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import numpy as np
import pyqtgraph as pg
app = pg.mkQApp()
def test_nan_image():
img = np.ones((10,10))
img[0,0] = np.nan
iv = pg.ImageView()
iv.setImage(img)
iv.show()
iv.getImageItem().getHistogram()
app.processEvents()
iv.window().close()
def test_timeslide_snap():
count = 31
frames = np.ones((count, 10, 10))
iv = pg.ImageView(discreteTimeLine=True)
assert iv.nframes() == 0
iv.setImage(frames, xvals=(np.linspace(0., 1., count)))
iv.show()
assert iv.nframes() == count
speed = count / 2
iv.play(speed)
assert iv.playRate == speed
iv.timeLine.setPos(0.51) # side effect: also pauses playback
assert iv.playRate == 0
ind, val = iv.timeIndex(iv.timeLine)
assert ind == count // 2
assert val == 0.5
iv.togglePause() # restarts playback
assert iv.playRate == speed
iv.togglePause() # pauses playback
assert iv.playRate == 0
iv.play()
assert iv.playRate == speed
def test_init_with_mode_and_imageitem():
data = np.random.randint(256, size=(256, 256, 3))
imgitem = pg.ImageItem(data)
pg.ImageView(imageItem=imgitem, levelMode="rgba")
assert(pg.image is not None)
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