbbox(renderer)

target3 = [-17.6, 129.0, 200.7, 167.9]

assert_allclose(bb3w.extents, target3, atol=2)

assert_allclose(bb3e.extents, target3, atol=2)

bb6w = ab6.get_window_extent(renderer)

bb6e = ab6.get_tightbbox(renderer)

target6 = [180.0, -32.0, 230.0, 92.9]

assert_allclose(bb6w.extents, target6, atol=2)

assert_allclose(bb6e.extents, target6, atol=2)

# Test bbox_inches='tight'

buf = io.BytesIO()

fig.savefig(buf, bbox_inches='tight')

buf.seek(0)

shape = plt.imread(buf).shape

targetshape = (350, 504, 4)

assert_allclose(shape, targetshape, atol=2)

# Simple smoke test for tight_layout, to make sure it does not error out.

fig.canvas.draw()

fig.tight_layout()

fig.canvas.draw()