def test_register_theme():
# Check that blue theme is not listed in available themes
themes = available_themes()
assert 'test_blue' not in themes
# Create new blue theme based on dark theme
blue_theme = get_theme('dark')
blue_theme.update(
background='rgb(28, 31, 48)',
foreground='rgb(45, 52, 71)',
primary='rgb(80, 88, 108)',
current='rgb(184, 112, 0)',
)
# Register blue theme
register_theme('test_blue', blue_theme)
# Check that blue theme is listed in available themes
themes = available_themes()
assert 'test_blue' in themes
# Check that the dark theme has not been overwritten
dark_theme = get_theme('dark')
assert not dark_theme['background'] == blue_theme['background']
# Check that blue theme can be gotten from available themes
theme = get_theme('test_blue')
assert theme['background'] == blue_theme['background']
def test_provide_theme_hook_unregister(
napari_plugin_manager: "NapariPluginManager", ):
with pytest.warns(FutureWarning):
dark = get_theme("dark")
dark["name"] = "dark-test"
class TestPlugin:
@napari_hook_implementation
def napari_experimental_provide_theme():
return {"dark-test": dark}
napari_plugin_manager.discover_themes()
napari_plugin_manager.register(TestPlugin)
# make sure theme was registered
assert "TestPlugin" in napari_plugin_manager._theme_data
reg = napari_plugin_manager._theme_data["TestPlugin"]
assert isinstance(reg, dict)
assert len(reg) == 1
assert "dark-test" in available_themes()
get_settings().appearance.theme = "dark-test"
with pytest.warns(UserWarning, match="The current theme "):
napari_plugin_manager.unregister("TestPlugin")
# make sure that plugin-specific data was removed
assert "TestPlugin" not in napari_plugin_manager._theme_data
# since the plugin was unregistered, the current theme cannot
# be the theme registered by the plugin
assert get_settings().appearance.theme != "dark-test"
assert "dark-test" not in available_themes()
def test_rebuild_theme_settings():
settings = get_settings()
assert "another-theme" not in available_themes()
# theme is not updated
with pytest.raises(ValidationError):
settings.appearance.theme = "another-theme"
blue_theme = get_theme("dark")
register_theme("another-theme", blue_theme)
settings.appearance.theme = "another-theme"
def test_unregister_theme():
# Create new blue theme based on dark theme
blue_theme = get_theme('dark')
blue_theme.update(
background='rgb(28, 31, 48)',
foreground='rgb(45, 52, 71)',
primary='rgb(80, 88, 108)',
current='rgb(184, 112, 0)',
)
# Register blue theme
register_theme('test_blue', blue_theme)
# Check that blue theme is listed in available themes
themes = available_themes()
assert 'test_blue' in themes
# Remove theme from available themes
unregister_theme("test_blue")
themes = available_themes()
assert 'test_blue' not in themes
def test_provide_theme_hook(napari_plugin_manager: "NapariPluginManager"):
with pytest.warns(FutureWarning):
dark = get_theme("dark")
dark["name"] = "dark-test"
class TestPlugin:
@napari_hook_implementation
def napari_experimental_provide_theme():
return {"dark-test": dark}
viewer = ViewerModel()
napari_plugin_manager.discover_themes()
napari_plugin_manager.register(TestPlugin)
# make sure theme data is present in the plugin
reg = napari_plugin_manager._theme_data["TestPlugin"]
assert isinstance(reg, dict)
assert len(reg) == 1
assert isinstance(reg["dark-test"], Theme)
# make sure theme was registered
assert "dark-test" in available_themes()
viewer.theme = "dark-test"
def test_provide_theme_hook_bad(napari_plugin_manager: "NapariPluginManager"):
napari_plugin_manager.discover_themes()
with pytest.warns(FutureWarning):
dark = get_theme("dark")
dark.pop("foreground")
dark["name"] = "dark-bad"
class TestPluginBad:
@napari_hook_implementation
def napari_experimental_provide_theme():
return {"dark-bad": dark}
with pytest.warns(
UserWarning,
match=", plugin 'TestPluginBad' provided an invalid dict object",
):
napari_plugin_manager.register(TestPluginBad)
# make sure theme data is present in the plugin but the theme is not there
reg = napari_plugin_manager._theme_data["TestPluginBad"]
assert isinstance(reg, dict)
assert len(reg) == 0
assert "dark-bad" not in available_themes()
@skip_local_popups
def test_leaks_labels(qtbot, make_napari_viewer):
viewer = make_napari_viewer(show=True)
lr = weakref.ref(
viewer.add_labels((np.random.rand(10, 10) * 10).astype(np.uint8)))
dr = weakref.ref(lr().data)
viewer.layers.clear()
qtbot.wait(100)
gc.collect()
assert not gc.collect()
assert not lr()
assert not dr()
@pytest.mark.parametrize("theme", available_themes())
def test_canvas_color(make_napari_viewer, theme):
"""Test instantiating viewer with different themes.
See: https://github.com/napari/napari/issues/3278
"""
# This test is to make sure the application starts with
# with different themes
get_settings().appearance.theme = theme
viewer = make_napari_viewer()
assert viewer.theme == theme
def test_remove_points(make_napari_viewer):
viewer = make_napari_viewer()
viewer.add_points([(1, 2), (2, 3)])
"""
Displays an image and sets the theme to new custom theme.
"""
from skimage import data
import napari
from napari.utils.theme import available_themes, get_theme, register_theme
with napari.gui_qt():
# create the viewer with an image
viewer = napari.view_image(data.astronaut(), rgb=True, name='astronaut')
# List themes
print('Originally themes', available_themes())
blue_theme = get_theme('dark')
blue_theme.update(
background='rgb(28, 31, 48)',
foreground='rgb(45, 52, 71)',
primary='rgb(80, 88, 108)',
current='rgb(184, 112, 0)',
)
register_theme('blue', blue_theme)
# List themes
print('New themes', available_themes())
# Set theme
viewer.theme = 'blue'
def test_default_themes():
themes = available_themes()
assert 'dark' in themes
assert 'light' in themes