def test_opacity():
"""Test setting layer opacity."""
np.random.seed(0)
data = np.random.random((10, 15))
layer = Image(data)
assert layer.opacity == 1
layer.opacity = 0.5
assert layer.opacity == 0.5
layer = Image(data, opacity=0.6)
assert layer.opacity == 0.6
layer.opacity = 0.3
assert layer.opacity == 0.3
def test_opacity():
"""Test setting layer opacity."""
shapes = [(40, 20), (20, 10), (10, 5)]
np.random.seed(0)
data = [np.random.random(s) for s in shapes]
layer = Image(data, is_pyramid=True)
assert layer.opacity == 1.0
layer.opacity = 0.5
assert layer.opacity == 0.5
layer = Image(data, is_pyramid=True, opacity=0.6)
assert layer.opacity == 0.6
layer.opacity = 0.3
assert layer.opacity == 0.3
def test_layer_multiple_viewers(make_napari_viewer):
"""Test layer on multiple viewers."""
# Check that a layer can be added and removed from
# mutliple viewers. See https://github.com/napari/napari/issues/1503
# for more detail.
viewer_a = make_napari_viewer()
viewer_b = make_napari_viewer()
# create layer
layer = Image(np.random.random((30, 40)))
# add layer
viewer_a.layers.append(layer)
viewer_b.layers.append(layer)
# Change property
layer.opacity = 0.8
assert layer.opacity == 0.8
# Remove layer from one viewer
viewer_b.layers.remove(layer)
# Change property
layer.opacity = 0.6
assert layer.opacity == 0.6
