def test_howto_example_invert_region(self):
"""tests the sixth canvas example from howto"""
test_image = get_image("canvas_6.png")
o = get_mock_output()
c = Canvas(o, name=c_name)
c.text("Hello world", (5, 5))
c.invert_rect((35, 5, 80, 17))
assert(imgs_are_equal(c.get_image(), test_image))
def test_invert_region_rgb(self):
"""tests that rgb canvas inversion doesn't fail with RGB displays and returns a valid RGB image"""
test_image = get_image("canvas_6.png")
o = get_mock_output(mode="RGB")
c = Canvas(o, name=c_name)
c.text("Hello world", (5, 5))
c.invert_rect((35, 5, 80, 17))
assert (c.get_image().mode == o.device_mode)
assert (imgs_are_equal(c.get_image(), test_image.convert("RGB")))
def show(lines):
if len(lines) < 4:
max = len(lines)
else:
max = 4
index = values.get_index()
if index == 1:
index = 2 # row 3
c = Canvas(o)
for n in range(max):
y = n * char_height
c.text(lines[n], (0, y), font=font1)
if n == index and blink.isSet(): # row 0 or 3 && blink
c.invert_rect(
(127 - 8, y + char_height - 4, 127, y + char_height - 1))
c.display()