1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
import platform
from unittest.mock import patch
import numpy as np
import pytest
from qtpy import API_NAME
try:
from cmap import Colormap
except ImportError:
pytest.skip("cmap not installed", allow_module_level=True)
from qtpy.QtCore import QRect
from qtpy.QtGui import QPainter, QPixmap
from qtpy.QtWidgets import QStyleOptionViewItem, QWidget
from superqt import QColormapComboBox
from superqt.cmap import (
CmapCatalogComboBox,
QColormapItemDelegate,
QColormapLineEdit,
_cmap_combo,
draw_colormap,
)
from superqt.utils import qimage_to_array
def test_draw_cmap(qtbot):
# draw into a QWidget
wdg = QWidget()
qtbot.addWidget(wdg)
draw_colormap(wdg, "viridis")
# draw into any QPaintDevice
draw_colormap(QPixmap(), "viridis")
# pass a painter an explicit colormap and a rect
draw_colormap(QPainter(), Colormap(("red", "yellow", "blue")), QRect())
# test with a border
draw_colormap(wdg, "viridis", border_color="red", border_width=2)
with pytest.raises(TypeError, match="Expected a QPainter or QPaintDevice instance"):
draw_colormap(QRect(), "viridis") # type: ignore
with pytest.raises(TypeError, match="Expected a Colormap instance or something"):
draw_colormap(QPainter(), "not a recognized string or cmap", QRect())
def test_cmap_draw_result():
"""Test that the image drawn actually looks correct."""
# draw into any QPaintDevice
w = 100
h = 20
pix = QPixmap(w, h)
cmap = Colormap("viridis")
draw_colormap(pix, cmap)
ary1 = cmap(np.tile(np.linspace(0, 1, w), (h, 1)), bytes=True)
ary2 = qimage_to_array(pix.toImage())
# there are some subtle differences between how qimage draws and how
# cmap draws, so we can't assert that the arrays are exactly equal.
# they are visually indistinguishable, and numbers are close within 4 (/255) values
# and linux, for some reason, is a bit more different``
atol = 8 if platform.system() == "Linux" else 4
np.testing.assert_allclose(ary1, ary2, atol=atol)
cmap2 = Colormap(("#230777",), name="MyMap")
draw_colormap(pix, cmap2) # include transparency
def test_catalog_combo(qtbot):
wdg = CmapCatalogComboBox()
qtbot.addWidget(wdg)
wdg.show()
wdg.setCurrentText("viridis")
assert wdg.currentColormap() == Colormap("viridis")
@pytest.mark.parametrize("filterable", [False, True])
def test_cmap_combo(qtbot, filterable):
wdg = QColormapComboBox(allow_user_colormaps=True, filterable=filterable)
qtbot.addWidget(wdg)
wdg.show()
assert wdg.userAdditionsAllowed()
with qtbot.waitSignal(wdg.currentColormapChanged):
wdg.addColormaps([Colormap("viridis"), "magma", ("red", "blue", "green")])
assert wdg.currentColormap().name.split(":")[-1] == "viridis"
with pytest.raises(ValueError, match="Invalid colormap"):
wdg.addColormap("not a recognized string or cmap")
assert wdg.currentColormap().name.split(":")[-1] == "viridis"
assert wdg.currentIndex() == 0
assert wdg.count() == 4 # includes "Add Colormap..."
wdg.setCurrentColormap("magma")
assert wdg.count() == 4 # make sure we didn't duplicate
assert wdg.currentIndex() == 1
if API_NAME == "PySide2":
return # the rest fails on CI... but works locally
# click the Add Colormap... item
# NOTE: We wrap __init__ instead of patching exec directly because
# PySide6 6.10 crashes when MetaObjectBuilder inspects mocked methods
# during signal connection (parsePythonType segfault)
_original_init = _cmap_combo._CmapNameDialog.__init__
def _init_with_mock_exec(self, *args, **kwargs):
_original_init(self, *args, **kwargs)
self.exec = lambda: True
with qtbot.waitSignal(wdg.currentColormapChanged):
with patch.object(
_cmap_combo._CmapNameDialog, "__init__", _init_with_mock_exec
):
wdg._on_activated(wdg.count() - 1)
assert wdg.count() == 5
# this could potentially fail in the future if cmap catalog changes
# but mocking the return value of the dialog is also annoying
assert wdg.itemColormap(3).name.split(":")[-1] == "accent"
# click the Add Colormap... item, but cancel the dialog
def _init_with_mock_exec_false(self, *args, **kwargs):
_original_init(self, *args, **kwargs)
self.exec = lambda: False
with patch.object(
_cmap_combo._CmapNameDialog, "__init__", _init_with_mock_exec_false
):
wdg._on_activated(wdg.count() - 1)
def test_cmap_item_delegate(qtbot):
wdg = CmapCatalogComboBox()
qtbot.addWidget(wdg)
view = wdg.view()
delegate = view.itemDelegate()
assert isinstance(delegate, QColormapItemDelegate)
# smoke tests:
painter = QPainter()
option = QStyleOptionViewItem()
index = wdg.model().index(0, 0)
delegate._colormap_fraction = 1
delegate.paint(painter, option, index)
delegate._colormap_fraction = 0.33
delegate.paint(painter, option, index)
assert delegate.sizeHint(option, index) == delegate._item_size
def test_cmap_line_edit(qtbot, qapp):
wdg = QColormapLineEdit()
qtbot.addWidget(wdg)
wdg.show()
wdg.setColormap("viridis")
assert wdg.colormap() == Colormap("viridis")
wdg.setText("magma") # also works if the name is recognized
assert wdg.colormap() == Colormap("magma")
qapp.processEvents()
qtbot.wait(10) # force the paintEvent
wdg.setFractionalColormapWidth(1)
assert wdg.fractionalColormapWidth() == 1
wdg.update()
qapp.processEvents()
qtbot.wait(10) # force the paintEvent
wdg.setText("not-a-cmap")
assert wdg.colormap() is None
# or
wdg.setFractionalColormapWidth(0.3)
wdg.setColormap(None)
assert wdg.colormap() is None
qapp.processEvents()
qtbot.wait(10) # force the paintEvent
|
