class TestSliceFinderFilter(unittest.TestCase):
def setUp(self):
self.gui = GUI(GeistFakeBackend())
def test_index(self):
screen = self.gui.capture_locations()[0]
self.locs = LocationList([Location(0, 0, w=10, h=10, parent=screen),
Location(0, 8, w=10, h=10, parent=screen),
Location(0, 2, w=10, h=10, parent=screen),
Location(6, 8, w=10, h=10, parent=screen)])
expected = LocationList([Location(0, 0, w=10, h=10, parent=screen),
Location(0, 8, w=10, h=10, parent=screen)])
finder = SliceFinderFilter(self.locs)
actual = self.gui.find_all(finder[:2])
self.assertListEqual(actual, expected)
def test_slice(self):
screen = self.gui.capture_locations()[0]
self.locs = LocationList([Location(0, 0, w=10, h=10, parent=screen),
Location(0, 8, w=10, h=10, parent=screen),
Location(0, 2, w=10, h=10, parent=screen),
Location(6, 8, w=10, h=10, parent=screen)])
expected = LocationList([Location(0, 0, w=10, h=10, parent=screen),
Location(0, 8, w=10, h=10, parent=screen)])
finder = SliceFinderFilter(self.locs)
actual = self.gui.find_all(finder[slice(0, 2)])
self.assertListEqual(actual, expected)
def test_nontrivial_StopChangingFinder(self):
backend = GeistFakeBackend(image=np.array([[[0], [0]], [[0], [0]]]))
gui = GUI(backend)
finder = StopChangingFinder(self.location)
# backend.image = np.array([[[0],[0]],[[0],[0]]])
finder.period = 1
location_found = gui.wait_find_one(finder)
self.assertTrue(np.array_equal(location_found.image, backend.image))
def test_nontrivial_StopChangingFinder(self):
backend = GeistFakeBackend(image=np.array([[[0], [0]], [[0], [0]]]))
gui = GUI(backend)
finder = StopChangingFinder(self.location)
#backend.image = np.array([[[0],[0]],[[0],[0]]])
finder.period = 1
location_found = gui.wait_find_one(finder)
self.assertTrue(np.array_equal(location_found.image, backend.image))
def setUp(self):
self.gui = GUI(GeistFakeBackend())
self.screen = self.gui.capture_locations()[0]
self.locs_a = LocationList(
[Location(10, 13, w=5, h=5, parent=self.screen)])
self.locs_b = LocationList([
Location(0, 2, w=5, h=5, parent=self.screen),
Location(0, 24, w=5, h=5, parent=self.screen),
Location(22, 2, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen)
])
def setUp(self):
self.repo = DirectoryRepo('test_repo')
self.gui = GUI(
GeistFakeBackend(image=np.array(
[[[255, 0, 0], [240, 10, 10], [0, 255, 0], [0, 0, 255]],
[[255, 0, 0], [240, 10, 10], [0, 255, 0], [0, 0, 255]],
[[255, 0, 0], [240, 10, 10], [0, 255, 0], [0, 0, 255]],
[[255, 0, 0], [240, 10, 10], [0, 255, 0], [0, 0, 255]]])))
self.V = Viewer(self.gui, self.repo)
self.screen = self.gui.capture_locations()[0]
self.red = np.array([[[255, 0, 0]]])
self.more_reds = np.array([[[255, 0, 0], [240, 10, 10]]])
class TestLocationFinderFilter(unittest.TestCase):
def setUp(self):
self.gui = GUI(GeistFakeBackend())
def test_filter(self):
in_location = self.gui.wait_find_one(Location(10, 10, 100, 100))
parent_x, parent_y = 40, 50
child_x, child_y = 100, 17
finder = FinderInFinder(Location(child_x, child_y, 100, 100), Location(parent_x, parent_y, 500, 500))
result = self.gui.wait_find_one(finder)
self.assertEqual(parent_x + child_x, result.x)
self.assertEqual(parent_y + child_y, result.y)
class TestLocationFinderFilter(unittest.TestCase):
def setUp(self):
self.gui = GUI(GeistFakeBackend())
def test_filter(self):
in_location = self.gui.wait_find_one(Location(10, 10, 100, 100))
parent_x, parent_y = 40, 50
child_x, child_y = 100, 17
finder = FinderInFinder(Location(child_x, child_y, 100, 100),
Location(parent_x, parent_y, 500, 500))
result = self.gui.wait_find_one(finder)
self.assertEqual(parent_x + child_x, result.x)
self.assertEqual(parent_y + child_y, result.y)
def test_replay_capture_works(self):
capture_file = os.path.join(
_DIR,
'test_replay_capture_works.log')
backend = RecordingBackend(
source_backend=GeistFakeBackend(),
recording_filename=capture_file
)
gui = GUI(backend)
locations_record = gui.capture_locations()
backend = PlaybackBackend(recording_filename=capture_file)
gui = GUI(backend)
locations_playback = gui.capture_locations()
assert locations_record == locations_playback
class TestSortingFinder(unittest.TestCase):
def setUp(self):
self.gui = GUI(GeistFakeBackend())
def test_sort(self):
screen = self.gui.capture_locations()[0]
self.locs = LocationList([Location(0, 0, w=10, h=10, parent=screen),
Location(0, 8, w=10, h=10, parent=screen),
Location(0, 2, w=10, h=10, parent=screen),
Location(6, 8, w=10, h=10, parent=screen)])
self.key = lambda loc: loc.y
expected = sorted(self.locs, key=self.key)
finder = SortingFinder(self.locs, key=self.key)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def setUp(self):
self.repo = DirectoryRepo('test_repo')
self.gui = GUI(GeistFakeBackend(image=np.array([[[255,0,0],[240,10,10],[0,255,0],[0,0,255]]])))
self.V = Viewer(self.gui, self.repo)
self.screen = self.gui.capture_locations()[0]
self.red = np.array([[[255,0,0]]])
self.more_reds = np.array([[[255,0,0],[240,10,10]]])
class TestLocationFinderFilter(unittest.TestCase):
def setUp(self):
self.gui = GUI(GeistFakeBackend())
def test_filter(self):
screen = self.gui.capture_locations()[0]
self.locs = LocationList([Location(0, 0, w=10, h=10, parent=screen),
Location(0, 8, w=10, h=10, parent=screen),
Location(0, 2, w=10, h=10, parent=screen),
Location(6, 8, w=10, h=10, parent=screen)])
filter = lambda loc: loc.y == 8
expected = LocationList([Location(0, 8, w=10, h=10, parent=screen),
Location(6, 8, w=10, h=10, parent=screen)])
finder = LocationFinderFilter(filter, self.locs)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_keyboard_works(self):
capture_file = os.path.join(_DIR, 'test_keyboard_works.log')
backend = RecordingBackend(source_backend=GeistFakeBackend(),
recording_filename=capture_file)
gui = GUI(backend)
gui.key_presses('abcd')
backend = PlaybackBackend(recording_filename=capture_file)
gui = GUI(backend)
gui.key_presses('abcd')
def test_mouse_works(self):
capture_file = os.path.join(_DIR, 'test_mouse_works.log')
backend = RecordingBackend(source_backend=GeistFakeBackend(),
recording_filename=capture_file)
gui = GUI(backend)
gui.click(Location(10, 10))
backend = PlaybackBackend(recording_filename=capture_file)
gui = GUI(backend)
gui.click(Location(10, 10))
def test_ClickingFinder(self):
backend = GeistMouseBackend()
gui = GUI(backend)
finder = ClickingFinder(self.location, gui)
# things only happen when generator consumed
list(finder.find(self.location))
self.assertTrue(backend.button_up_pressed)
self.assertTrue(backend.button_down_pressed)
self.assertIn((0, 0), backend.list_of_points)
class TestViewer(unittest.TestCase):
def setUp(self):
self.repo = DirectoryRepo('test_repo')
self.gui = GUI(GeistFakeBackend(image=np.array([[[255,0,0],[240,10,10],[0,255,0],[0,0,255]]])))
self.V = Viewer(self.gui, self.repo)
self.screen = self.gui.capture_locations()[0]
self.red = np.array([[[255,0,0]]])
self.more_reds = np.array([[[255,0,0],[240,10,10]]])
def test_get_colour(self):
red = self.V._get_colour(self.red)
result = self.gui.find_all(BinaryRegionFinder(red))
expected = [Location(0,0, w=1, h=1, parent=self.screen)]
self.assertListEqual(result, expected)
def test_get_colour_range(self):
reds = self.V._get_colour(self.more_reds)
result = self.gui.find_all(BinaryRegionFinder(reds))
expected = [Location(0,0, w=2, h=1, parent=self.screen)]
self.assertListEqual(result, expected)
def test_save(self):
self.V._save('test_file', np.array([0]))
self.assertIn('test_file', self.repo.entries)
def test_save_overwrite(self):
self.V._save('test_file', np.array([0]))
with self.assertRaises(KeyError):
self.V._save('test_file', np.array([1]))
def test_save_force(self):
self.V._save('test_file', np.array([0]))
self.V._save('test_file', np.array([1]), force=True)
self.assertEqual(self.repo['test_file'].image, np.array([1]))
def tearDown(self):
if 'test_file' in self.repo.entries:
del self.repo['test_file']
def setUp(self):
self.gui = GUI(GeistFakeBackend())
self.screen = self.gui.capture_locations()[0]
self.locs_a = LocationList([
Location(10, 13, w=5, h=5, parent=self.screen)])
self.locs_b = LocationList([
Location(0, 2, w=5, h=5, parent=self.screen),
Location(0, 24, w=5, h=5, parent=self.screen),
Location(22, 2, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen)])
class TestViewer(unittest.TestCase):
def setUp(self):
self.repo = DirectoryRepo('test_repo')
self.gui = GUI(
GeistFakeBackend(image=np.array(
[[[255, 0, 0], [240, 10, 10], [0, 255, 0], [0, 0, 255]],
[[255, 0, 0], [240, 10, 10], [0, 255, 0], [0, 0, 255]],
[[255, 0, 0], [240, 10, 10], [0, 255, 0], [0, 0, 255]],
[[255, 0, 0], [240, 10, 10], [0, 255, 0], [0, 0, 255]]])))
self.V = Viewer(self.gui, self.repo)
self.screen = self.gui.capture_locations()[0]
self.red = np.array([[[255, 0, 0]]])
self.more_reds = np.array([[[255, 0, 0], [240, 10, 10]]])
def test_get_colour(self):
red = self.V._get_colour(self.red)
result = self.gui.find_all(BinaryRegionFinder(red))
expected = [Location(0, 0, w=1, h=4, parent=self.screen)]
self.assertListEqual(result, expected)
def test_get_colour_range(self):
reds = self.V._get_colour(self.more_reds)
result = self.gui.find_all(BinaryRegionFinder(reds))
expected = [Location(0, 0, w=2, h=4, parent=self.screen)]
self.assertListEqual(result, expected)
def test_save(self):
self.V._save('test_file', np.array([0]))
self.assertIn('test_file', self.repo.entries)
def test_save_overwrite(self):
self.V._save('test_file', np.array([0]))
with self.assertRaises(KeyError):
self.V._save('test_file', np.array([1]))
def test_save_force(self):
self.V._save('test_file', np.array([0]))
self.V._save('test_file', np.array([1]), force=True)
self.assertEqual(self.repo['test_file'].image, np.array([1]))
def tearDown(self):
if 'test_file' in self.repo.entries:
del self.repo['test_file']
class TestViewer(unittest.TestCase):
def setUp(self):
self.repo = DirectoryRepo('test_repo')
self.gui = GUI(GeistFakeBackend(image=np.array([[[255,0,0],[240,10,10],[0,255,0],[0,0,255]]])))
self.V = Viewer(self.gui, self.repo)
self.screen = self.gui.capture_locations()[0]
self.red = np.array([[[255,0,0]]])
self.more_reds = np.array([[[255,0,0],[240,10,10]]])
def test_get_colour(self):
red = self.V._get_colour(self.red)
result = self.gui.find_all(BinaryRegionFinder(red))
expected = [Location(0,0, w=1, h=1, parent=self.screen)]
self.assertListEqual(result, expected)
def test_get_colour_range(self):
reds = self.V._get_colour(self.more_reds)
result = self.gui.find_all(BinaryRegionFinder(reds))
expected = [Location(0,0, w=2, h=1, parent=self.screen)]
self.assertListEqual(result, expected)
class TestMouseDrag(unittest.TestCase):
def setUp(self):
self.backend = GeistMouseBackend()
self.gui = GUI(self.backend)
# need ot be getting cursor position while the drag operation is happening
# need to define functions to run concurrently
def test_mouse_drag_y_dir(self):
self.gui.drag(Location(200, 200), Location(201, 900))
# this overshoots on y then goes back, not ideal!!
positions = [
(200, 200), (200, 250), (200, 300), (200, 350), (200, 400),
(200, 450), (200, 500), (200, 550), (200, 600), (200, 650),
(200, 700), (200, 750), (200, 800), (200, 850), (201, 900),
(201, 900)
]
self.assertEquals(sorted(positions),
sorted(self.backend.list_of_points))
self.assertTrue(self.backend.button_down_pressed)
self.assertTrue(self.backend.button_up_pressed)
def test_mouse_drag_equal_dirs(self):
self.gui.drag(Location(200, 200), Location(400, 400))
positions = [(200, 200), (240, 240), (280, 280), (320, 320),
(360, 360), (400, 400), (400, 400)]
self.assertEquals(sorted(positions),
sorted(self.backend.list_of_points))
self.assertTrue(self.backend.button_down_pressed)
self.assertTrue(self.backend.button_up_pressed)
def test_mouse_drag_x_dir(self):
self.gui.drag(Location(200, 200), Location(0, 200))
positions = [(0, 200), (0, 200), (50, 200), (100, 200), (150, 200),
(200, 200)]
self.assertEquals(sorted(positions),
sorted(self.backend.list_of_points))
self.assertTrue(self.backend.button_down_pressed)
self.assertTrue(self.backend.button_up_pressed)
def test_mouse_move_increment(self):
self.gui.drag(Location(200, 200),
Location(400, 400),
mouse_move_increment=100)
positions = [(200, 200), (300, 300), (400, 400), (400, 400)]
self.assertEquals(sorted(positions),
sorted(self.backend.list_of_points))
self.assertTrue(self.backend.button_down_pressed)
self.assertTrue(self.backend.button_up_pressed)
def test_replay_capture_works(self):
capture_file = os.path.join(_DIR, 'test_replay_capture_works.log')
backend = RecordingBackend(source_backend=GeistFakeBackend(),
recording_filename=capture_file)
gui = GUI(backend)
locations_record = gui.capture_locations()
backend = PlaybackBackend(recording_filename=capture_file)
gui = GUI(backend)
locations_playback = gui.capture_locations()
assert locations_record == locations_playback
def setUp(self):
self.repo = DirectoryRepo('test_repo')
self.gui = GUI(GeistFakeBackend())
self.V = Viewer(self.gui, self.repo)
# first need to save some images to repo
self.image = np.array([[0, 0, 0, 0, 0],
[0, 0, 0, 1, 0],
[0, 0, 1, 0, 0],
[0, 1, 0, 0, 0],
[0, 0, 0, 0, 0]])
self.image2 = np.array([[0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 1, 0, 0, 0],
[0, 0, 1, 0, 0, 0, 0],
[0, 1, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0]])
self.image3 = np.array([[[255,0,0],[240,10,10],[0,255,0],[0,0,255]]], dtype=np.int32)
self.V._save('test_file_1', self.image, force=True)
self.V._save('test_file_2', self.image2, force=True)
self.V._save('test_file_3', self.image3, force=True)
def test_mouse_works(self):
capture_file = os.path.join(
_DIR,
'test_mouse_works.log'
)
backend = RecordingBackend(
source_backend=GeistFakeBackend(),
recording_filename=capture_file
)
gui = GUI(backend)
gui.click(Location(10, 10))
backend = PlaybackBackend(recording_filename=capture_file)
gui = GUI(backend)
gui.click(Location(10, 10))
def test_keyboard_works(self):
capture_file = os.path.join(
_DIR,
'test_keyboard_works.log'
)
backend = RecordingBackend(
source_backend=GeistFakeBackend(),
recording_filename=capture_file
)
gui = GUI(backend)
gui.key_presses('abcd')
backend = PlaybackBackend(recording_filename=capture_file)
gui = GUI(backend)
gui.key_presses('abcd')
class TestMouseDrag(unittest.TestCase):
def setUp(self):
self.backend = GeistMouseBackend()
self.gui = GUI(self.backend)
# need ot be getting cursor position while the drag operation is happening
# need to define functions to run concurrently
def test_mouse_drag_y_dir(self):
self.gui.drag(Location(200,200), Location(201,900))
# this overshoots on y then goes back, not ideal!!
positions = [(200, 200), (200, 250), (200, 300), (200, 350),
(200, 400), (200, 450), (200, 500), (200, 550),
(200, 600), (200, 650), (200, 700), (200, 750),
(200, 800), (200, 850), (201, 900), (201, 900)]
self.assertEquals(sorted(positions), sorted(self.backend.list_of_points))
self.assertTrue(self.backend.button_down_pressed)
self.assertTrue(self.backend.button_up_pressed)
def test_mouse_drag_equal_dirs(self):
self.gui.drag(Location(200,200), Location(400, 400))
positions = [(200,200),(240,240), (280, 280), (320, 320), (360, 360), (400,400), (400,400)]
self.assertEquals(sorted(positions), sorted(self.backend.list_of_points))
self.assertTrue(self.backend.button_down_pressed)
self.assertTrue(self.backend.button_up_pressed)
def test_mouse_drag_x_dir(self):
self.gui.drag(Location(200,200), Location(0, 200))
positions = [(0, 200), (0, 200), (50, 200), (100, 200), (150, 200), (200, 200)]
self.assertEquals(sorted(positions), sorted(self.backend.list_of_points))
self.assertTrue(self.backend.button_down_pressed)
self.assertTrue(self.backend.button_up_pressed)
def test_mouse_move_increment(self):
self.gui.drag(Location(200,200), Location(400, 400), mouse_move_increment=100)
positions = [(200,200), (300, 300), (400,400), (400,400)]
self.assertEquals(sorted(positions), sorted(self.backend.list_of_points))
self.assertTrue(self.backend.button_down_pressed)
self.assertTrue(self.backend.button_up_pressed)
def setUp(self):
self.backend = GeistMouseBackend()
self.gui = GUI(self.backend)
class TestOperators(unittest.TestCase):
def setUp(self):
self.gui = GUI(GeistFakeBackend())
self.screen = self.gui.capture_locations()[0]
self.locs_a = LocationList([
Location(10, 13, w=5, h=5, parent=self.screen)])
self.locs_b = LocationList([
Location(0, 2, w=5, h=5, parent=self.screen),
Location(0, 24, w=5, h=5, parent=self.screen),
Location(22, 2, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen)])
def test_below(self):
expected = LocationList([
Location(0, 24, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen)])
finder = LocationOperatorFinder(LocationList(self.locs_b), below,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_left_of(self):
expected = LocationList([
Location(0, 2, w=5, h=5, parent=self.screen),
Location(0, 24, w=5, h=5, parent=self.screen)])
finder = LocationOperatorFinder(LocationList(self.locs_b), left_of,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_right_of(self):
self.maxDiff = None
expected = LocationList([
Location(22, 2, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen),
])
finder = LocationOperatorFinder(LocationList(self.locs_b), right_of,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_and(self):
below_and_left = below & left_of
expected = [Location(0, 24, w=5, h=5, parent=self.screen)]
finder = LocationOperatorFinder(self.locs_b, below_and_left,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_invert(self):
not_below = ~below
expected = [Location(0, 2, w=5, h=5, parent=self.screen),
Location(22, 2, w=5, h=5, parent=self.screen)]
finder = LocationOperatorFinder(self.locs_b, not_below, self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_or(self):
below_or_left = below | left_of
expected = [Location(0, 2, w=5, h=5, parent=self.screen),
Location(0, 24, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen)]
finder = LocationOperatorFinder(self.locs_b, below_or_left,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
class TestOperators(unittest.TestCase):
def setUp(self):
self.gui = GUI(GeistFakeBackend())
self.screen = self.gui.capture_locations()[0]
self.locs_a = LocationList(
[Location(10, 13, w=5, h=5, parent=self.screen)])
self.locs_b = LocationList([
Location(0, 2, w=5, h=5, parent=self.screen),
Location(0, 24, w=5, h=5, parent=self.screen),
Location(22, 2, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen)
])
def test_below(self):
expected = LocationList([
Location(0, 24, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen)
])
finder = LocationOperatorFinder(LocationList(self.locs_b), below,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_left_of(self):
expected = LocationList([
Location(0, 2, w=5, h=5, parent=self.screen),
Location(0, 24, w=5, h=5, parent=self.screen)
])
finder = LocationOperatorFinder(LocationList(self.locs_b), left_of,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_right_of(self):
self.maxDiff = None
expected = LocationList([
Location(22, 2, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen),
])
finder = LocationOperatorFinder(LocationList(self.locs_b), right_of,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_and(self):
below_and_left = below & left_of
expected = [Location(0, 24, w=5, h=5, parent=self.screen)]
finder = LocationOperatorFinder(self.locs_b, below_and_left,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_invert(self):
not_below = ~below
expected = [
Location(0, 2, w=5, h=5, parent=self.screen),
Location(22, 2, w=5, h=5, parent=self.screen)
]
finder = LocationOperatorFinder(self.locs_b, not_below, self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def test_or(self):
below_or_left = below | left_of
expected = [
Location(0, 2, w=5, h=5, parent=self.screen),
Location(0, 24, w=5, h=5, parent=self.screen),
Location(22, 24, w=5, h=5, parent=self.screen)
]
finder = LocationOperatorFinder(self.locs_b, below_or_left,
self.locs_a)
actual = self.gui.find_all(finder)
self.assertListEqual(actual, expected)
def setUp(self):
self.gui = GUI(GeistFakeBackend())
def setUp(self):
self.gui = GUI(GeistFakeBackend())
def setUp(self):
self.backend = GeistMouseBackend()
self.gui = GUI(self.backend)
Use the viewer object to capture images and test finders in an interactive ipython
"""
try:
get_ipython().magic('pylab')
except (NameError, ):
pass
from geist.backends import get_platform_backend
from geist import (
GUI,
DirectoryRepo,
)
from geist.pyplot import Viewer
# Mark the directory listed as the current image repository
repo = DirectoryRepo(
"C:\some_filepath") # <--------------- EDIT ME!!!!!!!!!!!!!!!
# Start a Geist backend, takes an optional screen number to capture.
backend = get_platform_backend()
# Start a Geist GUI
gui = GUI(backend)
# Viewer object can be used to display results in image form
viewer = Viewer(gui, repo)
